蒋 俊,李 军,牛云辉,卢忠远,晏云华,蔡 攀
蒋俊,李军,牛云辉,等.矿物掺合料对超轻泡沫混凝土气孔结构及性能的影响[J].混凝土与水泥制品,2019(6):59-63.
JIANG J,LI J,NIU Y H,et al.Effects of Mineral Admixture on Air-void Structure and Performance of Ultra-lightweight Foamed Concrete[J].China Concrete and Cement Products,2019(6):59-63.
矿物掺合料对超轻泡沫混凝土气孔结构及性能的影响
蒋 俊,李 军,牛云辉,卢忠远,晏云华,蔡 攀
蒋俊,李军,牛云辉,等.矿物掺合料对超轻泡沫混凝土气孔结构及性能的影响[J].混凝土与水泥制品,2019(6):59-63.
JIANG J,LI J,NIU Y H,et al.Effects of Mineral Admixture on Air-void Structure and Performance of Ultra-lightweight Foamed Concrete[J].China Concrete and Cement Products,2019(6):59-63.
摘 要:采用物理发泡工艺制备了孔隙率大于90%的超轻泡沫混凝土,结合Image-pro plus、热分析及扫描电镜等手段对硬化超轻泡沫混凝土气孔结构及微观结构进行了表征,同时研究并对比了粉煤灰与矿粉对泡沫混凝土硬化性能的影响。研究表明:粉煤灰与矿粉取代水泥增大了试样气孔孔径,但对导热系数影响不明显;矿粉可改善试样抗压强度,当矿粉取代20%的水泥时,试样干密度为165.2 kg/m3,孔隙率为93.0%,56 d抗压强度可提升至0.47 MPa。
Abstract: Ultra-lightweight foamed concrete with a porosity greater than 90% was prepared by pre-foaming method.The air-void structure and microstructure of hardened samples were characterized by Image-pro plus, SEM and TG, and the effect of fly ash and granulated blast furnace slag on hardened properties of foamed concrete was studied and compared. The results indicate that the replacement of cement with fly ash or granulated blast furnace slag increases air-void size, but has slight effect on the thermal conductivity of foamed concrete. Granulated blast furnace slag can be used to improve compressive strength of sample. When the slag replaces 20% cement, the dry density of the sample is 165.2 kg/m3,the porosity is 93.0%, and the 56 d compressive strength of the foamed concrete can increase to 0.47 MPa.
版权所有:中国混凝土与水泥制品网 苏ICP备10086386号 网站建设:中企动力 苏州