ДСТУ CEN/TR 16369:2022 Використання контрольних карт у виробництві бетону (CEN/TR 16369:2012, IDT)
ДСТУ CEN/TR 16369:2022
(CEN/TR 16369:2012, IDT)
Використання контрольних карт у виробництві бетону
Не є офіційним виданням.
Офіційне видання розповсюджує національний орган стандартизації
(ДП «УкрНДНЦ» http://uas.gov.ua)
Contents
Foreword
Introduction
1 Scope
2 Symbols and abbreviations
3 Statistics for Concrete
3.1 Normal distribution of strength
3.2 Characteristic strength and target strength
3.3 Standard deviation
3.4 Setting the target strength
4 Simple Data Charts
5 Shewhart Charts
5.1 Introduction
5.2 Shewhart action criteria
5.2.1 Points beyond UCL or LCL
5.2.2 Points beyond UWL or LWL
5.2.3 Patterns within control limits
5.3 Control of standard deviation
5.4 Example Shewhart chart
5.5 Modified application of Shewhart control chart
6 CUSUM
6.1 Introduction
6.2 Controlling mean strength
6.3 Controlling standard deviation
6.4 Controlling correlation
6.5 Design of V-mask
6.6 Action following change
7 Multivariable and Multigrade Analysis
7.1 General
7.2 Multivariable
7.3 Multigrade
8 Speeding the Response of the System
8.1 Early age testing
8.2 Family of mixes concept
9 Guidance on Control Systems
9.1 Abnormal Results
9.2 Handling mixes outside the concrete family
9.3 Handling mixes not controlled by compressive strength requirements
9.4 Test rates
9.5 Action following change
10 EN 206-1 Conformity Rules for Compressive Strength
10.1 Basic requirements for conformity of compressive strength
10.2 Assessment period
10.3 Conformity rules for compressive strength
10.4 Achieving an AOQL of 5 % with CUSUM
10.5 Non-conformity
11 Implementing Control Systems
12 CUSUM Example
12.1 Reference mix and concrete family
12.2 Main relationship
12.3 Applying adjustments
12.4 CUSUM calculation
12.5 CUSUM action following change
12.6 Further data and a change in standard deviation
Bibliography
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