摘要
文章运用试验的方法,从质量损失率、质量衰减规律、弹性模量损失和抗压强度损失的角度研究了硫酸盐侵蚀与冻融循环耦合作用下的水工混凝土耐久性。结果表明:试验初期硫酸盐侵蚀能够在一定程度上抑制水工混凝土冻融损伤,有利于提升其各项耐久性指标;而试验后期,硫酸盐与冻融循环耦合作用明显增大了各项耐久性指标的下降速度。水工混凝土表面摩擦系数受耦合作用变幅减小,但表层黏聚力降幅增大;耦合作用下,水胶比达到0.35时水工混凝土耐久性最优。
In this paper,the durability of hydraulic concrete under the coupling action of sulfate erosion and freezing-thawing cycle is studied from the point of view of the law of mass loss rate mass attenuation,elastic modulus loss and compressive strength loss.The results show that sulphate erosion can restrain freezing-thawing damage of hydraulic concrete to a certain extent in the initial stage of test,which is beneficial to improve its durability indexes;in the later stage of the test,the coupling effect of sulfate and freezing-thawing cycle obviously increased the decrease speed of durability indexes;the surface friction coefficient of hydraulic concrete decreases with coupling effect,but the drop of surface cohesion increases;when the water-binder ratio reaches 0.35,the durability of hydraulic concrete is the best.
作者
李欣然
LI Xin-ran(Liaoning Provincial Baishi Reservoir Management Bureau Limited Company,Chaoyang 122000, China)
出处
《黑龙江水利科技》
2022年第1期50-54,共5页
Heilongjiang Hydraulic Science and Technology
关键词
水工混凝土
硫酸盐侵蚀
冻融循环
耦合作用
耐久性能
hydraulic concrete
sulphate attack
freezing and thawing cycle
coupling
endurance quality
