Description:FIELD OF DISCLOSURE
[0001] The present disclosure generally relates to a composition and method of preparation, more specifically, relates to low carbon self-compacting concrete composition and preparation method thereof based on high volume fly ash and dolomite powder blend.
BACKGROUND OF THE DISCLOSURE
[0002] Cement is a crucial component in the production of concrete, serving as one of the key materials used in construction, cement plays a vital role in shaping infrastructure globally. India stands as the second-largest producer of cement in the world, reflecting its significant role in the construction and infrastructure sectors. However, the cement production process is highly energy-intensive and environmentally taxing, as it is estimated that for every ton of cement produced, approximately 8 tons of carbon dioxide are released into the atmosphere. This substantial carbon footprint raises concerns about the environmental impact of cement manufacturing, contributing to the global challenge of reducing industrial emissions.
[0003] A promising solution to address the environmental impact of cement production is the development and adoption of alternative and eco-friendly materials. One such approach is the use of supplementary cementitious materials like fly ash, slag, and silica fume, etc which can partially replace cement in concrete mixes, reducing the overall carbon footprint. Another forward-looking solution is the development of low-carbon and carbon-neutral cements. Together, these can significantly mitigate the environmental challenges posed by cement manufacturing.
[0004] Traditional compositions and production methods have several limitations, particularly in terms of environmental impact and resource consumption. The most significant issue is the high carbon dioxide emissions associated with cement production, as the process requires intense heat to transform limestone into clinker, releasing substantial amounts of carbon dioxide. Additionally, the production of cement relies heavily on non-renewable resources, which is being depleted over time.
[0005] Conventional compositions and methods often struggle in providing homogenous and uniform concrete composition. Further, the energy-intensive nature of traditional methods also contributes to the high carbon footprint, as fossil fuels are often used to heat cement kilns. Furthermore, traditional cement mixtures can be prone to cracking and durability issues under certain conditions, limiting their long-term sustainability. These limitations highlight the urgent need for more efficient, sustainable alternatives to traditional cement compositions and production methods.
[0006] The present invention addresses the limitations of the prior art by offering a low carbon self-compacting concrete composition and preparation method thereof, which primarily focusing on sustainability and environmental impact reduction. By incorporating alternative materials, such as industrial by-products or low-carbon alternatives, the present invention reduces the carbon footprint of cement production significantly. It also requires less energy in the manufacturing process, minimizing reliance on fossil fuels and decreasing greenhouse gas emissions. Further, concrete utilization of by-products from industries may cut down the costs as well as emissions of carbon dioxide produced in the process of cement production.
[0007] Additionally, the present invention enhances the durability and longevity of concrete, making it more resistant to cracking, corrosion, and environmental degradation. Moreover, it may utilize abundant, renewable resources, contributing to more sustainable construction practices and reducing the depletion of non-renewable raw materials. Overall, the present invention provides a more eco-friendly, cost-effective, and durable solution for the global construction industry.
[0008] Thus, in light of the above-stated discussion, there exists a need for a low carbon self-compacting concrete composition and preparation method thereof.
SUMMARY OF THE DISCLOSURE
[0009] The following is a summary description of illustrative embodiments of the invention. It is provided as a preface to assist those skilled in the art to more rapidly assimilate the detailed design discussion which ensues and is not intended in any way to limit the scope of the claims which are appended hereto in order to particularly point out the invention.
[0010] According to illustrative embodiments, the present disclosure focuses on a low carbon self-compacting concrete composition and preparation method thereof which overcomes the above-mentioned disadvantages or provide the users with a useful or commercial choice.
[0011] An objective of the present disclosure is to provide a composition and method of production of low carbon self-compacting concrete, focusing on sustainability and environmental impact reduction.
[0012] Another objective of the present disclosure is to minimize the carbon dioxide emissions associated with cement manufacturing by using alternative materials.
[0013] Another objective of the present disclosure is to lower the energy consumption required in the cement production process and decrease reliance on fossil fuels.
[0014] Another objective of the present disclosure is to improve the long-term performance and durability of concrete by increasing its resistance to cracking, corrosion, and environmental wear.
[0015] Another objective of the present disclosure is to offer a cost-efficient concrete composition without compromising its quality and strength.
[0016] Yet another objective of the present disclosure is to develop a solution that relies on renewable, abundant resources and hence, contributing to the overall sustainability of the construction industry.
[0017] In light of the above, in one aspect of the present disclosure, a low carbon self-compacting concrete composition is disclosed herein. The composition comprises a pozzolanic additive in a pre-defined quantity, at-least two packing agents in a pre-defined quantity, at-least two binding agents in a pre-defined quantity, a coarse aggregate in a pre-defined quantity, a solvent in a pre-defined quantity, a flash setting inhibitor in a pre-defined quantity.
[0018] In light of the above, in one aspect of the present disclosure, a low carbon self-compacting concrete composition is disclosed herein. The composition comprises fly ash as the pozzolanic additive to provide mechanical integrity and durability to the composition, dolomite powder and silica fume as the packing agents to consolidate micro-voids and improve compaction density of the composition, cement and ground granulated blast furnace slag as the binding agents to cohesively bind the ingredients and enhance structural integrity, gravel as the coarse aggregate to enhance load bearing capacity, water as the solvent to facilitate dissolution and hydration of ingredients, gypsum as the flash setting inhibitor to prevent premature setting of the composition.
[0019] In one embodiment, the composition further comprises sand as a fine aggregate in a pre-defined quantity to improve workability and reduce carbon emission.
[0020] In one embodiment, the composition further comprises polycarboxylate-based admixture as a superplasticizer to enable a low water-to-cement ratio within the composition.
[0021] In one embodiment, the pre-defined quantity of the fly ash is 75 %.
[0022] In one embodiment, the pre-defined quantity of the dolomite powder is 5 %.
[0023] In one embodiment, the pre-defined quantity of the cement is 20 %.
[0024] In one embodiment, the fly ash reduces the heat of hydration and minimize the risk of thermal cracking.
[0025] In one embodiment, the dolomite powder and the silica fume resist corrosion and reduce permeability of the composition.
[0026] In light of the above, in one aspect of the present disclosure, a method for preparing low carbon self-compacting concrete is disclosed herein. The method comprising blending the fly ash, the dolomite powder, the silica fume, the cement, and the ground granulated blast furnace slag to obtain a homogeneous dry mixture. The method includes incorporating the fine aggregate and the coarse aggregate to the dry mixture with continuous agitation to ensure even distribution of the aggregates within the dry mixture, adding the solvent to the dry mixture with continuous stirring to form a paste owning homogeneous consistency. The method also includes dissolving the superplasticiser to the paste followed by adding the gypsum to prevent flash setting. The method further includes pouring the paste into molds and allowing to cure for 24 hours. Furthermore, the method includes demolding and immersing in the solvent for 7–28 days to obtain low carbon self-compacting concrete.
[0027] These and other advantages will be apparent from the present application of the embodiments described herein.
[0028] The preceding is a simplified summary to provide an understanding of some embodiments of the present invention. This summary is neither an extensive nor exhaustive overview of the present invention and its various embodiments. The summary presents selected concepts of the embodiments of the present invention in a simplified form as an introduction to the more detailed description presented below. As will be appreciated, other embodiments of the present invention are possible utilizing, alone or in combination, one or more of the features set forth above or described in detail below.
[0029] These elements, together with the other aspects of the present disclosure and various features are pointed out with particularity in the claims annexed hereto and form a part of the present disclosure. For a better understanding of the present disclosure, its operating advantages, and the specified object attained by its uses, reference should be made to the accompanying drawings and descriptive matter in which there are illustrated exemplary embodiments of the present disclosure.
BRIEF DESCRIPTION OF THE DRAWINGS
[0030] To describe the technical solutions in the embodiments of the present disclosure or in the prior art more clearly, the following briefly describes the accompanying drawings required for describing the embodiments or the prior art. Apparently, the accompanying drawings in the following description merely show some embodiments of the present disclosure, and a person of ordinary skill in the art can derive other implementations from these accompanying drawings without creative efforts. All of the embodiments or the implementations shall fall within the protection scope of the present disclosure.
[0031] The advantages and features of the present disclosure will become better understood with reference to the following detailed description taken in conjunction with the accompanying drawing, in which:
[0032] FIG. 1 illustrates a block diagram of a composition for a low carbon self-compacting concrete, in accordance with an embodiment of the present disclosure;
[0033] FIG. 2 illustrates a block diagram of a low carbon self-compacting concrete composition, in accordance with an embodiment of the present disclosure; and
[0034] FIG. 3 illustrates a flow-chart of a method, outlining the sequential steps for preparing a low carbon self-compacting concrete, in accordance with an embodiment of the present disclosure.
[0035] Like reference, numerals refer to like parts throughout the description of several views of the drawing.
[0036] The low carbon self-compacting concrete composition and preparation method thereof is illustrated in the accompanying drawings, which like reference letters indicate corresponding parts in the various figures. It should be noted that the accompanying figure is intended to present illustrations of exemplary embodiments of the present disclosure. This figure is not intended to limit the scope of the present disclosure. It should also be noted that the accompanying figure is not necessarily drawn to scale.
DETAILED DESCRIPTION OF THE DISCLOSURE
[0037] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure.
[0038] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It may be apparent to one skilled in the art that embodiments of the present disclosure may be practiced without some of these specific details.
[0039] Various terms as used herein are shown below. To the extent a term is used, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
[0040] The terms “a” and “an” herein do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced items.
[0041] The terms “having”, “comprising”, “including”, and variations thereof signify the presence of a component.
[0042] Referring now to FIG. 1 to FIG. 3 to describe various exemplary embodiments of the present disclosure. FIG. 1 illustrates a block diagram of a composition 100 for a low carbon self-compacting concrete, in accordance with an embodiment of the present disclosure.
[0043] The composition 100 includes a pozzolanic additive 102, at least two packing agents 104, at least two binding agents 106, a coarse aggregate 108, a solvent 110, a flash setting inhibitor 112, a fine aggregate 114, and a superplasticizer 116.
[0044] The pozzolanic additive 102 in a pre-defined quantity. It contributes to the low-carbon nature of the concrete by reducing the amount of Portland cement used and reduce the overall carbon footprint.
[0045] In embodiment of the present invention, the pre-defined quantity of the pozzolanic additive 102 lies in the range of 60 - 80 %.
[0046] At-least two packing agents 104 in a pre-defined quantity. The packing agents 104 improve the density and workability of the composition 100. They help optimize the particle distribution, fill the gaps and reduce voids which ensures better flowability and improved strength of the composition 100.
[0047] In one embodiment of the present invention, the pre-defined quantity of the packing agents 104 lies in the range of 5 – 10 %.
[0048] At-least two binding agents 106 in a pre-defined quantity. The binding agents 106 create a strong bond that hold all the ingredients of the composition 100 together. They ensure the formation of a durable and cohesive composition 100.
[0049] In one embodiment of the present invention, the pre-defined quantity of the binding agents 106 lies in the range of 15 – 50 %.
[0050] The coarse aggregate 108 in a pre-defined quantity. The coarse aggregate 108 provide the primary bulk to the composition 100. It also contributes to the strength and durability of the composition 100 by forming the structural skeleton.
[0051] In one embodiment of the present invention, the pre-defined quantity of the coarse aggregate 108 lies in the range of 20 – 35 %.
[0052] The solvent 110 in a pre-defined quantity. The solvent 110 serves as hydration medium, utilize to activate the cementitious materials and trigger the hydration process. This help achieve the desired consistency in the composition 100.
[0053] In one embodiment of the present invention, the pre-defined quantity of the solvent 110 lies in the range of 20 – 35 %.
[0054] The flash setting inhibitor 112 in a pre-defined quantity. It is added to control the rapid and premature setting of the composition 100 which occurs due to high temperatures or improper components ratios, causing the concrete to harden too quickly. By adding the flash setting inhibitor 112, the setting time is extended, allowing the composition to remain workable for longer periods, making it easier to place and mold the self-compacting concrete without loss of performance and durability.
[0055] In one embodiment of the present invention, the pre-defined quantity of the flash setting inhibitor 112 lies in the range of 2 – 5 %.
[0056] FIG. 2 illustrates a block diagram of a low carbon self-compacting concrete composition 200, in accordance with an embodiment of the present disclosure.
[0057] The composition 200 includes fly ash 202, dolomite powder 204, silica fume 206, cement 208, ground granulated blast furnace slag 210, gravel 212, water 214, gypsum 216, sand 218, and polycarboxylate-based admixture 220.
[0058] The fly ash 202 as the pozzolanic additive 102 to provide mechanical integrity and durability to the composition 200.
[0059] In one embodiment of the present invention, the fly ash 202 is a by-product of coal combustion and acts as the pozzolanic additive 102. It reacts with calcium hydroxide during hydration to form additional calcium silicate hydrate (C-S-H) gel that improves the mechanical strength and durability of the composition 200.
[0060] In one embodiment of the present invention, the fly ash 202 reduces the heat of hydration and minimize the risk of thermal cracking. When the fly ash 202 is used as a partial replacement for cement, the overall hydration process becomes more gradual. This slower hydration reduces the peak temperature rise and the total heat generated during curing. Also, the fly ash 202 lowers heat generation during the early stages of setting and curing and prevent the composition 200 from experiencing thermal cracking, making the composition 200 more sustainable.
[0061] In one embodiment of the present invention, the high content of the fly ash 202 in the composition 200 improves long-term strength and durability.
[0062] In one embodiment of the present invention, the pre-defined quantity of the fly ash 202 is 75 %.
[0063] The dolomite powder 204 and silica fume 206 as the packing agents 104 to consolidate micro-voids and improve compaction density of the composition 200. The dolomite powder 204 with its fine particles, aids in better packing and reduced voids to improve overall density of the composition 200. The silica fume 206 is a highly reactive material that improves the bond between the ingredients of the composition 200 to increase strength and durability.
[0064] In one embodiment of the present invention, the dolomite powder 204 and the silica fume 206 resist corrosion and reduce permeability of the composition 200.
[0065] In one embodiment of the present invention, the smaller size particles of the packing agents 104 offer better packing and reduce voids, ultimately improve the compactness in the composition 200.
[0066] In one embodiment of the present invention, the pre-defined quantity of the dolomite powder 204 is 5 %.
[0067] The cement 208 and the ground granulated blast furnace slag 210 as the binding agents 106 to cohesively bind the ingredients and enhance structural integrity. The cement 208 and the ground granulated blast furnace slag 210 enhances the strength and durability of the composition 200. the ground granulated blast furnace slag 210 contributes to the pozzolanic reaction, resulting in a denser and more durable composition 200.
[0068] In one embodiment of the present invention, the amount of the cement 208 directly affects the hydration process and strength development. A higher percentage of the ground granulated blast furnace slag 210 leads to lower carbon emissions and enhances long-term durability.
[0069] In one embodiment of the present invention, the pre-defined quantity of the cement 208 is 20 %.
[0070] The gravel 212 as the coarse aggregate 108 to enhance load bearing capacity. The gravel provides the structural skeleton for the composition 200 and helps improve its load-bearing capacity. Also, the proper selection and gradation of the gravel 212 ensures good workability, adequate strength, and resistance to cracking.
[0071] In one embodiment of the present invention, the size and quality of the gravel 212 influence the workability, strength, and durability of composition 200 as proper gradation of the coarse aggregate 108 ensures that the concrete flows easily without segregation.
[0072] The water 214 as the solvent 110 to facilitate dissolution and hydration of ingredients. The water 214 aids the hydration and forming a paste containing ingredients required for self-compaction. This helps the composition 200 flow and fill molds without external vibration. It also contributes to the workability and ease of handling during the mixing and casting process. The gypsum 216 as the flash setting inhibitor 114 to prevent premature setting of the composition 200. The gypsum 216 is used to prevent flash setting for easy handling of the composition 200.
[0073] In one embodiment of the present invention, the composition 200 further comprises sand 218 as the fine aggregate 114 in a pre-defined quantity to improve workability and reduce carbon emission.
[0074] In one embodiment of the present invention, the sand 218 as the fine aggregate 114 contributes to the structural integrity of the composition 200, and influences flowability, cohesion and stability of the self-compacting concrete.
[0075] In one embodiment of the present invention, the composition 200 further comprises polycarboxylate-based admixture 220 as the superplasticizer 116 to enable a low water-to-cement ratio within the composition 200.
[0076] In one embodiment of the present invention, the polycarboxylate-based admixture 220 as a superplasticizer 116 enhances flowability and reduces the water 214 demand.
[0077] FIG. 3 illustrates a flow-chart of a method, outlining the sequential steps for preparing a low carbon self-compacting concrete, in accordance with an embodiment of the present disclosure.
[0078] At step 302, blend the fly ash 202, the dolomite powder 204, the silica fume 206, the cement 208, and the ground granulated blast furnace slag 210 to obtain a homogeneous dry mixture.
[0079] At step 304, incorporate the fine aggregate 114 and the coarse aggregate 108 to the dry mixture with continuous agitation to ensure even distribution of the aggregates within the dry mixture.
[0080] At step 306, add the solvent 110 to the dry mixture with continuous stirring to form a paste owning homogeneous consistency.
[0081] At step 308, dissolve the superplasticiser 116 to the paste followed by adding the gypsum 216 to prevent flash setting.
[0082] At step 310, pour the paste into molds and allowing to cure for 24 hours.
[0083] At step 312, demold and immerse in the solvent 110 for 7–28 days to obtain low carbon self-compacting concrete.
[0084] In an exemplary embodiment of the present invention, to develop a low carbon self-compacting concrete composition 200, five different compositions 200 are prepared by varying the quantities of the fly ash 202, the dolomite powder 204 and the cement 208. The fly ash 202 is incorporated with varied amount of 60 %, 65 %, 70 %,75 % and 80 %. The dolomite powder 204 is incorporated with varied amount of 5 %, 10 %. The cement 208 is incorporated with varied amount of 15 %, 20 %, 25 %, and 30 %. Making different combinations out of these are labelled as M1, M2, M3, M4 and M5 are assessed for their compressive strength. Among the tested combinations, M1 combination with 75 % of the fly ash 202, 5 % of the dolomite powder 204, 20 % of the cement 208 gives the best strength and sustainability balance.
[0085] In an exemplary embodiment of the present invention, to develop a low carbon self-compacting concrete composition 200, five different compositions 200 are prepared by varying the quantities of the fly ash 202, the dolomite powder 204 and the cement 208. The fly ash 202 is incorporated with varied amount of 60 %, 65 %, 70 %,75 % and 80 %. The dolomite powder 204 is incorporated with varied amount of 5 %, 10 %. The cement 208 is incorporated with varied amount of 15 %, 20 %, 25 %, and 30 %. Making different combinations out of these are labelled as M1, M2, M3, M4 and M5 are assessed for their compressive strength. Among the tested combinations, M2 combination with 70 % of the fly ash 202, 10 % of the dolomite powder 204, 20 % of the cement 208 demonstrates modern improvement in the composition 200.
[0086] In an exemplary embodiment of the present invention, to develop a low carbon self-compacting concrete composition 200, five different compositions 200 are prepared by varying the quantities of the fly ash 202, the dolomite powder 204 and the cement 208. The fly ash 202 is incorporated with varied amount of 60 %, 65 %, 70 %,75 % and 80 %. The dolomite powder 204 is incorporated with varied amount of 5 %, 10 %. The cement 208 is incorporated with varied amount of 15 %, 20 %, 25 %, and 30 %. Making different combinations out of these are labelled as M1, M2, M3, M4 and M5 are assessed for their compressive strength. Among the tested combinations, M3 combination with 65 % of the fly ash 202, 10 % of the dolomite powder 204, 25 % of the cement 208 also demonstrates modern improvement in the composition 200.
[0087] In an exemplary embodiment of the present invention, to develop a low carbon self-compacting concrete composition 200, five different compositions 200 are prepared by varying the quantities of the fly ash 202, the dolomite powder 204 and the cement 208. The fly ash 202 is incorporated with varied amount of 60 %, 65 %, 70 %,75 % and 80 %. The dolomite powder 204 is incorporated with varied amount of 5 %, 10 %. The cement 208 is incorporated with varied amount of 15 %, 20 %, 25 %, and 30 %. Making different combinations out of these are labelled as M1, M2, M3, M4 and M5 are assessed for their compressive strength. Among the tested combinations, M4 combination with 60 % of the fly ash 202, 10 % of the dolomite powder 204, 30 % of the cement 208 demonstrates slight strength reduction in the composition 200.
[0088] In an exemplary embodiment of the present invention, to develop a low carbon self-compacting concrete composition 200, five different compositions 200 are prepared by varying the quantities of the fly ash 202, the dolomite powder 204 and the cement 208. The fly ash 202 is incorporated with varied amount of 60 %, 65 %, 70 %,75 % and 80 %. The dolomite powder 204 is incorporated with varied amount of 5 %, 10 %. The cement 208 is incorporated with varied amount of 15 %, 20 %, 25 %, and 30 %. Making different combinations out of these are labelled as M1, M2, M3, M4 and M5 are assessed for their compressive strength. Among the tested combinations, M5 combination with 80 % of the fly ash 202, 5 % of the dolomite powder 204, 15 % of the cement 208 maximizes sustainability but needs a strength enhancer in the composition 200.
[0089] The best mode of operation of the invention, the composition 200 and method 300 for preparing low-carbon self-compacting concrete involves preparing a homogeneous dry mixture of the fly ash 202, the dolomite powder 204, the silica fume 206, the cement 208, and the ground granulated blast furnace slag 210 through blending. The sand 218 and the gravel 212 are then incorporated into the dry mixture under continuous agitation to ensure uniform distribution. Next, the water 214 is added to the dry mixture while stirring continuously to form a consistent paste. The polycarboxylate-based admixture 220 is dissolved into the paste, followed by the addition of gypsum 216 to prevent flash setting and ensure workability. The paste is then poured into molds and allowed to set for 24 hours. After curing, the molded product is demolded and immersed in the water 214 for a period ranging from 7 to 28 days which results in the formation of durable low-carbon self-compacting concrete with enhanced strength.
[0090] While the invention has been described in connection with what is presently considered to be the most practical and various embodiments, it will be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims.
[0091] A person of ordinary skill in the art may be aware that, in combination with the examples described in the embodiments disclosed in this specification, units and algorithm steps may be implemented by electronic hardware, computer software, or a combination thereof.
[0092] The foregoing descriptions of specific embodiments of the present disclosure have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present disclosure to the precise forms disclosed, and many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described to best explain the principles of the present disclosure and its practical application, and to thereby enable others skilled in the art to best utilize the present disclosure and various embodiments with various modifications as are suited to the particular use contemplated. It is understood that various omissions and substitutions of equivalents are contemplated as circumstances may suggest or render expedient, but such omissions and substitutions are intended to cover the application or implementation without departing from the scope of the present disclosure.
[0093] Disjunctive language such as the phrase “at least one of X, Y, Z,” unless specifically stated otherwise, is otherwise understood with the context as used in general to present that an item, term, etc., may be either X, Y, or Z, or any combination thereof (e.g., X, Y, and/or Z). Thus, such disjunctive language is not generally intended to, and should not, imply that certain embodiments require at least one of X, at least one of Y, or at least one of Z to each be present.
[0094] In a case that no conflict occurs, the embodiments in the present disclosure and the features in the embodiments may be mutually combined. The foregoing descriptions are merely specific implementations of the present disclosure, but are not intended to limit the protection scope of the present disclosure. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in the present disclosure shall fall within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
, Claims:I/We Claim:
1. A composition (100) for a low carbon self-compacting concrete, the composition (100) comprising:
a pozzolanic additive (102) in a pre-defined quantity;
at-least two packing agents (104) in a pre-defined quantity;
at-least two binding agents (106) in a pre-defined quantity;
a coarse aggregate (108) in a pre-defined quantity;
a solvent (110) in a pre-defined quantity; and
a flash setting inhibitor (112) in a pre-defined quantity.
2. A low carbon self-compacting concrete composition (200), the composition (200) comprising:
fly ash (202) as the pozzolanic additive (102) to provide mechanical integrity and durability to the composition (200);
dolomite powder (204) and silica fume (206) as the packing agents (104) to consolidate micro-voids and improve compaction density of the composition (200);
cement (208) and ground granulated blast furnace slag (210) as the binding agents (106) to cohesively bind the ingredients and enhance structural integrity;
gravel (212) as the coarse aggregate (108) to enhance load bearing capacity;
water (214) as the solvent (110) to facilitate dissolution and hydration of ingredients; and
gypsum (216) as the flash setting inhibitor (114) to prevent premature setting of the composition (200).
3. The composition (200) as claimed in claim 2, wherein the composition (200) further comprises sand (218) as a fine aggregate (114) in a pre-defined quantity to improve workability and reduce carbon emission.
4. The composition (200) as claimed in claim 2, wherein the composition (200) further comprises polycarboxylate-based admixture (220) as a superplasticizer (116) to enable a low water-to-cement ratio within the composition (200).
5. The composition (200) as claimed in claim 2, wherein the pre-defined quantity of the fly ash (202) is 75 %.
6. The composition (200) as claimed in claim 2, wherein the pre-defined quantity of the dolomite powder (204) is 5 %.
7. The composition (200) as claimed in claim 2, wherein the pre-defined quantity of the cement (208) is 20 %.
8. The composition (200) as claimed in claim 2, wherein the fly ash (202) reduces the heat of hydration and minimize the risk of thermal cracking.
9. The composition (202) as claimed in claim 2, wherein the dolomite powder (204) and the silica fume (206) resist corrosion and reduce permeability of the composition (200).
10. A method (300) for preparing low carbon self-compacting concrete, the method (300) comprising:
blending the fly ash (202), the dolomite powder (204), the silica fume (206), the cement (208), and the ground granulated blast furnace slag (210) to obtain a homogeneous dry mixture;
incorporating the fine aggregate (114) and the coarse aggregate (108) to the dry mixture with continuous agitation to ensure even distribution of the aggregates within the dry mixture;
adding the solvent (110) to the dry mixture with continuous stirring to form a paste owning homogeneous consistency;
dissolving the superplasticiser (116) to the paste followed by adding the gypsum (216) to prevent flash setting;
pouring the paste into molds and allowing to cure for 24 hours; and
demolding and immersing in the solvent (110) for 7–28 days to obtain low carbon self-compacting concrete.