气凝胶珍珠岩的制备及其在水泥基中的应用
2021-06-29孙玉清回丽丽赵娜王巧云
孙玉清 回丽丽 赵娜 王巧云



摘 要:针对传统气凝胶保温材料高成本、低强度的问题,提出用廉价膨胀珍珠岩和SiO2气凝胶共同作用,制备气凝胶膨胀珍珠岩复合保温材料,并对其制备工艺及性能进行试验。结果表明,保温砂浆添加剂对AEPM拌合物工作性能和物理力學性能有积极作用;提高AEPM的柔韧性和抗裂性能;HPMC、可再分散乳胶粉能够有效降低AEPM的导热系数。经过发泡和稳泡优化后, AEPM基本性能为:干密度235kg/m3;压缩强度0.55MPa;导热系数0.0472W/(m·K)
关键词:膨胀珍珠岩;气凝胶;保温砂浆;力学性能
中图分类号:TU528;TU55+1.34 文献标识码:A 文章编号:1001-5922(2021)05-0018-05
Preparation of Aerogel Perlite and Its Application in Cement Matrix
Sun Yuqing1,Hui Lili2, Zhao Na2,Wang Qiaoyun2
(1.Cangzhou Construction Project Quality Supervision Station of Hebei Province, Cangzhou 061000,China
2.Dayuan Jianye Group Co., Ltd., Cangzhou 061000,China)
Abstract:Aiming at the problem of high cost and low strength of traditional aerogel insulation materials, it is proposed to use cheap expanded perlite and SiO2 aerogel to prepare aerogel expanded perlite composite insulation materials, and their preparation process and performance test. The results show that the thermal insulation mortar additive has a positive effect on the working performance and physical and mechanical properties of AEPM mixture; improves the flexibility and crack resistance of AEPM; HPMC and redispersible emulsion powder can effectively reduce the thermal conductivity of AEPM. The basic properties of AEPM optimized by foaming and foam stabilization are as follows: dry density 235kg/m3; compressive strength 0.55MPa; thermal conductivity 0.0472W / (m·K).
Key words:expanded perlite; aerogel; thermal insulation mortar; mechanical properties
随着我国对节能标准的提高,对保温材料的保温要求也随之提高。但传统无机保温骨料的保温隔热材料因为导热系数大,吸湿性强的问题,使得无机保温材料的保温性能产生更不利的影响。为解决传统无机保温骨料性能差的问题,需要开发导热系数和吸水率较低的新型骨料。基于此,胡玲霞(2018)等考察纳米SiO2掺量对无机轻集料保温砂浆工作性能的影响,证实纳米SiO2掺量的增加会降低无机轻集料保温砂浆的干密度,导热系数[1];陈若山(2019)等人以膨胀珍珠岩和微珠保温砂岩为对象,通过实验法获得了不同骨料级配下膨胀玻化微珠无机保温砂浆,并寻找到最佳比例,制备出满足标准要求的无机保温砂浆[2]。以上研究为无机骨料的改善提供了新的思考方向,但在节能方面还有待进一步提升。因此,本文尝试以廉价膨胀珍珠岩为载体,以SiO2气凝胶为填充体制备一种低成本,高强度的新型复合保温材料。……
