Analysis of strength development in soft clay stabilized with cement-based stabilizer

Ma, Cong; Chen, Longzhu; Chen, Bing

doi:10.1016/j.conbuildmat.2014.08.087

Cited by 118 publications

(32 citation statements)

References 27 publications

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“…Some of these fibre materials include rice husk ash (RHA), peat, marl, coal ash, cassava peels and a host of others. Many researchers have studied the response and effect of the addition of these materials in improving the strength characteristics and durability of compressed earth bricks (Ola, 1989;Moore, 1987in AttohOkine, 1995Osula, 1996;Bell, 1996;Bahar et al, 2004;Venkatarama Reddy and Gupta, 2008;Billong et al, 2009;Al-Amoudi et al, 2010;Villamizar et al, 2012;Al-Jabri and Shoukry, 2014;and Cong et al, 2014). Their findings generally indicate a positive improvement in strength properties and durability of CEBs, which depend largely on the method and type of stabilization.…”

Section: Stabilization Of Ceb's and Stabilizersmentioning

confidence: 99%

“…Trials on stabilization of soil using cement dates back to 1917 and, since then, it has gained a wide acceptance and usage in different engineering applications all over the world. Recently, various authors reported on the use of cement in construction works with earth materials and the improvement of engineering properties of these soils as well as lower water absorption (Walker, 1995;Bahar et al, 2004;Horpibulsuk et al, 2010;Goodary et al, 2012;Cong et al, 2014;and Khemissa and Mahamedi, 2014).…”

Section: Cement + H 2 O Csh + Ca(oh) 2 Equationmentioning

confidence: 99%

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A review of the use of lateritic soils in the construction/development of sustainable housing in Africa: A geological perspective

Oyelami

Rooy

2016

Journal of African Earth Sciences

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Highlights• Appraisal of the previous work in the use of tropical soils in low cost, energy efficient housing development.• It established CEBs as sustainable building materials for a sustainable environment.• Identification of lateritic soils as suitable material in the production of CEBs.• Established the importance of parent rock material (its type and mineralogy) in strength and durability of CEBs.• Discouraging the common practice of firing clay bricks for the sake of sustainable environment. AbstractLateritic soils have been described as highly weathered tropical or sub-tropical residual soils with varying proportions of particle sizes ranging from clay size to gravel, usually coated with sesquioxide rich concretions. It is sometimes referred to as brick earth based on its use. The use of laterite and lateritic soils have been found to promote the realization of decent housing and bridging the housing deficit, especially in Africa.The author has attempted to review available information on the recent trends in building bricks and housing development with the aim of identifying a suitable soil material that will meet the present challenge of sustaining the environment without costing too much and maintaining a high standard of strength, durability and aesthetics. A critical review of laterite and lateritic soils from a geological point of view indicated these soils to be one of the best natural materials used in the production of compressed earth bricks. Lateritic soils are mostly well graded, comprising both cohesive (silt and clay) and cohesionless (sands and gravels) soil fraction, it contains sesquioxides and clay minerals which are very useful in the natural binding process as well as in the presence of most chemical binders.Compressed earth bricks are mainly composed of raw earth materials (soil) with their cohesion due principally to the clay fraction present in both humid and dry states. CEB's promote building in a 'sustainable' way and offers a good prospect to using our resources in an efficient manner while creating dwellings that improve human health, well-being and preserving a better environment, with an affordable and natural alternative.

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Section: Stabilization Of Ceb's and Stabilizersmentioning

confidence: 99%

Section: Cement + H 2 O Csh + Ca(oh) 2 Equationmentioning

confidence: 99%

A review of the use of lateritic soils in the construction/development of sustainable housing in Africa: A geological perspective

Oyelami

Rooy

2016

Journal of African Earth Sciences

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“…The stabilization of clay and soft soils has been studied by several researchers using cement [10][11][12][13][14][15][16][17]; fly ash [18][19][20][21]; and lime [22][23][24][25]. Few researchers focused on the stabilization of mineral soil such as clay, silty clay, and dispersive soil by different types of stabilizers.…”

Section: Introductionmentioning

confidence: 99%

Physical and Geotechnical Properties of Tropical Peat and Its Stabilization

Kolay¹,

Taib²

2018

Peat

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The chapter presents the physical and engineering properties of tropical peat treated with various types of stabilizers. Quick lime (QL), fly ash (FA), and ordinary Portland cement (OPC) were used as stabilizers. The amounts of QL, FA, and OPC added with the peat samples are in the range of 2-8, 5-20, and 5-20%, respectively. Various physical or index and engineering tests have been conducted to characterize the peat samples. Unconfined compressive strength (UCS) tests were conducted on original and treated peat samples cured for 7, 14, and 28 days. The results show that the UCS value increases with the increase of all stabilizers used and with curing period. The UCS tests were also conducted on the peat samples with the combination of QL and FA to study the combined effects of the stabilizers. The present study established different correlations between physical and engineering properties of original peat and UCS results on treated peat samples with different types of stabilizers. Geotechnical engineers can refer to these correlations to determine the bearing capacity of treated peat. In addition, scanning electron microscope (SEM) studies were conducted on original and treated peat samples to investigate the microstructure of the samples.

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“…This technology was later extended to stabilization with sodium silicate in the presence of promoters. Cong et al [28] stabilized cement-based clay soil with sodium silicate and composite promoter. The promoters used were sodium hydroxide and calcium chloride, which were individually added to the system to allow for reaction to form calcium hydroxide in the presence of sodium silicate and cement.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Investigation and Strength Properties of Clay Stabilized With Cement, Rice Husk Ash and Promoter

et al. 2020

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A clay soil, classified as Clay of High plasticity (CH) according to Unified Soil Classification System (USCS) was stabilized with cement, Rice Husk Ash (RHA) and promoter. The mineralogy of the clay soil and the morphology of the clay and clay specimens admixed with varied composition of cement, RHA and promoter were evaluated in order to determine effect of the RHA on promoter stabilization of cement based clay soil. The promoter used in this study consists of calcium chloride and sodium hydroxide in the ratio of 1:1. The clay was remolded at standard Proctor compaction energy and the specimens were mixed with 0, 1.0, 2.0 and 3.0% cement, admixed with 1.0, 2.0, 3.0% RHA each, and 0.3, 0.6, 1.0% promoter each. The molded specimens were cured for 1, 7, 14, 28, 60 and 90days before testing for Unconfined Compressive Strength (UCS) and consequently the modulus of elasticity. The UCS of specimens without cement increased from 20 kN/m2 for the natural clay soil to 95 kN/m2 on addition of 3% RHA and 1.0% promoter after 28 days of curing, representing 475% increase in the UCS. This increase was confirmed by morphology of the clay soil mixed with RHA and promoter only, which showed presence of calcium silicate hydrate. Addition of 3.0% cement with 3 and 1.0% RHA and promoter respectively, increased the UCS from 220 to 375kN/m2 after 28 days of curing, which was also confirmed by the morphology of the specimens. The highest elastic modulus of 48.3 MPa was observed at specimens containing 3% cement, 3% RHA and 1.0% promoter.

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Analysis of strength development in soft clay stabilized with cement-based stabilizer

Cited by 118 publications

References 27 publications

A review of the use of lateritic soils in the construction/development of sustainable housing in Africa: A geological perspective

A review of the use of lateritic soils in the construction/development of sustainable housing in Africa: A geological perspective

Physical and Geotechnical Properties of Tropical Peat and Its Stabilization

Microstructural Investigation and Strength Properties of Clay Stabilized With Cement, Rice Husk Ash and Promoter

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