Description:BACKGROUND
Field of Invention
[001] Embodiments of the present invention generally relate to strengthening soil and particularly to a method for improving consistency limit of soil.
Description of Related Art
[002] Soil, scientifically known as vertisol, represents a unique soil type with distinctive characteristics that make it highly desirable for cotton cultivation, particularly regarding compressibility. This soil type is primarily found in tropical and subtropical regions across the globe. One of its notable attributes is its rich composition of essential nutrients such as calcium, carbonate, potash, lime, iron, and magnesium. However, it is important to note that vertisol typically exhibits lower levels of phosphorus, nitrogen, and organic matter. Fertility tends to be more pronounced in low-lying regions but diminishes in upland areas. The high clay composition of vertisol presents challenges for plant root system establishment and expansion, potentially leading to restricted growth and reduced crop yields, ultimately affecting compressibility.
[003] Existing methods aimed at enhancing soil compressibility have encountered limitations, particularly in terms of cost-effectiveness. Common approaches involve soil stabilization techniques, which often necessitate the addition of specific chemicals or extensive mechanical processes. However, these methods can contribute to soil pollution and may not be economically viable, especially for smaller-scale projects or regions with limited resources. Additionally, the curing and testing requirements associated with soil stabilization processes cause delays in construction schedules, rendering them less suitable for projects with tight timelines, ultimately affecting efforts to enhance compressibility.
[004] Furthermore, the use of stabilizers, especially chemical additives, raises environmental concerns by introducing non-environmentally friendly chemicals into the soil, potentially impacting compressibility. Some soils do not respond well to stabilization methods, leading to limited achievable improvements in compressibility. This limitation poses a significant drawback when dealing with particularly challenging soils, especially concerning efforts to enhance compressibility.
[005] There is thus a need for an improved and advanced a method for improving consistency limit of soil that can administer the abovementioned limitations in a more efficient manner.
SUMMARY
[006] Embodiments in accordance with the present invention provide a method for improving consistency limit of soil. The method comprising a step of: collecting raw soil from a source; mixing fillers selected from a polypropylene fiber in the collected soil in first proportionate amount of 0.1 percentage (%); mixing stabilizers selected from Ecosand, and Metakaolin in the collected soil in a second proportionate amount and a third proportionate amount; mixing the fillers and the stabilizers manually by mixing a controlled amount of water gradually to obtain a sample mixture; assessing a change in properties of the soil upon adding the water; and evaluating the consistency limit of the sample mixture based on the added amount of the water.
[007] Embodiments of the present invention may provide several advantages depending on configuration. First, embodiments of the present application may provide a method for improving consistency limit of soil.
[008] Next, embodiments of the present application may provide a method for improving consistency limit of soil that is easily reproducible.
[009] Next, embodiments of the present application may provide a method for improving consistency limit of soil that prevents soil degradation and promotes soil stability.
[0010] Next, embodiments of the present application may provide a method for improving consistency limit of soil that increases a compressive strength of the soil.
[0011] Next, embodiments of the present application may provide a method for improving consistency limit of soil that increases shear strength.
[0012] These and other advantages will be apparent from the present application of the embodiments described herein.
[0013] 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 by utilizing, alone or in combination, one or more of the features set forth above or described in detail below.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The above and still further features and advantages of embodiments of the present invention will become apparent upon consideration of the following detailed description of embodiments thereof, especially when taken in conjunction with the accompanying drawings, and wherein:
[0015] FIG. 1A depicts a reinforcing agent, according to an embodiment of the present invention;
[0016] FIG. 1B depicts stabilizers, according to an embodiment of the present invention;
[0017] FIG. 2 illustrates a block diagram of components used for improving consistency limit of soil, according to an embodiment of the present invention; and
[0018] FIG. 3 depicts a flowchart of a method for enhancing consistency limit of soil, according to an embodiment of the present invention.
[0019] The headings used herein are for organizational purposes only and are not meant to be used to limit the scope of the description or the claims. As used throughout this application, the word "may" is used in a permissive sense (i.e., meaning having the potential to), rather than the mandatory sense (i.e., meaning must). Similarly, the words “include”, “including”, and “includes” mean including but not limited to. To facilitate understanding, like reference numerals have been used, where possible, to designate like elements common to the figures. Optional portions of the figures may be illustrated using dashed or dotted lines, unless the context of usage indicates otherwise.
DETAILED DESCRIPTION
[0020] The following description includes the preferred best mode of one embodiment of the present invention. It will be clear from this description of the invention that the invention is not limited to these illustrated embodiments but that the invention also includes a variety of modifications and embodiments thereto. Therefore, the present description should be seen as illustrative and not limiting. While the invention is susceptible to various modifications and alternative constructions, it should be understood, that there is no intention to limit the invention to the specific form disclosed, but, on the contrary, the invention is to cover all modifications, alternative constructions, and equivalents falling within the scope of the invention as defined in the claims.
[0021] In any embodiment described herein, the open-ended terms "comprising", "comprises”, and the like (which are synonymous with "including", "having” and "characterized by") may be replaced by the respective partially closed phrases "consisting essentially of", “consists essentially of", and the like or the respective closed phrases "consisting of", "consists of”, the like.
[0022] As used herein, the singular forms “a”, “an”, and “the” designate both the singular and the plural, unless expressly stated to designate the singular only.
[0023] FIG. 1A depicts fillers 100, according to an embodiment of the present invention. The fillers 100 may be added to raw soil to enhance a structural integrity, a stability, and a consistency limit of the raw soil. In an embodiment of the present invention, the raw soil may be obtained from a source. In an embodiment of the present invention, the source to obtain the raw soil may be, but not limited to, a semi-arid region, a poor drainage area, a good drainage area, a wet area, a dry land, and so forth. Embodiments of the present invention are intended to include or otherwise cover any source from where the soil may be obtained, including known, related art, and/or later developed technologies. In an embodiment of the present invention, a type of the soil may be, but not limited to, a hardpan black cotton soil, a fertile black cotton soil, a saline black cotton soil, and so forth. Embodiments of the present invention are intended to include or otherwise cover any type of the soil, including known, related art, and/or later developed technologies.
[0024] The fillers 100 may be, but not limited to a polypropylene fiber. In an embodiment of the present invention, a type of the polypropylene fiber may be, but not limited to, an isotactic polypropylene, a syndiotactic polypropylene, an atactic polypropylene, a blend of polypropylene with other polymers, a modified polypropylene, and so forth. Embodiments of the present invention are intended to include or otherwise cover any type the polypropylene fiber, including known, related art, and/or later developed technologies.
[0025] In an embodiment of the present invention, the fillers 100 may be added in the raw soil in a first proportionate amount rangings from 0.1 percentage (%) to 0.2 percentage (%). In an exemplary embodiment of the present invention, two soil samples may be prepared by mixing 0.1% and 0.2% of the fillers 100, respectively.
[0026] FIG. 1B depicts stabilizers 102, according to embodiments of the present invention. The stabilizers 102 may be selected from Ecosand, and Metakaolin. In an embodiment of the present invention, the Ecosand may be added to the collected soil in a second proportionate amount. In a preferred embodiment of the present invention, the second proportionate amount of the Ecosand may be 10%. In an embodiment of the present invention, the Metakaolin may be added to the collected soil in a third proportionate amount. In a preferred embodiment of the present invention, the third proportionate amount of the Metakaolin may be 5%.
[0027] In an embodiment of the present invention, a sample mixture may be prepared by mixing the fillers 100, the stabilizers 102, and a controlled amount of water. Dimensions of the sample mixture may be 38 millimeter (mm) diameter and a height 76 millimeter (mm), in an embodiment of the present invention. Embodiments of the present invention are intended to include or otherwise cover any dimensions of the sample mixture.
[0028] FIG. 2 illustrates a block diagram of components 200 used for improving the tensile strength of the soil, according to an embodiment of the present invention. The components 200 used to improve and evaluate the tensile strength of the soil may be, a mould 202, a mixing apparatus 204, a curing apparatus 206, and a sensor 208.
[0029] According to an embodiment of the present invention, the mould 202 may be configured to conduct a split tensile strength test of the soil mixed with the variable proportions of the fillers 100 and the stabilizers 102. In an embodiment of the present invention, the split tensile strength test may determine a dry density and a moisture content of the soil. In an embodiment of the present invention, the dry density and the moisture content of the soil may be determined to establish a baseline for subsequent improvements in the tensile strength of the black cotton soil. In an embodiment of the present invention, an internal diameter of the mould 202 may be in a range of 8 centimeter (cm) diameter to 15 cm. In a preferred embodiment of the present invention, a compaction test may be conducted using the mould 202 with an internal diameter of 38 millimeter (mm) diameter and a height 76 millimeter (mm).
[0030] In an embodiment of the present invention, the mould 202 used for compaction may be cleaned and prepared to prevent contamination and maintain an integrity of the compacted soil during testing. In an embodiment of the present invention, the mould 202 may be, but not limited to, a two-plate mould, a three-plate mould, a multilevel injection mould, and so forth. Embodiments of the present invention are intended to include or otherwise cover any type of the mould 202, including known, related art, and/or later developed technologies.
[0031] In an embodiment of the present invention, the mixing apparatus 204 may be configured to mix the variable proportions of the fillers 100 and the stabilizers 102 with the compacted soil. In an embodiment of the present invention, the mixing apparatus 204 may be, a hand blender, a mixer, a stirrer, a spoon, and so forth. Embodiments of the present invention are intended to include or otherwise cover any type of the mixing apparatus 204, including known, related art, and/or later developed technologies.
[0032] In an embodiment of the present invention, the mixing of the variable proportions of the fillers 100 and the stabilizers 102 with the compacted soil may be conducted using methods such as, but not limited to, a hand mixing pattern, a machine based mixing, a blending mixing pattern, a conventional missing pattern, and so forth. In a preferred embodiment of the present invention, the mixing method is a normal hand mixing. In an embodiment of the present invention, the normal hand mixing of the fillers 100 and the stabilizers 102 with the compacted soil involves mechanical agitation to uniformly distribute the fillers 100 and the stabilizers 102 throughout the soil. Embodiments of the present invention are intended to include or otherwise cover any type of the methods used for the mixing, including known, related art, and/or later developed technologies.
[0033] According to an embodiment of the present invention, the curing apparatus 206 may be configured to allow the sample mixture to cure for a specified curing duration. The sample mixture may be subjected to the curing apparatus 206 to allow the sample mixture to cure for the specified curing duration before the compaction test.
[0034] In an embodiment of the present invention, the specified curing duration may be in a range from 24 hours to 48 hours. In an embodiment of the present invention, the curing may be allowed at an ambient temperature for optimal interaction between the fillers 100, the stabilizers 102 and the raw soil. In an embodiment of the present invention, the curing apparatus 206 may be, but not limited to, a curing chamber, a container, a plate, and so forth. Embodiments of the present invention are intended to include or otherwise cover any type of the curing apparatus 206, including known, related art, and/or later developed technologies.
[0035] According to an embodiment of the present invention, the sensor 208 may be configured to detect the moisture content of the sample mixture upon adding the controlled amount of the water in the soil sample. Embodiments of the present invention are intended to include or otherwise cover any type of the sensor 208, including known, related art, and/or later developed technologies. The consistency limit may be evaluated by examining the change in the properties in relation to the state of plasticity to the state of elasticity upon adding the water using a first formula (F1) for a liquid limit (LL). In an embodiment of the present invention, the state may observed using a device called a Casagrande cup (not shown). The liquid limit can be calculated using athefirst formula (F1):
[0036] LL = W1 - W2 ------------------------------- (F1)
[0037] Where, “LL” may represents the Liquid Limit. “W1” may represents the water content when the soil begins to flow and show plastic properties. “W2” may represents the Initial water content of the raw soil. The formula (F1) may help in quantifying the water content at which the transition from plastic to liquid behavior occurs. The difference between the liquid limit (LL) and the plastic limit (PL) is called the plasticity index (PI) that may be calculated by formula (F2):
[0038] PI = LL – PL …………………… (F2)
[0039] These formulas may be used to assess the consistency limit of soil and provide valuable information about its engineering properties.
[0040] FIG. 3 depicts a flowchart of a method 300 for improving the consistency limit of soil.
[0041] At step 302, the raw soil is collected from the source. The raw soil may be sieved to remove larger particles.
[0042] At step 304, the collected soil may be added with the fillers (100) in the first proportionate amount range from 0.1 percentage (%) to 0.2 percentage (%).
[0043] At step 306, the collected soil may be added with the stabilizers 102 selected from Ecosand, and Metakaolin in a second proportionate amount and a third proportionate amount.
[0044] At step 308, the collected soil may be mixed with the fillers 100 and the stabilizers 102 manually by adding the controlled amount of water gradually to obtain a sample mixture.
[0045] At step 310, the sample mixture may be assessed for a change in properties of the soil upon adding the water. The change in the properties may be observed based on transitioning of the sample mixture from a state of plasticity to the state of elasticity.
[0046] At step 312, the consistency limit of the sample mixture is evaluated based on the added amount of the water.
[0047] While the invention has been described in connection with what is presently considered to be the most practical and various embodiments, it is to 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.
[0048] This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined in the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements within substantial differences from the literal languages of the claims. , Claims:CLAIMS
I/We Claim:
1. A method (300) for improving consistency limit of soil, the method (300) comprising steps characterized by:
collecting raw soil from a source;
mixing fillers (100) selected from a polypropylene fiber in the collected soil in a first proportionate amount of 0.1 percentage (%);
mixing stabilizers (102) selected from Ecosand, and Metakaolin in the collected soil in a second proportionate amount and a third proportionate amount;
mixing the fillers (100) and the stabilizers (102) manually by mixing a controlled amount of water gradually to obtain a sample mixture;
assessing a change in properties of the soil upon adding the water; and
evaluating the consistency limit of the sample mixture based on the added amount of the water.
2. The method (300) as claimed in claim 1, wherein the raw soil is Black Cotton soil.
3. The method (300) as claimed in claim 1, wherein the second proportionate amount of the Ecosand may be 10%.
4. The method (300) as claimed in claim 1, wherein the third proportionate amount of the Metakaolin may be 5%.
5. The method (300) as claimed in claim 1, wherein dimensions of the sample mixture are 38 millimeter (mm) diameter and a height 76 millimeter (mm).
6. The method (300) as claimed in claim 1, wherein the fillers (100) are added to the raw soil through a normal hand mixing.
7. The method (300) as claimed in claim 1, wherein the stabilizers (102) are added to the raw soil through a normal hand mixing.
8. The method (300) as claimed in claim 1, wherein the sample mixture is subjected to a curing apparatus (206) to allow the sample mixture to cure for a specified curing duration before the compaction test.
Date: November 20, 2023
Place: Noida

Dr. Keerti Gupta
Agent for the Applicant
(IN/PA-1529)