Detail of GB/T 14902-2012

Introduction of GB/T 14902-2012

1 Scope This standard specifies the terms and definitions, classification, performance grade and mark, raw materials and mix proportion, quality requirements, preparation, test methods, inspection rules, ordering and delivery of ready-mixed concrete. This standard is applicable to ready-mixed concrete produced by mixing plant (tower). This standard does not cover pouring, vibrating and curing of concrete after delivery. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB 175 Common portland cement GB 200 Moderate heat portland cement - Low heat portland cement - Low heat portland slag cement GB/T 1596 Fly ash used for cement and concrete GB 8076 Concrete admixtures GB/T 9142 Concrete mixer GB 10171 Concrete mixing plant (tower) GB 13693 Road portland cement GB/T 17431.1 Lightweight aggregates and its test methods - Part 1: Lightweight aggregates GB/T 18046 Ground granulated blast furnace slag used for cement and concrete GB/T 18736 Mineral admixtures for high strength and high performance concrete GB/T 20491 Steel slag powder used for cement and concrete GB 23439 Expansive agents for concrete GB/T 25176 Recycled fine aggregate for concrete and mortar GB/T 25177 Recycled coarse aggregate for concrete GB/T 50080 Standard for test method of performance on ordinary fresh concrete GB/T 50081 Standard for test method of mechanical properties on ordinary concrete GB/T 50082 Standard for test methods of long-term performance and durability of ordinary concrete GB/T 50107 Standard for evaluation of concrete compressive strength GB 50119 Code for utility technical of concrete admixture GB 50164-2011 Standard for quality control of concrete GB 50204 Code for acceptance of constructional quality of concrete structures GB/T 50557 Technical code for barite concrete against radiation JC 475 Concrete anti-freezer JG/T 317 Granulated electric furnace phosphorus slag powder for concrete JG/T 315 Natural pozzolanic materials used for cement mortar and concrete JG/T 5094 Truck mixer JGJ 51 Technical specification for lightweight aggregate concrete JGJ 52 Standard for technical requirements and test method of sand and crushed stone (or gravel) for ordinary concrete JGJ 55 Specification for mix proportion design of ordinary concrete JGJ 63 Standard of water for concrete JGJ/T 193 Standard for inspection and assessment of concrete durability JGJ 206 Technical code for application of sea sand concrete JGJ/T 221 Technical specification for application of fiber reinforced concrete JGJ/T 240 Technical specification for application of recycled aggregate JTJ 270 Testing code of concrete for port and waterway engineering HJ/T 412 Technical requirement for environmental labeling products - Ready-mixed concrete 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 ready-mixed concrete concrete produced in the mixing plant (tower) and delivered to the place of use by transport equipment, which is mixture when delivered 3.2 ordinary concrete concrete with dry apparent density of 2,000 kg/m3~2,800 kg/m3 3.3 high strength concrete concrete with the strength grade not lower than C60

Contents of GB/T 14902-2012

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Classification, performance grade and mark 5 Raw materials and mix proportion 6 Quality requirements 7 Preparation 8 Test methods 9 Inspection rules 10 Ordering and delivery