Clayey soil stabilization using alkali-activated cementitious materials

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research 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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.