1.1本试验方法包括测定膨胀水泥砂浆的长度变化，当受到约束时，由于水泥水化产生的内力的发展。 1.2以非国际单位制表示的数值应视为标准。当英寸磅单位和国际单位都存在时，非国际单位将被视为标准。以国际单位制为单位的数值是近似值，仅供参考，可能会提供与英寸-磅单位不同的数值。 1.3本标准无意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。（警告:新鲜水硬性水泥混合物具有腐蚀性，长时间接触可能会导致皮肤和组织灼伤。）

1.1 This test method covers the determination of length changes of expansive cement mortar, while under restraint, due to the development of internal forces resulting from hydration of the cement. 1.2 The values stated in non-SI units are to be regarded as the standard. When both the inch-pound units and the SI units are present, the non-SI units are to be regarded as the standard. The values in SI units are approximate, are listed for information only, and will likely provide different values than the inch-pound units. 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. (Warning-Fresh hydraulic cement mixtures are caustic and may cause burns to skin and tissue upon prolonged exposure.)