酸激发剂对固废材料活性激发效果的影响

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (8): 2941-2951.

酸激发剂对固废材料活性激发效果的影响

张会芳^1,2, 龚琳洋¹, 陈洁¹, 张玉栋¹, 曹慧³, 刘哲颖⁴, 李玉宽⁵, 魏文博³, 刘凯宏³

1.河北建筑工程学院土木工程学院,张家口 075000;
2.河北省装配式建筑与地下工程技术创新中心,张家口 075000;
3.张家口市住房和城乡建设局,张家口 075000;
4.张家口市桥西区市政工程和地方道路服务中心,张家口 075000;
5.河北智诚检验认证集团有限公司,张家口 075000

收稿日期:2023-12-29 修订日期:2024-03-08 出版日期:2024-08-15 发布日期:2024-08-12
通信作者: 张玉栋,副教授。E-mail:2450548469@qq.com
作者简介:张会芳(1979—),女,副教授。主要从事材料科学、绿色建材与节能建筑新体系、工农业废弃物综合利用技术方面的研究。E-mail:42228449@qq.com
基金资助:
河北省教育厅科学研究项目(CXY2024002);张家口市科技计划(2322078D);张家口市科学技术协会课题(ZJKKXE12);河北建筑工程学院硕士研究生创新基金(XY2023062)

Influence of Acid Activator on Activation Effect ofSolid Waste Materials

ZHANG Huifang^1,2, GONG Linyang¹, CHEN Jie¹, ZHANG Yudong¹, CAO Hui³, LIU Zheying⁴, LI Yukuan⁵, WEI Wenbo³, LIU Kaihong³

1. School of Civil Engineering, Hebei University of Architecture, Zhangjiakou 075000, China;
2. Prefabricated Building and Underground Engineering Technology Innovation Center of Hebei Province, Zhangjiakou 075000, China;
3. Zhangjiakou Housing and Urban Rural Development Bureau, Ltd., Zhangjiakou 075000, China;
4. Zhangjiakou Qiaoxi District Municipal Engineering and Local Road Service Center, Ltd., Zhangjiakou 075000, China;
5. Hebei Zhicheng Testing Technology Service Co., Ltd., Zhangjiakou 075000, China

Received:2023-12-29 Revised:2024-03-08 Online:2024-08-15 Published:2024-08-12

摘要/Abstract

摘要： 为了探究酸激发剂种类和浓度对固体废弃物的活性激发效果,采用控制变量法,选用三种酸溶液作为激发剂对粉煤灰和矿渣进行活性激发,激发后的粉煤灰和矿渣混合作为胶凝材料取代30%(质量分数,下同)的水泥,选用全铁尾矿砂和全再生骨料两种材料分别作为灌浆料试件的两种细骨料进行试验。试验结果表明:经适量浓度的酸激发剂浸泡激发的固废材料活性得到不同程度的提升;对比全铁尾矿砂试验组和全再生细骨料试验组的强度发现酸激发剂对再生骨料试验组的强度提升效果较好;对于同种细骨料的试验组,盐酸对试件强度提升效果较好。当酸溶液种类相同时,浓度为1%的草酸溶液、1%的醋酸溶液、2%的盐酸溶液对铁尾矿砂试验组的提升效果较好;浓度为1%的草酸溶液、3%的醋酸溶液、1.5%的盐酸溶液的再生骨料试验组提升效果较好。通过X射线衍射(XRD)和扫描电子显微镜(SEM)分析发现使用酸激发胶凝材料,试件中石英和钙矾石相对含量上升,说明酸激发能够促进水化反应的进行。

关键词: 酸激发, 固体废弃物, 水泥基灌浆料, 铁尾矿砂, 再生细骨料, 力学性能

Abstract: In order to investigate the effect of different types and concentrations of acid activators on the activation effect of solid waste, the controlled variable method was used. Three acid solutions were selected as activators to activate fly ash and slag. The activated fly ash and slag were mixed as cementitious materials to replace 30% (mass fraction) of cement. Two types of fine aggregates, all iron tailings sand and all recycled aggregates, were selected as grouting material specimens for testing. The experimental results show that the activity of solid waste materials stimulated by soaking in an appropriate concentration of acid activator is improved to varying degrees. Comparing the strength of the all iron tailings test group and the fully recycled fine aggregate test group, it is found that the acid activator has a better effect on improving the strength of the recycled aggregate test group. For the experimental group of the same type of fine aggregate, hydrochloric acid has a better effect on improving the strength of the specimens. When the types of acid solutions are the same, oxalic acid solution with a concentration of 1% (mass fraction), acetic acid solution with a concentration of 1% (mass fraction), and hydrochloric acid solution with a concentration of 2% (mass fraction) have a better improvement effect on the iron tailings test group. The experimental group of recycled aggregates with a concentration of 1% (mass fraction) oxalic acid solution, 3% (mass fraction) acetic acid solution, and 1.5% (mass fraction) hydrochloric acid solution show better improvement effects. Through X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis, it is found that the use of acid excited cementitious materials resulted in an increase in the relative content of quartz and ettringite in the specimens, indicating that acid excitation can promote the progress of hydration reactions.

Key words: acid excitation, solid waste, cement based grouting material, iron tailings sand, recycled fine aggregate, mechanical property

中图分类号:

TU528.1

张会芳, 龚琳洋, 陈洁, 张玉栋, 曹慧, 刘哲颖, 李玉宽, 魏文博, 刘凯宏. 酸激发剂对固废材料活性激发效果的影响[J]. 硅酸盐通报, 2024, 43(8): 2941-2951.

ZHANG Huifang, GONG Linyang, CHEN Jie, ZHANG Yudong, CAO Hui, LIU Zheying, LI Yukuan, WEI Wenbo, LIU Kaihong. Influence of Acid Activator on Activation Effect ofSolid Waste Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(8): 2941-2951.

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