The development of the early-age elastic modulus in cement-materials with different water coefficient

Author(s): Romana Halamová, Dalibor Kocáb, Barbara Kucharczyková, Petr Daněk
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: 345-350
Total Pages: 6
Language : English

Abstract: The effect of the composition of cementitious materials on the resulting value of the modulus of elasticity is a matter of common knowledge. However, the issue of what factors affect it during early age is still not well understood. The paper deals with the development of the modulus of elasticity in cement composites at an early age. The measurements were performed on cement pastes with varying water-cement ratio. The influence of plasticizer content was also investigated. Prism-shaped specimens with the dimensions of 40×40×160 mm and Vicat ring-shaped specimens were manufactured for the purposes of the experiment. The modulus of elasticity was determined based on a continuous measurement of the ultrasonic transit time during the first 24 hours of ageing. The measurement was started immediately after filling the measurement cell with the fresh material and took 24 hours. The internal temperature of the specimens was measured simultaneously, which provided information about the hydration process of the material. All the prismatic test specimens were removed from moulds at an age of 24 hours and tested for the dynamic modulus of elasticity by the ultrasonic pulse velocity test at the age of 24, 48 and 72 hours. The measurement of the dynamic modulus of elasticity was supplemented with a static test performed on the prismatic test specimens at the age of 24 and 72 hours.

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