电石渣激发钢渣-矿渣固化淤泥质土的试验研究

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (2): 733-739.

电石渣激发钢渣-矿渣固化淤泥质土的试验研究

王旭影¹, 乔京生¹, 赵建业², 蔡田明¹, 梁晨达¹

1.唐山学院土木工程学院,唐山 063000;
2.河北省地矿局第五地质大队,唐山 063000

收稿日期:2021-11-22 修回日期:2021-12-28 出版日期:2022-02-15 发布日期:2022-03-01
作者简介:王旭影(1987—),女,博士,讲师。主要从事工程地质方面研究。E-mail:wanyxy@tsc.edu.cn
基金资助:
唐山市科技计划(20130223b);河北省高等学校科学技术研究项目(BJ2020204,QN2021319);河北省地矿局地质科技项目(454-0601-YBN-FAA0)

Solidification of Muddy Soil with Steel Slag and Ground Granulated Blast-Furnace Slag Activated by Calcium Carbide Slag

WANG Xuying¹, QIAO Jingsheng¹, ZHAO Jianye², CAI Tianming¹, LIANG Chenda¹

1. Civil Engineering College, Tangshan University, Tangshan 063000, China;
2. The Fifth Geological Brigade of Hebei Bureau of Geology and Mineral Resources, Tangshan 063000, China

Received:2021-11-22 Revised:2021-12-28 Online:2022-02-15 Published:2022-03-01

摘要/Abstract

摘要： 钢渣和矿渣是常见的两种工业废渣,大量堆放且资源化利用困难。以钢渣粉和矿渣粉为基础材料,电石渣粉作为激发剂,可对淤泥质土进行固化处理。通过开展无侧限抗压强度试验,分析固化淤泥质土的强度特性和应力-应变关系,利用X射线衍射(XRD)和扫描电镜(SEM)等微观测试,探索电石渣激发钢渣-矿渣固化淤泥质土的作用机理。结果表明,电石渣粉质量掺量为6%时,电石渣-钢渣-矿渣固化淤泥质土无侧限抗压强度最大,28 d固化淤泥质土强度与同龄期水泥土相当,且具有较好的延性。电石渣可以提供碱性环境和大量钙离子,有效激发钢渣和矿渣的水化活性,促进C-S-H凝胶的大量生成,同时促进离子交换和团粒化作用,使固化淤泥质土强度显著提高。

关键词: 钢渣, 矿渣, 电石渣, 固化淤泥质土, 无侧限抗压强度, 微观机理

Abstract: Steel slag and ground granulated blast-furnace slag are two common industrial waste slags, which are piled up in large quantities and are difficult to use as resources. Using steel slag powder and blast-furnace slag powder as basic materials, and calcium carbide slag powder as activator, the muddy soil was solidified. The strength characteristics and stress-strain relationship of solidified muddy soil by carrying out unconfined compressive strength tests were analyzed. X-ray diffraction (XRD) and scanning electron microscopy (SEM) microscopic tests were used to explore the mechanism of calcium carbide slag activated steel slag and ground granulated blast-furnace slag solidified muddy soil. The results show that when the content of calcium carbide slag powder is 6%, the unconfined compressive strength of calcium carbide slag-steel slag-blast furnace slag solidified muddy soil is the highest. The 28 d solidified muddy soil has the same strength as cement solidified muddy soil of the same age and has good ductility. Calcium carbide slag provide an alkaline environment and a large amount of calcium ions, effectively stimulate the hydration activity of steel slag and blast furnace slag, promote the mass production of C-S-H gel, and promote ion exchange and agglomeration, so that the strength of solidified muddy soil is significantly improved.

Key words: steel slag, ground granulated blast-furnace slag, calcium carbide slag, solidified muddy soil, unconfined compressive strength, micro mechanism

中图分类号:

TU435

王旭影, 乔京生, 赵建业, 蔡田明, 梁晨达. 电石渣激发钢渣-矿渣固化淤泥质土的试验研究[J]. 硅酸盐通报, 2022, 41(2): 733-739.

WANG Xuying, QIAO Jingsheng, ZHAO Jianye, CAI Tianming, LIANG Chenda. Solidification of Muddy Soil with Steel Slag and Ground Granulated Blast-Furnace Slag Activated by Calcium Carbide Slag[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(2): 733-739.

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