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

2018 5th International Conference on Advanced Composite Materials and Manufacturing Engineering

He, Xixi^1 ; Kong, Lingzhao^1 ; Li, Mu^1

School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing

100044, China^1

关键词: Axial compressive load;    Axial compressive strength;    Compressive performance;    Curing temperature;    Deformation modulus;    Fly ash concretes;    Fly ash content;    Low-temperature curing;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/394/3/032041/pdf
DOI  :  10.1088/1757-899X/394/3/032041

来源: IOP

【 摘 要 】

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.