Cracking, Ductility and Durability Characteristics of HPFRCC with Various Mixture Proportions and Fibers

Title: Cracking, Ductility and Durability Characteristics of HPFRCC with Various Mixture Proportions and Fibers
Author(s): Byung Hwan Oh, Kyung Joon Shin
Paper category : conference
Book title: International RILEM Workshop on High Performance Fiber Reinforced Cementitious Composites in Structural Applications
Editor(s): G. Fischer and V. C. Li
Print-ISBN: 2-912143-93-4
e-ISBN: 2912143942
Publisher: RILEM Publications SARL
Publication year: 2006
Pages: 213 - 222
Total Pages: 10
Nb references: 10
Language: English

Abstract: The cracking is one of the most important factors in the serviceability as well as durability performance of concrete structures. Recently, it was recognized that the high performance fiber-reinforced cementitious composite(HPFRCC) provides a possible solution to this inherent problem of cracking by smearing one or several dominant cracks into many distributed microcracks. The purpose of the present study is to explore the cracking and ductility characteristics of HPFRCC with various mixture proportions. The PVA and steel microfibers were used to identity the mechanical and cracking resistance of fiber reinforced mortars. Major test variables include the volume fraction and types of microfibers, silica sand- cement ratios, and the hybrid combination of microfibers. The load-deflection and cracking patterns were measured. In order to explore the possible application of natural ordinary sand in HPFRCC, various mixtures with partial ordinary fine aggregates were attempted and the results are discussed. The chloride permeability of various mixtures after subjected to different load levels was measured to identity the effect of reduced cracking among the mixtures. It is confirmed that the chloride permeability of HPFRCC mixtures is greatly reduced even after subjected to high load level when compared with plain mixtures without microfibers.

Online publication: 2005-05-15
Classification: Durability
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143942.023