多步搅拌工艺对高性能混凝土强度和抗渗性的影响  

Influence by multi-step mixing technology to the strength and anti-permeability of high performance concrete

作　　者：付向红[1] 阎利[1] 

机构地区：[1]安阳工学院土木与建筑工程学院,河南安阳455000

出　　处：《混凝土》2013年第9期158-160,共3页Concrete

基　　金：河南省科技计划重点攻关项目(102102310311)

摘　　要：多步搅拌混凝土工艺指多次投料多次搅拌的施工工艺。在相同材料、相同配合比情况下采用不同的多步搅拌工艺进行强度试验和抗渗性试验,得出多步搅拌均能有效提高混凝土的强度和抗渗性能,且水泥裹砂石法改善混凝土性能最好。在减少水泥用量5%、10%、15%的新混凝土配比情况下,进行混凝土强度和抗渗性试验,得出减少水泥用量10%时混凝土强度和抗渗性与原配比一次搅拌混凝土相当。所以水泥裹砂石法搅拌工艺在保证强度和抗渗性的情况下可以节省水泥10%,具有较高的经济效益。Concrete multi-step mixing technology means the construction technology of multi-step batch charging and multi-step stir- ring.The test about strength and anti-permeability in the same material and the same proportioning using different multi-step stirring tech- nology could draw all multi-step mixings could improve effectively the strength and anti-permeability of the concrete and cement wrapped sand method improve the concrete performance best.The test about strength and anti-permeability reducing the dosage of cement by 5%, 10%, 15% of the proportion of new concrete,it was concluded that strength and anti-permeability were correspond reducing the cement dosage 10% to one-mixing using the original proportioning.So cement wrapped sand method could save 10% in guaranteed strength and anti-permeability, it had high economic benefit.

关 键 词：多步搅拌 强度 抗渗性 水泥裹砂石法 经济分析 

分 类 号：TU528.01[建筑科学—建筑技术科学]