相变储能混凝土的制备与性能  

Preparation and properties of phase-changing energy-storing concrete

作　　者：马芹永[1,2] 白梅[1] MA Qinyong1,2 , BAI Mei1(1. Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China; 2. Engineering Research Center of Underground Mine Construction, Ministry of Education, Anhui University of Science and Technology, Huainan 232001, Chin)

机构地区：[1]安徽理工大学土木建筑学院,淮南232001 [2]安徽理工大学矿山地下工程教育部工程研究中心,淮南232001

出　　处：《复合材料学报》2018年第3期676-683,共8页Acta Materiae Compositae Sinica

摘　　要：膨胀珍珠岩吸附硬脂酸丁酯后用石灰石粉末改性制成相变储能骨料(PCESA),用其等体积部分取代砂制备相变储能混凝土。测试相变储能混凝土的抗压强度和劈裂抗拉强度,通过SEM图像分析相变储能混凝土的微观形貌,用DSC测试PCESA的相变特征及相变储能混凝土的比热容。试验结果表明:相变储能混凝土中PCESA结构保持完整且其与水泥石的界面过渡区密实,相对提高了相变储能混凝土的强度;PCESA具有较好的热物理性能,添加在混凝土中增强了混凝土的储能能力;当PCESA的掺量为20vol%时,相变储能混凝土具有较好的力学性能和热物理性能,在建筑结构中使用既可以起到承重的作用又能实现节能的目的。Butyl stearate was impregnated into pores of expanded perlite,and limestone powder wrapped up it to prepare phase-changing energy-storing aggregates（PCESA）.Phase-changing energy-storing concrete was prepared by PCESA replacing some sand.Experiments of compressive strength and splitting tensile strength were carried out for phase-changing energy-storing concrete.The micro-morphology of phase-changing energy-storing concrete was characterized by using SEM images.Both phase transition properties of PCESA and specific heat capacity of phasechanging energy-storing concrete were characterized by DSC technique.The test results show that：The PCESA remain intact in phase-changing energy-storing concrete,and interfacial transition zone（ITZ）is typical attribute of phase-changing energy-storing concrete with good integrity between cement paste and PCESA,which leads to the increase of phase-changing energy-storing concrete strength relatively.The increase of PCESA volume fraction results in a rising of specific heat capacity of phase-changing energy-storing concrete due to the good thermo-physical performance of PCESA.When the content of PCESA is up to 20 vol%,the phase-changing energy-storing concrete has a good mechanical and thermo-physical performance,and it is equally amenable to bearing capacity and building energy conservation.

关 键 词：相变储能骨料 相变储能混凝土 微观结构 抗压强度 劈裂抗拉强度 比热容 

分 类 号：TU528[建筑科学—建筑技术科学]