摘要
本试验基于0%、50%、100%三种再生粗骨料取代率,研究了取代率对再生保温混凝土360 d龄期内强度的影响,并在现有欧洲EC2模型的基础上进行修正,提出可准确预测再生保温混凝土360 d龄期内抗压强度的模型.研究表明:360 d龄期时RATIC-100的抗压强度是RATIC-50的98%,是RATIC-0的94%,与此同时,RATIC-100的龄期系数是RATIC-50的1.01倍,是RATIC-0的1.24倍.可见再生粗骨料取代率越大,再生保温混凝土的360 d龄期内抗压强度越小,而其后期强度增长速度越快.基于修正模型所得到的再生保温混凝土强度预测曲线与实测曲线的判定系数均大于0.9,表现出较高的拟合度.因此,再生保温混凝土的360 d龄期内抗压强度可以通过本文提出的修正模型得到准确的预测.
In this paper,three kinds of recycled coarse aggregate replacement rates of 0%,50%and 100%are designed to study the effect of replacement rate on the strength of Recycled Aggregate Thermal Insulation Concrete(RATIC)within 360 days.Based on the existing European EC2 model,a model which can accurately predict the compressive strength of Recycled Aggregate Thermal Insulation Concrete(RATIC)within 360 days is proposed.The research shows that the compressive strength of RATIC-100 is 98%of RATIC-50 and 94%of RATIC-0 at the age of 360 days.At the same time,the age coefficient of RATIC-100 is 1.01 times that of RATIC-50 and 1.24 times that of RATIC-0.It could be observed that the increases of the replacement rate of recycled coarse aggregate caused the compressive strength of Recycled Aggregate decrease,but the higher the replacement rate is,the faster the strength increases in the later period.The determination coefficient of the strength prediction curve of Recycled Aggregate Thermal Insulation Concrete(RATIC)based on the modified model and the measured curve are both greater than 0.9,showing a high degree of fit.In consequence,the compressive strength of RATIC within 360 days can be accurately predicted by the modified model proposed in this paper.
作者
尚壮壮
刘元珍
高宇璇
王朝旭
SHANG Zhuangzhuang;LIU Yuanzhen;GAO Yuxuan;WANG Zhaoxu(College of Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《西安建筑科技大学学报（自然科学版）》
北大核心
2021年第2期217-222,共6页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家自然科学基金项目(51678384,51911530238)
山西省重点研发计划(201903D321043)
山西省高等学校科技成果转化培育项目(2020CG023)。
关键词
再生保温混凝土
再生粗骨料取代率
360
d龄期内抗压强度
360
d龄期内强度预测模型
recycled aggregate thermal insulation concrete
recycled coarse aggregate replacement rate
compressive strength within 360 days
strength prediction model during the 360 days of age
