Multivariate regression models for predicting the compressive strength of bone ash stabilized lateritic soil for sustainable building

Obianyo, Ifeyinwa Ijeoma; Anosike-Francis, Esther Nneka; Ihekweme, Gina Odochi; Geng, Yang; Jin, Ruoyu; Onwualu, Azikiwe Peter; Soboyejo, Alfred

doi:10.1016/j.conbuildmat.2020.120677

Cited by 33 publications

(2 citation statements)

References 19 publications

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“…The structure of untreated lateritic soil changed with the addition of OPC. Lateritic soil mainly consists of alumina (Al 2 O 3 ) and silica (SiO 2 ) [76,111], while OPC considerably consists of calcium ions [86], as shown in Table 2, in terms of chemical elements, of which the highest values, belonging to aluminum and silicon in soil and calcium in OPC, were 16.9%, 16.1% and 34.4% respectively. The stabilization process with the addition of cement to the soil was performed in two stages: cement hydration (short term) and pozzolanic reactions (long term).…”

Section: Microstructure Analysismentioning

confidence: 99%

Strength and Durability of Cement-Treated Lateritic Soil

et al. 2021

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The transportation infrastructure, including low-volume roads in some regions, needs to be constructed on weak ground, implying the necessity of soil stabilization. Untreated and cement-treated lateritic soil for low-volume road suitability were studied based on Malaysian standards. A series of unconfined compressive strength (UCS) tests was performed for four cement doses (3%, 6%, 9%, 12%) for different curing times. According to Malaysian standards, the study suggested 6% cement and 7 days curing time as the optimum cement dosage and curing time, respectively, based on their 0.8 MPa UCS values. The durability test indicated that the specimens treated with 3% cement collapsed directly upon soaking in water. Although the UCS of 6% cement-treated specimens decreased against wetting–drying (WD) cycles, the minimum threshold based on Malaysian standards was still maintained against 15 WD cycles. On the contrary, the durability of specimens treated with 9% and 12% cement represented a UCS increase against WD cycles. FESEM results indicated the formation of calcium aluminate hydrate (CAH), calcium silicate hydrate (CSH), and calcium aluminosilicate hydrate (CASH) as well as shrinking of pore size when untreated soil was mixed with cement. The formation of gels (CAH, CSH, CASH) and decreasing pore size could be clarified by EDX results in which the increase in cement content increased calcium.

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Section: Microstructure Analysismentioning

confidence: 99%

Strength and Durability of Cement-Treated Lateritic Soil

et al. 2021

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“…The process requires adequate moisture, temperature and time [2]. If any of these parameters is missing in the early period of hydration of concrete, the desired strength of concrete cannot be obtained [3]. Hydration is the most significant part in the process of curing.…”

Section: Introductionmentioning

confidence: 99%

Effect of curing techniques on compressive strength of concrete

Anwar¹,

Tariq²,

Adil³

et al. 2022

World J. Adv. Res. Rev.

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This paper presented the findings of an experimental investigation into how common Portland cement concrete develops its compressive strength in a simple setting, such as Lahore, Pakistan. Ten concrete cube specimens of mix 1:1.5:3 was prepared with water-cement ratio of 0.5 for each of the four curing techniques (air curing, water-submerged curing, polythene curing, curing by boiling) until testing ages of 3, 7, 14, 21 and 28 days when their compressive strengths were determined. The findings demonstrated that concrete specimens produced using the water-submergence technique of curing had the maximum 28-day compressive strength of 41.42MPa. The findings indicate avoiding boiling as a curing process and restricting the use of other curing techniques to a 28-day timeframe. It was determined that there is a positive link between concrete specimen curing, curing duration, and compressive strength. This study also offers details on the significance of curing and numerous different methods for carrying out the procedure on the spot.

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