延迟拆模对CFB脱硫渣-水泥胶砂性能的影响  

Effect of delayed demoulding on the properties of circulating fluidized bed desulfurization slag-cement mortar

作　　者：程志[1] 裴晓波 韩涛[2] 侯华[2] 刘兰[1] CHENG Zhi;PEI Xiaobo;HAN Tao;HOU Hua;LIU Lan(School of Science,North University of China,Taiyuan 030051,China;School of Materials Science and Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学理学院,山西太原030051 [2]中北大学材料科学与工程学院,山西太原030051

出　　处：《四川建筑科学研究》2019年第5期88-93,共6页Sichuan Building Science

基　　金：山西省研究生教育创新项目(2016163);山西省应用基础研究计划项目(201601D202048)

摘　　要：为了抑制CFB脱硫渣水化产生的膨胀,并提高试件的抗压强度,采用1 d、3 d、7 d不同龄期拆模,考虑细度、掺量和硫酸钠激发剂等影响因素,系统研究了延迟拆模对CFB脱硫渣水泥胶砂试件的线性膨胀率和抗压强度的影响规律,并进行了微观机理分析。研究表明:不同脱硫渣细度和掺量下,胶砂试件随拆模龄期延长,其线性膨胀率下降,抗压强度提高;掺入硫酸钠激发剂后,随着拆模龄期的延长,胶砂试件线性膨胀率下降的同时,其抗压强度也下降。In order to inhibit the expansion caused by the hydration of the Circulating Fluidized Bed(CFB)desulfurization slag and to improve the compressive strength of the test specimens,the linear expansion rate and compressive strength of CFB desulfurization slag-cement mortar specimens were studied systematically by using 1 d,3 d and 7 d age demoulding and considering the factors of fineness,dosage and sodium sulphide activator.Microscopic mechanism analysis was also carried out.The research shows that,under the different fineness and dosage of the desulfurization slag,the linear expansion rate of the mortar test specimens decreased with the extension of the demoulding age,and the compressive strength increased.After the sodium sulfate activator was added,the linear expansion rate of the mortar test specimens decreased and the compressive strength also decreased as the demoulding age increased.

关 键 词：延迟拆模 CFB脱硫渣 线性膨胀 抗压强度 

分 类 号：TU525[建筑科学—建筑技术科学]