scholarly journals The effect of cement stabilization on the strength of the Bawen’s siltstone

2018 ◽  
Vol 195 ◽  
pp. 03012
Author(s):  
Edi Hartono ◽  
Sri Prabandiyani Retno Wardani ◽  
Agus Setyo Muntohar
Keyword(s):  
Moisture Content ◽  
Laboratory Test ◽  
Cement Content ◽  
Unconfined Compression Strength ◽  
Unconfined Compression ◽  
Toll Road ◽  
Cbr Test ◽  
Problematic Soils ◽  
Dry Soil ◽  
Cement Stabilization

Siltstones are predominantly found along the Bawen toll-road. Siltstone is degradable soil due to weather session. The soil is susceptible to the drying and wetting and the changes in moisture content. Thus, Siltstone is problematic soils in its bearing capacity when served as a subgrade or subbase. The main objective of this study was to investigate the effect of cement stabilization on the strength of Siltstone. The primary laboratory test to evaluate the strength was Unconfined Compression Strength (UCS) and California Bearing Ratio (CBR). The cement content was varied from 2 to 12 per cent by weight of the dry soil. The soils were collected from the Ungaran - Bawen toll road. The specimens were tested after seven days of moist-curing in controlled temperature room of 25°C. The CBR test was performed after soaking under water for four days to observe the swelling. The results show that the mudstones were less swelling after soaking. Cement-stabilized siltstone increased the CBR value and the UCS significantly. The addition of optimum cement content for siltstone stabilization was about 7 to 10 per cent.

Study on the Optimum Moisture of Cement-Solidified Sea Silt Road Embankment Adding Phosphate Tailing

2011 ◽  
Vol 368-373 ◽  
pp. 823-828
Author(s):  
Xiao Qing Zhao ◽  
Yao Dong Sun ◽  
Yong Hong Zhang
Keyword(s):  
Moisture Content ◽  
Cement Content ◽  
Design Method ◽  
Influence Factors ◽  
Optimum Moisture Content ◽  
Unconfined Compression Strength ◽  
Unconfined Compression ◽  
Cement Concrete ◽  
Compaction Test ◽  
Experimental Design Method

The effect of moisture content on the density and the strength of cement-solidified sea silt road embankment adding phosphate tailing was investigated. The optimum solidifying time was determined based on uniform experimental design method considering the factors of cement content and phosphate tailing content at 5 design levels. The different mix proportions were defined. Utilizing compaction test and unconfined compression strength test, referencing to the fluidity experiment of cement concrete, the optimum moisture content is studied on the basis of theories and tests. The influence factors about the optimum moisture content are discussed.

scholarly journals Strength benefit of sawdust/wood ash amendment in cement stabilization of an expansive soil

2019 ◽  
Vol 28 (50) ◽  
pp. 44-61 ◽  
Author(s):  
Jijo James
Keyword(s):  
Expansive Soil ◽  
Experimental Program ◽  
Unconfined Compression Strength ◽  
Strength Gain ◽  
Unconfined Compression ◽  
Saw Dust ◽  
Strength Based ◽  
Cement Stabilization ◽  
Early Strength ◽  
Pavement Thickness

The investigation evaluated the strength benefits obtained by amending cement stabilization of an expansive soil by using saw dust ash (SDA), a waste generated in wood milling industries due to burning. The experimental program involved the preparation of cylindrical specimens of size 38 mm x 76mm for evaluating the unconfined compression strength (UCS) of the cement stabilized and amended samples cured for varying periods of 2 hours, 7, 14 and 28 days. Two cement contents of 2% and 6% by weight of soil were adopted to stabilize the soil. The SDA amended cement stabilized samples adopted SDA contents of 5%, 10% and 20% by weight of soil. Strength gain trends for the amended samples were also fitted based on the results of the UCS tests. In order to analyse benefits in pavement design and thickness reduction, the UCS values were used to predict the CBR value of the specimens based on which the reduction in pavement thickness was calculated for different traffic densities. The investigation revealed that 5% SDA amendment of cement stabilization can result in up to 26% increase in early strength and 20% increase in delayed strength. Based on the predicted CBR values, pavement thickness can be reduced up to 8.3%.

scholarly journals Performance of soils enhanced with eco-friendly biopolymers in unconfined compression strength tests and fatigue loading tests

2021 ◽  
Author(s):  
Jing Ni ◽  
Shan-Shan Li ◽  
Lei Ma ◽  
Xueyu Geng
Keyword(s):  
Moisture Content ◽  
Compression Strength ◽  
Xanthan Gum ◽  
Initial Moisture Content ◽  
Fatigue Loading ◽  
Unconfined Compression Strength ◽  
Unconfined Compression ◽  
Soil Stabilisation ◽  
Loading Tests ◽  
Gum Content

Recently, biopolymers have emerged in soil stabilisation. The efficiency of biopolymers in groundimprovement is mainly dependent on biopolymer types, soil types, biopolymer contents, curing periods,thermal treatment and mixing methods. However, the effect of the initial moisture content during samplepreparation stages, on the mechanical behaviours of biopolymer-treated soils, has not been fullyunderstood. The first part of this study probed the role of initial moisture content, in treating Shanghaiclay with the xanthan gum by performing standard proctor compaction tests, Atterberg limit tests,unconfined compression strength (UCS) tests and microstructural analysis, while the second part contributedto capture the fatigue behaviours of the samples treated with an ideal moisture content by performingconstant-amplitude and stepping-amplitude fatigue loading tests. Our results showed that theimprovement appeared to occur from an average optimum moisture content for the treated soils (treatedoptimum), which was 3% wet of the untreated optimum. As the initial moisture content increased, theUCS values were elevated. However, there existed an ideal initial moisture content leading to the maximumstrengthening efficiency. For xanthan gum content (i.e., the mass of xanthan gum with respect tothe mass of dry soil) ranging from 1.0% to 5.0%, this ideal value was between 1.1 and 1.2 times the treatedoptimum. Our results also indicated that xanthan gum, as a biopolymer soil strengthener, was efficient inincreasing either fatigue life or bearing capacity, under repeated loading for xanthan gum-soil matrices,when compared to untreated soils. While the untreated soils failed at the stress level of only half the UCS,the xanthan gum-treated soils with a 3.0% xanthan gum content sustained at the end of the tests. Thesedata imply the potential use of xanthan gum in soil stabilisation, under repeated loads.

EFFECT OF SODIUM SILICATE AS LIQUID BASED STABILIZER ON SHEAR STRENGTH OF MARINE CLAY

2015 ◽  
Vol 76 (2) ◽  
Author(s):  
Faizal Pakir ◽  
Aminaton Marto ◽  
Nor Zurairahetty Mohd Yunus ◽  
Saiful Azhar Ahmad Tajudin ◽  
Choy Soon Tan
Keyword(s):  
Construction Industry ◽  
Sodium Silicate ◽  
Development Project ◽  
Brand Name ◽  
Unconfined Compression Strength ◽  
Unconfined Compression ◽  
Marine Clay ◽  
Economic Method ◽  
Problematic Soils ◽  
Engineering Projects

Marine clay is one of the problematic soils found in the development project due to the high compressibility and swelling, and low bearing capacity. A new liquid stabilizing agent, with a commercial brand name of “TX-85” had been introduced in the construction industry for improving the strength and reliability of soils for construction of building and road. Therefore, a laboratory study was led to assess the impacts of sodium silicate on the unconfined compression strength (UCS) and plasticity index of marine clay. The results show that the addition of the sodium silicate can reduce the plasticity and slightly increased the UCS of the soils, also the UCS increased with the duration of curing time. It can be concluded that, the stabilization using sodium silicate can be used as an alternative and economic method in the civil engineering projects.

scholarly journals Prediction of Unconfined Compression Strength for Saline-Alkaline Soils Mixed with Cement and Wheat Straw

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Guoqi Xing ◽  
Changjiang Liu ◽  
Wei Xuan ◽  
Yueyue Pan ◽  
Bing Zhang ◽  
...  
Keyword(s):  
Wheat Straw ◽  
Compression Strength ◽  
Cement Content ◽  
Test Results ◽  
Alkaline Soils ◽  
Unconfined Compression Strength ◽  
Compression Tests ◽  
Unconfined Compression ◽  
Brittle Behavior ◽  
Saline Alkaline Soils

A series of unconfined compression tests were performed to investigate the influence of wheat straws on the unconfined compression strength for saline-alkaline soils and saline-alkaline soils mixed with cement. In unconfined compression tests, 20 groups of soil specimens were prepared at five different percentages of wheat straws content (i.e., 0.0%, 0.1%, 0.15%, 0.2%, and 0.25% by weight of saline-alkaline soils) and four different percentages of cement content (i.e., 0%, 3%, 6%, and 9% by weight of saline-alkaline soils), and unconfined compression tests were carried out after 3-, 7-, 14-, 28-, and 56-day curing periods. Test results indicated that the inclusion of wheat straws within saline-alkaline soils and saline-alkaline soils mixed with cement leads to an increase in the unconfined compressive strength of specimens and also changed the brittle behavior to a more ductile one for specimens. In addition, based on the results from unconfined compression tests, a formula for predicting the unconfined compression strength of specimens related to cement content, wheat straw content, curing periods, etc., was determined, and comparing with the results from unconfined compression tests, it had higher precision in predicting the unconfined compression strength of specimens.

Studi Pengaruh Abu Batu Bata terhadap SifatFisik dan Mekanik Lempung Terstabilisasi Kapur dari Kecamatan Tenayan Raya

2021 ◽  
pp. 17-23
Author(s):  
Soewignjo Agus Nugroho ◽  
Ferry Fatnanta ◽  
Giri Prayoga
Keyword(s):  
Compressive Strength ◽  
Shear Strength ◽  
Moisture Content ◽  
Compression Strength ◽  
Unconfined Compressive Strength ◽  
Soft Clay ◽  
Setup Time ◽  
Unconfined Compression Strength ◽  
Unconfined Compression ◽  
Optimal Moisture Content

Tenayan Raya Subdistrict is an area that has a thickness of soft clay layer. Some cases of building failure were cracks and tilts due to high shrinkage of soil. Nearby is also a brick home industry center, where ashes are produced from bricks burning. Soil Improvement of Tenayan-Raya's Clay and utilization of brick ash will be carried out in this research. This study aims to stabilize the soil with lime and utilize the brick ash to improve shear strength and bearing capacity of the soil. The study was conducted in the laboratory by making several combinations of content clay, lime, and Brick Ash (BA), for the soil mixture which will be added with 10% ash brick. The effect of curing and soaked will also be seen for its rising on soil properties of Unconfined Compression Strength, and CBR laboratories. The influence of water will also be reviewed on the dry side, optimal moisture content, and wet side. The test results show that the Soil has Low Plasticity soil type category CL-ML symbols, according to the Unified classification. Increasing of strength due to stabilization with lime is obtained in conditions of water in optimal moisture content, where the addition of lime is 10% and 10% brick ash, was produced to increase the maximum value of Unconfined Compression Strength and CBR laboratory value. Curing setup time and saturation (soaked) also had affect the value of Unconfined Compressive Strength and CBR laboratory test. At longer time for curing, shear strength will rise proved by the value of UCS Test andbearing capacity value also increase that can be seen of the laboratory CBR test. Curing will make the shrinkage of clay reduced, this can be proven from differences value of Unconfined Compressive strength test between samples with and without soaked, are relatively small. 

Test for TG Soil Stabilizer Used in Pavement Base

2012 ◽  
Vol 446-449 ◽  
pp. 2474-2477
Author(s):  
Zi Yi Hou ◽  
Xiao Qiong Guo
Keyword(s):  
Mechanical Property ◽  
Cement Content ◽  
Orthogonal Experiment ◽  
Unconfined Compression Strength ◽  
Unconfined Compression ◽  
Factors Influencing ◽  
Soil Stabilizer ◽  
Stabilized Soil ◽  
Pavement Base ◽  
Cohesive Material

TG soil stabilizer was used for sand. A lot of experiment was made. The influence of cement, flyash and stabilizer content to unconfined compression strength were analyzed using orthogonal experiment. It was shown that the ranking of factors influencing 7d and 28d strength of stabilized soil is cement content>stabilizer content>flyash content. TG stabilizer is mechanical property well and simple to construction. It can meet with the demand of pavement base as a new cohesive material in stone lack area. There is good foreground for stabilizer used in highway.

scholarly journals Analysis of shear strength of the expansive soil stabilized with kaolin at various soaking times

2021 ◽  
Vol 878 (1) ◽  
pp. 012050
Author(s):  
R P W Gultom ◽  
R M Simanjuntak
Keyword(s):  
Shear Strength ◽  
Compression Strength ◽  
Soil Stabilization ◽  
Expansive Soil ◽  
Expansive Clay ◽  
Unconfined Compression Strength ◽  
Unconfined Compression ◽  
Stabilized Soil ◽  
Time Variations ◽  
Dry Soil

Abstract Expansive clay soils are high shrinkage soils that have low bearing capacity. So an effort is needed to reduce the nature of its swelling. One effort that can be done is the method of soil stabilization, where the soil is mixed with materials that can reduce soil swelling and increase the shear strength of the soil. One of the materials that can be used is kaolin powder. Kaolin is a stabilizing agent found in nature so it is easy to obtain. The purpose of this research is to analyse the decrease of expansive soil swelling and the value of its unconfined compression strength at various soaking times. The test was carried out by mixing 9% kaolin powder against dry soil weight. The stabilized soils were then compacted as samples to be soaked with time variations of 0 days, 3 days, 7 days, 10 days, and 14 days. The results of the test after soaking 14 days is a decrease of the stabilized soil swelling value up to 67.78%. The unconfined compression strength is increase up to 77.28% compared to its natural condition.

Experimental Study on Unconfined Compression Strength of Compacted Granite Residual Soils

2011 ◽  
Vol 250-253 ◽  
pp. 2124-2128
Author(s):  
Dong Xia Chen ◽  
Kai Yang ◽  
Yan Yang
Keyword(s):  
Moisture Content ◽  
Compression Strength ◽  
High Strength ◽  
Degree Of Saturation ◽  
Unconfined Compression Strength ◽  
Compression Tests ◽  
Unconfined Compression ◽  
Residual Soils ◽  
Engineering Structures ◽  
Wetting And Drying

Granite residual soils are often used as compacted soils in engineering structures such as pavement, embankments and backfills in Xiamen. Many geotechnical problems such as bearing capacity, lateral earth pressures and slope stability require an assessment of the shear strength of soil. Since the geotechnical properties of residual soils are impaired in contact with water, a series of unconfined compression tests are carried out on granite residual soils. Results of tests include effects of degree of compaction, moisture content, degree of saturation and cyclic wetting and drying on unconfined compression strength respectively. The increase in degree of compaction and compacting effort increases unconfined compression strength and the former greatly affects the strength. Moisture content of soils is higher than the optimum one of 2.5% for high strength and it is lower than optimum one of 2.5% for good plasticity in Xiamen areas. The degree of saturation of high unconfined compression strength normally ranges from 64% to 76%. In addition, cyclic wetting and drying causes loss of unconfined compression strength and the maximum loss commonly occurs at the first cycle and then is slowed down by the following cycles till the strength remains approximately constant.

Engineering Behavior of Lime-Treated Louisiana Subgrade Soil

1996 ◽  
Vol 1546 (1) ◽  
pp. 24-31 ◽  
Author(s):  
Anand J. Puppala ◽  
Louay N. Mohammad ◽  
Aaron Allen
Keyword(s):  
Moisture Content ◽  
Compression Strength ◽  
Resilient Modulus ◽  
Engineering Properties ◽  
Dry Density ◽  
Unconfined Compression Strength ◽  
Unconfined Compression ◽  
Lime Treatment ◽  
Treated Soil ◽  
Subgrade Soil

Lime stabilization is often used to treat subgrade soils when they are soft and cohesive in nature. A study was conducted to investigate the engineering behavior, including the resilient and strength behaviors, of a lime-treated subgrade soil. The lime treatment procedure was adapted from the specifications of the Louisiana Department of Transportation and Development. Silty clay, a soil often found in Louisiana subgrades, is used as a base soil. A summary of various engineering properties of a lime-treated soil from resilient modulus, unconfined compression strength, and California bearing ratio (CBR) tests conducted at five moisture content and dry density levels is provided. Tests were also performed on the raw soil without lime treatment, and these results were compared with those of tests with the lime-treated soil. The comparisons indicate that the present lime treatment method results in an increase in strength and resilient modulus properties and a decrease in plasticity characteristics and plastic strains. A regression model with three constants was used to analyze the resilient modulus test results. The model constants are presented as functions of soil properties. Resilient modulus correlations that use either CBR or unconfined compression strength, moisture content, dry density, degree of compaction, and stresses as dependent attributes are developed.

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