摘要
目的 针对低温条件下东北地区施工特点,研究了在不掺防冻剂的情况下,不同掺合料对C30幼龄期混凝土孔径分布的影响.方法:采用压汞法测试了在恒低温一次冻结和自然变低温多次冻结养护情况下幼龄期混凝土的孔径分布情况.结论:掺合料可以改善低温混凝土的内部结构,减少多害孔和有害孔的比例,提高少害孔和无害孔的比例;混凝土在恒低温-10℃养护条件下较之变低温-15℃~5℃养护条件下有害孔和多害孔所占比例高,少害孔和无害孔所占比例低.
This study researchs about the effects of mineral admixture on the pore size distribution of low-temperature concrete without antifreeze,with using mercury intrusion porosimetry (MIP) tests artificial freezing and natural freezing the pore size distribution of low-temperature concrete at different age.The result shows that admixture can reduce the porosity,compared with the low-temperature concrete without admixture.
出处
《低温建筑技术》
2014年第3期7-10,共4页
Low Temperature Architecture Technology
关键词
低温混凝土
掺合料
孔径分布
压汞法
low-temperature concrete
mineral admixture
pore size distribution
mercury intrusion porosimetry