掺活化煤渣粉混凝土表面氯离子浓度的时变规律
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摘要
为研究活化煤渣粉掺量和腐蚀时间对再生混凝土表面氯离子浓度的影响,测试了不同活化煤渣粉掺量的再生混凝土在3.5%Na Cl溶液中浸泡不同时间的各混凝土的表面氯离子浓度。试验结果表明:混凝土的表面氯离子浓度随腐蚀时间的延长而增长,且随着腐蚀时间的增加而趋于稳定;混凝土表面氯离子浓度随着活化煤渣粉掺量的增加先增大后降低,当煤渣粉掺量为30%时,其值达到最小。建立了活化煤渣掺量与混凝土表面氯离子浓度的指数模型,并对模型进行验证;该模型计算数据与实测数据很相近,可用来预测混凝土表面氯离子浓度,并作为预测掺活化煤渣粉混凝土结构寿命的理论依据。
The influence on concrete surface chloride concentration is studied with different activation coal power and corrosion time,concrete surface chloride concentration is measured in 3.5%NaCl solution with different activation coal power and corrosion time.Test result showed that concrete surface chloride concentration increased with the increase of corrosion time,and it tending towards stability with the increase of corrosion time.Concrete surface chloride concentration value is first increased then decreased with the increased of activation coal power amount.When activation coal power reached 30%,its value is reached minimum.The model of index between concrete surface chloride concentration and activation coal power amount is constructed,and the model is verified.The result showed that a good agreement exists between a computer simulating results and experimental results,which can be used as concrete surface chloride concentration,and can be used as theory basis on concrete structure life with different activation coal power.
The influence on concrete surface chloride concentration is studied with different activation coal power and corrosion time,concrete surface chloride concentration is measured in 3.5%NaCl solution with different activation coal power and corrosion time.Test result showed that concrete surface chloride concentration increased with the increase of corrosion time,and it tending towards stability with the increase of corrosion time.Concrete surface chloride concentration value is first increased then decreased with the increased of activation coal power amount.When activation coal power reached 30%,its value is reached minimum.The model of index between concrete surface chloride concentration and activation coal power amount is constructed,and the model is verified.The result showed that a good agreement exists between a computer simulating results and experimental results,which can be used as concrete surface chloride concentration,and can be used as theory basis on concrete structure life with different activation coal power.
引文
[1]潘攀.煤渣及其作为混凝土掺合料的研究[D].广州:暨南大学,2011.
[2]潘攀,欧阳东,易成波.煤渣粉对高性能混凝土性能的影响[J].混凝土与水泥制品,2011(6):19-22.
[3]张金山,宋丽萍,颜春军.包头第三热电厂煤渣综合利用研究与实践[J].矿产综合利用,2011(2):40-43.
[4]普通混凝土力学性能试验方法标准:GB/T 50081-2002[S].北京:中国建筑工业出版社,2003.
[5]MUM TAZ K,MICH EL G.Chloride-induced corrosion of reinforced concrete bridge decks[J].Cement and Concrete Research,2002(32):139-143.
[6]胡蝶,麻海燕,余红发.矿物掺合料对混凝土氯离子结合能力的影响[J].硅酸盐学报,2009,37(1):129-134.
[7]张立明,余红发.干湿循环次数对混凝土表观氯离子扩散系数的影响[J].湖南大学学报(自然科学版),2014,32(3):25-30.
[8]赵羽习,王传坤,金伟良,等.混凝土表面氯离子浓度时变规律试验研究[J].土木建筑与环境工程,2010,42(3):8-13.
[9]李长成,张立明,沈艳东.盐湖环境下混凝土表面氯离子浓度的时变性研究[J].混凝土,2014(10):41-43.
[10]肖卫,余红发,翁智财,等.环境类型与氯盐浓度对矿渣混凝土表面氯离子浓度的影响[J].硅酸盐通报,2015,34(1):1-6.
[11]达波,余红发,胡蝶,等.海洋环境下矿渣混凝土的表面氯离子浓度规律[J].硅酸盐通报,2014,33(5):1058-1063.
[12]P ETCHERDCHOO A.Time dependent models of apparent diffusion coefficient and surface chloride for chloride transport in fly ash concrete[J].Construction and Building Materials,2013,38(1):497-507.
[13]SAFEHIAN M,RAMEZANIANPOUR A A.Assessment of service life models for determination of chloride penetration into silica fumeconcrete in the severe marine environmental condition[J].Construction and Building Materials,2013(48):287-294.
[2]潘攀,欧阳东,易成波.煤渣粉对高性能混凝土性能的影响[J].混凝土与水泥制品,2011(6):19-22.
[3]张金山,宋丽萍,颜春军.包头第三热电厂煤渣综合利用研究与实践[J].矿产综合利用,2011(2):40-43.
[4]普通混凝土力学性能试验方法标准:GB/T 50081-2002[S].北京:中国建筑工业出版社,2003.
[5]MUM TAZ K,MICH EL G.Chloride-induced corrosion of reinforced concrete bridge decks[J].Cement and Concrete Research,2002(32):139-143.
[6]胡蝶,麻海燕,余红发.矿物掺合料对混凝土氯离子结合能力的影响[J].硅酸盐学报,2009,37(1):129-134.
[7]张立明,余红发.干湿循环次数对混凝土表观氯离子扩散系数的影响[J].湖南大学学报(自然科学版),2014,32(3):25-30.
[8]赵羽习,王传坤,金伟良,等.混凝土表面氯离子浓度时变规律试验研究[J].土木建筑与环境工程,2010,42(3):8-13.
[9]李长成,张立明,沈艳东.盐湖环境下混凝土表面氯离子浓度的时变性研究[J].混凝土,2014(10):41-43.
[10]肖卫,余红发,翁智财,等.环境类型与氯盐浓度对矿渣混凝土表面氯离子浓度的影响[J].硅酸盐通报,2015,34(1):1-6.
[11]达波,余红发,胡蝶,等.海洋环境下矿渣混凝土的表面氯离子浓度规律[J].硅酸盐通报,2014,33(5):1058-1063.
[12]P ETCHERDCHOO A.Time dependent models of apparent diffusion coefficient and surface chloride for chloride transport in fly ash concrete[J].Construction and Building Materials,2013,38(1):497-507.
[13]SAFEHIAN M,RAMEZANIANPOUR A A.Assessment of service life models for determination of chloride penetration into silica fumeconcrete in the severe marine environmental condition[J].Construction and Building Materials,2013(48):287-294.