碳酸锂和超细矿物掺合料对快硬硫铝酸盐水泥性能的影响  

Effects of Lithium Carbonate and Ultrafine Mineral Admixture on the Performance of Fast-hardening Sulfoaluminate Cement

作　　者：谭波[1,2] 王静[1,2] 明阳 骆俊晖[3] TAN Bo;WANG Jing;MING Yang;LUO Jun-hui(College of Civil Engineering and Architectural,Guilin University of Technology,Guilin 541004,China;Guangxi Key Laboratory of Building New Energy and Energy Conservation,Guilin University of Technology,Guilin 541004,China;Guangxi Beitou Traffic Maintenance Technology Group Co.,Ltd.,Nanning 530029,China)

机构地区：[1]桂林理工大学土木与建筑工程学院,桂林541004 [2]桂林理工大学,广西建筑新能源与节能重点实验室,桂林541004 [3]广西北投交通养护科技集团有限公司,南宁530029

出　　处：《科学技术与工程》2023年第8期3432-3437,共6页Science Technology and Engineering

基　　金：广西自然科学基金(2020GXNSFBA297034)。

摘　　要：为了研究碳酸锂(Li_(2)CO_(3))和超细矿物掺合料(ultrafine mineral admixture,UMA)对快硬硫铝酸盐水泥(R·SAC)性能的影响。以凝结时间和力学性能为宏观指标,X射线衍射(X-ray diffraction,XRD)和扫描电子显微镜(scanning electron microscope,SEM)测试为基础,探讨了Li_(2)CO_(3)和UMA对R·SAC凝结时间、力学性能、水化产物种类和微观形貌的影响规律。结果表明:Li_(2)CO_(3)不仅可以有效提高R·SAC主要水化产物钙矾石的生成速率,而且还可以改变其微观形貌,显著缩短R·SAC的凝结时间;Li_(2)CO_(3)虽然改变了R·SAC的水化进程,但对其水化产物的种类并无影响;UMA不仅可以改善R·SAC胶砂界面过渡区力的学性能,而且同样可以有效缩短R·SAC凝结时间,同时对胶砂后期强度倒缩起到补偿作用。To investigate the effect of lithium carbonate(Li_(2)CO_(3))and ultrafine mineral admixture(UMA)on the performance of fast-hardening sulfoaluminate cement(R·SAC).The effects of Li_(2)CO_(3)and UMA on the setting time,mechanical properties,hydration product types and microscopic morphology of R·SAC were investigated based on X-ray diffraction(XRD)and scanning electron microscope(SEM)tests with setting time and mechanical properties as macroscopic indicators.The results show that Li_(2)CO_(3)can not only effectively improve the generation rate of Aft,the main hydration product of R·SAC,but also change its microscopic morphology and significantly shorten the setting time of R·SAC.Although Li_(2)CO_(3)changes the hydration process of R·SAC,it has no effect on the types of hydration products.UMA can not only improve the academic properties of the transition zone force at the interface of R·SAC colloidal sand,but also effectively shorten the setting time of R·SAC.And it can also effectively shorten the setting time of R·SAC,and at the same time play a compensating role in the later strength inversion of the colluvium.

关 键 词：碳酸锂 凝结时间 力学性能 水化产物 

分 类 号：TU528[建筑科学—建筑技术科学]