翻译
1.scope
1.1 This test method covers the determinations of denisty, percent absorption, and percent voids in hardened concrete.
1.2 The text of this test method references notes and footnotes which provide explanatory information. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this standard.
1.3 The values stated in SI units are to be regarded as the standard.
1.范围
1.1这个测试方法包括密度的确定,吸水率,和硬化混凝土中的孔隙率。
1.2这个测试方法引用了一些提供解释信息的文本注释和脚注。这些注释和脚注(包括表和数据)，不应当视为本标准的要求。
1.3以国际单位值作为标准。
2. Significance and Use
2.1 This test method is useful in developing the data required for conversions between mass and volume for concrete. It can be used to determine conformance with specifications for concrete and to show differences from place to place within a mass of concrete.
3. Apparatus
3.1 Balance, sensitive to 0.025 % of the mass of the specimen.
3.2 Container, suitable for immersing the specimen and suitable wire for suspending the specimen in water.
2.意义和应用
2.1这个测试方法，在开发混凝土的质量和体积之间转换所需的数据方面是有帮助的。它可以
用来确定符合混凝土规范，它也可以显示一个混凝土内部各处质量的差异。
3.仪器
3.1样本质量精确到0.025%
3.2容器（适合浸泡样本和合适的水位标线）
4. Test Specimen
4.1 Whenever possible, the sample shall consist of several individual portions of concrete, each to be tested separately. The individual portions may be pieces of cylinders, cores, or beams of any desired shape or size, except that the volume of each portion shall be not less than 350 cm3 (or for normal weight concrete, approximately 800 g) and each portion shall be free from observable cracks, fissures, or shattered edges.
4.样本测试
4.1样品尽可能由混凝土的几个独立的部分组成,每个部分单独进行测试。各部分可能是任何
所需形状或大小的一块柱面,核心,或者束, 每个部分的体积不得少于350cm3(或正常重量的混凝土,大约是800 g)，并且每个部分从可观察到的裂缝、裂缝或破碎的边缘都应当是自由。
5. Procedure
5.1 Oven-Dry Mass—Determine the mass of the portions, and dry in an oven at a temperature of 100 to 110 °C for not less than 24 h. After removing each specimen from the oven, allow it to cool in dry air (preferably in a desiccator) to atemperature of 20 to 25 °C and determine the mass. If the specimen was comparatively dry when its mass was first determined, and the second mass closely agrees with the first, consider it dry. If the specimen was wet when its mass was first determined, place it in the oven for a second drying treatment of 24h and again determine the mass. If the third value checks the second, consider the specimen dry. In case of any doubt, redry the specimen for 24h periods until check values of mass are obtained. If the difference between values obtained from two successive values of mass exceeds 0.5 % of the lesser value, return the specimens to the oven for an additional 24-h drying period, and repeat the procedure until t
values翻译he difference between any two successive values is less than 0.5 % of the lowest value obtained. Designate this last value A.
5.步骤
5.1烘干质量——确定其质量，再将其放置在100—110°C的烘箱温度下干燥，且不少于24小时。从烘箱移出每个标本后,让它们在干燥的空气冷却(最好放在干燥器里)，控制温度在20到25°C之间，然后确定质量。如果样品在第一次测定质量时比较干燥的话,并且第二次测定的数据非常接近第一次的数据，那么我们认为样品是干燥的。如果样品在第一次测定质量时是潮湿的话，则将它放在烤箱里进行第二次干燥处理，时间为24小时，再确定质量。如果第三次测定值核对上第二次的数值，那么我们认为样品干燥。如有疑问，再将样本干燥24小时，直到获得核对的数值。如果连续测得的两个值中，它们相差超过较小值的0.5%，那么把样本放回烘箱，额外进行一次干燥处理，时间为24h，并且重复这个过程，直到连续两个测定值之间的差别小于最小值的0.5%时为止，然后选取最后一个测值，定为A。
5.2 Saturated Mass After Immersion—Immerse the specimen, after final drying, cooling, and determination of mass, in water at approximately 21°C for not less than 48h and until t
wo successive values of mass of the surface-dried sample at intervals of 24h show an increase in mass of less than 0.5% of the larger value. Surface-dry the specimen by removing surface moisture with a towel, and determine the mass. Designate the final surface-dry mass after immersion B.
5.2浸泡后饱和质量——干燥、冷却试块后确定其质量，再将其浸泡在约21°C的水中，不少于48小时，每隔24小时连续测得表面干燥试样两个质量数值，直到数值显示质量的增加小于较大值的0.5%为止。用毛巾擦拭表面水分使其表面干燥，并确定其质量。选取浸泡后测得表面干燥试样的最终质量，定为B。
5.3 Saturated Mass After Boiling—Place the specimen, processed as described in 5.2, in a suitable receptacle, covered with tap water, and boil for 5 h. Allow it to cool by natural loss of heat for not less than 14 h to a final temperature of 20 to 25°C. Remove the surface moisture with a towel and determine the mass of the specimen. Designate the soaked, boiled, surface-dried mass C.
5.3沸腾后饱和质量——将按上述5.2处理后的样本试块，放置在一个合适的容器里，用自来
水将其淹盖，然后煮5 h。再让它通过自然热损失进行冷却，时间不少于14 h，直到最终温度为20到25°C之间。然后用毛巾除去表面的水分并确定样品的质量。选取浸湿和煮沸后测得的表面干燥试样的质量，定为C。
5.4 Immersed Apparent Mass—Suspend the specimen, after immersion and boiling，by a wire and determine the apparent mass in water. Designate this apparent mass D.

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