流变性对高早强泡沫混凝土性能的影响  

Effect of rheological properties on the performance of high early strength foamed concrete

作　　者：凌建祥 董波 叶焕 韩意[2] LING Jianxiang;DONG Bo;YE Huan;HAN Yi(Bengbu Architectural Design and Research Institute Group Co.,Ltd.,Bengbu 233000,China;Anhui Science and Technology University,Bengbu 233000,China)

机构地区：[1]蚌埠市建筑设计研究院集团有限公司,安徽蚌埠233000 [2]安徽科技学院,安徽蚌埠233000

出　　处：《混凝土与水泥制品》2023年第7期70-74,共5页China Concrete and Cement Products

基　　金：安徽省住房城乡建设科学技术计划项目(2021-YF05);安徽科技学院企业委托项目(880602)。

摘　　要：为降低泡沫混凝土生产过程中的能耗,改善泡沫混凝土的性能,研究了流变性对高早强免蒸压泡沫混凝土发气效果和硬化后性能的影响。结果表明:当屈服应力超过200 Pa后,泡沫混凝土不再膨胀;高早强免蒸压泡沫混凝土的6 h抗压强度可以达到2.7 MPa,导热系数基本不大于0.20 W/(m·K);浆体的屈服应力偏小可能导致孔隙率(体积密度)相近的泡沫混凝土导热系数相差30%,抗压强度相差100%左右。In order to reduce the production energy consumption and improve the performance of foamed concrete,the effect of rheological properties on gas generation and hardening properties of high early strength non-autoclaved foamed concrete was studied.The results show that the foamed concrete no longer expands when the yield stress exceeds 200 Pa.The 6 h compressive strength of high early strength non-autoclaved foamed concrete can reach 2.7 MPa,while the thermal conductivity is no more than 0.20 W/(m·K).The lower yield stress can lead to a 30%difference in thermal conductivity and a 100%difference in compressive strength for foamed concretes with similar porosity(or volume density).

关 键 词：流变性 免蒸压 泡沫混凝土 导热系数 

分 类 号：TU528.2[建筑科学—建筑技术科学]