石灰石粉掺量对混凝土耐久性能的影响  

Effect of Limestone Powder Admixture on the Durability Performance of Concrete

作　　者：孟祥杰 

机构地区：[1]重庆建研科之杰新材料有限公司,重庆402760

出　　处：《混凝土世界》2023年第6期41-43,共3页China Concrete

摘　　要：研究了不同石灰石粉掺量对混凝土工作性能、力学性能和耐久性能的影响。结果表明:当混凝土中石灰石粉掺量不超过60kg/m3时,混凝土具有良好的工作性能,其2h坍落扩展度为(450±10)mm;由于石灰石粉超细集料效应增加了结构的密实性,混凝土的28、56d抗压强度比石灰石粉掺量超过60kg/m3时混凝土的28、56d抗压强度高4MPa以上,混凝土的抗冻、抗碳化、抗氯离子渗透等耐久性能也相应地提高。The effects of different limestone powder content on the working performance,mechanical properties and durability of concrete were studied.The results showed that the limestone powder content in the concrete is not more than 60kg/m3,concrete has good working performance,and 2h expansion is(450±10)mm,the compactness of the structure is increased due to ultrafine aggregate effect,the 28d and 56d compressive strength of concrete is more than 4MPa when limestone powder less 60kg/m3,and the durability of concrete against frost,carbonation and chloride ion penetration is also improved accordingly.

关 键 词：石灰石粉 碳化深度 抗冻性能 抗氯离子渗透 

分 类 号：TU528[建筑科学—建筑技术科学]