Lutze / Berg Handbook on fly ash in concrete

Principles of production and use
2. Auflage 2013
ISBN: 978-3-7640-0558-0
Verlag: Rainer Büchel
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, 146 Seiten

Reihe: edition beton

When used as an addition and binder component, fly ash has become an indispensable construction material for many concrete applications. The conditions produced in power stations when firing fine pulverized coal result in the formation of a reactive, flour-fine, pozzolanic mineral material from the accompanying rock in the coal. Owing to its specific characteristics it has a positive impact on the properties of fresh and hardened concrete and facilitates cost-effective production of high-grade, durable concretes. The authors of this handbook have combined the latest discoveries from the field of research with practical experience of the use and effects of fly ash in concrete. This handbook provides the necessary information and makes interesting suggestions for selective use of fly ash in concrete.

Autoren/Hrsg.

Lutze, Dietmar

Berg, Wolfgang vom

Inhaltsverzeichnis

1 Basic principles
1.1 Definition
1.2 Historical development
1.3 Raw materials, production and quality control of fly ash
1.3.1 Raw materials
1.3.2 Production
1.3.3 Monitoring and certification
1.4 Material properties of fly ash
1.4.1 Mineral and chemical composition
1.4.2 Physical parameters
1.4.3 Environmental and health compatibility

2 Effect of fly ash in concrete
2.1 Physical effect
2.2 Chemical effect
2.3 Properties of the pore structure
2.4 Properties of the contact zone between aggregate and hardened cement paste

3 Use of fly ash in concrete
3.1 General
3.2 Fly ash as a concrete addition
3.2.1 Requirements
3.2.2 Concrete conforming to DIN EN 206-1/DIN 1045-2
3.2.3 Concrete for concrete products
3.3 Production of concrete containing fly ash
3.3.1 Transporting, storing and conveying
3.3.2 Metering and mixing
3.3.3 Placing and processing
3.3.4 Curing and removal of formwork
3.4 Fly ash as a main constituent of cement

4 Properties of concrete containing fly ash
4.1 Fresh concrete
4.1.1 Water demand
4.1.2 Workability
4.1.3 Early stiffening
4.1.4 Setting
4.2 Hardened concrete
4.2.1 Evolution of heat of hydration and tendency to cracking
4.2.2 Strength
4.2.3 Deformation
4.2.4 Durability
4.2.5 Environmental and health compatibility

5 Special concretes and types of construction
5.1 High strength concrete
5.2 Liquid-impermeable concrete
5.3 Self compacting concrete (SCC)
5.4 Concrete with high sulfate resistance
5.5 Concrete with increased resistance to acid attack
5.6 Concrete with high resistance to freeze-thaw with and without de-icing agent
5.6.1 Concrete with high freeze-thaw resistance
5.6.2 Concrete with high resistance to freeze-thaw with de-icing agent
5.7 Sand-rich concrete
5.8 Fibre-reinforced concrete
5.9 Fair-faced concrete
5.10 Mass concrete
5.11 Dry building materials
5.12 Sprayed concrete
5.13 Recycled concrete / concrete with recycled aggregate
5.14 Concrete for road surfacing
5.15 Roller compacted concrete
5.16 Underwater concrete
5.17 Bored pile concrete / diaphragm wall concrete
5.18 Lightweight concrete
5.19 Precast concrete elements
5.20 Concrete products
5.21 Textile reinforced concrete

Appendix
1 Codes of practice
2 Guidelines
3 Standards and legal regulations
4 Members of the European Coal Combustion Products Association

Leseproben

Foreword to the First Edition
As an addition and a binder component, fly ash is nowadays an indispensable material for many applications of concrete. Our current level of knowledge and experience is based on a technical development that started in Germany in the mid-1960s and has been continued worldwide with intensive and extensive research work.
The conditions existing in power stations when firing pulverized coal cause a flour-fine, pozzolanic mineral material to form from the accompanying rock in the coal. Owing to its specific characteristics, it has a positive impact on the properties of fresh and hardened concrete, and enables high-grade, durable concretes to be produced in a cost-effective manner.
The use of fly ash in concrete is also highly beneficial from an economic and ecological perspective, as the smaller quantities of cement and aggregate used enable valuable resources to be conserved, energy to be saved and pollution and carbon dioxide emissions, which are unavoidable in the production of building materials, to be reduced.
In this book, the authors have combined the latest discoveries from the field of research with practical experience of the use and effects of fly ash in concrete for the user. We hope that this book delivers all the necessary information and provides interesting suggestions for the targeted use of fly ash in concrete, thus promoting the use of this valuable raw material.
Foreword to the Second Edition
After five years, the results of new research into the effect of fly ash in concrete and the properties of fly ash concrete, and their implementation in the rapidly changing regulations on the production of concrete have inspired the authors to extensively revise and update the Handbook on Fly Ash in Concrete. The situation as regards standards relating to this field as of August 2008 has also been incorporated. The authors hope that this Second Edition will prove to be a helpful, practical resource for the production of concrete with fly ash in compliance with the applicable standards.