菱苦土对轻烧白云石制备碱式硫酸镁水泥影响的研究  

Experimental Study on the Effect of Light-burned Magnesite Powder on Basic Magnesium Sulfate Cement Prepared by Light-burned Dolomite Powder

作　　者：陈远基 吴成友[1] 陈方宇[1] 陈聪 余红发[2] CHEN Yuan-ji;WU Cheng-you;CHEN Fang-yu;CHEN Cong;YU Hong-fa(School of Civil Engineering,Qinghai University,Xining 810016,China;Department of Civil Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]青海大学土木工程学院,西宁810016 [2]南京航空航天大学土木工程系,南京210016

出　　处：《硅酸盐通报》2018年第8期2506-2511,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51662035;U1407104);青海省科技基础条件平台(2018-ZJ-T01);青海大学大学生创新创业训练计划创业扶持项目(2017-CY-04)

摘　　要：采用内掺法,在以轻烧白云石粉为原料制备的碱式硫酸镁水泥(basic magnesium sulfate cement,BMSC)中添加不同掺量轻烧菱镁矿粉,并通过研究其凝结时间、抗压强度、抗折强度、流动度、水泥放热速率等,结合XRD、SEM分析其水化产物组成、微观形貌,分析轻烧菱镁矿粉的掺量对以轻烧白云石粉为原料制备的BMSC的影响。实验现象表明,在以轻烧白云石粉为原料制备的BMSC中添加轻烧菱镁矿粉能有效提高抗压强度和抗折强度,缩短凝结时间,提高其耐水性能,但其流动度下降。The internal blending method was adopted to control the effect of light-burned magnesite powder on basic magnesium sulfate cement(BMSC)prepared by light-burned dolomite powder.The setting time,compressive strength,flexural strength,fluidity,hydration-heat release rate,X-ray diffraction and scanning electron microscopy were adopted to assess the effects of light-burned magnesite powder on BMSC prepared by light-burned dolomite powder.The experimental results show that adding light-burned magnesite powder to BMSC prepared by light-burned dolomite powder can effectively improve the compressive strength and flexural strength,shorten its setting time and improve the water resistance,but the fluidity decreases.

关 键 词：碱式硫酸镁水泥 力学性能 凝结时间 

分 类 号：TU525[建筑科学—建筑技术科学]