标养条件下掺固硫灰活性粉末混凝土的耐久性初探  

Durability of reactive pow der concrete with circulating fluidized bed combustion fly ash

作　　者：张磊[1,2] 吕淑珍 王婷[1] ZHANG Lei;Lü Shuzhen;WANG Ting(Shaanxi Railway Institute,Weinan 714000,China;Shaanxi Engineering Laboratory of High Performance Concrete,Weinan 714000,China;School of Materials Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]陕西铁路工程职业技术学院,陕西渭南714000 [2]陕西省高性能混凝土工程实验室,陕西渭南714000 [3]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《混凝土》2018年第9期97-99,共3页Concrete

基　　金：陕西铁路工程职业技术学院研究生基金项目(KY2016-35);国家科技支撑计划(2011BAA04B04)

摘　　要：主要研究在标准养护条件下工业副产物固硫灰对活性粉末混凝土抗冻融循环、抗碳化以及抗硫酸盐侵蚀等性能。试验结果表明:掺有固硫灰所制备的RPC表现出良好的抗碳化性能,28 d碳化深度为0;冻融循环进行到350次时,RPC具有较好的抗冻性能;在浓度为5%的Na_2SO_4溶液中浸泡28 d时,RPC表现出较好的抗硫酸盐侵蚀性能。综上可得,利用固硫灰的膨胀优势,可以提高混凝土的密实性,改善混凝土的微观结构,从而提高混凝土的耐久性。RPC with best circulating fluidized bed combustion fly ash after curing under standard condition for 28 d was used to test its durability,such as its resistance to freezing-thawing cycles,anti-carbonation and sulphate attack.The results of anti-carbonation test show RPC has good anti-carbonation performance,the carbonation depth remain zero when carbonation for 28 d.The mass loss of RPC keep zero after freezing-thawing cycles to 350 times,this results also show RPC has good freezing-thawing resistance.RPC also show better resistance to sulphate erosion when soaked in different concentrations of 5%Na2SO4 solution for a month.Moreover,CFBC fly ash is good to improve the micro-structure and durability of concrete by making full use of its expansibility.

关 键 词：活性粉末混凝土 抗冻融循环 抗碳化 抗硫酸盐侵蚀 耐久性 

分 类 号：TU528.064[建筑科学—建筑技术科学]