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Experiment and Mechanism Modeling Analysis on Creep of Recycled Aggregate Concrete(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2012年04期
Page:
18-24
Research Field:
Publishing date:

Info

Title:
Experiment and Mechanism Modeling Analysis on Creep of Recycled Aggregate Concrete
Author(s):
XIAO Jian-zhuang;  FAN Yu-hui
Department of Building Engineering, Tongji University, Shanghai 200092, China
Keywords:
recycled coarse aggregate;  recycled aggregate concrete;  creep;  modeling analysis;  compressive strength;  elastic modulus
PACS:
TU528
DOI:
-
Abstract:
The experiment on creep and mechanical properties of recycled aggregate concrete(RAC)was conducted by varying the recycled coarse aggregate(RCA)replacement percentage. Based on the experiment study, a finite element model was established to analyze the creep mechanism by modeling the recycled concrete as a plane model with one aggregate. The creep of modeled RAC under uniaxial compression was simulated by ANSYS software. The study results show that the 28 d cube compressive strength and elastic moduli of RAC are reduced whereas the shrinkage and creep of RAC increase with the increase of RCA replacement percentage. The simulation results reveal that the stress of new mortar and old mortar will transfer to the coarse aggregate due to the creep of mortar. The creep of modeled RAC by ANSYS software is consistent well with the experiment result.

References:

[1] 惠荣炎,黄国兴,易冰若.混凝土的徐变[M].北京:中国铁道出版社,1988.HUI Rong-yan,HUANG Guo-xing,YI Bing-ruo.Creep of Concrete[M].Beijing:China Railway Press,1988.
[2]TROXELL G E,RAPHAEL J M,DAVIS R E.Long-time Creep and Shrinkage Tests of Plain and Reinforced Concrete[C]//ASTM.Proceedings of ASTM International 58.New York:ASTM,1958:1101-1120.
[3]KORDINA K.Experiments on the Influence of the Mineralogical Character of Aggregates on the Creep of Concrete[J].RILEM Bulletin,1960(6):7-22.
[4]SHIDELER J J.Lightweight-aggregate Concrete for Structural Use[J].ACI Journal,1957,54(10):299-328.
[5]NEVILLE A M,DILGER W H,BROOKS J J.Creep of Plain and Structural Concrete[M].New York:Construction Press,1983.
[6]肖建庄,雷 斌.再生混凝土耐久性能研究[J].混凝土,2008(5):83-89.XIAO Jian-zhuang,LEI Bin.Investigation on the Durability of Recycled Concrete[J].Concrete,2008(5):83-89.
[7]DOMINGO-CABO A,LAZARO C,LOPEZ-GAYARRE F,et al.Creep and Shrinkage of Recycled Aggregate Concrete[J].Construction and Building Materials,2009,23(7):2545-2553.
[8]COUNTO U J.The Effect of the Elastic Modulus of the Aggregate on the Elastic Modulus,Creep and Creep Recovery of Concrete[J].Magazine of Concrete Research,1964,48(16):129-138.
[9]GRANGER L P,BAZANT Z P.Effect of Composition on Basic Creep of Concrete and Cement Paste[J].Journal of Engineering Mechanics,1995,121(11):1261-1270.

Memo

Memo:
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Last Update: 2012-12-20