摘要
试验测试了标养(20℃)及低、负温(10℃、5℃、-3℃)养护条件下粉煤灰和矿粉的绝对活性值和相对活性值,分析了养护温度对粉煤灰和矿粉活性指数的影响规律。结果表明:粉煤灰的绝对活性值在7 d龄期之前随着养护温度的降低逐渐减小,7 d龄期之后,随着养护温度的降低先增大后减小;矿粉的绝对活性值在3 d龄期之前随着养护温度的降低逐渐减小,3 d龄期之后,随着养护温度的降低先增大后减小。随着龄期的增长,粉煤灰的绝对活性值在标养条件下变化不大,在低、负温养护下逐渐增大,矿粉的绝对活性值随着龄期的增长逐渐增大。在同一龄期时,随着温度的降低,粉煤灰和矿粉的相对活性值逐渐减小;随着龄期的增长,粉煤灰的相对活性值在标养条件下变化不大,在低、负温下养护时逐渐增大;矿粉的相对活性值会随着龄期增长逐渐增大。
The absolute activity index and relative activity index of fly ash and slag were measured under the condition of standard curing（ 20 ℃） and low and negative temperature（ 10 ℃ 、5 ℃ 、-3 ℃）curing,the effect of curing temperature on the activity index of fly ash and slag was analyzed. The results show that the absolute activity value of fly ash decreases with the decrease of curing temperature before 7 d of age,after 7 d of age,with the decrease of curing temperature,it increases firstly and then decreases; The absolute activity value of slag decreased with the decrease of curing temperature before 3 d of age,after 3 d of age,with the decrease of curing temperature,it increases firstly and then decreases. With the increase of age,the absolute activity index of fly ash changed little under the condition of standard curing,and increases in low and negative temperature curing,the absolute activityvalue of slag increases with age. At the same age,the relative activity of fly ash and slag decreases with the decrease of temperature; With the growth of age,the relative activity value of fly ash changed little under the condition of standard curing,and gradually increased at low and negative temperature; The relative activity of the mineral powder increases with age.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2017年第10期3260-3264,3272,共6页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(51768033)
长江学者和创新团队发展计划滚动资助(IRT_15R29)
中国交建2016年创新平台建设应用基础研究(2016-ZJKJ-PTJS04)
兰州交通大学青年科学基金(2017015)
兰州交通大学优秀科研团队(201606)
甘肃省高校协同创新科技团队支持计划资助(2017C-08)
关键词
养护温度
矿物掺合料
活性指数
龄期
curing temperature
mineral admixture
activity index
age
