利用红黏土弃渣制备岩溶区注浆材料配比及其性能研究

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (11): 3712-3722.

利用红黏土弃渣制备岩溶区注浆材料配比及其性能研究

张毅¹, 邓边员², 张延杰², 桂跃¹

1.昆明理工大学建筑工程学院,昆明 650500;
2.云南建投基础工程有限责任公司,昆明 650500

收稿日期:2021-04-26 修回日期:2021-05-31 出版日期:2021-11-15 发布日期:2021-12-08
通讯作者: 桂跃,博士,教授。E-mail:gydrgui@kmust.edu.cn
作者简介:张毅(1998—),男,硕士研究生。主要从事特殊土工程性质及其工程处理方面研究。E-mail:zhangyi.kust@foxmail.com
基金资助:
国家自然科学基金(51768027,52068039);云南省科技厅重点研发计划(2018BC013)

Proportion and Performance of Grouting Materials Prepared by Red Clay Slag in Karst Area

ZHANG Yi¹, DENG Bianyuan², ZHANG Yanjie², GUI Yue¹

1. Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China;
2. YCIH Foundation Engineering Co., Ltd., Kunming 650500, China

Received:2021-04-26 Revised:2021-05-31 Online:2021-11-15 Published:2021-12-08

摘要/Abstract

摘要： 在岩溶地区进行灌注桩施工时,注浆法可有效改善混凝土易流失、断桩、桩身孔洞等问题,但传统注浆材料成本较高且性能过剩,而且施工现场往往存在大量弃渣需要妥善处理。鉴于此,提出利用红黏土弃渣为基材,以水泥、粉煤灰为主固化剂,辅以水玻璃,制备新型注浆材料。通过正交试验,探究各组分对浆液关键性能指标的影响,确定最佳配比,并对最优配比下浆液结石体的微观结构进行分析。结果表明:水土比是影响浆液性能的主控因素;水泥掺量对浆液结石体的强度影响最大;粉煤灰可以增加浆液结石率,并提高结石体的后期强度;水玻璃主要起到加速凝结的作用。推荐的最佳配比为水土比0.6(质量比),水泥掺量10%(质量分数),粉煤灰掺量12%(质量分数),水玻璃掺量1.1%(质量分数)。经综合分析,该浆液具有流动性好、填充性好、强度适中、造价低廉等特点,适合工程大规模使用。

关键词: 红黏土弃渣, 注浆材料, 浆液配比, 流动度, 泌水率, 结石率

Abstract: During the construction of bored piles in karst area, grouting method can effectively improve the problems such as easy loss of concrete, broken pile, holes in pile body and so on, but the cost of traditional grouting materials is high and the performance is excessive; on the other hand, there are often a lot of abandoned slag in the construction site that need to be properly disposed of. A new type of grouting material was prepared by using red clay slag as base material, cement and fly ash as main curing agents and sodium silicate as auxiliary. Through the orthogonal test, the influence of each component on the key performance index of slurry was explored, the optimum proportion was determined, and the microstructure of slurry stone body under the optimal proportion was analyzed. The results show that the water-soil ratio is the main factor affecting the performance of slurry. The content of cement has the greatest influence on the strength of slurry stone body. The fly ash increases the concretion rate of slurry and improves the later strength of stone body. The sodium silicate mainly plays a role in accelerating setting. The optimal proportion of slurry is water-soil mass ratio of 0.6, cement content of 10% (mass fraction), fly ash content of 12% (mass fraction) and sodium silicate content of 1.1% (mass fraction). After comprehensive analysis, the slurry has the characteristics of high fluidity, good fallibility, moderate strength and low cost, which meets the large-scale use of the engineering.

Key words: red clay slag, grouting material, proportion of slurry, fluidity, bleeding rate, concretion rate

中图分类号:

TU521

张毅, 邓边员, 张延杰, 桂跃. 利用红黏土弃渣制备岩溶区注浆材料配比及其性能研究[J]. 硅酸盐通报, 2021, 40(11): 3712-3722.

ZHANG Yi, DENG Bianyuan, ZHANG Yanjie, GUI Yue. Proportion and Performance of Grouting Materials Prepared by Red Clay Slag in Karst Area[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(11): 3712-3722.

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