Page 49 - 健康與建築第三卷二期

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混凝土於不同環境溫度下力學性質之探討 40 究
論

文
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The Study on the Mechanical Properties of Concrete Under Different

Storing Temperatures

Weng, Tsai-Lung1* Lin, Guan-Hung2 Weng, Shih-Han3 Weng, Wei-Lun4

1Associate Professor, Tatung University
2Master, Institute of Materials Engineering, National Taiwan Ocean University

3Assistant Professor, Department of Architecture, China University of Science and Technology

4Teacher, Department of Civil Engineering, Jui-Fang Industrial High School

Abstract

Background: Fossil-fuel and nuclear power plants are constructed using heavyweight concrete. However,

their mechanical properties may alter after prolonged periods in high-temperature environments, which is a
safety issue. Thus, the design and materials in such structures must be chosen more carefully than with gen-

eral public buildings.

Purposes: The objective of this study was to compare the mechanical properties of heavyweight and normal
concrete after prolonged periods in a high-temperature environment (approximately 95°C) and a normal-

temperature environment (23°C).

Methods: Concrete specimens that were wet-cured for 28 days were placed in environments at room tem-

perature and at 95°C for 91 days before mechanical tests for compressive strength, splitting tensile strength,

and elasticity were administered. The properties of the heavyweight concrete (approximately 3,300 kg/m3)
and normal concrete (approximately 2,350 kg/m3) specimens were compared.

Results: The compressive strength, splitting tensile strength, and moduli of elasticity of the heavyweight
concrete (H group) and normal concrete (C group) specimens stored at 95°C were 99~111%, 70~98%, and

83~107% that of the specimens at room temperature (23°C).

Conclusions/Implications for Practice: The results of this study indicate that the mechanical properties

of the concrete and room temperature at 95°C show little difference. The results provide reference for archi-
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Keywords: concrete, mechanical properties.
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Accepted for publication: Janurary 15 , 2016
Arc
Corresponding author : Weng, Tsai-Lung
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ect
Address : No.40, Sec. 3,Zhongshan N. Rd., Taipei City 104, Taiwan(R.O.C) ure

Tel : 0928-511625
V
E-mail : wengabc@ttu.edu.tw
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