Time dependent of young's modulus of concrete in very early age

Author(s): Tatsuya Usui, Takeda Hitoshi, Hiroshi Murata, Takuya Tani
Paper category: Proceedings
Book title: SynerCrete’18: Interdisciplinary Approaches for Cement-based Materials and Structural Concrete: Synergizing Expertise and Bridging Scales of Space and Time Vol. 1 & 2
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 357-362
Total Pages: 6
Language : English

Abstract: In the thermal stress analysis, the concrete stress is calculated from the early age. Therefore, it is considered that the influence on the concrete stress is great if the compressive strength and the Young's modulus in early age changes. However, these experimental data prior to 1 day of age have rarely been reported, because an appropriate measurement method has not been established. In this study, the Young's modulus of concrete was measured from very early age to 28 days material age based on JISA1149. The measurement was carried out with the ordinary cement concrete and the blast furnace cement concrete, and concrete temperatures were 20°C and 40°C to study the influence of cement types and concrete temperatures. As a result, it has been confirmed that the Young's modulus at 1.0N/mm2 or less was smaller than the regression formula of JCI guidelines by 1/10-1/100 and clearly different from the regression equation of JCI guideline.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00