RBI Grade Research Articles

Economic and Environmental Assessment of RBI Grade 81-Stabilized and Polyester Fibre-Reinforced Soil Subgrades: A Comparative Study of Experimental and Theoretical Approaches

Economic and Environmental Assessment of RBI Grade 81-Stabilized and Polyester Fibre-Reinforced Soil Subgrades: A Comparative Study of Experimental and Theoretical Approaches

Geo-Engineering Properties Improvement of Clayey Soil with RBI Grade 81, Wood Ash and Silica Gel

Geo-Engineering Properties Improvement of Clayey Soil with RBI Grade 81, Wood Ash and Silica Gel

An Experimental Investigation on Shear Strength Behaviour of Unsaturated Clays on Effect of Spent Bleaching Earth and Misspend Cement

Abstract: In any kind of structure, expansive clay is a major cause of undulations. Numerous structures suffer damage and serious problems as a result of expansive soil swelling. The viability and environmental suitability of waste materials are the subject of extensive research by numerous research organizations. Waste products from the cement warehouse and oil industry include wasted bleaching earth and misspend cement. It is the best method to use in expansive soils to avoid issues with dumping and storage. Unconfined compressive strength and tri-axial compressive strength were used to identify a stabilization process. Any structure's stability depends on the strength of the underground soil on which it is built. All of a structure's loads are basically transferred to the ground directly. There are a variety of failures that can occur if the underlying soil is not stable enough to support transferred loads, including structure settlement, cracks, and so on. Soil improvement is necessary to solve this problem because it reduces the risk of structural damage in the future and reduces construction costs. To make ordinary soil stable enough to support the structural loads, a variety of improvements can be made. In this study, both regular and stabilized soil can be used in a number of tests. This paper explains the strength behavior of SBE treated black cotton soil reinforced with MC. The various percentage of SBE as 5%, 10%, 15%, 20% and 25% was used to find out the optimum value of RBI Grade. MC has been randomly included into the SBE treated soil at four different percentages of MC content, i.e. 2%, 4%, 6%, 8% and 10%.

Kaolinite subgrade strength characteristics variation with RBI Grade 81

The shrinking behaviour of clay soil due to moisture variation causes damage to the foundation of structures, residential, commercial structures and embankment construction. To overcome this problem, the soil needs to be treated to improve its strength and durability of the ground. The best technique is stabilization, which enhances the engineering soil properties, upgrades the shear strength, and reduces the consistency limit. In this present study, Kaolinite clayey subgrade soil is stabilized using Road Building International Grade 81 (RBI), and its effects on the strength characteristics of the soil are studied. Compaction characteristics, Atterberg's limits, Unconfined Compression Strength tests (UCS), and Split Tensile Strength (STS) on the soil samples were performed. The same composites are studied for SEM and XRD results to confirm the morphology of the new compounds formed. Compaction factors increased optimum moisture content (OMC), and the maximum dry density (MDD) decreased with RBI Grade 81 to kaolinite. UCS values increased significantly for the clayey subgrade with the addition of RBI Grade 81. RBI Grade 81 at 8% shows an enhanced upgrade in the clay subgrade's strength compared with the natural kaolinite subgrade. Hence, RBI Grade 81 can be recommended as a potential soil stabilizing agent, particularly for clayey subgrade soil.

Stabilization of Black Cotton Soil Using RBI Grade 81 and Sodium Silicate

Abstract: Nearly 51.8 million hectares of land area in India is covered with expansive soils (mainly Black Cotton soil). The property of the expansive soils, in general, is that they are very hard when in dry state, but they lose all of their strength when in wet state. In light of this property of expansive soils, these soils pose problems worldwide that serve as challenge to overcome for the Geotechnical Engineers. One of the most important aspects for construction purpose issoil stabilization, which is used widely in foundation and road pavement constructions; this is because such a stabilization regime improves engineering properties of the soil, such as volume stability, strength and durability. In this process, removal or replacing of the problematic soil is done; replacement is done by a better quality material, or the soil is treatedwith additives. In the present study, RBI Grade 81 obtained from Alchemist Touchnology Limited, Gurgaon, Haryana and Sodium Silicate solution 5mol/Liter obtained from Organ Refractories, Khammam, Telangana are used for the stabilization of black cotton soil. These additives are added in various proportions

Effect of RBI Grade 81 on Strength Characteristics of Expansive Soil

Expansive soils, which are generally termed as problematic soils, cause swelling and shrinkage resulting in significant damage to the structures constructed on them. In this study, an attempt is made to know the effect of Road Building International Grade 81 (RBI Grade 81) on strength characteristics of expansive soil. RBI Grade 81 has a wide range of response spectrum. Response spectrum is the range of soils for which a particular stabilizer can be used. A wide range of tests, such as Atterberg limits, compaction, unconfined compressive strength, and California bearing ratio, were conducted on expansive soil and expansive soil treated with various percentages of RBI Grade 81. The results indicate that RBI Grade 81 is effective in improving engineering properties of expansive soil.

Stabilization of Black Cotton Soil using RBI Grade 81 and Flyash

Stabilization of Black Cotton Soil using RBI Grade 81 and Flyash

Assessment of Black Cotton Soil by Use of Ceramic Dust, RBI Grade 81 and Lime

Assessment of Black Cotton Soil by Use of Ceramic Dust, RBI Grade 81 and Lime

The Comparative Study of Fly Ash & RBI Grade 81 on Lateritic Soil

The Comparative Study of Fly Ash & RBI Grade 81 on Lateritic Soil

Influence of Spent Bleaching Earth and Misspend Cement on Shear Strength Behaviour of Unsaturated Clays

Expansive clay is a major source of undulations induced in any type of structures. Swelling of expansive soils causes serious problems and produces harm to many structures. Many research organizations are doing extensive work on waste materials concerning the viability and environmental suitability. Spent bleaching earth and misspend cement are waste derivatives from oil industry and cement warehouse. To avoid dumping problem and storage problems, it is the best method technique applied in expansive soils. Attempts are made to investigate the stabilization process identified in unconfined compressive strength and tri-axial compressive strength.Stability of any structure depends on strength properties of underground soil on which it is constructed. Structures basically transfer all the loads come on itself directly to the ground. If the underlying soil is not stable enough to support transferred loads then various types of failure occur such as settlement of the structure, cracks and so on. To solve this issue, soil improvement is necessary because it not only lowers the construction cost but also cuts the risk of any damage of structure later on. Numerous improvement methods can be adopted to make ordinary soil stable enough to support the structural loads. In this research work a number of tests may conduct using both ordinary soil and stabilised soil. This thesis explains the strength behavior of SBE treated black cotton soil reinforced with MC. The various percentage of SBE as 5%, 10%, 15%, 20% and 25% was used to find out the optimum value of RBI Grade. MC has been randomly included into the SBE treated soil at four different percentages of MC content, i.e. 2%, 4%, 6%, 8% and 10%.

Attentive Study on Strength Characteristics of Expansive Soils on Subgrade of Express Highways by utilisation of RBI Grade-81 and Local Polymers

Chemical stabilization is one of the oldest methods of stabilization of problematic soil. In recent days, it has been investigated that addition of fibers will improve the ductility behavior of the soil there by reducing the development of crack during shrinkage. Extensive study has been carried out on the stabilization of expansive soils using various additives such as RBI, cement, flyash, industrial waste products etc., and also with random inclusion of fibers such as coir, sisal, polyester fibers etc. Randomly oriented tensile inclusions incorporated into soil to improve its load–deformation behaviour by interacting with the soil particles mechanically through surface friction and Effect of Random Inclusion of Coir Fibers on Strength Behaviour of RBI Treated Black Cotton Soil. This project describes the strength behavior of treated black cotton soil (BC soil) reinforced with local fiber. The various percentage of RBI Grade-81 as 2%, 4%, 6% and 8% was used to find out the optimum value of RBI Grade. local polymer has been randomly included into the RBI Grade treated soil at four different percentages of local fiber content, i.e. 0.5%, 1% 1.5%, and 2% (by weight of soil).

A Review on Stabilization of Black Cotton Soil Using RBI Grade 81, Lime, Rice Husk Ash and Foundry Sand

A Review on Stabilization of Black Cotton Soil Using RBI Grade 81, Lime, Rice Husk Ash and Foundry Sand

Clay’s Properties Improvement with RBI Grade 81 and Brick Kiln Dust

Clay’s Properties Improvement with RBI Grade 81 and Brick Kiln Dust

Effect of RBI Grade 81 on strength characteristics of clayey subgrade

The present study deals with the effect of Road Building International Grade 81 (RBI Grade 81) on strength characteristics of the clayey subgrade. A wide range of tests was conducted on various percentages of RBI Grade 81 subgrade mixtures such as Atterberg limits, compaction characteristics, California Bearing Ratio (CBR) and Unconfined Compression Strength tests (UCS). It can be noticed that the CBR of clayey subgrade has increased significantly with the addition of RBI Grade 81. Similarly, the maximum dry density (MDD) has decreased and the optimum moisture content (OMC) has increased with RBI Grade 81 addition to subgrade. The strength of clay subgrade at 8% of RBI Grade 81 has improved 3–3.5 times as compared to the natural clayey subgrade. Overall, it can be concluded that RBI Grade 81 is suggested as a potential stabilizing agent especially for clayey subgrades.

Laboratory study on subgrade soil stabilization using RBI grade 81

The present study investigates the effect of reinforcing the sub grade soils with RBI 81 material. A soil nearby was collected and preliminary tests were conducted to classify the soil and it was found from the results that the sample collected was a poorly graded clay. Subsequently Tests such as Proctor Compaction, CBR, and UCC were conducted to study the various engineering properties of the identified soil. In addition to the above tests were also conducted on the soil by reinforcing with varying percentages of RBI 81. From the analysis of test results it was found that this material (RBI 81) will significantly improve the CBR value of the soil.

SUITABILITY OF RED MUD IN SUBGRADE USING RBI GRADE 81

The waste generated by aluminum industry is known as bauxite residue or red mud. By nature, the red mud is toxic which creates problem for disposal. Due to the alkaline nature it is unsuitable for construction and vegetation. Every year more or less 75 million tons of red mud is generated worldwide. RBI grade 81 is a powdered cementitious stabilizer. It improves the engineering properties of several types of soils. This paper presents investigation carried out for better understanding on effect of RBI Grade 81 on red mud properties to be used in subgrades. It is found that with optimum dose of RBI grade 81 as 4%, liquid limit decreases and plastic limit increase. MDD values decrease slightly but the CBR value of the red mud increase with addition of RBI grade 81.

Carbon Footprints Assessment of RBI Grade 81 Stabilized Pavements using Life-Cycle Approach

Objectives: To reduce the life-cycle carbon footprint of a flexible pavement using RBI grade 81, a patented natural soil stabilizer. Methods: This paper outlines the common guidelines for estimation of greenhouse gas emissions associated with a pavement as per the Indian environmental conditions. California Bearing Ratio (CBR) tests were carried out on subgrade soil treated with diverse proportions of RBI grade 81. Greenhouse gas emissions due to the initial construction phase and maintenance activities over a 20 year life cycle were assessed and compared for RBI grade 81 treated and non-treated subgrades. Key sources of carbon footprint considered were construction materials and transportation with construction equipments having negligible contribution. Findings: Studies reveal significant improvement in the CBR of the subgrade soil leading to reduction of pavement layer thicknesses thereby limiting the requirements of resources that is to say materials, fuel and machinery. The total CO 2 emissions were reduced from 910.9 tonnes to 750.8 tonnes per km length of a four lane dual carriageway road by treating the subgrade soil with 4% RBI grade 81. The production of materials and transportation used to construct the project account for 93% and 7% of the total CO 2 emissions throughout the life cycle of the pavement. Improvements: Use of RBI grade 81 results in attenuation of greenhouse gas emissions which were found consequential in amassing of carbon credits, a step towards safeguarding the environment for the future generations to come.

Evaluation of RBI Grade 81 for Stabilization of Expansive Soil as Sub-grade Material

Most of the area in Southern part of Gujarat state and about one-third area of India are covered by the expansive soil popularly known as black cotton soil have high clay contents. To utilize this expansive soil in an effective way, proper treatment is required to improve the behavior of this soil as sub-grade. In the present study, an attempt is made to modify the engineering properties of the expansive soil available in SVNIT campus of Surat city, Gujarat by stabilizing it with RBI Grade 81. The effect of adding this chemical stabilizer in expansive soil are characterized through various laboratory tests to determine Consistency Limits, Compaction Characteristics, Free Swell Index, Unconfined Compressive Strength, and California Bearing Ratio. The laboratory investigations indicate that RBI Grade 81 with up to 5% optimizes the engineering properties of expansive soil to be used as sub-grade.

A Study on Soil Stabilization Using Rbi Grade 81

A Study on Soil Stabilization Using Rbi Grade 81

Effectiveness Study of RBI81 in Stabilisation of Soil

Background/Objectives: Problematic soils cause more damage to structures which are resting over it due to less strength to support the loads acting on them during the construction as well as in service periods. A proper treatment of the subgrade soil is required for providing a stable working area for the construction of structures. In geotechnical point of view, soil stabilization with suitable admixtures fulfils the improvement in the soil characteristics for construction of foundation for light structures and pavements. Methods/Statistical Analysis: In this study an attempt is made to analyse the effect of soil stabiliser RBI grade 81 on two different soils treated with varying percentages of admixture for different curing periods. The strength properties are studied by conducting the UCC and CBR test for treated soils with 2%, 4% and 6% of RBI for specific curing of 7, 28 and 60 days. Microstuctural studies by Scanning electron microscopy had done on untreated and treated soils shows the relevant structural changes which promotes the strength attainment with the addition of admixtures while curing period increases. Findings: This study shows a substantial improvement in problematic soils by treated with RBI grade 81 shows the increasing value of UCC ranging from 1.5 to 11 times and California Bearing Ratio values shows an increase of 65% and 41% from 2% and 2.19% for the both the soils with the addition of 6% RBI additives at the curing period of 60 days. Improvement/Applications: Use of RBI 81 in soil stabilisation renders a better stabilizing agent making the soils capable of meeting the constructional requirements with improved engineering properties.