摘要: |
为改善蒸压加气混凝土(AAC)的吸水特性,对比分析了以硬脂酸钙、甲基硅酸钾和憎水硅氧烷这3种憎水剂改性的AAC抗压强度、导热系数和吸水率.结果表明:3种憎水剂均会显著降低AAC的吸水率,提高其饱和吸水强度保留系数;3种憎水剂中,以憎水硅氧烷的改性效果最佳,其适宜掺量(质量分数)为04%~08%. |
关键词: 蒸压加气混凝土 憎水剂 抗压强度 吸水率 |
DOI:103969/j.issn.1007 9629201706023 |
分类号: |
基金项目:江苏省产学研前瞻性联合研究项目(BY2015029 01);国家自然科学基金资助项目(51678083) |
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Effect of Water Repellent on the Water Absorption Properties of Autoclaved Aerated Concrete |
LI Shujin, QIAN Hongping, HUANG Xiaohong, ZHOU Yiyi, SHI Weicheng
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Changzhou Key Laboratory of Construction Engineering Structure and Material Properties, Changzhou Institute of Technology, Changzhou 213002, China
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Abstract: |
In order to reduce the water absorption of autoclaved aerated concrete(AAC), three types of water repellent were added into AAC and its effect were observed. The compressive strength, thermal conductivity and water absorption of AAC containing potassium trimethylsilanolate(PT), calcium stearate(CS) and siloxane based polymer(SP) were tested. The experimental results indicate that the water absorption of AAC is reduced greatly with the addition of three types of water repellent and the strength retention coefficient(RS) is significantly improved as increasing the content of water repellent. The testing results show that, among three types of water repellent, addition of siloxane based polymer is the best and the content(by mass) of 04%08% is recommended. |
Key words: autoclaved aerated concrete(AAC) water repellent compressive strength water absorption |