1.1这些试验方法提供了对压实的土壤-石灰混合物进行膨胀、收缩和扬压力试验的程序，并可用于确定所需的石灰含量，以实现对水分增加或减少引起的体积变化的预期控制。 1.2试验可用于确定 (1) 不同负载条件下的体积变化幅度， (2) 体积变化率，以及 (3) 压力的大小随着土壤水分的变化而变化- 发生石灰混合物。如果需要，也可以在各种负载条件下确定土壤-石灰混合物的渗透性。 注1-现场条件的变化可能对膨胀土的膨胀和收缩特性产生重大影响。因此，应尽可能复制初始和预期的未来现场条件，尤其是在湿度和密度方面。 1.3所有观察值和计算值应符合实施规程D 6026中建立的有效数字和舍入准则 1.3.1本标准中用于规定如何收集、计算或记录数据的方法与数据可用于设计或其他用途或两者的准确性没有直接关系。如何应用使用本标准获得的结果超出了其范围。 1.4以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.5 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====== 通过这些试验，可以评估含有不同数量石灰的土壤-石灰混合物的相对膨胀潜力。通过这样的评估，可以确定将膨胀降低到可接受水平所需的石灰量。然后，这些数据可用于结构填料和路基填料的设计和规范要求，其中遇到膨胀土，并且需要提供一定程度的膨胀- 结构基础和路基的收缩控制。测试还将显示特定土壤是否适合石灰稳定。 笔记 2-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D 3740标准的机构 通常认为能够胜任和客观的测试/采样/检查/等。本标准的用户应注意遵守实施规程D 3740 本身并不能保证可靠的结果。可靠的结果取决于许多因素；实践D 3740 提供了一种评估其中一些因素的方法。

1.1 These test methods provide procedures for conducting expansion, shrinkage, and uplift pressure tests on compacted soil-lime mixtures and can be used to determine the lime content required to achieve desired control of volume changes caused by increases or decreases of moisture. 1.2 The tests can be used to determine (1) the magnitude of volume changes under varying load conditions, (2) the rate of volume change, and (3) the magnitude of pressure change as moisture changes of the soil-lime mixture take place. The permeability of soil-lime mixture can also, if desired, be determined at the various load conditions. Note 1—Changes in field conditions can have major effects on the expansion and shrinkage characteristics of expansive soils. Therefore, to the greatest extent possible, initial and anticipated future field conditions should be duplicated, particularly with respect to moisture and density. 1.3 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D 6026 1.3.1 The method used to specify how data are collected, calculated, or recorded in this standard is not directly related to the accuracy to which the data can be applied in design or other uses, or both. How one applies the results obtained using this standard is beyond its scope. 1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.5 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 ====== From these tests the relative expansive potential of soil-lime mixtures containing varying amounts of lime can be evaluated. From such an evaluation, the amount of lime required to reduce expansion to acceptable levels can be determined. The data can then be used for the design and specification requirements for structural fill and subgrade fill where expansive soils are encountered and it is desired to give a certain degree of expansion-shrinkage control to structure foundations and road subgrades. The tests will also show if the specific soils are amenable to lime stabilization. Note 2—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 D 3740 are generally considered capable of competent and objective testing/sampling/inspection/and the like. Users of this standard are cautioned that compliance with Practice D 3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D 3740 provides a means of evaluating some of those factors.