1.1本试验方法可用于使用砂锥仪测定土壤的就地密度和单位重量。 1.2本试验方法适用于岩石或粗材料含量不超过1 1/2英寸的土壤。直径（38 mm）。 1.3本试验方法也可用于测定完好或未受损混凝土的就地密度和单位重量 现场 土壤，前提是土壤中的天然孔隙或孔隙足够小，以防止试验中使用的砂进入孔隙。被测试的土壤或其他材料应具有足够的粘性或颗粒吸引力，以保持小孔或开挖处的稳定侧面，并足够坚固，以承受在开挖孔和将仪器放置在其上时施加的较小压力，而不会变形或脱落。 1.4本试验方法不适用于在试验孔开挖过程中会变形或压缩的有机、饱和或高塑性土壤。 本试验方法可能不适用于由未结合颗粒材料组成的土壤，这些材料无法在试验孔中保持稳定的侧面，土壤中含有大量大于11/2英寸的粗材料。（38 mm）和具有高孔隙比的粒状土壤。 1.5当待测试材料含有大量大于11/2英寸的颗粒时。（38 mm），或当测试孔体积大于0.1 ft时 3. （2830厘米 3. )如果需要，则试验方法D 4914或D 5030适用。 1.6工程专业的常见做法是同时使用磅来表示质量单位（lbm）和力单位（lbf）。这隐含地结合了两个独立的单位系统，即绝对系统和引力系统。在一个标准中结合使用两套独立的英寸-磅单位在科学上是不可取的。 本试验方法是在处理英寸-磅系统时使用单位重力系统编写的。在该系统中，磅（lbf）表示力（重量）的单位。然而，使用天平或天平记录质量磅（lbm），或记录密度（lbm/ft） 3. 不应视为不符合本试验方法。 1.7除非被本标准取代，否则所有观察值和计算值应符合实施规程D 6026中规定的有效数字和舍入准则。 1.7.1本标准中用于规定如何收集、记录或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。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因素； 通常的做法是增加或减少有效数字或报告的数据，以与这些考虑因素相称。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。

1.1 This test method may be used to determine the in-place density and unit weight of soils using a sand cone apparatus. 1.2 This test method is applicable for soils without appreciable amounts of rock or coarse materials in excess of 1 1/2 in. (38 mm) in diameter. 1.3 This test method may also be used for the determination of the in-place density and unit weight of intact or in situ soils, provided the natural void or pore openings in the soil are small enough to prevent the sand used in the test from entering the voids. The soil or other material being tested should have sufficient cohesion or particle attraction to maintain stable sides on a small hole or excavation, and be firm enough to withstand the minor pressures exerted in digging the hole and placing the apparatus over it, without deforming or sloughing. 1.4 This test method is not suitable for organic, saturated, or highly plastic soils that would deform or compress during the excavation of the test hole. This test method may not be suitable for soils consisting of unbound granular materials that will not maintain stable sides in the test hole, soils containing appreciable amounts of coarse material larger than 11/2 in. (38 mm), and granular soils having high void ratios. 1.5 When materials to be tested contain appreciable amounts of particles larger than 11/2 in. (38 mm), or when test hole volumes larger than 0.1 ft 3 (2830 cm 3 ) are required, Test Method D 4914 or D 5030 are applicable. 1.6 It is common practice in the engineering profession to concurrently use pounds to represent both a unit of mass (lbm) and a unit of force (lbf). This implicitly combines two separate systems of units, that is, the absolute system and the gravitational system. It is scientifically undesirable to combine the use of two separate sets of inch-pound units within a single standard. This test method has been written using the gravitational system of units when dealing with the inch-pound system. In this system the pound (lbf) represents a unit of force (weight). However, the use of balances or scales recording pounds of mass (lbm), or the recording of density in lbm/ft 3 should not be regarded as nonconformance with this test method. 1.7 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D 6026 unless superseded by this standard. 1.7.1 The procedures used to specify how data are collected, recorded or calculated in this standard are regarded as the industry standard. In addition they are representative of the significant digits that generally should be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the users objectives; it is common practice to increase or reduce significant digits or reported data to be commensurate with these considerations. It is beyond the scope of this standard to consider significant digits used in analytical 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 and health practices and determine the applicability of regulatory limitations prior to use.