91.100.30 混凝土和混凝土制品 标准查询与下载

ASTM A1115/A1115M-24 用不可扩展土壤加固的机械稳定土墙施工的标准实施规程

Standard Practice for Construction of Mechanically Stabilized Earth Walls with Inextensible Soil Reinforcement

BS ISO 16311-4:2024 混凝土结构的维护和修理 执行修理

Maintenance and repair of concrete structures - Execution of repairs

GSO ASTM C858:2024 地下预制混凝土公用设施结构的标准规范

This specification covers the recommended design criteria and manufacturing practices for monolithic or sectional precast concrete utility structures. Forms shall be accurately constructed and strong enough to maintain the structure's dimensions within the tolerances. Forms shall be cleaned before each use. The aggregates shall be sized, graded, proportioned, and thoroughly mixed in a batch mixer with proportions of cement and water as will produce a homogeneous concrete having the required specified compressive strength. Concrete shall be deposited as nearly as practicable in its final position. Structures shall be cured by an accepted industry method that will develop the required 28-day compressive strength without affecting the long-term durability of the concrete. The elastic method of structural design or the strength design method of reinforced concrete design, shall be used to design the concrete sections, including the reinforcement required, when the structure is subjected to the specified loading conditions. The structural design shall take into consideration the number, placement, and size of access openings. The minimum floor thickness resulting from slope shall be considered as the nominal floor thickness in the design of the structure. Duct terminators, knockouts, and sumps shall be designed to carry the loads imposed upon them. Compressive-strength of the concrete shall be tested to meet the requirements prescribed. Joints in sectional precast concrete structure shall be designed so as to be self-aligning when assembling sections of the structure. Design of lifting devices shall conform to requirements specified.

Standard Specification for Underground Precast Concrete Utility Structures

GSO EN 12390-6:2024 硬化混凝土的试验 第6部分：试样的抗拉强度

This European Standard specifies a method for the determination of the tensile splitting strength of cylindrical test specimens of hardened concrete. A method using cubic or prismatic specimens is included in normative Annex A.

Testing hardened concrete - Part 6: Tensile splitting strength of test specimens

GSO ASTM C618:2024 混凝土用煤灰和生或煅烧天然火山灰的标准规范

This specification covers coal fly ash and raw or calcined natural pozzolan for use in concrete where cementitious or pozzolanic action, or both, is desired, or where other properties normally attributed to fly ash or pozzolans may be desired, or where both objectives are to be achieved. Fly ash and natural pozzolans shall conform to the prescribed chemical composition requirements and physical requirements. The materials shall be tested for fineness, strength activity index, water requirement, soundness, and autoclave expansion or contraction.

Standard Specification for Coal Ash and Raw or Calcined Natural Pozzolan for Use in Concrete

GSO EN 772-2:2024 砌体试验方法 第2部分：混凝土砌体中空隙面积百分比的测定（纸压痕法）

This European Standard specifies a method of determining the percentage area of voids in aggregate concrete masonry units.

Methods of test for masonry units - Part 2: Determination of percentage area of voids in aggregate concrete masonry units (by paper indentation)

GSO ASTM C309:2024 混凝土养护用液体成膜化合物的标准规范

This specification covers liquid membrane-forming compounds suitable for application to concrete surfaces to reduce the loss of water during the early-hardening period. White-pigmented membrane-forming compounds serve the additional purpose of reducing the temperature rise in concrete exposed to radiation from the sun. The membrane-forming compounds covered by this specification are suitable for use as curing media for fresh concrete, and may also be used for further curing of concrete after removal of forms or after initial moist curing. Liquid membrane-forming compound types 1 and 1-D shall be clear or translucent. Type 2 liquid membrane-forming compounds shall consist of finely-divided white pigment and vehicle, ready-mixed for immediate use as is. Liquid membrane-forming compounds, when tested, shall restrict the loss of water not more than the requirements prescribed. Type 2 liquid membrane-forming compounds, when tested, shall exhibit a daylight reflectance of not less than 60 %. Liquid membrane-forming compounds, when tested, shall dry to touch in not more than 4 h.

Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete

GSO EN 12390-4:2024 硬化混凝土试验 第4部分：抗压强度 试验机规范

This document specifies the requirements for the performance of compression testing machines for the measurement of the compressive strength of concrete.

Testing hardened concrete - Part 4: Compressive strength - Specification for testing machines

GSO EN 12390-1:2024 硬化混凝土试验 第1部分：试样和模具的形状、尺寸和其他要求

This document specifies the shapes, dimensions and tolerances of cast concrete test specimens in the form of cubes, cylinders and prisms, and of the moulds required to produce them. NOTE The tolerances specified in this document are based on the needs of strength testing, but they can be applicable to tests for other properties.

Testing hardened concrete - Part 1: Shape, dimensions and other requirements for specimens and moulds

GSO EN 1170-2:2024 预制混凝土产品 玻璃纤维增强水泥试验方法 第2部分：测量新鲜 GRC 中的纤维含量 “冲洗试验”

This European Standard specifies a test method for verifying the fibre content and the uniformity of distribution in the finished products and for monitoring the consumption of fibres.

Precast concrete products - Test method for glass-fibre reinforced cement - Part 2: Measuring the fibre content in fresh GRC, "Wash out test"

GSO ISO 1920-2:2024 混凝土试验— 第2部分：新鲜混凝土的特性

ISO 1920-2:2016 specifies procedures for testing fresh concrete. It specifies the following test methods: determination of consistence (slump test, Vebe test, degree of compactability, flow-table test for high‑fluidity concrete, and the slump-flow test), determination of fresh density and determination of air content by the pressure-gauge method and by the water-column method.

Testing of concrete — Part 2: Properties of fresh concrete

GSO EN 12390-5:2024 硬化混凝土的试验 第5部分：试件的抗弯强度

This document specifies a method for the determination of the flexural strength of specimens of hardened concrete.

Testing hardened concrete - Part 5: Flexural strength of test specimens

GSO EN 12390-2:2024 硬化混凝土测试 第2部分：强度测试样品的制作和固化

This document specifies methods for making and curing test specimens for strength tests. It covers the preparation and filling of moulds, compaction of the concrete, levelling the surface, curing of test specimens and transporting test specimens. NOTE This document can be used for the making and curing of specimens for other test methods.

Testing hardened concrete - Part 2: Making and curing specimens for strength tests

GSO EN 12390-7:2024 硬化混凝土的测试 第7部分：硬化混凝土的密度

This document specifies a method for determining the density of hardened concrete. It is applicable to lightweight, normal-weight and heavy-weight concrete. It differentiates between hardened concrete in the following states: 1) as-received; 2) water saturated; 3) oven-dried. The mass and volume of the specimen of hardened concrete are determined and the density calculated.

Testing hardened concrete - Part 7: Density of hardened concrete

GSO EN 1170-6:2024 预制混凝土产品 玻璃纤维增强水泥试验方法 第6部分：浸没法测定吸水率和干密度测定

This European Standard specifies a test for determining the dry density and water absorption of a given GRC composition.

Precast concrete products - Test method for glass-fibre reinforced cement - Part 6: Determination of the absorption of water by immersion and determination of the dry density

GSO ASTM C1074:2024 用成熟度法评估混凝土强度的标准规范

1.1 This practice provides a procedure for estimating concrete strength by means of the maturity method. The maturity index is expressed either in terms of the temperature-time factor or in terms of the equivalent age at a specified temperature. 1.2 This practice requires establishing the strength-maturity relationship of the concrete mixture in the laboratory and recording the temperature history of the concrete for which strength is to be estimated. 1.3 The values stated in SI units are to be regarded as standard for determining the maturity index. No other units of measurement are included for this purpose. There is, however, no restriction on the system of units for expressing strength in developing the strength-maturity relationship. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.2 ) 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Standard Practice for Estimating Concrete Strength by the Maturity Method

GSO EN 12504-1:2024 结构混凝土试验 第1部分：芯样 压缩取样、检查和试验

This document specifies a method for taking cores from hardened concrete, their examination, preparation for testing and determination of compressive strength. This document does not give guidance on the decision to drill cores or on the locations for drilling. This document does not provide procedures for interpreting the core strength results. For the assessment of in situ compressive strength in structures and precast concrete components, EN 13791 may be used.

Testing concrete in structures - Part 1: Cored specimens - Taking, examining and testing in compression

GSO ISO 23523:2024 纤维增强水泥基复合材料离散聚合物纤维的试验方法

This document specifies the test methods for discrete polymer fibre for fibre-reinforced cementitious composites (FRCC). This document defines the test methods for discrete polymer fibre, such as diameter, length, tensile strength, initial modulus of elasticity, density, melting point, moisture content and alkaline durability as basic items. These are test methods intended for certification of a fibre and not for quality control or field acceptance.

Test methods for discrete polymer fibre for fibre-reinforced cementitious composites

GSO ISO 1920-6:2024 混凝土试验 第6部分：混凝土芯的取样、制备和试验

This document specifies a method for taking cores from hardened concrete, their examination, preparation for testing and determination of compressive strength. This document does not give guidance on the decision to drill cores or on the locations for drilling and does not provide procedures for interpreting the core strength results. It is recommended that before coring, full agreement should be reached by all parties on the need for core testing and how the results should be interpreted.

Testing of concrete — Part 6: Sampling, preparing and testing of concrete cores

GSO ISO 1920-3:2024 混凝土试验— 第3部分：试样的制作和养护

This document specifies the shape and dimensions of concrete test specimens for strength tests and the methods of making and curing these test specimens.

Testing of concrete — Part 3: Making and curing test specimens