摘要
目的研究相变蓄热材料的添加对保温砂浆导热系数和比热的影响,以及保温砂浆抵抗温度破坏的能力.方法向保温砂浆中添加自制的相变蓄热材料,对导热系数和比热容进行测试.通过保温砂浆和泡沫混凝土冻融循环后的破坏程度,比较保温砂浆与泡沫混凝土抗冻能力.结果保温砂浆中添加了相变蓄热材料,其导热系数没有因为添加密度较大物质而变大;保温砂浆中添加质量为5%的相变蓄热材料后,比热容增大了54%;经过测试保温砂浆的吸湿量要小于泡沫混凝土的吸湿量;经过5次冻融循环试验后,保温砂浆试件的边缘棱角处基本没有变化,而泡沫混凝土试件的边缘棱角处已经出现明显的脱落,其试件形状出现变化.结论添加相变蓄热材料对保温砂浆的导热系数基本不造成影响,相变蓄热材料的添加可大幅度提高保温砂浆的蓄热能力,保温砂浆的吸湿能力不及泡沫混凝土,表明保温砂浆内部积水的机率要小于泡沫混凝土,由于保温砂浆中含有一定比例的苯粒,其抵抗冻融的能力要大于泡沫混凝土.
The paper researches the influence of thermal conductivity and specific heat of thermal insulation mortar,and the property of resistance temperature destruction while adding the phase change material.Taking the self-made phase change material as the addition into the conductivity and specific heat of thermal insulation mortar,the tests for contrasting the frost-resistance capability of thermal insulation mortar with froth concrete are carried out,by inspecting extent of the damage after freeze-thaw cycle.The specific heat capacity of thermal mortar increased by 54% while adding the quality of 5% the phase change material.The hygroscopic capacity of the thermal insulation mortar is less than that of froth concrete,after 5 times thaw-freeze cycles experiments,with the facts that the specimen edge angular department of the thermal insulation mortar is unchanged,while concrete specimen has noticeably falling off,and the specimen shape changes.The thermal conductivity of thermal insulation mortar after adding the material for energy storage barely changes,while regenerative capacity has been increased significantly.The absorption capacity of thermal insulation mortar is less than that of froth concrete.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2010年第5期930-934,共5页
Journal of Shenyang Jianzhu University：Natural Science
基金
住房和城乡建设部科技攻关项目(2007-k4-19)
关键词
相变蓄热材料
导热系数
比热
吸湿率
冻融循环
phase change material
coefficient of thermal conductivity
specific heat
hygroscopic capacity
freeze-thaw cycle.
