Technical Development of a Long Span Mono-rail Girder applying Ultra High Strength Fiber Reinforced Concrete

Tanaka, Yasushi; Kobayashi, Takao; Ishido, Minoru; Ohkawa, Masahiro

doi:10.3151/coj1975.45.11_27

Cited by 2 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The UHPC material used in this research is a commercially available product under brand name Ductal Ò which is increasingly used in bridge engineering, as well as railway engineering [16]. The premix cement, high-range reducer, and steel fibers were provided by Lafarge North America, and the mixing was performed at the structural laboratory at the University of Central Florida.…”

Section: Methodsmentioning

confidence: 99%

Dowel action and shear strength contribution of high strength rebar embedded in ultra-high performance fiber reinforced concrete

Xia

Xiao

Mackie

et al. 2015

Engineering Structures

View full text Add to dashboard Cite

Section: Methodsmentioning

confidence: 99%

Dowel action and shear strength contribution of high strength rebar embedded in ultra-high performance fiber reinforced concrete

Xia

Xiao

Mackie

et al. 2015

Engineering Structures

View full text Add to dashboard Cite

“…Other authors and even the French Recommendations [235] [8] also resort to this method assuming different hypothesis, since direct tensile tests are more difficult to be successfully performed. In the following lines the back analysis method is explained.…”

Section: Back Analysismentioning

confidence: 99%

“…This implies that structural capacity of both elements can be added, because both reach their maximum strength associated to the similar strains, taking the full advantage of the material properties. The first initial cracking stress depends mainly on the tensile toughness of the composite (as long as the cracking appears due to the tensile strain), and the ultimate tensile strength depends on the bridging effect of the steel fibers, which is due to the fiber-matrix bond as well as the tensile strength of the fiber [235]. Several authors demonstrated that matrix strength and tensile strength are both higher with steel fibers [116] [43].…”

Section: Tensile and Flexural Behaviormentioning

confidence: 99%

See 1 more Smart Citation

Dosage optimization and bolted connections for UHPFRC ties

Camacho¹,

Efraím²

View full text Add to dashboard Cite

No part of this volume may be produced, stored in retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of the publishers. Los límites son físicos. Las limitaciones, mentales. Summary Dosage optimization and bolted connections for UHPFRC tiesConcrete technology has been in changeful evolution since the Roman Empire time. It is remarkable that the technological progress became of higher magnitude from the second part of the XX Century. Advances in the development of new cements, the appearance of the fibers as a reinforcement for structural applications, and specially the grand progress in the field of the water reducing admixtures enabled the emergence of several types of special concretes. One of the lasts is the Ultra High Performance Fiber Reinforced Concrete (UHPFRC), which incorporates advances of the Self-Compacting Concrete (SCC), Fiber-Reinforced Concrete (FRC) and Ultra High Strength Concrete (UHSC) technology. This exclusive material requires a detailed analysis of the components compatibility and a high control of the materials and processes. Mainly patented products have been used for the few structural elements carried out so far today, but the costs makes doubtful the development of many other potential applications.In accordance with the previously explained, a simplification of the UHPFRC components and processes is needed. This becomes the first main goal of this Ph.D. thesis, which emphasizes in the use of local available components and simpler mixing processes. Moreover, the singular properties of this material, between ordinary concrete and steel, allow not only the realization of slenderer structures, but also the viability of new concepts unthinkable with ordinary concrete. In this field is focused the second part of the Ph.D. thesis, which develops a bolted connection system between UHPFRC elements. This research summarizes, first of all, the subfamilies belonging to the HPC-UHPC materials. Afterwards, it is provided a detailed comparison between the dosage and properties of more than a hundred of mixtures proposed by several authors in the last ten years of technology. This becomes a useful tool to recognize correlations between dosages and properties and validate or no preconceived ideas about this material.Based on this state of art analysis was performed the later development of mixtures, on Chapter 4, which analized the effect of use of simpler components and processes on the UHPFRC. The main idea was use local components available in the Spanish market, identifying the combinations that provide the best rheological and mechanical properties. Steam curing use was avoided since a process simplification is intended. Diferent dosages were developed to be adapted to various levels of performance, and always trying to be as economical as possible. The concretes designed were selfcompacting and mainly combined two fiber types (hybrid), as the flexural performance was of greater relevanc...

show abstract

Technical Development of a Long Span Mono-rail Girder applying Ultra High Strength Fiber Reinforced Concrete

Cited by 2 publications

References 0 publications

Dowel action and shear strength contribution of high strength rebar embedded in ultra-high performance fiber reinforced concrete

Dowel action and shear strength contribution of high strength rebar embedded in ultra-high performance fiber reinforced concrete

Dosage optimization and bolted connections for UHPFRC ties

Contact Info

Product

Resources

About