摘要
为研究钢纤维煤矸石混凝土的抗冻性能,以冻融循环次数和钢纤维掺量为主要变量,通过快速冻融试验,研究不同掺量的钢纤维煤矸石混凝土的表观形貌、质量损失、相对动弹性模量和抗压强度的变化规律;并依据钢纤维煤矸石混凝土动弹性模量的变化,定义钢纤维煤矸石混凝土的损伤变量,建立冻融环境下钢纤维煤矸石混凝土的损伤模型。研究结果表明:在冻融环境作用下掺入适量的钢纤维能够降低煤矸石混凝土的质量损失和减缓相对动弹性模量的下降,提高煤矸石混凝土的抗冻性能;依据损伤变量提出的损伤模型与试验数据符合较好,可以为冻融环境下钢纤维煤矸石混凝土的耐久性研究提供理论参考。
In order to study the frost resistance of steel fiber reinforced coal gangue concrete,the freezing-thawing cycle number and the steel fiber content are taken as the main variables. Through rapid freezing-thawing test,the change of apparent morphology,mass loss,relative dynamic elastic modulus and compressive strength of the coal gangue concrete with different dosages of steel fiber was studied. According to the change of dynamic modulus of elasticity of steel fiber reinforced coal gangue concrete,the damage variable is defined firstly,and then the damage model of steel fiber reinforced gangue concrete under freezing and thawing environment is established. The results showthat in the freezing-thawing environment,adding appropriate amount of steel fiber can reduce the loss of mass and the relative dynamic modulus of elasticity,and then can improve the frost resistance of coal gangue concrete. The steel fiber reinforced coal gangue concrete damage equation has accorded well with the experimental data,which can provide theoretical reference for studying the durability of steel fiber reinforced coal gangue concrete in freezing-thawing environment.
作者
邱继生
潘杜
谷拴成
关虓
郑娟娟
张程华
QIU Jisheng;PAN Du;GU Shuancheng;GUAN Xiao;ZHENG Juanjuan;ZHANG Chenghua(School of Architecture and Civil Engineering,Xi＇an University of Science and Technology,Xi＇an 710054,China)
出处
《冰川冻土》
CSCD
北大核心
2018年第3期563-569,共7页
Journal of Glaciology and Geocryology
基金
陕西省自然科学基础研究计划面上项目(2018JM5167)
中国博士后科学基金项目(2017M613166)
陕西省自然基础研究计划青年科学基金项目(2016JQ5090)资助
关键词
钢纤维煤矸石混凝土
抗冻性能
相对动弹性模量
损伤模型
steel fiber reinforced coal gangue concrete
frost resistance
relative dynamic elastic modulus
damage evolution equation
