【摘要】 对经过0%σ_c,50%σ_c,65%σ_c,80%σ_c（压缩强度极限）4种载荷等级循环加载后的单掺粉煤灰、单掺矿粉和复合掺料混凝土进行吸水性试验研究。观察其表面吸水概貌,分析载荷等级对吸水高度和吸水率参数的影响。结果表明,当载荷小于50%σ_c时,孔隙结构发生弹性变形,微裂纹发展缓慢;当载荷在50%σ_c⁶5%σ_c范围内,混凝土试件中出现少数裂纹;当载荷大于65%σ_c时,混凝土试件中出现较多数贯穿裂纹;随着载荷等级增大,混凝土的吸水高度和吸水率明显增大,吸水高度h与t^1/2呈负指数关系。更多还原

【Abstract】 Tests for concrete with fly ash,concrete with slag,concrete with flash and slag after cyclic loading of four different load level which were 0%σ_c,50%σ_c,65%σ_c,80%σ_c（σ_c is compressive strength limit） were conducted.The water absorption of surface was observed and the influence of load level on suction head and water absorption rate.The result showed that:When the load is smaller than 50%σ_c,pore structure produces elastic deformation and micro cracks develops slowly.When the load is between 50%σ_c and 65%σ_c a few of cracks in concrete specimens appear.When the load is bigger 65%σ_c,most penetrating cracks appear.As the load level increased,the suction head,water absorption rate and porosity are increased significantly.Power exponent can describe the relation between suction head h and t^1/2.更多还原