Study on the Mechanism and Estimation Method of Thermal Cracking of Steel-pipe Concrete Composite Pier Structure

Ohtomo, Takeshi; Abe, Kouichi; Satō, Kazunori; Sasaki, Ryuzo

doi:10.3151/crt1990.13.3_91

Cited by 3 publications

(1 citation statement)

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“…Therefore, we decided to correct the data to take the heat loss into consideration. Previous studies (Ohtomo et al 2002;Miyazawa et al 2004) reported a method for predicting the temperature rise under a complete adiabatic state based on the result of a semi-adiabatic test. In this method, a coefficient of heat loss must be calculated by comparing the results between a complete adiabatic test and a semi-adiabatic test.…”

Section: Adiabaticity Of Equipmentmentioning

confidence: 99%

Development of a New Adiabatic Calorimeter for Quality Control of Cement

Maruya

Sakai

Hagiwara

et al. 2009

ACT

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As the use of industrial waste as a raw material for the production of cement is expanded, it will become increasingly important to control the adiabatic temperature rise of cement. The evaluation of adiabatic temperature rise in concrete is not adequate for daily quality control because it requires considerable labor. In order to establish a convenient method for evaluating adiabatic temperature rise using only about 30ml of mortar sample, we produced an experimental adiabatic calorimeter. This paper investigates the accuracy and the applicability of this equipment. In addition, the adiabatic temperature rises of cement samples with different C 3 A content were investigated for future utilization of industrial waste. Values of adiabatic temperature rise measured using this equipment were found to correspond to those obtained using existing equipment, with correction for the heat capacity of the sample container. Clear differences in adiabatic temperature rise were observed among mortar samples with different blending conditions. Changes in adiabatic temperature rise were negligible even when the aluminate phase content of the studied cement was increased from 9 mass% to 12 mass%. These results suggest that quality control of cement and preparatory experiments could be practiced reasonably by using this adiabatic calorimeter.

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Section: Adiabaticity Of Equipmentmentioning

confidence: 99%

Development of a New Adiabatic Calorimeter for Quality Control of Cement

Maruya

Sakai

Hagiwara

et al. 2009

ACT

View full text Add to dashboard Cite

show abstract

Development and Application of Adiabatic Calorimeter Used for Small Mortar Sample

Maruya¹,

Sakai²,

Hagiwara³

et al. 2007

J. Soc. Mat. Sci., Japan

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The evaluating test for adiabatic temperature rise in concrete is not adequate for daily quality control because it requires considerable labor. In order to establish a convenient method for the evaluation of adiabatic temperature rise using about 30mL of mortar sample only, we produced an adiabatic calorimeter experimentally. In this paper, the accuracy and the applicability of this equipment is investigated. Values of adiabatic temperature rise measured using this equipment were found to correspond to those obtained using existing equipment, by the correction of heat capacity of a sample container. Clear differences were observed between mortar samples with different blending conditions. These results suggest that the quality control of cement and preparatory experiments could be practiced reasonably by using this adiabatic calorimeter.

show abstract