掺粉煤灰再生混凝土宏观及微观碳化性能研究
|
摘要
为了研究不同再生粗骨料掺量和不同粉煤灰掺量下再生混凝土的抗碳化性能以及经过一段时间碳化之后再生混凝土的性能变化,对不同粉煤灰掺量(0、20%、40%)与不同再生骨料掺量(0、50%、100%)的混凝土进行了室内碳化性能试验,并且对碳化前后的混凝土试件进行电镜扫描分析。研究表明:随着再生粗骨料与粉煤灰掺量的增加,再生混凝土的碳化深度增大,再生混凝土的碳化速度随着碳化时间的增长而降低,再生混凝土抗压强度越大,碳化深度越小,并根据试验结果进行拟合得出了经不同碳化时间后抗压强度与碳化深度之间的回归方程式。
In order to study the carbonation resistance of recycled concrete with different content of recycled coarse aggregate and different content of fly ash and the performance change of recycled concrete after a period of carbonation,this study carried out indoor carbonation test and electron microscope scanning analysis on samples with different content of fly ash(0%,20%,and 40%) and different content of recycled aggregate(0%,50%,and 100%).The results show that:the carbonation depth of recycled concrete increases with the increase of recycled coarse aggregate and fly ash content.The carbonation rate of recycled concrete decreases with the increase of carbonation time.The greater the compressive strength of recycled concrete,the smaller the carbonation depth,and the regression equation between compressive strength and carbonation depth after different carbonation time was obtained by fitting the experimental results.
In order to study the carbonation resistance of recycled concrete with different content of recycled coarse aggregate and different content of fly ash and the performance change of recycled concrete after a period of carbonation,this study carried out indoor carbonation test and electron microscope scanning analysis on samples with different content of fly ash(0%,20%,and 40%) and different content of recycled aggregate(0%,50%,and 100%).The results show that:the carbonation depth of recycled concrete increases with the increase of recycled coarse aggregate and fly ash content.The carbonation rate of recycled concrete decreases with the increase of carbonation time.The greater the compressive strength of recycled concrete,the smaller the carbonation depth,and the regression equation between compressive strength and carbonation depth after different carbonation time was obtained by fitting the experimental results.
引文
[1]吴从亮,高燕,谢国栋.再生粗骨料的研究与应用概述[J].混凝土世界,2017(11):54-57.
[2]范小平.废弃混凝土再生利用技术及其研究现状[J].建筑技术开发,2013,40(5):88-90.
[3]王军强,陈年和,蒲琪.再生混凝土强度和耐久性能试验[J].混凝土,2007(5):53-56.
[4]李亚杰,方坤河等.建筑材料[M].北京:中国水利水电出版社,2008,79.
[5]李俊兰.再生细骨料混凝土的性能及改善研究[D].徐州:中国矿业大学,2016.
[6]丁天庭,李启华,陈树东.再生混凝土的强度及耐久性能研究[J].硅酸盐通报,2017,36(3):846-850.
[7]SILVA R V,NEVES R,DE BRITO J,et al.Carbonation behaviour of recycled aggregate concrete[J].Cement and Concrete Composites,2015,62:22-32.
[8]THIERY M,DANGLA P,BELIN P,et al.Carbonation kinetics of a bed of recycled concrete aggregates:A laboratory study on model materials[J].Cement and Concrete Research,2013,46(4):50-65.
[9]肖文广,郭樟根,吴政鹏,等.再生混凝土抗碳化性能试验研究及理论分析[J].土木建筑与环境工程,2015,37(6):47-53.
[10]耿欧,张鑫,张铖铠.再生混凝土碳化深度预测模型[J].中国矿业大学学报,2015,44(1):54-58.
[11]朱世佳.再生骨料特性对再生混凝土强度以及碳化性能的影响作用分析[J].江西建材,2016,(11):1.
[12]唐清照.橡胶颗粒对再生混凝土强度和抗碳化性能影响[J].福建建筑,2016(10):92-94.
[13]霍洪磊.混凝土碳化特性及其与表面硬度的关系[J].硅酸盐通报,2016,35(5):1642-1646.
[14]ZHANG Jiake,SHI Caijun,LI Yake,et al.Influence of carbonated recycled concrete aggregate on properties of cement mortar[J].Construction and Building Materials,2015,98(15):1-7.
[15]李秋义,李倩倩,岳公冰,等.碳化作用对再生混凝土界面显微结构的影响[J].沈阳建筑大学学报(自然科学版),2017,33(4):629-636.
[2]范小平.废弃混凝土再生利用技术及其研究现状[J].建筑技术开发,2013,40(5):88-90.
[3]王军强,陈年和,蒲琪.再生混凝土强度和耐久性能试验[J].混凝土,2007(5):53-56.
[4]李亚杰,方坤河等.建筑材料[M].北京:中国水利水电出版社,2008,79.
[5]李俊兰.再生细骨料混凝土的性能及改善研究[D].徐州:中国矿业大学,2016.
[6]丁天庭,李启华,陈树东.再生混凝土的强度及耐久性能研究[J].硅酸盐通报,2017,36(3):846-850.
[7]SILVA R V,NEVES R,DE BRITO J,et al.Carbonation behaviour of recycled aggregate concrete[J].Cement and Concrete Composites,2015,62:22-32.
[8]THIERY M,DANGLA P,BELIN P,et al.Carbonation kinetics of a bed of recycled concrete aggregates:A laboratory study on model materials[J].Cement and Concrete Research,2013,46(4):50-65.
[9]肖文广,郭樟根,吴政鹏,等.再生混凝土抗碳化性能试验研究及理论分析[J].土木建筑与环境工程,2015,37(6):47-53.
[10]耿欧,张鑫,张铖铠.再生混凝土碳化深度预测模型[J].中国矿业大学学报,2015,44(1):54-58.
[11]朱世佳.再生骨料特性对再生混凝土强度以及碳化性能的影响作用分析[J].江西建材,2016,(11):1.
[12]唐清照.橡胶颗粒对再生混凝土强度和抗碳化性能影响[J].福建建筑,2016(10):92-94.
[13]霍洪磊.混凝土碳化特性及其与表面硬度的关系[J].硅酸盐通报,2016,35(5):1642-1646.
[14]ZHANG Jiake,SHI Caijun,LI Yake,et al.Influence of carbonated recycled concrete aggregate on properties of cement mortar[J].Construction and Building Materials,2015,98(15):1-7.
[15]李秋义,李倩倩,岳公冰,等.碳化作用对再生混凝土界面显微结构的影响[J].沈阳建筑大学学报(自然科学版),2017,33(4):629-636.