1.1 本试验方法涵盖了用于测定抗压强度的受控低强度材料（CLSM）圆柱形试样的制备、固化、运输和试验程序。 1.2 该试验方法涵盖强度高于土壤但小于8400 kPa[1200 psi]的CLSM材料。大多数应用的典型强度在350至700千帕[50至100磅/平方英寸]之间。 1.3 用于制造模塑样品的CLSM应在所有- 已对混合料比例进行了现场调整，包括添加混合水和任何外加剂。 1.4 该试验方法可用于制备和测试其他土壤和胶结材料混合物的圆柱形试样，如自胶结粉煤灰。 1.5 CLSM也被称为可流动填料、控制密度填料、土壤水泥浆、土壤水泥浆液、不可收缩填料等类似名称。 1.6 单位- 以国际单位制或英寸磅单位表示的数值应单独视为标准。 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。将两个系统的值结合起来可能会导致不符合标准。 1.6.1 处理英寸磅单位时使用英寸磅单位的重力系统。在该系统中，磅（lbf）表示力（重量）的单位，而质量的单位是蛞蝓。除非涉及动态（F=ma）计算，否则未给出段塞单元。 1.7 所有观测值和计算值应符合实践中制定的有效数字和四舍五入指南 D6026型 ，除非被本标准取代。 1.7.1 为了将测量或计算值与规定限值进行比较，测量或计算的值应四舍五入至规定限值中最接近的小数或有效数字。 1.7.2 本标准中用于规定如何收集/记录和计算数据的程序被视为行业标准。 此外，它们代表了通常应保留的有效数字。所使用的程序不考虑材料变化、获取数据的目的、特殊目的研究或用户目标的任何考虑；并且通常的做法是增加或减少报告数据的有效数字以与这些考虑相称。考虑工程设计分析方法中使用的有效数字超出了本标准的范围。 1.8 本标准并非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。 参见第节 7. 。 1.9 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 该试验方法通过复制材料的“现场固化”，为CLSM试样在现场条件下的制备、固化、运输和测试提供了标准化要求。 5.1.1 如果试样按照本文规定进行现场固化，则所得抗压强度试验数据可用于以下目的: 5.1.1.1 规定强度的验收试验， 5.1.1.2 检查混合比例的强度是否足够， 5.1.1.3 质量控制 5.1.1.4 确定材料是否可以投入使用， 5.1.1.5 养护的充分性。 5.2 进行抗压强度测试是为了协助配合比的设计，并作为施工期间的质量控制技术。混合料设计通常基于28天的强度和浇筑后7天进行的施工控制测试。抗压强度和其他测试年龄将根据最终产品的要求而变化。有关CLSM的使用和历史记录的更多信息，请参阅 附录X1 。 5.3 该测试是施工期间可在CLSM上进行的一系列质量控制测试之一，以监测是否符合规范要求。CLSM施工控制期间可以使用的其他测试是实践 D5971/D5971米 和试验方法 D6023型 ， D6024/D6024米 和 D6103/D6103米 。 5.4 使用这种方法可以测试土壤、水泥、粉煤灰（无论是否胶结）、外加剂、水或其他材料的许多其他组合。 混合物将根据预期用途、材料可用性和浇筑要求而变化。 注1: 本标准产生的结果的质量取决于执行该标准的人员的能力以及所用设备和设施的适用性。符合实践标准的机构 第3740页 通常被认为能够胜任和客观的测试/取样/检查等。本标准的使用者应注意遵守实践 第3740页 其本身不能保证可靠的结果。可靠的结果取决于许多因素；实践 第3740页 提供了评估其中一些因素的方法。

1.1 This test method covers procedures for the preparation, curing, transporting and testing of cylindrical test specimens of controlled low strength material (CLSM) for the determination of compressive strength. 1.2 This test method covers CLSM materials that have a higher strength than the soil but less than 8400 kPa [1200 psi]. Typical strengths for most applications fall between 350 to 700 kPa [50 to 100 psi]. 1.3 The CLSM used to make the molded specimens shall be sampled after all on-site adjustments have been made to the mixture proportions, including the addition of mix water and any admixtures. 1.4 This test method may be used to prepare and test cylindrical specimens of other mixtures of soil and cementitious materials, such as self-cementing fly ashes. 1.5 CLSM is also known as flowable fill, controlled density fill, soil-cement slurry, soil-cement grout, unshrinkable fill, and other similar names. 1.6 Units— The values stated in SI units or inch-pound units are to be regarded separately as standard. 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 nonconformance with the standard. 1.6.1 The gravitational system of inch-pound units is used when dealing with inch-pound units. In the system, the pound (lbf) represents a unit of force (weight), while the units for mass is slugs. The slug unit is not given, unless dynamic (F = ma) calculations are involved. 1.7 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026 , unless superseded by this standard. 1.7.1 For purposes of comparing, a measured or calculated value(s) with specified limits, the measured or calculated value(s) shall be rounded to the nearest decimal or significant digits in the specified limits. 1.7.2 The procedures used to specify how data are collected/recorded and calculated in this standard are regarded as the industry standard. In addition, they are representative of the significant digits that should generally be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives; and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations. It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design. 1.8 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. See Section 7 . 1.9 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 This test method provides standardized requirements for the preparation, curing, transporting and testing of test specimens of CLSM under field conditions by replicating a “field cure” of the material. 5.1.1 If the specimens are field cured, as stipulated herein, the resulting compressive strength test data may be used for the following purposes: 5.1.1.1 Acceptance testing for specified strength, 5.1.1.2 Checking the adequacy of mixture proportions for strength, 5.1.1.3 Quality control, 5.1.1.4 Determining if the material can be put in service, 5.1.1.5 Adequacy of curing. 5.2 Compressive strength testing is performed to assist in the design of the mix and to serve as a quality control technique during construction. Mix design is typically based on 28-day strengths and construction control tests performed 7 days after placement. The compressive strength(s) and other test age(s) will vary according to the requirements for the end product. Additional information on the use and history of CLSM is contained in Appendix X1 . 5.3 This test is one of a series of quality control tests that can be performed on CLSM during construction to monitor compliance with specification requirements. The other tests that can be used during construction control of CLSM are Practice D5971/D5971M and Test Methods D6023 , D6024/D6024M , and D6103/D6103M . 5.4 There are many other combinations of soil, cement, fly ash (cementitious or not), admixtures, water or other materials that could be tested using this method. The mixtures will vary depending on the intended use, availability of materials, and placement requirements. Note 1: The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.