Clayey soil stabilization using alkali-activated cementitious materials

IF 1.1 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Materiales de Construccion Pub Date : 2020-02-13 DOI:10.3989/mc.2020.07519

J. Rivera, A. Orobio, R. Mejía de Gutiérrez, N. Cristelo

引用次数: 21

Abstract

In this study, a clayey soil classified as A-7-5 according ASTM D3282, was stabilized using alkali-activated cementitious materials (AAC) added to the soil dry in percentages of 20 and 30%. Fly ash (F1, F2) with high unburned carbon content (up to 38.76%), hydrated lime (L) and granulated blast furnace slag were used. Unconfined compressive strength and flexural strength at 28 days of curing and the durability after 12 wetting-drying cycles were evaluated. The results were compared with a soil-cement reference mixture. The soil treated with AAC-F1L showed a volume expansion of 0.51% and volume contraction of -0.57% compared with the 0.59% expansion and -0.68% contraction of the soil-cement reference mixture. Additionally, the mass loss after the wetting and drying cycles is only 3.74% which is slightly lower than the mass loss of the soil stabilized with ordinary Portland cement (OPC) (3.86%) and well below the value specified in Colombian regulations (7%).

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用碱活性胶凝材料稳定粘土

在本研究中，根据ASTM D3282分类为a-7-5的粘性土，使用添加到土壤中的碱活性胶结材料（AAC）进行稳定，干燥百分比分别为20%和30%。使用了未燃碳含量高（高达38.76%）的粉煤灰（F1，F2）、熟石灰（L）和粒化高炉矿渣。对养护28天时的无侧限抗压强度和弯曲强度以及12个干湿循环后的耐久性进行了评估。将结果与土壤水泥参考混合物进行了比较。用AAC-F1L处理的土壤显示出0.51%的体积膨胀和-0.57%的体积收缩，而土壤-水泥参考混合物的膨胀和收缩分别为0.59%和-0.68%。此外，湿润和干燥循环后的质量损失仅为3.74%，略低于用普通硅酸盐水泥（OPC）稳定的土壤的质量损失（3.86%），远低于哥伦比亚法规规定的值（7%）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materiales de Construccion 工程技术-材料科学：综合

CiteScore

3.20

自引率

9.50%

发文量

审稿时长

>12 weeks

期刊介绍： Materiales de Construcción is a quarterly, scientific Journal published in English, intended for researchers, plant technicians and other professionals engaged in the area of Construction, Materials Science and Technology. Scientific articles focus mainly on: - Physics and chemistry of the formation of cement and other binders. - Cement and concrete. Components (aggregate, admixtures, additions and similar). Behaviour and properties. - Durability and corrosion of other construction materials. - Restoration and conservation of the materials in heritage monuments. - Weathering and the deterioration of construction materials. - Use of industrial waste and by-products in construction. - Manufacture and properties of other construction materials, such as: gypsum/plaster, lime%2