新型珍珠岩保温砂浆耐久性能研究  

Reaching on the durable properties of new pearlite thermal mortar

作　　者：王双超[1] 李柠旭 徐方[1] 阮景新 林秀根 周清辉 

机构地区：[1]中国地质大学(武汉)工程学院,湖北武汉430074

出　　处：《混凝土》2016年第4期110-114,共5页Concrete

基　　金：国家自然科学基金(51308518);中央高校基本科研业务费专项资金资助项目(CUGL150412);中国地质大学(武汉)大学生自主创新启航项目(1410491A16)

摘　　要：普通墙体珍珠岩保温砂浆在使用过程中易出现脆性大、抗裂及抗冻性能差等耐久性问题,为有效改善普通珍珠岩保温砂浆的相关问题,通过加入橡胶粉、丁苯乳液、聚酯纤维对其进行复合改性。通过正交试验方法,研究了新型珍珠岩保温砂浆的软化系数以及在15次冻融循环之后质量损失率和强度损失率等性能。试验结果表明:在橡胶粉掺量恒定的情况下,掺入15%丁苯乳液+0.15%聚酯纤维的保温砂浆比普通保温砂浆的软化系数提高了57.1%,质量损失率降低了40%左右,强度损失率降低了55%左右。通过砂浆的微观结构观察可得,丁苯乳液的掺入能够有效填充砂浆内部的宏观与微观缺陷,提高界面过渡区的密实程度。Regular pearlite mortar behaves badly such as high brittleness, poor crack resistance and impermeability at work. In order to solve the problem, we mix rubber powder, styrene - butadiene rubber and polyester together to change its performance. By adopting orthogonal test,reaching the softening resistance and frost resistance of the new pedite insulation mortar.The research results show that the thermal insulation mortar which added 15% styrene butadiene latex and 0.15% polyester fiber appears better performance.The softening coefficient improved 57.1% than ordinary insulation mortar. The mass loss rate reduced by 40% or so, and the strength loss rate reduced by 55% or so.The mixed styrene -butadiene emulsion can effectively talde the macro and micro defects, improving the rate of density in the inter facial transition zone.

关 键 词：保温砂浆 珍珠岩 橡胶粉 丁苯乳液 聚酯纤维 

分 类 号：TU528.041[建筑科学—建筑技术科学]