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《Concrete》 2007-12
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Mechanism analysis of temperature crack appear of super mass concrete and new methods of anti-rack

JIANG Xi-ping1,2,WANG She-liang1,DUAN Shu-xin3,SUN Ye1(1.School of Civil Engineering Xi'an University of Architecture and Technology,Xi'an 710055,China; 2.Department of Civil Engineering Anhui University of Science and Technology,Huai'nan 232001,China; 3.The First Sub-Company of the 13th Construction Company China National Chemical Engineering,Cangzhou 061000,China)  
This paper introduces the concept of super mass concrete;elaborates the two main essential requirements,temperature difference and constraints,of the temperature crack of super mass concrete;points out that at the early stage of hydration reaction of super mass concrete,the temperature difference is easy to come out.Under inner constraint,surface crack comes out;During the cooling stage of super mass concrete,the shrinkage of concrete under external restraints is easier to cause the appearance of transverse cracks,which will severely affect the properties of structure and destroy the integrity and durability of structure and so on.Based on the principle of anti-rack and removal of constraints,the paper proposes two new practicable countermeasures:compound super mass lean concrete and elastic-sliding bedding cushion and also introduces the specific methods of them in the real projects.These two measures have certain guide meaning of cracking resistance problems of super mass concrete.
【Fund】: 国家自然科学基金项目(59878044);; 安徽理工大学硕士基金项目
【CateGory Index】: TU755
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【References】
Chinese Journal Full-text Database 2 Hits
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【Co-references】
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1 LIU Wen-yan~(1,2),HUANG Ding-ye~2,HUA Yi-jie~3(1.Department of Civil Engineering,Shanghai Institute of Technology,Shanghai200233,China;2.Tongji University,Shanghai200092,China;3.Construction Bureau of Pudong,Shanghai200000,China);Probe into test method of heat convection coefficient of concrete[J];Building Science Research of Sichuan;2004-04
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