| 除冰盐对混凝土化学侵蚀机理研究 |
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| 引用本文： | 朱蓓蓉,杨全兵,黄士元. 除冰盐对混凝土化学侵蚀机理研究[J]. 低温建筑技术, 2000, 0(1): 3-6 |
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| 作者姓名： | 朱蓓蓉 杨全兵 黄士元 |
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| 作者单位： | 同济大学材料科学与工程学院,200433 |
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| 摘 要： | 通过测定混凝土强度、膨胀和剥落量 ,应用XRD、DTA分析 ,研究了除冰盐 (NaCl或CaCl2 )对混凝土化学侵蚀的机理。结果表明 :(1 )NaCl溶液和低浓度 (≤ 1 2 % )CaCl2 溶液对混凝土的化学侵蚀均较小 ,而高浓度 (2 0 % )CaCl2 溶液在温度较低 (1 0℃ )时引起混凝土严重破坏 ,随着环境温度的提高破坏明显减弱 ;(2 )粉煤灰能明显提高混凝土抗氯盐化学侵蚀能力 ;(3)复盐CaCl·Ca(OH) 2 ·H2 O的形成是高浓度 (2 0 % )CaCl2 溶液引起混凝土侵蚀破坏的主要原因
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| 关 键 词： | 混凝土 除冰盐 化学侵蚀 机理 |
| 修稿时间： | 1999-11-26 |
MECHANISM OF CHEMICAL ATTACK OF THE DEICER ON CONCRETE |
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| ZHU Beirong,YANG Quanbing,HUANG Shiyuan. MECHANISM OF CHEMICAL ATTACK OF THE DEICER ON CONCRETE[J]. Low Temperature Architecture Technology, 2000, 0(1): 3-6 |
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| Authors: | ZHU Beirong YANG Quanbing HUANG Shiyuan |
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| Affiliation: | ZHU Beirong,YANG Quanbing,HUANG Shiyuan(College of Materials Science and Engineering, Tongji University, Shanghai 200433, China) |
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| Abstract: | Mechanism of chemical attack of the deicer on concrete were investigated by measuring strength, expansion and the amount of scaling of concrete, and XRD, DTA analysis. The results showed that (1) NaCl and≤12% CaCl 2 solutions caused very slight attack on concrete, but 20% CaCl 2 solution caused very much severe attack at lower temperature (10℃) and the attack could be decreased with the increasing of temperature. (2)Fly ash could improve the attack. (3)The formation of CaCl 2·Ca(OH) 2H 2O was mainly the cause that a concentrated CaCl 2 solution caused very much severe attack on concrete. |
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| Keywords: | Concrete deicer chemical attack mechanisms |
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