摘要
本文研究了骨料掺量、砂率、养护温度、高温养护时间对粉煤灰地质聚合物混凝土抗压强度,以及劈拉强度、抗折强度、弹性模量、泊松比等力学性能。结果表明:粉煤灰地质聚合物混凝土的抗压强度随骨料掺量及砂率的增加先增大后减小,存在一个相对最优值;强度随养护温度的升高而增大,100℃时达到最大值,且强度增长在高温养护24 h内基本完成。粉煤灰地质聚合物混凝土早期强度较高,7 d以后强度增长较小;劈拉强度随着骨料掺量的增加而提高,抗折强度、弹性模量、泊松比都随骨料掺量的增加先增大后减小,掺量为70%时达到峰值。
The effects of aggregate content,sand ratio,curing temperature and high temperature period on the compressive strength,splitting tensile strength,flexural strength,elastic modulus and Poissons＇ s ratio of fly ash based geopolymer concrete were studied. The results show that the compressive strength with aggregate content and sand ratio increases at first and then decreases. There exists a relatively optimal value,at which the compressive strength reaches the maximum. Also,the compressive strength increases with the increase of curing temperature and reaches the maximum at 100 ℃. The strength increase has been completed within 24 h. The fly ash based geopolymer concrete has a high early strength and has a smaller increase after 7 d. Splitting strength increases with the increase of aggregate content. The flexural strength,elastic modulus and Poissons＇ s ratio increase at first and then decreases with the increase of aggregate content,and 70% is the relatively optimal content.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2014年第10期2723-2727,共5页
Bulletin of the Chinese Ceramic Society
关键词
粉煤灰地质聚合物
骨料掺量
砂率
养护温度
弹性模量
fly ash based geopolymer
aggregate content
sand ratio
curing temperature
elastic modulus
