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原文传递 ULTRA HIGH PERFORMANCE FIBRE REINFORCED CONCRETE TECHNOLOGY

题名：	ULTRA HIGH PERFORMANCE FIBRE REINFORCED CONCRETE TECHNOLOGY
正文语种：	eng
作者：	Sanjay Kumar Nirmal
作者单位：	IRC & Additional Director General MoRT&H
摘要：	Ultra high performance fibre reinforced concrete technology is an advanced construction material. "UHPFRC" stands for Ultra High Performance Fibre Reinforced Cement based Composite material produced from cement, additions (powders), hard fine particles, water, admixtures and high amount of relatively short steel fibres. The incorporation of fibres significantly improves the tensile capacity, leading to a high deformability (above 1%) with a pseudo-plastic phase (multi cracking) and an increase in the tensile capacity before crack localization and strength depletion. In particular, UHPFRC has very high strength properties resulting in a significant decrease in the structural weight, i.e., the weight of UHPFRC structures is about 1/3 to 1/2 of the weight of general reinforced concrete structures at identical external loads. These characteristics result in a UHPFRC with better performance, higher durability and increased bearing capacity and toughness compared to normal and high strength concretes. The main advantage of UHPFRC in relation to conventional and High-Performance Concrete (HPC) is its high propensity to avoid cracks due to the high tensile strength, limited shrinkage due to the reduced w/c ratio possible due to efficient R&D advances in superplasticizers and mineral admixture and significant viscous response, obtained by the very dense matrix which contributes to relax the eigen stresses.
出版年：	2022
期刊名称：	Indian Highways
卷：	50
期：	7
页码：	4-5