ASTM D5744-13e1
采用湿度室的固体材料实验室老化的标准试验方法
Standard Test Method for Laboratory Weathering of Solid Materials Using a Humidity Cell
ASTM D5744-13e1 发布历史
ASTM D5744-13e1由美国材料与试验协会 US-ASTM 发布于 2013。
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ASTM D5744-13e1 发布之时，引用了标准
- ASTM D1067 水的酸度或强碱性的标准测试方法
- ASTM D1125 水的电导性和电阻率的标准试验方法
- ASTM D1193 试剂水(联邦试验方法No.7916)
- ASTM D1293 水pH值的标准测试方法
- ASTM D1498 水的氧化还原电势标准实施规程
- ASTM D2234/D2234M 煤的总样品采集的标准实施规程
- ASTM D276 识别纺织品中纤维的标准试验方法
- ASTM D3370 封闭管道取水的标准做法
- ASTM D420 工程、设计和施工用工地表征的标准指南
- ASTM D653 采用流动空气测量未饱和多孔材料渗透性的标准试验方法
- ASTM D737 纺织纤维透气率的试验方法
- ASTM D75 集料的抽样
- ASTM E1915 用燃烧红外吸收光谱法分析含金属矿和有关材料的标准试验方法
- ASTM E2242 用大气水迁移率法对矿山岩石进行柱渗滤提取的标准试验方法
- ASTM E276 4号（4.75毫米）颗粒尺寸或屏幕分析的标准测试方法金属轴承和相关材料的筛网和精密
- ASTM E691 为测定试验方法精密度开展的实验室间的研究
- ASTM E877 测定化学成分和物理性质用铁矿石和相关材料的取样和样品制备的标准实施规程
ASTM D5744-13e1的历代版本如下：
- 2018年 ASTM D5744-18 用湿度计测定固体材料实验室风化的标准试验方法
- 2013年 ASTM D5744-13e1 采用湿度室的固体材料实验室老化的标准试验方法
- 2013年 ASTM D5744-13 采用湿度室的固体材料实验室老化的标准试验方法
- 2012年 ASTM D5744-12 使用湿度室测试固体材料实验室风化的标准试验方法
- 2007年 ASTM D5744-07e1 使用湿度室测试固体材料老化标准试验方法
- 2007年 ASTM D5744-07 湿度指示器测定固体材料的实验室风化用标准试验方法
- 1996年 ASTM D5744-96(2001) 用改良湿度室测试固体材料加速风化的标准试验方法
- 2001年 ASTM D5744-96 用改良湿度计测定固体材料加速风化的标准试验方法
5.1 The laboratory weathering procedure will generate data that can be used to: (1) determine whether a solid material will produce an acidic, alkaline, or neutral effluent, (2) identify solutes in the effluent that represent dissolved weathering products formed during a specified period of time, (3) determine the mass of solute release, and (4) determine the rate at which solutes are released (from the solids into the effluent) under the closely controlled conditions of the test.
5.2 Data generated by the laboratory weathering procedure can be used to address the following objectives: (1) determine the variation of drainage quality as a function of compositional variations (for example, iron sulfide and calcium+magnesium carbonate contents) within individual mine-rock lithologies, (2) determine the amount of acid that can be neutralized by the sample while maintaining drainage pH ≥ 6.0 under the conditions of the test, (3) estimate mine-rock weathering rates to aid in predicting the environmental behavior of mine rock, and (4) determine mine-rock weathering rates to aid in experimental design of site-specific kinetic tests.
5.3 The laboratory-weathering procedure provides conditions conducive to oxidation of solid material constituents and enhances the transport of weathering reaction products contained in the resulting weekly effluent. This is accomplished by controlling the exposure of the solid material sample to such environmental parameters as reaction environment temperature and application rate of water and oxygen.
5.4 Because efficient removal of reaction products is vital to track mineral dissolution rates during the procedure, laboratory leach volumes are large per unit mass of rock to promote the rinsing of weathering-reaction products from the mine-rock sample. A comparison of laboratory kinetic tests with field tests has shown that more reaction products from mineral dissolution are consistently released per unit weight and unit time in laboratory weathering tests (9). For example, sulfate release rates observed in laboratory tests of metal-mine rock have been reported to be 3 to 8 times those for small-scale field test piles of Duluth Complex rock (10), and from 2 to 20 times those for small-scale field test piles of Archean greenstone rock (11). A greater increase is anticipated when laboratory rates are compared with field rates measured from operational waste-rock piles.
5.5 Fundamental assumptions governing Options A and B of the procedure:
5.5.1 Option A—An excess amount of air pumped up through the sample during the dry- and wet-air portions of the weekly cycle reduces the potential for oxidation reaction rates being limited by low-oxygen concentrations. Weekly leaches with low ionic strength water promote the removal of leachable mineral dissolution products produced from the previous week's weathering cycle. The purpose of the three-day dry-air portion of the weekly cycle is t......
- 标准号
- ASTM D5744-13e1
- 发布
- 2013年
- 发布单位
- 美国材料与试验协会
- 替代标准
- ASTM D5744-18
- 当前最新
- ASTM D5744-18
- 引用标准
- ASTM D1067 ASTM D1125 ASTM D1193 ASTM D1293 ASTM D1498 ASTM D2234/D2234M ASTM D276 ASTM D3370 ASTM D420 ASTM D653 ASTM D737 ASTM D75 ASTM E1915 ASTM E2242 ASTM E276 ASTM E691 ASTM E877