聚合物改性自密实混凝土的工作性能及力学性能

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (5): 1489-1496.

所属专题：水泥混凝土

聚合物改性自密实混凝土的工作性能及力学性能

侯圣均¹, 蒋晨晨¹, 汤维宇¹, 陶文江², 安雪晖³, 马嘉均⁴

1.中电建路桥集团有限公司,北京 100048;
2.中国水利水电第四工程局有限公司,西宁 810007;
3.清华大学土木水利学院,北京 100084;
4.北方工业大学土木工程学院,北京 100144

收稿日期:2020-12-02 修回日期:2021-02-10 出版日期:2021-05-15 发布日期:2021-06-07
通讯作者: 马嘉均,硕士研究生。E-mail:15001076682@126.com
作者简介:侯圣均(1985—),男,工程师。主要从事工程技术管理工作。E-mail:365615401@qq.com
基金资助:
交通运输行业重点科技项目面上项目(2018-MS2-051);国家自然科学基金青年基金(51709026)

Workability and Mechanical Properties of Polymer Modified Self-Compacting Concrete

HOU Shengjun¹, JIANG Chenchen¹, TANG Weiyu¹, TAO Wenjiang², AN Xuehui³, MA Jiajun⁴

1. Power China Road Bridge Group Co., Ltd., Beijing 100048, China;
2. Sinohydro Engineering Bureau 4 Co., Ltd., Xining 810007, China;
3. School of Civil Engineering, Tsinghua University, Beijing 100084, China;
4. School of Civil Engineering, North China University of Technology, Beijing 100144, China

Received:2020-12-02 Revised:2021-02-10 Online:2021-05-15 Published:2021-06-07

摘要/Abstract

摘要： 聚合物改性水泥混凝土具备较好的抗拉性能和耐久性,其应用较为广泛,而聚合物改性自密实混凝土的应用较少。本文主要针对环氧树脂改性自密实混凝土基本力学性能和工作性能进行研究,试验采用四种掺量(0%、5%、10%、15%,质量分数)的环氧树脂,得到不同环氧树脂掺量对改性自密实混凝土基本力学性能和工作性能的影响。结果表明:与普通自密实混凝土相比,当环氧树脂的质量分数为5%时,对抗压强度有一定的改善作用;当环氧树脂的质量分数为10%时,抗折强度增强效果最优;当环氧树脂的质量分数大于等于10%时,混凝土中大孔转变为微孔;当环氧树脂的质量分数达到15%时,环氧树脂会固化成团,破坏混凝土内部结构。自密实混凝土的弯曲韧性随着环氧树脂掺量的增加而提升。虽然环氧树脂的掺量较多时,会减小自密实混凝土的流动度,但适当增加减水剂可增大流动度。

关键词: 环氧树脂, 自密实混凝土, 工作性能, 抗压强度, 抗折强度, 弯曲韧性, 孔隙分布

Abstract: The polymer modified cement concrete has good tensile properties and durability, and it is widely used, while the polymer modified self-compacting concrete is rarely used. The basic mechanical properties and workability of epoxy resin modified self-compacting concrete were studied. Four kinds of epoxy resin content (0%, 5%, 10%, 15%, mass fraction) were used in the experiment, and the effect of different epoxy resin content on the basic mechanical properties and workability of modified self-compacting concrete were obtained. The results show that: compared with ordinary self-compacting concrete, when the mass fraction of epoxy resin is 5%, the compressive strength is improved to a certain extent; when the mass fraction of epoxy resin is 10%, the flexural strength is the best; when the mass fraction of epoxy resin is 10% or more than 10%, the macropores in concrete turn into micropores; when the mass fraction of epoxy resin reaches 15%, the epoxy resin solidifies into clusters and destroys the internal structure of concrete. The flexural toughness of self-compacting concrete is improved with the increase of epoxy resin content. When the content of epoxy resin is high, the fluidity of self-compacting concrete decreases, but the fluidity can be improved by appropriately blending a water reducing agent.

Key words: epoxy resin, self-compacting concrete, workability, compressive strength, flexural strength, flexural toughness, pore distribution

中图分类号:

TU528

侯圣均, 蒋晨晨, 汤维宇, 陶文江, 安雪晖, 马嘉均. 聚合物改性自密实混凝土的工作性能及力学性能[J]. 硅酸盐通报, 2021, 40(5): 1489-1496.

HOU Shengjun, JIANG Chenchen, TANG Weiyu, TAO Wenjiang, AN Xuehui, MA Jiajun. Workability and Mechanical Properties of Polymer Modified Self-Compacting Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(5): 1489-1496.

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聚合物改性自密实混凝土的工作性能及力学性能

Workability and Mechanical Properties of Polymer Modified Self-Compacting Concrete

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