提高建筑石膏防水性能和表面硬度的研究  

Study on Improving Waterproof Property and Surface Hardness of Structural Gypsum Product

作　　者：徐亚丽[1] 刘东辉[1] 惠泊宁[1] 

机构地区：[1]昆明理工大学化学工程学院,昆明650224

出　　处：《硅酸盐通报》2012年第1期62-66,共5页Bulletin of the Chinese Ceramic Society

摘　　要：考察了防水剂(实验室自制)、PVA、BPO等外加剂对建筑石膏样品的抗折强度、吸水率及吸水后表面硬度的影响。结果表明:防水剂添加量1.25%,PVA添加量0.8%,BPO添加量0.24%,可制得抗折强度9.54 MPa,24 h吸水率5.32%,吸水后表面硬度3.0的试样,并且该试样浸泡72 h后仍可在流动水下冲刷4 h,表面硬度基本不变。The rupture strength,surface hardness and 24 h water absorption of gypsum product was studied by doping in additive agent as water repellent,PVA and BPO agent.The results showed that the optimum condition was as follow： the water repellent loading is 1.25%,the PVA loading is 0.8% and the BPO loading is 0.24%.The rupture strength of gypsum sample is 9.54 MPa,24 h water absorption rate is 5.32% and the surface hardness of is 3.0 after water absorption.And the sample 72 h immersion in flowing water can wash 4 h the surface hardness is essentially the same.

关 键 词：建筑石膏 抗折强度 吸水率 表面硬度 

分 类 号：TD98[矿业工程—选矿]