| 硅酸盐水泥混凝土的碳化分析 |
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| 引用本文： | 何娟,杨长辉.硅酸盐水泥混凝土的碳化分析[J].硅酸盐通报,2009,28(6):1225-1229. |
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| 作者姓名： | 何娟 杨长辉 |
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| 作者单位： | 重庆大学材料科学与工程学院,重庆,400045 |
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| 摘 要： | 介绍了硅酸盐水泥混凝土的碳化反应和碳化过程,分析了Ca(OH)_2与水化硅酸钙(C-S-H)的碳化作用.Ca(OH)_2发生碳化反应的同时,C-S-H也会发生碳化反应;Ca(OH)_2的碳化产物是方解石,而C-S-H碳化后会转变成无定形硅胶,可能形成稳定性差、结晶度差的球霰石、文石,其分解温度低于方解石的分解温度;C/S低、结晶度差的C-S-H凝胶易于碳化;水泥浆体孔隙溶液中的碱含量越高,碳化速度越快,深度越大.
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| 关 键 词： | 混凝土 碳化 氢氧化钙 水化硅酸钙(C-S-H) |
Analysis of Carbonation on Portland Cement Concrete |
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| HE Juan,YANG Chang-hui.Analysis of Carbonation on Portland Cement Concrete[J].Bulletin of the Chinese Ceramic Society,2009,28(6):1225-1229. |
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| Authors: | HE Juan YANG Chang-hui |
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| Affiliation: | HE Juan,YANG Chang-hui(College of Materials Science and Engineering,Chongqing University,Chongqing 400045,China) |
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| Abstract: | Carbonation reaction and carbonation process of portland cement concrete were introduced,and carbonation of Ca(OH)2 and calcium silicate hydrated(C-S-H)was analyzed.The analysis showed:C-S-H also reacted with CO2 while Ca(OH)2 reacted with CO2.The main carbonated product of Ca(OH)2 was calcite and that of C-S-H was amorphous silica gel,and maybe unstable,poorly crystallized aragonite and vaterite were formed.Decomposition temperature of aragonite and vaterite was lower than calcite.C-S-H with low C/S and po... |
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| Keywords: | concrete carbonation Ca(OH)_2 calcium silicate hydrated(C-S-H) |
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