Description:BACKGROUND
Field of Invention
[001] Embodiments of the present invention generally relate to strengthening soil and particularly to a method for analysing effects of curing conditions on soil using a design of experiment approach.
Description of Related Art
[002] There is currently a shortage of suitable soil materials in the construction industry that can adequately support the superstructure. Engineers are addressing this challenge by exploring various foundation types and ground improvement techniques. Among these, soil stabilization stands out as a highly adaptable method.
[003] Additionally, the construction site will experience diverse climatic conditions, including rain, extreme heat, and cold. Therefore, it is crucial to tailor the curing process to suit the specific local climatic conditions at the site. During the rainy season, runoff will occur, while the summer heat can cause rapid drying and subsequent cracking. Moreover, extreme cold conditions can lead to freezing problems.
[004] Considering the aforementioned climatic effects, it is imperative to thoroughly investigate soil stabilization using different combinations of admixtures under varying curing conditions.
[005] There is thus a need for an improved method for analysing effects of curing conditions on 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 analysing effects of curing conditions on soil using a design of experiments (DOE) approach. The method comprising a step of: designing a set of variable proportions ranging from 0.5% to 3% of a plant-based additive using the Design of Experiments (DOE) approach; mixing the raw soil with the designed variable proportions of the plant-based additive selected from a lignosulphonate; conducting an unconfined compaction test for each of the variable proportions of the soil mixed with the plant-based additive; dividing the soil mixed with the plant-based additive in three samples and curing the three samples at three curing conditions selected from an Open air curing, a covered curing and curing with a desiccator; conducting unconfined compression tests for the three samples; and plotting Stress-Strain curves for the three curing conditions.
[007] Embodiments of the present invention may provide several advantages depending on configuration. First, embodiments of the present application may provide a method for enhancing soil density.
[008] Next, embodiments of the present application may provide a method for analysing effects of curing conditions on soil that is easily reproducible.
[009] Next, embodiments of the present application may provide a method for analysing effects of curing conditions on soil that prevents soil degradation and promotes soil stability.
[0010] Next, embodiments of the present application may provide a method for analysing effects of curing conditions on soil that increases a compressive strength of the soil.
[0011] Next, embodiments of the present application may provide a method for analysing effects of curing conditions on soil that increases a 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. 1 depicts a plant-based additive, according to an embodiment of the present invention;
[0016] FIG. 2 illustrates a block diagram of components used for enhancing soil density, according to an embodiment of the present invention; and
[0017] FIG. 3 depicts a flowchart of a method for analysing effects of curing conditions on soil using the plant-based additive, according to an embodiment of the present invention.
[0018] 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
[0019] 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.
[0020] 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.
[0021] 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.
[0022] FIG. 1 depicts a plant-based additive 100, according to an embodiment of the present invention. The plant-based additive 100 may be a Lignosulphonate. In an embodiment of the present invention, a type of the Lignosulphonate may be, but not limited to, a sodium lignosulfonate, a magnesium lignosulfonate, a calcium lignosulfonate, an ammonium lignosulfonate, and so forth. Embodiments of the present invention are intended to include or otherwise cover any type the Lignosulphonate, including known, related art, and/or later developed technologies.
[0023] In an embodiment of the present invention, the Lignosulphonate may be derived from a plant source. In another embodiment of the present invention, the Lignosulphonate may be derived using methods such as but not limited to, a traditional sulfite pulping, a modified sulfite pulping, and so forth. Embodiments of the present invention are intended to include or otherwise cover any type of the method used to obtain the Lignosulphonate, including known, related art, and/or later developed technologies.
[0024] In an embodiment of the present invention, the Lignosulphonate may be utilized in a form such as, but not limited to, a powder, granules, a liquid solution, a semi liquid solution, and so forth. Embodiments of the present invention are intended to include or otherwise cover any form of the Lignosulphonate, including known, related art, and/or later developed technologies.
[0025] In an embodiment of the present invention, the Lignosulphonate may be added and mixed in variable proportions in raw soil. In an embodiment of the present invention, a set of the variable proportions of the plant-based additive 100 may be designed using a design of experiments (DOE) approach. In an embodiment of the present invention, the addition of Lignosulphonate to the raw soil may be optimized through the systematic Design of Experiments (DOE) approach. In this approach, the selection of distinct proportions may be ranging from 0.5% to 3%. The design of experiments (DOE) approach may involve determining an optimum percentage of the plant-based additive 100 based on achieving a maximum soil density with the least moisture content. The DOE approach may further guide an assignment of these proportions into experimental runs, ensuring a comprehensive exploration of the additive's effects on the soil. By conducting controlled experiments, accurately measuring outcomes like soil density and moisture content, and employing statistical analyses, the impact of the variable proportions of the Lignosulphonate on soil characteristics may be thoroughly assessed.
[0026] The variable proportions of the Lignosulphonate may be in a range of 0.5 percentage (%) to 5 percentage (%) of the proportionate amount of dry weight of the soil, in an embodiment of the present invention. In a preferred embodiment of the present invention, the proportion of the Lignosulphonate may be 5%.
[0027] In an embodiment of the present invention, the raw soil may be obtained in a proportionate amount. In an embodiment of the present invention, the sample of the soil may be obtained from a specified source. In an embodiment of the present invention, the specified source to obtain the 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.
[0028] FIG. 2 illustrates a block diagram of components 200 used for enhancing the soil density, according to an embodiment of the present invention. The components 200 used to improve and evaluate the 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 an unconfined compaction test of the soil mixed with the variable proportions of the Lignosulphonate. In an embodiment of the present invention, the unconfined compaction 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 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 the internal diameter of 10.2 cm and a height of 11.6 cm.
[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 Lignosulphonate 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 Lignosulphonate 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 Lignosulphonate with the compacted soil involves mechanical agitation to uniformly distribute the Lignosulphonate 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 mixed soil and the Lignosulphonate to cure for a specified curing duration. The soil mixed with the Lignosulphonate may be subjected to the curing apparatus 206 to allow the soil mixed with the Lignosulphonate 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 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 Lignosulphonate 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 soil mixed with the Lignosulphonate. 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.
[0036] FIG. 3 depicts a flowchart of a method 300 for analysing the effects of curing conditions on the soil using the design of experiments (DOE) approach.
[0037] At step 302, the set of the variable proportions ranging from 0.5% to 3% of the plant-based additive 100 may be designed using the design of experiments (DOE) approach.
[0038] At step 304, the raw soil may be mixed with the designed variable proportions of the plant-based additive 100.
[0039] At step 306, the unconfined compaction test for each of the variable proportions of the soil may be mixed with the plant-based additive 100;
[0040] At step 308, the soil mixed with the plant-based additive 100 may be divided into three samples and the three samples may be cured at three curing conditions that may be, but not limited to, an open air curing, a covered curing, and curing with a desiccator.
[0041] At step 310, the three samples may be undergone to unconfined compression tests.
[0042] At step 312, stress-strain curves may be plotted for the three curing conditions. By plotting stress (s) on a y-axis and strain (e) on a x-axis, critical mechanical properties of the raw soil, such as a yield strength, an ultimate tensile strength, a ductility, and a toughness may be determined, according to the embodiment of the present invention.
[0043] 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.
[0044] 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 analysing effects of curing conditions on soil using a design of experiments (DOE) approach, the method (300) comprising steps characterized by:
designing a set of variable proportions of a plant-based additive (100) using the design of experiments (DOE) approach;
mixing the raw soil with the designed variable proportions of the plant-based additive (100);
conducting an unconfined compaction test for each of the variable proportions of the soil mixed with the plant-based additive (100);
dividing the soil mixed with the plant-based additive (100) in three samples and curing the three samples at three curing conditions selected from an open air curing, a covered curing, and curing with a desiccator;
conducting unconfined compression tests for the three samples; and
plotting Stress-Strain curves for the three curing conditions.
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 unconfined compaction test is conducted using a mold (202) with an internal diameter of 10.2 centimeters (cm) and a height of 11.6 centimeters (cm).
4. The method (300) as claimed in claim 1, wherein the plant-based additive (100) is added to the raw soil through normal hand mixing.
5. The method (300) as claimed in claim 1, wherein the optimal proportion of the plant-based additive (100) is determined based on achieving maximum soil density.
6. The method (300) as claimed in claim 1, wherein the raw soil is mixed with the plant-based additive (100) using a mixing apparatus (204).
7. The method (300) as claimed in claim 1, wherein the soil mixed with the plant-based additive (100) is subjected to a curing apparatus (206) to allow the soil mixed with the plant-based additive (100) to cure for a specified duration before the compaction test.
8. The method (300) as claimed in claim 1, wherein the design of experiments (DOE) approach involves determining an optimum percentage of the plant-based additive (100) based on achieving a maximum soil density with a least moisture content.

Date: October 26, 2023
Place: Noida

Nainsi Rastogi
Patent Agent (IN/PA-2372)
Agent for the Applicant