1.1本试验方法包括测定泥浆施工技术中使用的泥浆密度，例如用于控制液体水平移动的屏障。本试验方法根据API推荐规程进行了修改 13B . 1.2 单位- 除非还规定了其他单位，例如以磅/英尺为单位的密度，否则以国际单位制表示的值应视为标准值 3. 或lbm/gal。本标准不包括其他测量单位。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 5.1本试验方法用于在实验室和现场测定膨润土泥浆的密度。对于新混合的泥浆，本试验方法可作为混合比例的指标。对于沟内泥浆，可规定一定值以保持沟渠稳定性。 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 D3740 通常认为能够胜任和客观的测试、抽样、检查等。本标准的用户应注意遵守惯例 D3740 本身不能确保可靠的结果。可靠的结果取决于许多因素； 实践 D3740 提供了一种评估其中一些因素的方法。

1.1 This test method covers the determination of the density of slurries used in slurry construction techniques, such as those used for barriers to control the horizontal movement of liquids. This test method is modified from API Recommended Practice 13B . 1.2 Units— The values stated in SI units are to be regarded as standard, unless other units are also specified, such as density in lbm/ft 3 or lbm/gal. No other units of measurement are included in this 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 5.1 This test method is used to determine the density of bentonitic slurries in the laboratory and field. For freshly mixed slurry, this test method may be used as an indicator of mix proportions. For in-trench slurry, a certain value may be specified for maintaining trench stability. Note 1 — The quality of the result produced by this standard depends on the competence of the personnel performing it and the suitability of the equipment and facilities being 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 ensure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.