Effect of curing time on strength development in black cotton soil – Quarry fines composite stabilized with cement kiln dust (CKD)

Amadi, Agapitus Ahamefule; Osu, Abdukadir Sabo

doi:10.1016/j.jksues.2016.04.001

Cited by 36 publications

(17 citation statements)

References 7 publications

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“…The top or maximum pressure is higher for the sample with higher cement content in the , 0 (2019) https://doi.org/10.1051/matecconf /201928004011 MATEC Web of Conferences 280 ICSBE 2018 4011 mixture. In connection with that, the strain at maximum pressure decreases by increasing cement content [7]. The unconfined compression strength (qu) of a sample can be obtained from the curves in Figure 4 by recording the maximum pressure at the respective curve.…”

Section: Resultsmentioning

confidence: 95%

“…Cement is one of the most commonly used materials for soil stabilization. Records from the literature show that cement is an effective stabilizer in the improvement of the strength properties not only coarse-grained soil [1], [2], [3], [4] but also fine-grained soil [5], [6], [7].…”

Section: Introductionmentioning

confidence: 99%

“…The result repeals that above a minimum content of cement the hardening is not dependent on the change in the gel but reflects increased bonding to the mineral crystals. Besides influencing of stress-strain behavior, the strain at failure also decreases by increasing curing time [7].…”

Section: Introductionmentioning

confidence: 99%

“…A single stabilizing agent may not improve significantly in the required properties of the soils [7][8]. By adding fly ash, lime, or both, to Portland cement, the durability of freezing and thawing of stabilized soil increases and permeability of the mixture decreases significantly [9].…”

Section: Introductionmentioning

confidence: 99%

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Stabilization of Soft Soil with Cement and Palm Kernel Shell Ash Admixture

Arifin

Rahman

2019

MATEC Web Conf.

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This paper focuses the results of the improvement in shear strength parameters and CBR of soft clay when stabilized with cement and cement-Palm Kernel Shell Ash (PKSA). Different combinations of soil- cement and soil-cement-PKSA mixtures are prepared with the addition of cement and PKSA in the range of 2-10% by weight of soil. Series of tests including compaction, UCT, and CBR tests were performed. The influence of curing time is also studied on CBR and undrained strength property of various sample combinations. Results indicate that the addition of PKSA to the soil-cement mixtures increases the CBR. The percentage of optimum PKSA content in the mix for soil with 10% cement is 2%. The effect of time on clay, cement, and PKSA mixture is significant, i.e. an average of 0.5% per day.

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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stabilization of Soft Soil with Cement and Palm Kernel Shell Ash Admixture

Arifin

Rahman

2019

MATEC Web Conf.

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“…e older the concrete/mortar, the greater the hydration that has occurred and the higher the compressive strength [20,[28][29][30][31]. Cement gains strength upon hydration.…”

Section: Compressive Strengthsmentioning

confidence: 99%

Effect of Sulphate and Chloride Ingress on Selected Cements Mortar Prisms Immersed in Seawater and Leather Industry Effluent

Wachira

Ngari

Thiong’o

et al. 2019

Advances in Civil Engineering

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Cement structures are major capital investments globally. However, exposure of cement-based materials to aggressive media such as chloride- and sulphate-laden environments such as coastal areas affects their performance. Ordinary Portland cement (OPC) is the main cement used in buildings and civil structures such as dams and bridges. This paper reports the findings of an experimental investigation on the effect of ingress of Cl− and SO42− on compressive strength development and the ions’ diffusivity in selected OPC brands in Kenya. The aggressive media used included seawater (SW) and wastewater from leather industry (WLI). Three brands of commonly used cements of OPC in Kenya were used. Mortar prisms were prepared from each brand of cement at different water-to-cement ratios (w/c) of 0.5, 0.6, 0.65, and 0.7 and allowed to cure for 28 days in a highly humid environment. The aggressive ions’ ingress in the mortar prisms was accelerated using a potential difference of 12 V ± 0.1 V. Analysis of diffusivity and diffusion coefficient of Cl− and SO42− was finally done. Compressive strength analysis was done before (at the 2nd, 7th, 14th, and 28th day) and after exposure to the aggressive ions. The results showed that the diffusivity of chlorides was more pronounced than that of sulphates. Diffusivity was observed to be higher at higher w/c ratios for all cement categories. It was observed that compressive strength increased with curing age, with the highest observed at 28 days. Cement A was generally found to have the highest compressive strength for all w/c ratios. The compressive strength was observed to increase after the mortar prisms were exposed to SW as opposed to the ones exposed to WLI. Generally, it was also observed that the strength gain increased with increase in w/c. The loss in strength was also observed to increase with increase in w/c.

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