相变控温水泥混凝土路面板设计及模型试验  

Design and Model Test of Cement Concrete Pavement Slab Based on Phase Change and Temperature Control

作　　者：高英力[1] 胡柏学[2] 贺敬[1] 杨文剑[1] 

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410004 [2]湖南省交通科学研究院,湖南长沙410015

出　　处：《中国公路学报》2011年第2期12-16,69,共6页China Journal of Highway and Transport

基　　金：湖南省自然科学基金项目(09JJ4023);中国博士后科学基金项目(20090450986);湖南省交通厅科技项目(200816)

摘　　要：引入相变储能材料及梯度功能材料设计方法,对传统水泥混凝土路面板结构进行防冻、耐磨功能设计,开展路面板模型试验研究。采取步冷试验方法,将优选出的复合相变储能材料封装入高强度无缝钢管中,制成500 mm×400 mm×80 mm的水泥混凝土路面板模型,进行模型的防冻性能和耐磨性能试验。结果表明:优选的相变材料体系相变温度点可控制在5℃左右,并产生液-固相变过程,放出热量,起到了较好的融冰效果,延缓或控制了路面板模型表面的低温冰冻现象;表面层材料耐磨性优良,28 d磨耗率仅为标准限值的51.9%;相变功能层中钢管的加筋作用可防止主体层和表面层材料之间体积变形的非一致性,强化了界面的稳定性。Based on the phase change energy storage material and functionally-graded material design method,the conventional structure of cement concrete pavement slab was designed for enhancing the function of anti-freezing and wear-resistance,and the model test of pavement slab was carried out.The step cooling test method was adopted to select the composite phase change material,and then it was placed in the high-strength seamless steel pipe.The size of the formed cement concrete pavement slab model was 500 mm×400 mm×80 mm.Anti-freezing and wear-resistance property test of the model was carried out.Results indicate that phase change temperature point of the selected phase change material is about 5 ℃,and at the point,the liquid-solid phase transition happens to reject heat which can play better ice-melting effect and delay or control the low-temperature freezing phenomena of the pavement slab model surface.The wear-resistance of the pavement slab surface material is excellent and its 28-day wear rate is only 51.9% of the standard limited value.The reinforced role of steel pipe in the phase change function layer can prevent the problem of inconsistent volume deformation between the main structure layer and surface layer and also can enhance interface stability.

关 键 词：道路工程 水泥混凝土路面板 模型试验 相变 

分 类 号：U416.216[交通运输工程—道路与铁道工程]