钢渣对碱激发偏高岭土材料强度影响分析  

Analysis of Influence of Steel Slag on Strength of Alkali-Activated Metakaolin

作　　者：季敏[1] 李红立[1] 皇甫双娥[2] Ji Min;Li Hongli;Huang-Fu Shuange(Chongqing Engineering Vocational and Technical College, Chongqing 402200;Faculty of Civil Engineering and Architecture, Kunming University of Science and Technology, Kunming, Yunnan 650500)

机构地区：[1]重庆工程职业技术学院,重庆402200 [2]昆明理工大学建筑工程学院,云南昆明650500

出　　处：《非金属矿》2019年第3期52-54,共3页Non-Metallic Mines

基　　金：重庆市教委科技研究项目(KJQN201803407);重庆市教委高等教育教学改革研究资助项目(183238);全国交指委教改课题(LQZZW2018211)

摘　　要：在水玻璃激发偏高岭土胶凝体系中,加入不同掺量的磨细钢渣,考察不同钢渣掺量对碱激发偏高岭土基复合胶凝材料的7 d抗折、抗压强度的影响,并对其影响机理进行分析。结果表明:随着钢渣掺量的增大,碱激发偏高岭土基复合胶凝材料的7 d抗折、抗压强度呈先增大后减小的趋势;当钢渣掺量在5%时,复合材料的7 d抗折强度达到最大值8.59 MPa,相较于空白组提高了10.2%;当钢渣掺量在7.5%时,复合材料的7d抗压强度达到最大值54.81 MPa,相较于空白组提高了20.9%;钢渣中的游离氧化钙与水反应生成氢氧化钙,对偏高岭土有一定的激发效果,进而提高碱激发偏高岭土基复合胶凝材料的力学强度。In the water glass-excited metakaolin clay system, different amounts of ground steel slag were added to investigate the effect of different steel slag content on the 7 d flexural and compressive strength of alkali-activated metakaolin-based composite cementitious materials. The mechanism of influence is analyzed. The results show that with the increase of steel slag content, the 7d flexural and compressive strength of alkali- activated metakaolin-based composite cementitious materials increases first and then decreases. When the amount of steel slag is 5%, the composites The 7 d flexural strength reached a maximum of 8.59 MPa, which was 10.2% higher than that of the blank group. When the steel slag content was 7.5%, the 7 d compressive strength of the composite reached a maximum of 54.81 MPa, which was improved compared with the blank group. 20.9%;the free calcium oxide in the steel slag reacts with water to form calcium hydroxide, which has a certain excitation effect on metakaolin, and then improves the mechanical strength of the alkali-activated metakaolin-based composite cementitious material.

关 键 词：偏高岭土 钢渣 抗折强度 抗压强度 机理分析 

分 类 号：TU526[建筑科学—建筑技术科学]