摘要
文章利用水工混凝土试验(5%Na2SO4盐冻环境),定量分析了冻融循环次数与混凝土抗压强度、相对动弹性模量、质量损失之间的关系,并结合试验数据建立函数关系式。试验表明:盐冻环境下不同粉煤灰掺量的水工混凝土抗压强度、相对动弹性模量和质量损失均明显高于水冻环境,抗压强度与相对动弹性模量总体呈线性变化;依据强度损失率推导出相对动弹性模量≤75%作为新的冻融评价标准,可为盐冻环境损伤掺粉煤灰水工混凝土性能提供一定参考。
In this paper,the relationship between the number of freezing-thawing cycles and the mass loss of concrete compressive strength relative dynamic elastic modulus is quantitatively analyzed by using hydraulic concrete test(5%Na2SO4 salt-frozen environment),and the function formula is established based on the test data.The results show that the compressive strength relative dynamic elastic modulus and mass loss of hydraulic concrete with different fly ash content in salt-freezing environment are obviously higher than those in water-freezing environment,and the compressive strength and relative dynamic elastic modulus change linearly in general;based on the strength loss rate,the relative dynamic elastic modulus≤75%is deduced as a new freezing-thawing evaluation standard,which can provide a certain reference for the performance of hydraulic concrete mixed with fly ash in salt-frozen environment damage.
作者
王兴
WANG Xing(Beipiao Urban Water Conservancy Planning, Investigation and Design Institute,Chaoyang 122100, China)
出处
《黑龙江水利科技》
2022年第3期13-16,共4页
Heilongjiang Hydraulic Science and Technology
关键词
盐冻环境
掺粉煤灰
性能影响
水工混凝土
salt frozen environment
fly ash
performance impact
hydraulic concrete
作者简介
王兴(1986-),男,辽宁朝阳人,工程师,研究方向为中小型水库除险加固、河道治理、小型农田水利。
