钢纤维石墨混凝土配合比研究  

Study on Mixture Ratio of Steel Fiber Graphite Concrete

作　　者：常虹[1] 陈阿彬 Chang Hong;Chen Abin(Jilin Jianzhu University,Changchun 130118,China)

机构地区：[1]吉林建筑大学,吉林长春130118

出　　处：《廊坊师范学院学报（自然科学版）》2021年第2期83-86,91,共5页Journal of Langfang Normal University(Natural Science Edition)

基　　金：吉林省科技发展计划项目“循环温度场作用下黏土地基中能量桩热-力学特性试验研究”(20190303022SF)。

摘　　要：能量桩技术是将传统的地源热泵技术与建筑桩基础结合在一起,充分利用浅层地热能进行热量转换,使建筑桩基在满足承载性能的前提下兼起地源热泵换热器的作用。能量桩技术对桩体力学性能和储热性能具有较高的要求,针对能量桩体研发钢纤维石墨混凝土,在桩身混凝土中掺入石墨用于增强桩的导热性能,掺入钢纤维以提高桩身承载力。通过对试块进行抗压、抗折和导热系数的测试试验,得出最优配比:加入4%石墨和0.6%钢纤维,混凝土的导热系数提高30.1%,抗压强度、抗折强度分别提高6.9%和11.5%。Energy pile technology combines traditional ground source heat pump technology with building pile foundation,makes full use of shallow geothermal energy for heat conversion, and makes building pile foundation play the role of ground source heat pump heat exchanger underthe premise of satisfying bearing capacity.The energy pile technology has high requirements on the physical strength and heat storage performance of the pile.In this paper,steel fiber graphite concrete was developed for the energy pile.Graphite was added into the concrete to enhance the thermal conductivity of the pile,and steel fiber was added to improve the bearing capacity of the pile.By testing the compressive,flexural and thermal conductivity of the test block, the optimal ratio was obtained: adding 4% graphite and 0.6% steel fiber,the thermal conductivity of concrete increased by 30.1%,and the compressive strength and flexural strength increased by 6.9% and 11.5%,respectively.

关 键 词：能量桩 石墨 钢纤维 导热性 强度 

分 类 号：TU528.572[建筑科学—建筑技术科学]