C50、C60混凝土在盐溶液及荷载作用下损伤研究  

Damage research of C50 and C60 concrete under salt solution and load

作　　者：俞君宝[1,2] 呼梦洁[1,2] 杨鼎宜[2] 

机构地区：[1]扬州工业职业技术学院,江苏扬州225127 [2]扬州大学建筑科学与工程学院,江苏扬州225009

出　　处：《混凝土》2015年第11期17-20,共4页Concrete

基　　金：国家重点基础研究发展计划资助(2009CB623200);国家"十二五"国家科技支撑计划(2012BAJ20B01-06)

摘　　要：混凝土损伤是造成混凝土耐久性不足的一个重要因素。试验研究了C50、C60混凝土在硫酸盐、氯盐和荷载复合作用下损伤规律。研究表明:硫酸盐会对混凝土造成损伤,表现为混凝土动弹性模量呈现先增大后减小趋势。硫酸盐浓度越高,混凝土损伤速率越大;氯盐会阻碍硫酸盐的损伤作用,氯盐浓度越高,阻碍作用越明显;荷载作用延缓了受压区混凝土损伤,但作用不明显;荷载作用促进了受拉区混凝土的损伤,荷载越大促进作用越明显。The concrete damage is an important factor caused the lack of durability of concrete.The tests studied concrete damage law of C50 and C60 under the composite action of sulfate, chloride salt and load. Study indicates that sulfate can damage the concrete and concrete dynamic modulus of rendering first increases then decreases. Sulfate concentration is higher, the bigger the concrete damage rate.Chlorine salt prevents damage of sulfate and chlorine salt concentration is higher,the effect is obvious.Load delays the compressed zone of concrete damage, but the effect is not obvious.Load promotes the tensile zone of concrete damage and the greater the load, the more obvious role.

关 键 词：混凝土 动弹性模量 损伤 

分 类 号：TU528.01[建筑科学—建筑技术科学]