期刊名称：Journal of Asian Architecture and Building Engineering
印刷版ISSN：1346-7581
电子版ISSN：1347-2852
出版年度：2015
卷号：14
期号：3
页码：657-662
DOI：10.3130/jaabe.14.657
语种：English
出版社：日本建築学会、大韓建築学会、中国建築学会
摘要：Thermal cracking of slender mass concrete in attached walls, retaining walls and bridge towers, is controlled by mainly using low heat cement and the control joint. However, it is impossible to control thermal cracks perfectly because the external restraint is largely in these mass concrete members. In this study, to control the thermal cracking of slender massive concrete structures, a new pipe cooling method, which is the vertical pipe cooling method, was developed and a mock-up of a wall-type mass concrete specimen was tested to investigate the validity of this method. Each pipe is connected to the header pipe, and a drainage control cap is installed at the upper end of each pipe. As a result, the hydration heat of the pipe cooling specimen was about 8–14°C lower than that of the non-pipe cooling specimen and the tensile stress generated was smaller in the pipe cooling specimen than in the non-pipe cooling specimen. In the specimen without pipe cooling, a penetrating crack with a maximum width of 0.40 mm and length of 1250 mm occurred in the middle of the specimen.
关键词：pipe cooling method;mass concrete;header pipe;drainage control cap
