[1]尚壮壮,刘元珍,高宇璇,等.再生粗骨料取代率对再生保温混凝土360d龄期内强度的影响[J].西安建筑科技大学学报(自然科学版),2021,53(02):217-222.[doi:10.15986/j.1006-7930.2021.02.010]
　SHANG Zhuangzhuang,LIU Yuanzhen,GAO Yuxuan,et al.Study on the effect of recycled coarse aggregate replacement rate on strength of recycled aggregate thermal insulation concrete within 360 days[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2021,53(02):217-222.[doi:10.15986/j.1006-7930.2021.02.010]
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再生粗骨料取代率对再生保温混凝土360d龄期内强度的影响()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
53
期数:
2021年02期
页码:
217-222
栏目:
出版日期:
2021-04-28

文章信息/Info

Title:
Study on the effect of recycled coarse aggregate replacement rate on strength of recycled aggregate thermal insulation concrete within 360 days
文章编号:
1006-7930(2021)02-0217-06
作者:
尚壮壮; 刘元珍; 高宇璇; 王朝旭
(太原理工大学 土木工程学院,山西 太原 030024)
Author(s):
SHANG Zhuangzhuang;  LIU Yuanzhen;  GAO Yuxuan;  WANG Zhaoxu
(College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China)
关键词:
再生保温混凝土;  再生粗骨料取代率;  360d龄期内抗压强度;  360d龄期内强度预测模型
Keywords:
recycled aggregate thermal insulation concrete; recycled coarse aggregate replacement rate; compressive strength within 360 days; strength prediction model during the 360 days of age
分类号:
TU528.572
DOI:
10.15986/j.1006-7930.2021.02.010
文献标志码:
A
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.
Abstract:
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.

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(编辑 桂智刚)

备注/Memo

备注/Memo:
收稿日期:2020-09-17 修改稿日期:2021-03-15
基金项目: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)
第一作者:尚壮壮(1996-),男,硕士生,研究方向为结构工程; E-mail:897054438@qq.com
通信作者:刘元珍(1974-),女,教授,博士生导师,研究方向为结构工程; E-mail:liuyuanzhen@tyut.edu.cn
更新日期/Last Update: 2021-04-28