【摘要】：以超細粉煤灰和鋼渣超微粉為主要原料,配加少量水泥和鋁粉發(fā)泡劑制備發(fā)泡混凝土試塊。實驗系統(tǒng)考察了不同水灰比、發(fā)泡劑摻量、發(fā)泡溫度對發(fā)泡混凝土試塊的絕干密度、抗壓強度、吸水率和孔隙率的影響。結(jié)果表明,鋁粉發(fā)泡劑摻量從1‰增加到7‰,所得試塊的絕干密度和抗壓強度分別降低36%和84%;而對應的吸水率和孔隙率增加幅度分別高達79%和30%。水灰比從0.65增加到0.95,所得試塊的絕干密度和抗壓強度分別降低26%和82%;而對應的吸水率和孔隙率均出現(xiàn)"先增后減"趨勢,其中吸水率增加幅度為34%,降低幅度為24%;孔隙率增加幅度為18%,降低幅度為9%。發(fā)泡溫度從25℃增加到90℃時,試塊的絕干密度和抗壓強度整體上呈"先降后升"趨勢,絕干密度降幅約為30%,升幅約為60%;抗壓強度降幅為50%,升幅高達140%。優(yōu)化后的實驗條件為:鋁粉摻量1‰~3‰、水灰比65%~75%、發(fā)泡溫度40℃左右。試塊抗壓強度與絕干密度隨制備條件變化幅度不一致,這說明有可能通過制備工藝優(yōu)化獲得"高強度、低密度"的發(fā)泡混凝土產(chǎn)品。
[Abstract]:Superfine fly ash and steel slag ultrafine powder were used as the main raw materials, and a small amount of cement and aluminum powder foaming agent were added to prepare the foamed concrete test block. The effects of water cement ratio, foaming agent content and foaming temperature on the dry density, compressive strength, water absorption and porosity of foamed concrete were systematically investigated. The results show that when the amount of foaming agent increases from 1 鈥，

本文編號：2235914