侵蚀溶液中道路纤维混凝土的抗冻性能试验研究  

Experimental research on anti-freeze performance of road fiber concrete in erosion solution

作　　者：高新文[1] 张艳聪[2] 高玲玲[3] 

机构地区：[1]长沙理工大学,湖南长沙410114 [2]山西省交通科学研究院黄土地区公路建设与养护技术交通行业重点实验室,山西太原030006 [3]山西水利职业技术学院,山西运城044004

出　　处：《混凝土》2015年第4期18-21,25,共5页Concrete

基　　金：国家自然科学基金资助项目(51308329);山西省自然科学基金项目(2013011027-1);山西省交通厅科技项目(2013-1-10)

摘　　要：针对道路纤维混凝土在侵蚀溶液中的抗冻问题,成型0.44、0.42和0.40三种水灰比的小梁试件,并采用混凝土防护剂对部分试件做表面处理,放入蒸馏水、10%Na_2SO_4溶液和10%Na_2SO_4+5%NaCl溶液中做冻融循环试验,并测定其质量、相对动弹模量和抗弯拉强度损失。结果表明:混凝土的质量损失率随水灰比的升高而降低,而动弹模量和弯拉强度损失率随水灰比的升高而增加,Na_2SO_4和NaCl溶液加剧了这种趋势;表面防护剂对此三个抗冻指标均有改善作用。此外,水灰比和侵蚀溶液的影响是相互促进的。To researchthe anti-freezeperformance of road fiber concrete in erosion solution,trabecular specimensthat contained three kinds of water-cement ratio（ 0.44,0.42 and 0.40） was formed. Half of it were treated with protective agent and then placed in distilled water,10%Na2SO4solution and 10%Na2SO4＋ 5%Na Cl solution. The mass,relative dynamic elastic modulus and flexural strength of it were determined by freeze-thawcycle test. The results showthat the mass loss rate of concrete decrease with water-cement ratioincrease,while the elastic modulus and flexural strength loss rate increas with it,and Na2SO4 and Na Cl solution exacerbated this trend. The surface protective agent had improvement for the three indicatorsof anti-freeze. In addition,the effect of water-cement ratio and erosion solutions was mutually reinforcing.

关 键 词：纤维混凝土 冻融循环 侵蚀溶液 防护剂 

分 类 号：TU528.01[建筑科学—建筑技术科学]