|Table of Contents|

Residual Flexural Strength of Recycled ConcreteAfter Elevated-temperatures(PDF)

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

Issue:
2009年03期
Page:
32-36
Research Field:
Publishing date:
2009-09-20

Info

Title:
Residual Flexural Strength of Recycled ConcreteAfter Elevated-temperatures
Author(s):
XIAO Jian-zhuang1;  HUANG Yun-biao1; 2;  ZHENG Yong-chao3
1. Department of Building Engineering, Tongji University, Shanghai 200092, China; 2. Shanghai EuropenSunshine Plaza Investment Development Group Co. Ltd., Shanghai 201206, China; 3. ChinaBuilding Technique Group Co. Ltd., Beijing 100013, China
Keywords:
recycled concrete;  elevated-temperature;  residual flexural strength;  recycled coarse aggregate;  replacement percentage
PACS:
TU528.041
DOI:
-
Abstract:
Based on the flexural test of 150 prism specimens after elevated-temperatures ranging from 20 ℃ to 800 ℃, the fire performance of recycled aggregate concrete(RAC)with different replacement percentages of recycled coarse aggregate(RCA)(i.e. 0%, 30%, 50%, 70%, 100%)was investigated. Through contrasting and analyzing the test phenomenon as well as the data at elevated-temperatures and after elevated-temperatures, the residual flexural strength of recycled concrete was studied, meanwhile, the varying characteristics and the relationships between the residual flexural strength of recycled concrete and exposed temperatures were analyzed. Finally, the suggestion formulas of residual flexural strength of recycled concrete and exposed temperatures in terms of the testing statistics were proposed. The results show that the residual flexural strength of recycled concrete after elevated-temperatures decreases with the elevating of exposed temperatures, and the effect of the replacement percentage of RCA on the residual flexural strength of recycled concrete after elevated-temperatures is unnoticeable compared to that of the residual compressive strength.

References:

[1] 肖建庄,李佳彬,孙振平,等.再生混凝土的抗压强度研 究[J].同济大学学报:自然科学版,2004,32(12):1558-1561.XIAO Jian-zhuang,LI Jia-bin,SUN Zhen-ping,et al.Study on Compressive Strength of Recycled Aggregate Concrete[J].Journal of Tongji University:Nat-ural Science,2004,32(12):1558-1561.
[2]肖建庄,黄运标.高温后再生混凝土残余抗压强度[J].建筑材料学报,2006,9(3):255-259.XIAO Jian-zhuang,HUANG Yun-biao.Residual Compressive Strength of Recycled Concrete After High Temperature[J].Journal of Building Materials,2006,9(3):255-259.
[3]GB/T 50081-2002,普通混凝土力学性能试验方法标准[S].GB/T 50081-2002,Standard for Test Method of Mechanical Properties on Ordinary Concrete[S].
[4]MOHAMEDBHAI G T G.Effect of Exposure Time and Rates of Heating and Cooling on Residual Strength of Heated Concrete[J].Magazine of Concrete Research,1986,38(136):151-158.
[5]杨文科.试论抗压与抗折的辩证关系及综合值的概念[J].混凝土,2003(8):13-16.YANG Wen-ke.Study on Contradictory Relationship Between Compressive and Bending Strength and Conception of Synthetic Value[J].Concrete,2003(8):13-16.

Memo

Memo:
-
Last Update: 2009-09-20