再生黏土砖粉-石灰石粉-水泥胶凝材料性能研究  

Research on properties of recycled clay brick powder-limestone powder-cement cementitious material

作　　者：陈高丰 高建明[1,2] 赵亚松 Chen Gaofeng;Gao Jianming;Zhao Yasong(School of Materials Science and Engineering,Southeast University,Nanjing 211189,China;Jiangsu Kep Laborato/of ConsPoction Material/,SovPieast University,Nating 211139,China)

机构地区：[1]东南大学材料科学与工程学院,南京211189 [2]东南大学江苏省土木工程材料重点实验室,南京211189

出　　处：《东南大学学报（自然科学版）》2020年第5期858-865,共8页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51578141);国家重点研发计划资助项目(2016YFE0118200).

摘　　要：采用再生黏土砖粉和石灰石粉共同取代部分水泥制备了复合胶凝材料,通过测试复合胶凝材料的抗压强度、水化放热、水化产物种类以及孔结构演变规律来研究其性能.结果表明:黏土砖粉-石灰石粉的掺入会降低胶砂抗压强度,但胶砂试件在90 d龄期时抗压强度比得到提高,提高砖粉掺量有利于后期强度的增长;黏土砖粉-石灰石粉的掺入可以有效地降低水泥水化的放热量;随着养护龄期的增长,复掺黏土砖粉和石灰石粉的试件中生成水化碳铝酸钙;黏土砖粉-石灰石粉的掺入增大了复合胶凝材料的孔隙率,但其填充效应以及水化后期发挥活性可以优化材料后期的孔结构.Composite cementitious material was prepared by replacing partial cement with recycled clay brick powder(CBP)and limestone powder(LP).Experiments were carried out to study composite cementitious material properties,such as compressive strength,heat evolution,hydration products,and pore structure evolution.Experimental results show that CBP-LP can reduce the compressive strength of the mortars but its compressive strength ratio is improved after 90 d.Increasing the amount of CBP is more conducive to the increase of the strength in the later period.The incorporation of CBP-LP can effectively reduce the hydration heat of cement.As the curing progresses,the samples mixed with CBP-LP can form calcium carboaluminate(Mc).The incorporation of CBP-LP increases the porosity of composite cementitious material,but its filling effect and activity in the later stage of hydration can optimize the pore structure.

关 键 词：再生黏土砖粉 石灰石粉 抗压强度 水化放热 水化产物 孔结构 

分 类 号：TU526[建筑科学—建筑技术科学]