GSO ASTM D2216:2022由GSO 发布于 2022-05-12。
GSO ASTM D2216:2022在国际标准分类中归属于: 93.020 土方工程、挖掘、地基构造、地下工程。
GSO ASTM D2216:2022 土壤和岩石质量水(水分)含量实验室测定的标准试验方法的最新版本是哪一版?
最新版本是 GSO ASTM D2216:2022 。
1.1 These test methods cover the laboratory determination of the water (moisture) content by mass of soil, rock, and similar materials where the reduction in mass by drying is due to loss of water except as noted in 1.4, 1.5, and 1.8. For simplicity, the word “material” shall refer to soil, rock or aggregate whichever is most applicable. 1.2 Some disciplines, such as soil science, need to determine water content on the basis of volume. Such determinations are beyond the scope of this test method. 1.3 The water content of a material is the ratio of the mass of water contained in the pore spaces of soil or rock material, to the solid mass of particles, expressed as a percentage. 1.4 The term “solid material” as used in geotechnical engineering is typically assumed to mean naturally occurring mineral particles of soil and rock that are not readily soluble in water. Therefore, the water content of materials containing extraneous matter (such as cement etc.) may require special treatment or a qualified definition of water content. In addition, some organic materials may be decomposed by oven drying at the standard drying temperature for this method (110 6 5°C). Materials containing gypsum (calcium sulfate dihydrate) or other compounds having significant amounts of hydrated water, may present a special problem as this material slowly dehydrates at the standard drying temperature (110 6 5°C) and at very low relative humidity, forming a compound (such as calcium sulfate hemihydrate) that is not normally present in natural materials except in some desert soils. In order to reduce the degree of dehydration of gypsum in those materials containing gypsum or to reduce decomposition in highly/ fibrous organic soils, it may be desirable to dry the materials at 60°C or in a desiccator at room temperature. When a drying temperature is used which is different from the standard drying temperature as defined by this test method, the resulting water content may be different from the standard water content determined at the standard drying temperature of 110 6 5°C.
土壤水的主要来源是降水和灌溉水,参与岩石圈-生物圈-大气圈-圈-水圈的水分大循环。而土壤中水分的多少直接影响着作物的生长情况,因为水作为溶剂溶解了土壤中的无机元素,而这些元素恰是植物自身无法得到的。因此,了解并测定土壤中水分含量,对我们来说是十分重要的。...
范围本标准规定了肥料和土壤调理剂真空烘箱法、烘箱法、卡尔·费休法测定水分(游离水)含量的试验方法,以及试验筛重量法测定固体肥料和土壤调理剂粒度、细度的试验方法。真空烘箱法适用于测定固体肥料和土壤调理剂水分含量;烘箱法适用于测定农林保水剂水分含量;卡尔·费休法适用于用二氧六环萃取后采用卡尔·费休试剂滴定测定肥料和土壤调理剂水分含量。...
土壤水分测定方法具体步骤如下:1、适用范围 本标准用于测定除石膏性土壤和有机土(含有机质20%以上的土壤)以外的各类土壤的水分含量。2、 测定原理 土壤样品在105±2℃烘至恒重时的失重,即为土壤样品所含水分的质量。...
广西壮族自治区质量技术监督局,关于土壤 有机汞的标准 DB45/T 939-2013 土壤、肥料、饲料、毛发中汞含量的测定 直接测汞仪法 行业标准-环保,关于土壤 有机汞的标准 HJ 680-2013 土壤和沉积物 汞、砷、硒、铋、锑的测定 微波消解/原子荧光法 美国材料与试验协会,关于土壤 有机汞的标准 ASTM D4404-2010 用汞侵入孔隙率测定法测定土壤和岩石的孔隙空间和孔隙空间分布的标准试验方法...
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