超轻水泥基发泡混凝土抗冻融性能试验研究  

Experimental study on the performance of freezing-thawing resistance of ultralight foam concrete

作　　者：冯扣宝 王路明[1,2] 蒋蕾[1] 王滌非 姜松[1] 

机构地区：[1]盐城工学院材料工程学院,江苏盐城224051 [2]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《混凝土》2015年第12期38-42,共5页Concrete

基　　金：江苏省产学研联合创新资金项目(SBY201320559)

摘　　要：采用快速冻融试验来探索冻融循环次数对超轻水泥基发泡混凝土抗冻融性能的影响,并结合微观结构对冻融机理进行了讨论。研究结果表明:超轻水泥基发泡混凝土的抗冻融性能较差,仅6次冻融就使得结构被破坏,其冻融破坏过程实质是孔壁的冻融破坏过程,是孔壁内水化产物结构由密实状态转变成疏松状态,伴随孔壁裂缝的增多与发展的物理破坏过程。We used rapid freezing and thawing method to explore the performance of freezing - thawing resistance of ultralight foam concrete under different times of freezing - thawing cycles and discussed the freezing - thawing mechanism combining with microscopic structure.The results show that the performance of freezing - thawing resistance of ultralight foam concrete is poor. Specimen＇structure were destroyed when only withstanded six times of freezing - thawing cycles. The essence of freezing - thawing damage process is the process of freezing - thawing damage of pore walls. The structure of hydration products within the pore walls turned from dense state in- to a loose state.It proved to be a physical destruction process with the increasing of the pore walls＇cracks.

关 键 词：发泡混凝土 冻融循环 强度损失 质量损失 微观结构 

分 类 号：TU528.01[建筑科学—建筑技术科学]