室外环境下不同尺寸混凝土中膨胀剂的应用效果研究

材料导报

2022, Vol. 36

Issue (Z1): 21110148-4

高分子与聚合物基复合材料

室外环境下不同尺寸混凝土中膨胀剂的应用效果研究

尹道道, 王海, 张珍杰, 向飞, 王海龙, 纪宪坤

武汉三源特种建材有限责任公司,武汉 430070

Research on Application Effect of Expansion Agent in Concrete of Different Sizes in Outdoor Environment

YIN Daodao, WANG Hai, ZHANG Zhenjie, XIANG Fei, WANG Hailong, JI Xiankun

Wuhan Sanyuan Special Building Materials Co., Ltd. , Wuhan 430070, China

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摘要依据结构特点选用适宜的膨胀剂可以降低混凝土开裂风险,提升工程质量。通过分析实际环境下混凝土的温度和应变,研究了钙质膨胀剂(AC)和镁质膨胀剂(MZ)对不同尺寸混凝土温度和应变的影响。结果表明:混凝土尺寸越大,混凝土中心温度越高,降温速率越慢,AC和MZ对不同尺寸混凝土的温度变化进程影响均较小;AC和MZ均能补偿混凝土的收缩,随着混凝土尺寸的增加,AC补偿收缩量降低,MZ补偿收缩量增加,其中混凝土尺寸为500 mm时AC的补偿收缩效果更好,1 500 mm时AC和MZ补偿的收缩量相差不大,3 000 mm时MZ的补偿收缩效果更好。

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关键词: 混凝土膨胀剂温度应变补偿收缩量

Abstract: According to the characteristics of concrete, the selection of appropriate expansion agent can reduce the risk of concrete cracking and improve the quality of the project. By analyzing the temperature and strain of concrete in the actual environment, the influence of calcium expansion agent (AC) and magnesium expansion agent (MZ) on the temperature and strain of concrete of different sizes was studied. The results show that, the larger the size of the concrete, the higher the temperature at the center of the concrete and the slower the cooling rate. AC and MZ have less influence on the temperature change process of different sizes of concrete; both AC and MZ can compensate for the shrinkage of the concrete, as the size of the concrete increases , AC compensation shrinkage is reduced, MZ compensation shrinkage is increased, among which AC compensation shrinkage is more effective under 500 mm size, AC and MZ compensation shrinkage is not much different under 1 500 mm size, and MZ compensation shrinkage is more effective under 3 000 mm size.

Key words: concrete expansion agent temperature strain compensation for shrinkage

出版日期: 2022-06-05 发布日期: 2022-06-08

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作者简介: 尹道道,2019年6月毕业于重庆大学,获得工学硕士学位。现为武汉三源特种建材责任有限公司研发工程师,主要研究领域为混凝土结构自防水及新型建筑材料研发。

引用本文:

尹道道, 王海, 张珍杰, 向飞, 王海龙, 纪宪坤. 室外环境下不同尺寸混凝土中膨胀剂的应用效果研究[J]. 材料导报, 2022, 36(Z1): 21110148-4.
YIN Daodao, WANG Hai, ZHANG Zhenjie, XIANG Fei, WANG Hailong, JI Xiankun. Research on Application Effect of Expansion Agent in Concrete of Different Sizes in Outdoor Environment. Materials Reports, 2022, 36(Z1): 21110148-4.

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http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2022/V36/IZ1/21110148

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