Size and Temperature Effect of Compressive Strength and Deformation Modulus of Fly Ash Concrete Prism

• Published in: IOP conference series. Materials Science and Engineering Vol. 394; no. 3; pp. 32041 - 32051
• Main Authors: He, Xixi, Kong, Lingzhao, Li, Mu
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.07.2018
• Subjects: Axial compression loads; Compressive strength; Concrete construction; Curing; Deformation effects; Fly ash; Low temperature; Modulus of deformation; Modulus of elasticity; Prisms; Temperature effects
• ISSN: 1757-8981; 1757-899X; 1757-899X
• DOI: 10.1088/1757-899X/394/3/032041

In this paper, the prism specimens of fly ash concrete were tested under the axial compressive load, and the prism specimens were cast with different curing temperature in winter. The aim of this project is to find how section size, curing temperature and fly ash content influence the compressive performance of the long curing age prism specimens. The side length of prisms cross section have a total of 6 dimensions from 100mm to 500mm. Concrete mixtures were prepared by substituting 0, 25% and 50% fly ash respectively. The average curing age of specimens is 570 days. The results show that when the size of the specimens increases, the axial compressive strength of the prism specimen, modulus of elasticity, and the peak value of secant modulus increase as well. Replacing part of cement with fly ash and increasing specimen size are beneficial to the strength and elastic modulus growth of concrete under construction and low temperature curing conditions in winter.