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Caractéristiques du livre :
- Auteur: Ken W. Day
- Editeur: Sponpress
- Date de parution:
- Format: Relié
- Dimensions: 17 cm x 23 cm x 3 cm
- Nombre de pages:
- Prix indicatif: 92,02 € - Acheter ce livre sur

Book Description

This book promotes a general understanding of the process by which low variability concrete can be produced to a given requirement, and aims to present the simplest possible process of effective mix design and quality control. This new edition illustrates how the use of computers and high-tech testing equipment can reduce costs and improve efficiency in controlling both ordinary and high performance concrete. The CD provides a working example of concrete mix design in a high quality windows environment.

About the author

Ken W. Day has been involved in the development of concrete mix design and quality control systems since the early 1950s. He has run his consultancy Concrete Advice Pty Ltd since 1973 and has written and lectured extensively throughout the world.

Table des matières

Preface to second edition
Preface to first edition
Foreword John J. Peyton
Bryant Mather
Joe D. Dewar
Design of concrete mixes
Design criteria
Use of strength as a basis
Considerations other than strength
Selection of design strength
The cube/cylinder relationship
Flexural and tensile strength
Some historical and alternative systems of
mix design
1:2:4 mixes
Ideal grading curves
Gap gradings
Road Note 4
BRE/DOE system
Manual use of Conad system
The ACI system
Trial mix methods
Dewar: particle interference and void filling
de Larrard: void filling and maximum paste thickness
Brusin method
RILEM Technical Committee TC 70-OMD
Assessment of alternatives
The Conad Mixtune method of mix design
Validation of the method
Providing service to an existing major producer
The Conad concept: MSF, EWF and SS
Specific surface
Surface modulus
Particle shape
Modified specific surface
Silt content
Packing considerations
Temperature/time effect
Water factor (including water-reducing admixture effect)
Pozzolanic materials and slag
Overall water predictions
Fine aggregate water requirement related to
void percentage and flow time
Strength considerations
Yield and unit weight
Trial mixes
Implementation systems
High strength/high performance concrete
Philosophy and techniques of quality control
Historical evolution
The nature of concrete variability
Quality control techniques
Control charts
Computerization of QC procedures
The Conad quality control system
Development of the system
Essential features
Comprehensive integration
Data storage and retrieval
Computer batching analysis
Field and laboratory test data input
Data retrieval and analysis
Multigrade, multivariable analysis
Single grade analysis
Material properties
Test details and certificates
Statistical table
Integration of batching data with concrete
test data
Evaluation of relative efficiency in mixes
Early age testing
Prediction of 28-day strength
Number of specimens per sample
Depression of mean strength by testing error
A self-regulating batch plant?
Specification of concrete quality
Deficiencies of existing specification techniques
Specification basis
Cash penalty specifications
Rapid reaction to unsatisfactory quality
Specification of methods, equipment and facilities
Specification of early age strength
Proposal--approval specifications
The recommended specification
Small volume projects or plants
Aggregates for concrete
Fine aggregate (sand)
Coarse aggregate
Lightweight aggregates
Blast furnace slag
Cementitious and pozzolanic materials
Portland cement
Fly ash
Blast furnace slag
Silica fume
Rice hull ash
Superfine fly ash
Colloidal silica
Chemical admixtures
Specifying admixture usage
Possible reasons for using admixture
Types of admixtures available
Statistical analysis
The normal distribution
Permissible percentage defective
Variability of means of groups
Variability of standard deviation assessment
Components of variability
Testing error
Coefficient of variation
Practical significance
Range of tests
Permeability testing
Compression testing
Testing machines
Testing machine technology
Bad concrete or bad testing?
Rounding results
Cubes versus cylinders
Non-destructive testing
Fresh concrete tests
Changing concepts
Maturity/equivalent age
Cash penalty specification
What is economical concrete?
Industrial floor surfaces
How soon is soon enough?
Inadequate strength
Poor workability/pumpability
Unsatisfactory appearance
Causes of cracking in concrete slabs
Summary and conclusions
About the CD-ROM

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