Effect of Curing Period on Properties of Steel and Polypropylene Fibre Reinforced Ultra-High Performance Concrete

World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium - WMCAUS

土木建筑工程

Smarzewski, Piotr^1

Lublin University of Technology, 40 Nadbystrzycka, Lublin

20-618, Poland^1

关键词: Apparent density;    Curing periods;    Fibre reinforced;    Good correlations;    Polypropylene fibres;    Splitting strength;    Strength development;    Ultra high performance concretes;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/245/3/032059/pdf
DOI  :  10.1088/1757-899X/245/3/032059

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

This study has investigated the effect of curing period on the mechanical properties of straight polypropylene and hooked-end steel fibre reinforced ultra-high performance concrete (UHPC). Various physical properties are evaluated, i.e. absorbability, apparent density and open porosity. Compressive strength, tensile splitting strength, flexural strength and modulus of elasticity were determined at 28, 56 and 730 days. Comparative strength development of fibre reinforced mixes at 0.5%, 1%, 1.5% and 2% by volume fractions in relation to the mix without fibres was observed. Good correlations between the compressive strength and the modulus of elasticity are established. Steel and polypropylene fibres significantly increased the compressive strength, tensile splitting strength, flexural strength and modulus of elasticity of UHPC after two years curing period when fibre content volume was at least 1%. It seems that steel fibre reinforced UHPC has better properties than the polypropylene fibre reinforced UHPC.