不同矿物掺合料对混凝土早期强度和工作性能影响的研究  

Study on the influence of strength and workability of concrete owing to different mine admixtures

作　　者：王立久[1] 董晶亮[1] 谷鑫[1] 

机构地区：[1]大连理工大学建设工程学部,辽宁大连116024

出　　处：《混凝土》2013年第4期1-3,共3页Concrete

基　　金：辽宁省自然科学基金项目(20062147)";十一五"国家科技支撑计划重大项目(2006BAJ04A04)

摘　　要：研究了3种不同矿物掺合料(硅灰、矿粉、粉煤灰)和不同水胶比对混凝土早期强度和工作性能的影响。试验结果表明:硅灰、矿粉和粉煤灰会不同程度的降低混凝土的坍落度,但是能提高混凝土的黏聚性和保水性;硅灰会降低混凝土的早期强度,但随着水胶比的增大其抗压强度会增大。粉煤灰能提高混凝土的早期抗压强度,但随水胶比的增大其早期抗压强度会降低。在水胶比较小时矿粉会降低混凝土的早期抗压强度,但是水胶比较大时会提高混凝土的早期抗压强度。The influence of early-stage strength and workability of concrete owing to the three different mine admixtures （silicon powder, slag, fly ash ）and different water-binder ratios were studied.The experimental results showed that：silicon ash, slag and fly ash would significantly reduce the slump of concrete,but could improve the cohesiveness and water-retention capacity of concrete;silica powder would reduce the early-stage strength of concrete,but with the increase of the water-binder ratio the compressive strength increases.Fly ash could improve the early-stage compressive strength of concrete.But with the increase of water-binder ratio the early-stage compressive strength decrease.When the water-binder ratio was small, the slay would reduce the early-stage compressive strength of the concrete, but when the water-binder ratio increases, the early-stage compressive strength of concrete would improve.

关 键 词：硅灰 矿粉 粉煤灰 抗压强度 水胶比 坍落度 

分 类 号：TU528.01[建筑科学—建筑技术科学]