|Table of Contents|

Predicting Method of Concrete Service Life Based on Damage Development Equation(PDF)

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

Issue:
2012年01期
Page:
1-7
Research Field:
Publishing date:

Info

Title:
Predicting Method of Concrete Service Life Based on Damage Development Equation
Author(s):
YU Hong-fa1;  SUN Wei2;  MA Hai-yan1;  ZHANG Yun-sheng2;  MIAO Chang-wen3;  JIN Zu-quan4;  LIU Jian-zhong3
1. Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China; 2. School of Materials Science and Engineering, Southeast University, Nanjing 210096, Jiangsu, China; 3. Jiangsu Research Institute o
Keywords:
high strength concrete;  high performance concrete;  freeing-thawing;  attack;  service life;  prediction
PACS:
TU528
DOI:
-
Abstract:
Based on the damage development equation of concrete subjected to freezing-thawing cycles or chemical attacks, a systematic theory and the basic operation for the prediction on service life of concrete structure were presented. Validity of the damage development equation of concrete was established by the vast data obtained through single factor. Service life prediction of some national key projections, such as the potassic manure plant in salt lake of Qinghai and Beijing Cloverleaf Bridge, were studied by specially designed durability experiments, which included single factor(salt lake bittern attack), double factor(wet-dry cycles compound with salt lake bittern attack), 3.5% mass concentration NaCl solution salt-frost experiments. Results show that either ordinary Portland cement concrete or high strength concrete is not applicable to the potassic manure plant in salt lake of Qinghai. Service life of Beijing Cloverleaf Bridge can also meet the requirements of 50 years since C60 air-entrained high performance concrete subjected to salt-frost action are adopted.

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Last Update: 2012-03-20