Frost Resistance Of High Performance Concrete
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Frost Resistance Of High Performance Concrete
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Author : Kevin Joseph Folliard
language : en
Publisher:
Release Date : 1995
Frost Resistance Of High Performance Concrete written by Kevin Joseph Folliard and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Concrete categories.
Frost Resistance Of High Performance Concrete Some Theoretical Considerations
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Author : Göran Fagerlund
language : en
Publisher:
Release Date : 1993
Frost Resistance Of High Performance Concrete Some Theoretical Considerations written by Göran Fagerlund and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.
Hetek
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Author :
language : en
Publisher:
Release Date : 1994
Hetek written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
Hetek
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Author : Anders Henrichsen
language : en
Publisher:
Release Date : 1997
Hetek written by Anders Henrichsen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Hetek
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Author : Peter Laugesen
language : en
Publisher:
Release Date : 1997
Hetek written by Peter Laugesen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Hetek
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Author : Danish Road Directorate. HETEK.
language : en
Publisher:
Release Date : 1997
Hetek written by Danish Road Directorate. HETEK. and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Hetek
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Author : Peter Laugesen
language : en
Publisher:
Release Date : 1996
Hetek written by Peter Laugesen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with categories.
Frost Resistance Of Concrete Cladded With Locally Produced Ultra High Performance Concrete Cured At Elevated Temperatures
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Author : Ahmed Jasem Al-Basha
language : en
Publisher:
Release Date : 2017
Frost Resistance Of Concrete Cladded With Locally Produced Ultra High Performance Concrete Cured At Elevated Temperatures written by Ahmed Jasem Al-Basha and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
Ultra-high performance concrete (UHPC) is concrete that exhibits compressive strength in excess of 150 MPa. In addition to its high compressive strength, UHPC displays other characteristics such as low porosity, high density, and excellent durability and resistance to chemical and physical attack. These properties have made UHPC a progressively more popular material in a variety of structural applications and an increasingly common topic of research. The present work built upon previous research and investigated the use of different materials in UHPC mixture proportions and elevated temperature curing regimens (greater than 95°C). The purpose of this work was to maintain economical mixture proportions for locally produced UHPC while achieving greater mechanical performance and durability properties. The mixture proportions and curing regimens developed were then used to produce high quality, modular UHPC elements to be used as cladding for normal strength concrete (NSC) to improve frost resistance. Five elevated temperature curing regimens were developed and several material substitutions were investigated to determine optimal curing temperature and mixture proportions to improve compressive and flexural strengths. A curing regimen consisting of two days wet curing at 95°C followed by four days dry curing at 200°C was adopted as the main regimen and a finer stucco sand was used to replace the coarser sand that was initially used. The new curing regiment and UHPC mixture achieved compressive and flexural strengths 36.6% and 29.7% greater, respectively, than UHPC produced with the original mixture and curing regimen. Freezing and thawing testing (ASTM C 666 procedure A) was performed on UHPC and NSC prisms as well as NSC prismatic cores coated with mortar and NSC prismatic cores cladded with modular UHPC elements. Measurements of mass and transverse frequency were performed in accordance with ASTM C 215. Results showed that initial dynamic elastic modulus and durability factor (DF) for the new UHPC were only 7.1% and 0.3% lower than comparable values from the original UHPC mixture. Additionally, the NSC cores with mortar and cladding showed improvements in average number of freeze-thaw cycles sustained and DF. The coated cores had an 80.2% increase in number of freezer-thaw cycles sustained and 264.7% improvement in DF compared to plain NSC prisms, while cladded cores lasted 127.5% longer and had DF values that improved by 176.5% compared to plain NSC prisms. The DF of cladded NSC cores was lower than that of the coated cores due to loss of cladding as specimens deteriorated.
Freezing And Thawing Resistance Of High Strength Concrete
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Author : Robert E. Philleo
language : en
Publisher:
Release Date : 1986
Freezing And Thawing Resistance Of High Strength Concrete written by Robert E. Philleo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Technology & Engineering categories.
Recent developments have made a new generation of high-strength concrete a viable material for routine construction. The two principal developments are high-range water-reducing admixtures, which permit the placement of concrete of very low water-cement ratio, and silica fume, a pozzolan of extremely high fineness. The advent of this high- strength concrete has put requirements for strength and durability in conflict. Because entrained air reduces the strength of concrete, builders seek to eliminate or limit the use of entrained air. There are those who argue that high-strength concrete is of such a quality that entrained air is unnecessary. Much of the high-strength concrete currently being used is in buildings, where the question of durability is minor. The question, however, cannot be avoided in exposed highway structures. Service records of non-air-entrained high-strength concrete exposed to freezing are not conclusive. Hence, this report synthesizes the available knowledge on the subject. Its aim is to provide guidance to those who wish to use high-strength concrete in typical highway applications and to indicate where further information is needed.
Frost Resistance Of Concrete
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Author : R Auberg
language : en
Publisher: CRC Press
Release Date : 2004-03-01
Frost Resistance Of Concrete written by R Auberg and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-03-01 with Architecture categories.
This book forms the proceedings of the international workshop to be held in Essen, Germany. This workshop summarises the conclusion of the technical committee's investigations into the resistance of concrete to freeze-thaw attack, specific in this to resistance with or without de-icing chemicals. It presents the RILEM recommendations on testing the freeze-thaw and de-icing salt resistance of concrete.