Header
About this publication
Preface
1 Scope and general
1.1 Scope
1.2 Referenced documents
1.3 Definitions
1.4 Notation
1.5 Specification of concrete
1.5.1 General
1.5.2 Standard strength grades
1.5.3 Normal-class concrete
1.5.3.1 General
1.5.3.2 Basic parameters
1.5.4 Special-class concrete
1.6 Methods of ordering
1.7 Basis of supply
1.7.1 General
1.7.2 Volume of plastic concrete
1.7.3 Identification certificate
2 Concrete constituents
2.1 General
2.2 Cement constituents
2.2.1 Portland cement
2.2.2 Blended cement
2.2.3 Fly ash
2.2.4 Ground slag
2.2.5 Amorphous silica
2.3 Aggregates
2.4 Mixing water
2.5 Chemical admixtures
2.6 Other materials
2.7 Limitations on chemical content of concrete
2.7.1 Chemical admixtures
2.7.2 Sulfate content
2.7.3 Chloride content
2.8 Alkali aggregate reaction
3 Plant and equipment
3.1 General
3.2 Storage containers
3.2.1 Cement and supplementary cementitious material
3.2.2 Aggregate
3.2.3 Water
3.2.4 Chemical admixtures
3.3 Weighing equipment
3.3.1 Indicating devices
3.3.2 Accuracy
3.3.3 Weigh-hoppers
3.3.4 Continuous feed weighers
3.4 Liquid dispensing equipment
3.4.1 Indicating devices
3.4.2 Accuracy of metering
3.4.3 Maintenance
3.5 Mixers
3.5.1 General
3.5.2 Batch mixers
3.5.2.1 Mixer controls
3.5.2.2 Rated mixing capacity
3.5.2.3 Minimum mixing criteria
3.5.2.4 Determination of minimum mixing time or number of revolutions
3.5.2.5 Identification plates
3.5.3 Continuous mixers
3.5.3.1 Charging rate
3.5.3.2 Identification plates
4 Production and delivery
4.1 General
4.1.1 Production processes
4.1.2 Method of measuring quantities of ingredients
4.1.3 Bases for determinations of mass
4.1.4 Method of batching ingredients
4.1.5 Sequence of introduction of materials
4.1.6 Records
4.2 Batch production
4.2.1 Tolerances on batch ingredients
4.2.1.1 Ingredients other than water
4.2.1.2 Water
4.2.2 Batch mixing
4.2.2.1 General
4.2.2.2 Central mixing
4.2.2.3 Mobile mixing
4.2.2.4 Staged mixing
4.2.3 Addition of water to a mixed batch
4.2.4 Addition of admixtures and other materials to a mixed batch
4.2.5 Period for completion of discharge
4.3 Continuous production
4.3.1 Feeding materials
4.3.1.1 Solid ingredients
4.3.1.2 Liquid ingredients
4.3.1.3 Accuracy of flow rates for cementitious materials
4.3.1.4 Accuracy of flow rates for coarse, fine and total aggregates
4.3.2 Mixing
4.4 Delivery
4.4.1 General
4.4.2 Temperature at point of delivery
4.4.3 Duration of delivery
5 Sampling and testing of concrete
5.1 General
5.1.1 Sampling and testing
5.1.2 Grouping of plants
5.1.3 Customer access
5.2 Slump
5.2.1 Frequency of testing
5.2.2 Determination of slump
5.2.3 Compliance
5.2.4 Repeat tests for slump
5.3 Strength
5.3.1 28 day characteristic strength
5.3.2 Strength other than 28 day characteristic strength
5.3.3 Compliance
5.3.4 Action to be taken on non-compliance
5.4 Air content
5.4.1 Frequency of sampling
5.4.2 Determination of air content
5.4.3 Compliance
5.4.4 Repeat tests for air content
5.5 Chloride and sulfate content
5.5.1 Frequency of sampling
5.5.2 Determination of content
5.5.3 Compliance
5.6 Drying shrinkage
5.6.1 Drying shrinkage of normal-class concrete
5.6.1.1 Frequency of sampling
5.6.1.2 Determination of shrinkage by field sampling
5.6.1.3 Determination of shrinkage by laboratory mixing and testing
5.6.1.4 Compliance
5.6.2 Drying shrinkage of special-class concrete
5.7 7 Day strength of normal-class concrete
5.8 Other parameters
6 Sampling, testing and assessment for compliance of concrete specified by compressive strength
6.1 General
6.2 Sampling and testing
6.2.1 General
6.2.2 Sampling
6.2.3 Making and curing of cylinder specimens
6.2.4 Testing of cylinder specimens
6.2.5 Test strength of samples
6.2.5.1 Strength of sample
6.2.5.2 Difference in strength
6.3 Production assessment
6.3.1 Basic requirements of production control
6.3.1.1 General requirement
6.3.1.2 Designation of grades
6.3.1.3 Frequency of assessment
6.3.1.4 Assessment factor
6.3.1.5 Assessment of grade
6.3.2 Grade being assessed
6.3.3 Sampling frequency
6.3.4 Production interval
6.3.5 Standard deviation
6.3.5.1 Standard deviation of a controlled grade
6.3.5.2 Sample size for the standard deviation of a controlled grade
6.3.5.3 Standard deviation for an associated grade
6.3.6 Grouping of plants to determine nc and sc
6.3.7 Action on non-compliance
6.3.7.1 Check on adequacy of concrete
6.3.7.2 Adjustment to mix designs
6.3.8 Early age assessment of controlled grades
6.4 Recording and dissemination of production assessment information
6.4.1 Records and reports of test results
6.4.2 Reports for production assessment
6.4.3 Dissemination of production assessment information
6.4.4 Notification of potentially low strength
6.5 Project assessment of strength grade
6.5.1 General
6.5.2 Additional project assessment for plants subject to production assessment
6.6 Assessment by alternative methods with an accepted operating characteristic
Appendix A
A1 General
A2 Test procedures
A2.1 Mix used for uniformity tests
A2.2 Batch mixers
A2.3 Continuous mixers
A2.4 Sampling procedures
A2.4.1 End-discharge batch mixers
A2.4.2 Split-drum mixers
A2.4.3 Continuous mixers
A3 Determination of properties of plastic concrete samples
A3.1 General
A3.2 Slump
A3.3 Air content
A3.4 Mass per unit volume of the concrete
A3.5 Coarse aggregate content
A3.6 Mass per unit volume of the air-free mortar
A4 Compliance with uniformity
Appendix B
Appendix C
C1 Scope
C2 Statistical sampling
C3 Product certification
C4 Supplier’s quality management system
C5 Other means of assessment
Amendment control sheet
AS 1379—2007
Amendment No. 1 (2009)
Correction
Amendment No. 2 (2015)
Revised text
