摘要
为提高寒冷地区混凝土结构的抗冻性能,研究了掺加渗透结晶型防水剂以改善混凝土微观结构。通过与普通混凝土对比,进行抗压强度试验,揭示渗透结晶型混凝土的力学性能。通过冻融循环试验,并结合SEM微观测试分析,研究内掺渗透结晶防水剂混凝土抗冻性能并揭示其作用机理。结果表明:掺加渗透结晶型防水剂中的活性物质可以反应生成不溶性针状晶体,有利于孔隙的细化,提高混凝土的致密程度,从而提高混凝土的力学性能以及抗冻性能。
To enhance the frost resistance of concrete structure in cold areas,it used cementitious capillary crystalline waterproofing materials(CCCW)additives to improve the microstructure of concrete.Compared with ordinary concrete,the compressive strength test was conducted to reveal the mechanical performance of CCCW-based concrete.The frost resistance was studied by freeze-thaw cycling test and the mechanism was investigated by SEM.The results show that the reactive substance in CCCW formed insoluble needle-like products refine the pores structure in concrete.The density of CCCW-based concrete increases and thus enhances the mechanical performance and frost resistance.
作者
苟耀虎
余弦
范承宁
李福海
蒲励耘
李继芸
GOU Yaohu;YU Xian;FAN Chengning;LI Fuhai;PU Liyun;LI Jiyun(Sichuan Energy Construction Engineering Group Co.,Ltd.,Chengdu 610021,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)
出处
《混凝土》
CAS
北大核心
2023年第11期80-83,共4页
Concrete
基金
国家重点研发计划课题(2021YFB2600900)
四川省科技厅项目(2022NSFSC1095,2021YJ0545,2021JDTD0012)
国家自然科学基金(U2034205)。
关键词
渗透结晶型防水剂
混凝土
抗压强度
冻融循环
孔隙结构
capillary crystalline waterproofing materials additives
concrete
compressive strength
freeze-thaw cycling
pore structure
