水分与氯离子在再生混凝土中的迁移规律
|
摘要
采用毛细吸盐方法对水分及氯离子在再生混凝土中的迁移展开了研究。研究了不同取代率、不同氯盐浓度下再生混凝土的水分和氯离子的侵入规律,分析了毛细吸盐条件下水分和氯离子传输关系。结果表明,氯离子与水分的传输在再生混凝土中也呈现非同步性;再生粗骨料取代率大的试件中的水侵入深度约为氯离子侵入深度的3倍;在毛细吸附初期,二者渗透呈现近似线性相关关系。
The intrusion laws of water and chloride ions in recycled concrete at different substitution rates and different chloride concentrations are studied. The relationship between moisture and chloride transport under capillary suction conditions is analyzed. The results show that the transport of chloride ion and moisture is also non-synchronous in the recycled concrete; the depth of water penetration in the sample with large replacement rate of regenerated aggregate is approximately 3 times the penetration depth of chloride; at the initial stage of capillary adsorption, penetration presents an approximately linear correlation.
The intrusion laws of water and chloride ions in recycled concrete at different substitution rates and different chloride concentrations are studied. The relationship between moisture and chloride transport under capillary suction conditions is analyzed. The results show that the transport of chloride ion and moisture is also non-synchronous in the recycled concrete; the depth of water penetration in the sample with large replacement rate of regenerated aggregate is approximately 3 times the penetration depth of chloride; at the initial stage of capillary adsorption, penetration presents an approximately linear correlation.
引文
[1]李明顺.坚持科研促使混凝土结构设计规范水平跻身世界先进行列[J].工程建设标准化,1997(1):13-16.
[2]张誉,蒋利学,张伟平,等.混凝土结构耐久性概论究[M].上海:科学技术出版社,2003.
[3]HIRAO H,YAMADA K,TAKAHASHI H,et al.Chloride bin ding of cement estimated by binding isotherms of hydrates[J].Adv Concr Technol,2005(1):77-84.
[4]万惠文,林宗寿,水中和.再生混凝土中的水分扩散机理与模型.武汉理工大学学报,2003(12):103-107.
[5]郭远臣.再生骨料/水泥复合材料干缩性能研究[D].昆明:昆明理工大学,2010.
[6]韦玉柳.考虑双界面过渡区影响的再生混凝土中氯离子扩散规律分析[D].南宁:广西大学,2017.
[7]ISO 15148.Hygrothermal performance of building materials and products-Determination of water absorption coefficient by partial immersion,2002.
[8]Tang L.Chloride transport in concrete—Measurement and prediction,Doctoral thesis,Dept.of Building Materials[D].Chalmers Universities of Technology,Publication P-96:6,Gothenburg,Sweden,1996.
[9]刘军,陈晓池,邢锋,等.氯离子渗透对混凝土表层渗水系数及微观结构的影响[J].功能材料,2014(11):11096-11100.
[10]HIRAO H,YAMADA K,TAKAHASHI H,ct al.Chloride binding of cement estimated by binding isotherms of hydrates[J].Adv Concr Technol,2005(1):77-84.
[2]张誉,蒋利学,张伟平,等.混凝土结构耐久性概论究[M].上海:科学技术出版社,2003.
[3]HIRAO H,YAMADA K,TAKAHASHI H,et al.Chloride bin ding of cement estimated by binding isotherms of hydrates[J].Adv Concr Technol,2005(1):77-84.
[4]万惠文,林宗寿,水中和.再生混凝土中的水分扩散机理与模型.武汉理工大学学报,2003(12):103-107.
[5]郭远臣.再生骨料/水泥复合材料干缩性能研究[D].昆明:昆明理工大学,2010.
[6]韦玉柳.考虑双界面过渡区影响的再生混凝土中氯离子扩散规律分析[D].南宁:广西大学,2017.
[7]ISO 15148.Hygrothermal performance of building materials and products-Determination of water absorption coefficient by partial immersion,2002.
[8]Tang L.Chloride transport in concrete—Measurement and prediction,Doctoral thesis,Dept.of Building Materials[D].Chalmers Universities of Technology,Publication P-96:6,Gothenburg,Sweden,1996.
[9]刘军,陈晓池,邢锋,等.氯离子渗透对混凝土表层渗水系数及微观结构的影响[J].功能材料,2014(11):11096-11100.
[10]HIRAO H,YAMADA K,TAKAHASHI H,ct al.Chloride binding of cement estimated by binding isotherms of hydrates[J].Adv Concr Technol,2005(1):77-84.