Detail of T/CECS 10132-2021

Introduction of T/CECS 10132-2021

Long-span prestressed concrete hollow-core slabs 1 Scope This document specifies the specification & marking, requirements, test methods, inspection rules, labeling, storage and transportation, as well as quality certificate of long-span prestressed concrete hollow-core slabs. This document is applicable to the production and inspection of long-span prestressed concrete hollow-core slabs produced with special automation equipment and long line prestressed pretensioned process. 2 Normative references The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB 175 Common portland cement GB/T 5223 Steel wires for prestressed concrete GB/T 5224 Steel strand for prestressed concrete GB 8076 Concrete admixtures GB/T 50002 Standard for modular coordination of building GB 50010 Code for design of concrete structures GB/T 50081 Standard for test methods of concrete physical and mechanical properties GB/T 50107 Standard for evaluation of concrete compressive strength GB 50119 Code for utility technical of concrete admixture GB/T 50146 Technical code for application of fly ash concrete GB/T 50152 Standard for test method of concrete structures GB 50204 Code for acceptance of constructional quality of concrete structures GB 50666 Code for construction of concrete structures GB/T 51003 Technical code for application of mineral admixture GB/T 51231 Technical standard for assembled buildings with concrete structure JC/T 949 Mould release agent for concrete products JC/T 2477 Admixture for precast concrete JG/T 520 Test method for compressive strength of extrusion 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 241 Technical specification for application of manufactured sand concrete 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 long-span prestressed concrete hollow-core slabs prestressed pretensioned concrete slab hollow-core member composed of multiple regularly-arranged full-length holes, with marking length of 3m~21m and standardized slab thickness and marking width Note: Hereinafter referred to as “hollow-core slab”. 3.2 long line prestressed pretensioned process process as follows for producing precast concrete member: tension prestressed tendons and temporarily anchor them with fixtures on a former platform with length not less than 100m, then, pour concrete and arrange the prestressed pretensioned tendons when the concrete reaches the specified strength to form prestress 3.3 gap minimum clear distance between hollow-core slabs when the slabs are designed and arranged Note: The gap is divided into slab end gap and slab side gap. 3.4 extrusion technology technology for producing hollow-core slab formed by extruding and compacting stiff concrete via the combined action of the screw feeder and the built-in vibration device when the special automation equipment is moved along the former platform 3.5 slip-former technology technology for producing hollow-core slab formed by vibrating and stamping stiff concrete via the action of the vibration device when the special automation equipment is moved along the former platform 4 Specification and marking 4.1 Specification 4.1.1 Length dimension 4.1.1.1 The marking length (l) of hollow-core slab shall be the span of the axis; the production length (lp) of the hollow-core slab shall be the marking length minus the slab end gap (g) (Figure 1); the slab end gap (g) shall not be less than 20mm and shall be determined in the design document. Key: 1——hollow-core slab 2——supporting member l——marking length lp——production length g——slab end gap, g＝g1＋g2 g1, g2——distance between axis and slab end Figure 1 Schematic diagram of longitudinal length of hollow-core slab 4.1.1.2 The marking length (l) of hollow-core slab shall be within the specified length, 3≤ l ≤21m. 4.1.2 Sectional dimension 4.1.2.1 The thicknesses (h) of hollow-core slab shall be: 100mm, 120mm, 150mm, 160mm, 180mm, 200mm, 220mm, 240mm, 250mm, 265mm, 300mm, 320mm, 350mm, 360mm, 370mm, 380mm, 400mm, 450mm or 500mm.

Contents of T/CECS 10132-2021

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Specification and marking 5 Requirements 6 Test methods 7 Inspection rules 8 Marking, stacking and transportation 9 Certification documents Annex A (Informative) Types and schematics of longitudinal side slots of hollow-core slab Annex B (Informative) Section forms and characteristics of hollow-core slab members Annex C (Informative) Mechanical property indicators of typical reinforcement of hollow-core slab members Annex D (Normative) Production process requirements of hollow-core slab