氯化钡和聚乙烯醇复掺改性石膏正交试验研究

硅酸盐通报 ›› 2017, Vol. 36 ›› Issue (9): 3144-3149.

氯化钡和聚乙烯醇复掺改性石膏正交试验研究

温久然;耿飞;高妮;刘开平

长安大学材料科学与工程学院,西安,710061;陕西铁路工程职业技术学院,渭南,714000

出版日期:2017-09-15 发布日期:2021-01-18
基金资助:
陕西省自然科学基础研究计划(2017JM5146)%新疆兵团工业科技攻关项目(2014BA017)%新疆兵团科技支疆计划项目(2014AB027)

Orthogonal Test of Modified Gypsum by Barium Chloride and Polyvinyl Alcohol

WEN Jiu-ran;GENG Fei;GAO Ni;LIU Kai-ping

Online:2017-09-15 Published:2021-01-18

摘要/Abstract

摘要： 采用正交试验研究了氯化钡和聚乙烯醇(PVA)复掺改性石膏复合胶凝材料的力学性能、吸水率和耐水性,并分析了改性机理.研究发现,氯化钡掺量为15%,水胶比为0.53,PVA掺量为3%时,石膏基复合胶凝材料28 d抗折软化系数最高;水胶比为0.53,氯化钡掺量为20%,PVA掺量为2%时,石膏基复合胶凝材料28 d抗压软化系数最高.通过XRD和SEM分析发现:复掺改性剂可以改变其微观形貌、减少孔隙率、使晶体结构变得密实.

关键词: 建筑石膏;复合胶凝材料;改性;强度;耐水性

Abstract: By adopting the method of orthogonal test , the mechanical properties , water absorption and water-resistant property of composite cementitious materials based on modified gypsum by barium chloride and PVA were studied.The results show that when the ratio of water to binder is 0.53, barium chloride is 15%, PVA is 3%, its softening coefficient of flexural at 28 d reaches the highest .Moreover , when the ratio of water to binder is 0.53, barium chloride is 20% and PVA is 2%, its softening coefficient of compressive at 28 d reaches the highest .The analysis on XRD and SEM show that the modifiers can change microstructures , reduce the porosity and densify the crystal structure .

Key words: building gypsum;composite cementitious material;modification;strength;water resistance

中图分类号:

TQ177.3+77

温久然;耿飞;高妮;刘开平. 氯化钡和聚乙烯醇复掺改性石膏正交试验研究[J]. 硅酸盐通报, 2017, 36(9): 3144-3149.

WEN Jiu-ran;GENG Fei;GAO Ni;LIU Kai-ping. Orthogonal Test of Modified Gypsum by Barium Chloride and Polyvinyl Alcohol[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2017, 36(9): 3144-3149.