原材料对泡沫混凝土吸水性能的影响研究  

Study on the influence of raw materials on water absorption of foamed concrete

作　　者：韩磊 李应权[1] 扈士凯[1] 陈志纯[1] 任强伟 黄文辉 HAN Lei;LI Yingquan;HU Shikai;CHEN Zhichun;REN Qiangwei;HUANG Wenhui(Technical Supervision and Research Center of the Building Materials Industry,Beijing 100024,China)

机构地区：[1]建筑材料工业技术监督研究中心,北京100024

出　　处：《混凝土与水泥制品》2024年第5期73-77,共5页China Concrete and Cement Products

摘　　要：通过测试吸水率、孔洞微观形貌,研究了矿物掺合料(矿渣粉、粉煤灰、硅灰)、聚合物乳液(氯丁胶乳液、苯丙乳液、硬质环氧乳液)、憎水剂(有机硅、硬脂酸钙)对泡沫混凝土吸水性能的影响,并对作用机理进行了阐述。结果表明:矿渣粉对吸水率的影响程度有限,粉煤灰可在一定程度上降低吸水率,硅灰的加入显著提高了吸水率;三种聚合物乳液对吸水率的影响程度由大到小依次为氯丁胶乳液>苯丙乳液>硬质环氧乳液;憎水剂能有效降低吸水率,其中硬脂酸钙的效果明显好于有机硅;憎水剂在合适掺量范围内能有效降低孔洞缺陷率,同时由于其本身具有较好的疏水特性,进而可显著降低材料的吸水率。The effects of mineral admixtures(slag powder,fly ash and silica fume),polymer emulsions(neoprene emulsion,styrene-acrylic emulsion and hard epoxy emulsion)and hydrophobic agents(silicone,calcium stearate)on water absorption of foamed concrete were studied by measuring water absorption and pore morphology,and the reasons were explained.The results show that the influence of slag powder on water absorption is limited,fly ash can reduce water absorption to a certain extent,and silica fume significantly increases water absorption.The influence degree of the three polymer emulsions on water absorption in turn is neoprene emulsion>styrene-acrylic emulsion>hard epoxy emulsion.Hydrophobic agents can effectively reduce water absorption,and the effect of calcium stearate is obviously better than that of silicone.The hydrophobic agent can effectively reduce the hole defect rate of pore-wall in a appropriate dosage range,in addition,it has a good hydrophobic property,the interaction of these two effects make the material show a low water absorption rate.

关 键 词：泡沫混凝土 吸水率 憎水剂 矿物掺合料 聚合物乳液 泡孔孔壁 

分 类 号：TU528.2[建筑科学—建筑技术科学]