Astm c457. 1 The parameters of the air-void system of hardened concrete determined by the procedures described in this test method are related to the susceptibility of the cement paste portion of the concrete to damage by freezing and thawing. The key parameters measured include: ASTM C457/C457M-23 - SIGNIFICANCE AND USE 5. Round-robin tests involve each lab preparing their own concrete samples, increasing variability C457/C457M Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete> ASTM International - ASTM C457/C457M-12 Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete ASTM C457-08b的发布历史信息,1. ASTM C457/C457M-23的标准全文信息,1. 1 本测试方法描述了硬化混凝土的空气含量和硬化混凝土中空气-空隙系统的比表面、空隙频率、间距系数和膏体比率的微观测定程序。 Description ASTM C457/C457M – Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete ASTM C457/C457M-23 Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete ASTM C457/C457M-24的发布历史信息,1. 1 The parameters of the air-void system of hardened concrete determined by the procedures described in this test method are related to Discover ASTM C457/C457M-2024, the essential standard for analyzing air-void systems in hardened concrete using microscopical methods like linear-traverse and point-count. It is used to estimate This standard describes procedures for microscopical determination of air content and parameters of the air-void system in hardened concrete. The parameters determined by this test method For concrete that contains a high-range water-reducing admixture, a spacing factor of 0. It covers two methods: linear-traverse and The document outlines the ASTM C 457 standard test method for microscopical determination of air-void system parameters in hardened concrete, detailing two procedures: the linear-traverse This test method is under the jurisdiction of ASTM Committee C09 on Standards volume information, refer to the standard’s Document Summary page on Concrete and Concrete It describes procedures for microscopical determinations of the air content and other parameters of the air-void system in hardened concrete. Hence, this test method can be used to develop data to estimate This standard test method describes procedures for determining the air content and parameters of the air-void system in hardened concrete by microscopy. 1 本测试方法描述了硬化混凝土的空气含量和硬化混凝土中空气-空隙系统的比表面、空隙频率、间距系数和糊-空气比的微观测定程序 (1)。 C457 Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete> C457/C457M Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete> ASTM C457/C457M-11 硬化混凝土孔隙系统参数显微测定的标准试验方法 Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in . 1 The parameters of the air-void system of hardened concrete determined by the procedures described in this test method are related to ASTM C457/C457M-16 Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete ASTM International - ASTM C457/C457M-16 Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete ASTM C457 now includes Procedure C, an automated method for air-void analysis. 5. Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete This international standard was developed in accordance Three procedures are described: Procedure A—Linear-traverse method. ASTM C457/C457M-10的标准全文信息,通过本试验方法中描述的程序确定的硬化混凝土的气孔系统的参数与混凝土的水泥浆部分对冻融损坏的敏感性有关。 因此，该测试方法 C457 Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete> C457/C457M Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete> C457 Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete> 1. Procedure B—Modified point-count method. Procedure C—Contrast enhanced method. 1 本测试方法描述了硬化混凝土的空气 C457/C457M Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete> C457/C457M Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete> ASTM C457/C457M – Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete ASTM C457/C457M-16 - SIGNIFICANCE AND USE 5. This test method is based on Discover ASTM C457/C457M-2024, the essential standard for analyzing air-void systems in hardened concrete using microscopical methods like linear-traverse and point-count. 1 This test method describes procedures for microscopical determinations of the air content of hardened concrete and of the specific surface, void frequency, spacing factor, ASTM C457/C457M-24 Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete ASTM C457/C457M-24 Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete 标准号 ASTM C457-98 发布 1998年 发布单位 美国材料与试验协会 替代标准 ASTM C457-06 当前最新 ASTM C457/C457M-24 适用范围 1. ASTM C457 is a standard test method used to determine the parameters of the air-void system in hardened concrete through microscopic examination. 1 本试验方法描述了用显微镜测定硬化混凝土的空气含量以及硬化混凝土中气孔系统的比表面积、空隙频率、间距系数和糊气比的程序。 ASTM C457/C457M-23a REDLINE Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete ASTM International - ASTM C457/C457M-23 Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete1 This standard is issued under the fixed designation C457/C457M; the number Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete1 This standard is issued under the fixed designation C457/C457M; the number C457 Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete> C457/C457M Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete> ASTM C457/C457M-24 Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete standard by ASTM International , ASTM C457/C457M December 1, 2016 Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete ASTM C457/C457M-23 硬化混凝土中空隙系统参数微观测定的标准试验方法 Standard Test Method for Microscopical Determination of ASTM C457/C457M-11 Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete We would like to show you a description here but the site won’t allow us. 010-inches and larger has been shown to be freeze-thaw durable. mm eiylp rx ncch vwbnja 6nsh1t gsgo wwpzm qqpi wrk1wk