[1]黄嘉钰,刘元珍,高宇璇,等.再生粗骨料取代率对再生保温混凝土徐变影响的研究[J].郑州大学学报(工学版),2021,42(05):68-73.[doi:10.13705/j.issn.1671-6833.2021.05.001]
　Huang Jiayu,Liu Yuanzhen,Gao Yuxuan,et al.Study on Influence of Recycled Coarse Aggregate Replacement Rate on Creep of Recycled Thermal Insulation Concrete[J].Journal of Zhengzhou University (Engineering Science),2021,42(05):68-73.[doi:10.13705/j.issn.1671-6833.2021.05.001]
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再生粗骨料取代率对再生保温混凝土徐变影响的研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
42卷
期数:
2021年05期
页码:
68-73
栏目:
出版日期:
2021-09-10

文章信息/Info

Title:
Study on Influence of Recycled Coarse Aggregate Replacement Rate on Creep of Recycled Thermal Insulation Concrete
作者:
黄嘉钰; 刘元珍; 高宇璇; 王朝旭
太原理工大学土木工程学院;
Author(s):
Huang Jiayu; Liu Yuanzhen; Gao Yuxuan; Chao Chaoxu;
School of Civil Engineering, Taiyuan University of Technology;
关键词:
Keywords:
recycled coarse aggregate replacement rate;  elastic modulus;  creep;  creep coefficient;  modified model
DOI:
10.13705/j.issn.1671-6833.2021.05.001
文献标志码:
A
摘要:
本文通过恒温恒湿条件下再生保温混凝土的徐变试验，研究了再生粗骨料取代率对再生保温混凝土的弹性模量、徐变值以及徐变系数的影响，并提出了一种基于ACI-FIP(1990)模型的新修正模型，该模型可用于预测不同再生粗骨料取代率下再生保温混凝土的徐变系数。试验表明：随着再生粗骨料取代率的增加，再生保温混凝土的弹性模量降低，徐变值和徐变系数显著增加；修正后的徐变模型预测结果与试验结果的对比分析表明，新修正模型可以较好地预测不同再生粗骨料取代率下混凝土的徐变系数变化情况。
Abstract:
Based on the creep test of recycled thermal insulation concrete under constant temperature and humidity, this research studies the different development of creep value, creep coefficient and elastic modulus of recycled thermal insulation concrete when the replacement rate of recycled coarse aggregate changes. Based on the ACI-FIP (1990) model, a new modified model is proposed to predict accurately the development state of creep coefficient of recycled thermal insulation concrete when the replacement rate of recycled coarse aggregate is different. Experiments showed that with the increase of the replacement rate of recycled coarse aggregate, the elastic modulus of recycled thermal insulation concrete decreased, and the creep value and creep coefficient increased significantly. Compared with thermal insulation concrete, the elastic modulus of recycled thermal insulation concrete with recycled coarse aggregate replacement ratios of 50% and 100% decreased by 10% and 12%, respectively. At 180 days, the creep of recycled thermal insulation concrete with recycled coarse aggregate replacement ratios of 50% and 100% increased by 6% and 17%, and the creep coefficient increased by 12% and 31%, respectively. Comparing the predicted results of the modified creep model with the test results, through linear regression analysis, it is found that the linear regression coefficients (R2) of recycled thermal insulation concrete models are all between 0.91 and 0.93, indicating the model has a good degree of fit and it can better predict the change of concrete creep coefficient with variation of recycled coarse aggregate replacement ratios.

参考文献/References:

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[2] 肖建庄,范玉辉.再生混凝土徐变试验及机理的模型化分析[J].建筑科学与工程学报,2012,29(4):18-24.
[3] 罗素蓉,黄海生,郑建岚.再生骨料混凝土徐变性能试验研究[J].建筑结构学报,2016,37(增刊2):115-120.
[4] 白国良,祁豪,刘超.再生混凝土徐变试验与预测模型研究[J].建筑结构学报,2016,37(增刊2):121-126.

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更新日期/Last Update: 2021-10-11