1.1 本试验方法包括圆柱形混凝土试样（如成型圆柱体和钻孔芯）抗压强度的测定。它仅限于密度超过800 kg/m的混凝土 3. [50磅/英尺 3. ]. 1.2 以国际单位制或英寸磅单位表示的数值应单独视为标准。括号中显示了英寸磅单位。每个系统中规定的值可能不是完全相等的；因此，每个系统应独立使用。将两个系统的值合并可能导致不符合标准。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。 本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 ( 警告 应提供在试样突然破裂时容纳混凝土碎片的方法。突然破裂的趋势随着混凝土强度的增加而增加，当试验机相对灵活时更容易发生。中给出的安全预防措施 R0030 建议使用。） 1.4 本标准的文本引用了提供解释性材料的注释。这些注释不应被视为本标准的要求。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 由于强度不是由给定材料制成的混凝土的基本或固有特性，因此在解释通过该试验方法测定抗压强度的重要性时必须小心。获得的值取决于试样的尺寸和形状、配料、混合程序、取样、成型和制造方法以及固化过程中的老化、温度和湿度条件。 5.2 本试验方法用于测定根据实践制备和固化的圆柱形试样的抗压强度 C31/C31M , 192/C192M , C617/C617M , C943 , C1176/C1176M , C1231/C1231米 和 C1435/C1435米 ，和测试方法 C42/C42M , C873/C873米 和 C1604/C1604米 . 5.3 该试验方法的结果被用作混凝土配比、搅拌和浇筑操作的质量控制的基础；确定是否符合规范；外加剂有效性评估控制；以及类似用途。 5.4 对混凝土圆柱体进行验收试验的个人应符合《实践》中混凝土实验室技术人员的要求 C1077 ，包括由独立审查员评估的需要表现证明的考试。 注1: 相当于ACI混凝土实验室技术员、一级或ACI混凝土强度测试技术员最低指南的证书将满足此要求。

1.1 This test method covers determination of compressive strength of cylindrical concrete specimens such as molded cylinders and drilled cores. It is limited to concrete having a density in excess of 800 kg/m 3 [50 lb/ft 3 ]. 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The inch-pound units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.3 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— Means should be provided to contain concrete fragments during sudden rupture of specimens. Tendency for sudden rupture increases with increasing concrete strength and it is more likely when the testing machine is relatively flexible. The safety precautions given in R0030 are recommended.) 1.4 The text of this standard references notes which provide explanatory material. These notes shall not be considered as requirements of the standard. 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. ====== Significance And Use ====== 5.1 Care must be exercised in the interpretation of the significance of compressive strength determinations by this test method since strength is not a fundamental or intrinsic property of concrete made from given materials. Values obtained will depend on the size and shape of the specimen, batching, mixing procedures, the methods of sampling, molding, and fabrication and the age, temperature, and moisture conditions during curing. 5.2 This test method is used to determine compressive strength of cylindrical specimens prepared and cured in accordance with Practices C31/C31M , C192/C192M , C617/C617M , C943 , C1176/C1176M , C1231/C1231M , and C1435/C1435M , and Test Methods C42/C42M , C873/C873M , and C1604/C1604M . 5.3 The results of this test method are used as a basis for quality control of concrete proportioning, mixing, and placing operations; determination of compliance with specifications; control for evaluating effectiveness of admixtures; and similar uses. 5.4 The individual who tests concrete cylinders for acceptance testing shall meet the concrete laboratory technician requirements of Practice C1077 , including an examination requiring performance demonstration that is evaluated by an independent examiner. Note 1: Certification equivalent to the minimum guidelines for ACI Concrete Laboratory Technician, Level I or ACI Concrete Strength Testing Technician will satisfy this requirement.