黏土-石膏胶结材料的强度试验

周承京; 王红鑫; 陈群; 何昌荣

doi:10.11779/CJGE2015S1012

黏土-石膏胶结材料的强度试验 English Version

四川大学水利水电学院水力学与山区河流开发保护国家重点实验室,四川成都 610065

详细信息

作者简介:
周承京(1991- ),男,硕士研究生,主要从事岩土工程研究。

通讯作者:
陈群

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出版历程
- 收稿日期: 2015-03-25
- 发布日期: 2015-07-24

Strength tests on clay-gypsum cementation materials

State Key Lab of Hydraulics and Mountain River Engineering, School of Hydraulic and Hydropower Engineering, Sichuan University, Chengdu 610065, China

摘要

摘要: 为研究黏土-石膏胶结材料的强度特性,在12~336 h的养护时间内,对4种不同配比的黏土-石膏胶结材料进行了单轴无侧限抗压强度试验,测得不同配比胶结材料的初凝时间以及无侧限抗压强度随养护时间的变化规律。同时,在黏土石膏混合料中掺入2~5 mm的砾石进行单轴无侧限抗压强度试验以探讨黏土-石膏胶结材料与砾石的联合作用。试验结果表明,黏土-石膏胶结试样的初凝时间较短,不超过15 min。试样的单轴无侧限抗压强度随时间的变化过程可分为前、中、后3个时期,分别对应强度略微减小、显著增长和趋于稳定3个阶段。掺砾后试样的前期强度未出现减小现象,中、后期强度随时间的变化规律与未掺砾试样相同,但强度显著增长较早且中期持续时间较长。掺砾试样的后期稳定强度远大于未掺砾试样的强度。
- 黏土-石膏胶结材料 /
- 单轴无侧限抗压强度试验 /
- 无侧限抗压强度 /
- 养护时间 /
- 配合比
Abstract: The uniaxial unconfined compressive strength tests are performed to investigate the strength properties of clay-gypsum cementation materials after curing of 12 to 336 hours. The initial setting time and change processes of uniaxial unconfined compressive strength with curing time are obtained. Meanwhile, the uniaxial unconfined compressive strength tests on clay-gypsum cementation materials mixed with gravels with diameter of 2 to 5 mm are conducted to study the effect of gravel combinion. The test results show that the initial setting time is short and less than 15 minutes. The change in the uniaxial unconfined compressive strength of the samples with curing time can be divided into three stages: early, medium and late stages, that is, strength change, obvious increase and stabilization stages. The early strength of the sample with gravels does not decrease and the change process of the medium and late strength is similar to that of the sample without gravels. However, its strength obviously increases earlier and medium stage is longer. The late stable strength of the sample with gravels is much larger than that of the sample without gravels.
- clay-gypsum cementation material /
- uniaxial unconfined compressive strength test /
- unconfined compressive strength /
- curing time /
- mix proportion

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参考文献(15)

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