激发剂对掺合料-高贝利特硫铝酸盐水泥砂浆性能的影响  

Effect of Activator on Properties of High Belite Sulphoaluminate Cement Mortar with Admixture

作　　者：范昭昂 岳公冰 罗金垒 郭远新 李秋义[1,2] FAN Zhao-ang;YUE Gong-bing;LUO Jin-lei;GUO Yuan-xin;LI Qiu-yi(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China;School of Architecture Engineering,Qingdao Agriculture University,Qingdao 266109,China;Qingdao Qingjian Blue Valley New Materials Ltd.,Co.,Qingdao 266000,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]青岛农业大学建筑工程学院,山东青岛266109 [3]青岛青建蓝谷新型材料有限公司,山东青岛266000

出　　处：《混凝土与水泥制品》2022年第10期32-35,39,共5页China Concrete and Cement Products

基　　金：国家自然科学基金面上项目(51878366、51978353、52078261、51808310);国家自然科学基金青年科学基金项目(51808310);山东省自然科学基金项目(ZR2019PEE007、ZR2020ME036);青岛市科技惠民示范引导专项项目(20-3-4-10-nsh)。

摘　　要：基于掺矿粉、粉煤灰的复合胶凝材料体系,研究了自制激发剂SHSA对掺合料-高贝利特硫铝酸盐水泥砂浆的工作性、力学性能的影响,并通过微观测试分析了激发剂的作用机理。结果表明:掺加SHSA后,试件的流动度降低,凝结时间缩短;当掺合料掺量相同时,随着SHSA掺量的增加,掺加矿粉试件的28 d抗压强度提高,掺加粉煤灰试件的28 d抗压强度先增加后降低;随着SHSA掺量的增加,C-S-H凝胶数量增加,钙矾石排列更加紧密,浆体密实度增加,未水化的粉煤灰颗粒出现溶解现象,SHSA激发了掺合料的活性。Based on the admixture-high belite sulphoaluminate cement mortar mixed with mineral powder and fly ash,the self-made activator SHSA was used as the activator to systematically study the effects of activator on the workability and mechanical properties of the composite cementitious material system,and the mechanism of the activator was analyzed through microscopic tests.The results show that after adding SHSA,the fluidity of the specimen decreases and the setting time is shortened.When the amount of admixture is the same,with the increase of SHSA content,the 28 d compressive strength of the specimen mixed with mineral powder increases,and the 28 d compressive strength of the specimen mixed with fly ash first increases and then decreases.With the increase of SHSA content,the number of C-S-H gels increases,the ettringites are arranged more closely,the density of the slurry increases,and the unhydrated fly ash particles appeares to dissolve,and SHSA stimulates the activity of the admixture.

关 键 词：高贝利特硫铝酸盐水泥 矿物掺合料 激发剂 抗压强度 

分 类 号：TU528.1[建筑科学—建筑技术科学]