硅酸盐通报2018，Vol.37Issue(3)：868-872,5.
稻草纤维碱萃取物对碱式硫酸镁水泥性能的影响
Effect of Straw Fiber Alkaline Extractives on Properties of Basic Magnesium Sulfate Cement
李振国 1余四文 1王仕坤 2王博 1刘博1
作者信息
- 1. 哈尔滨理工大学建筑工程学院,哈尔滨 150080
- 2. 安徽伟达路桥工程有限公司,安庆 246001
- 折叠
摘要
Abstract
The influence of straw fiber alkaline extractives on setting time, fluidity and strength of basic magnesium sulfate cement were studied.The phase composition of hydration products in harden cement were tested by XRD.The results show that water-solubles present in straw fiber decrease the fluidity and retard the setting time of cement, and the strength of cement in early period is reduced.The extracts present in straw fiber have an adverse effect on MgO hydration and the formation of[Mg(OH) (H2O)x]+formed.Therefore,the growth of 5Mg(OH)2· MgSO4· 7H2O(5· 1· 7)phase is inhibited and the development of the cement strength in early stage is slow.Comparing with the basic magnesium sulfate cement mixed with H2O,the NaOH solution accelerate the setting time, interfere the normal fluidity and strength development process of the cement.The content of Mg2+is reduced due to the forming of Mg(OH)2after the reaction between NaOH and MgSO 4, leading to the reduction of cement strength.关键词
碱式硫酸镁水泥/碱萃取物/凝结时间/流动度/强度/水化产物Key words
basic magnesium sulfate cement/alkaline extractive/setting time/fluidity/strength/hydration product分类
化学化工引用本文复制引用
李振国,余四文,王仕坤,王博,刘博..稻草纤维碱萃取物对碱式硫酸镁水泥性能的影响[J].硅酸盐通报,2018,37(3):868-872,5.
