ASTM D4972-2018 Standard Test Methods for pH of Soils.pdf
《ASTM D4972-2018 Standard Test Methods for pH of Soils.pdf》由会员分享,可在线阅读,更多相关《ASTM D4972-2018 Standard Test Methods for pH of Soils.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D4972 13D4972 18Standard Test MethodMethods forpH of Soils1This standard is issued under the fixed designation D4972; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses i
2、ndicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 ThisThese test method coversmethods cover the measurement of the pH of soils for uses other than for corrosion testing.that will pass the 2.00 mm (No. 10) si
3、eve. Such measurements are used in the agricultural, environmental, geotechnical, and naturalresources fields. This measurement determines the degree of acidity or alkalinity in soil materials suspended in water and a 0.01M calcium chloride solution. Measurements in both liquids are necessary to ful
4、ly define the soils pH. This variable is useful indetermining the solubility of soil minerals and the mobility of ions in the soil and assessing the viability of the soil-plantenvironment. A more detailed discussion of the usefulness of this parameter is not warranted here; however, it can be found
5、inmany discussions of the subject. A few such discussions are given asgiven in Refs (1-6)2 at the end of the text1.2 Two methods for measuring the pH of soils are provided. The method to be used shall be specified by the requestingauthority. When no method is specified, MethodAshall be used. The pH
6、is determined in test water and a calcium chloride solutionfor both methods.1.2.1 Method AThe pH is measured using a potentiometer having a pH sensitive electrode system. This method can be usedfor any application and must be used when the application warrants a higher level of resolution.1.2.2 Meth
7、od BThe pH is measured using pH sensitive paper. This method can be used for any application, however, becausepaper typically has a lower resolution, it provides an approximate estimate of the pH of the soil and should not be used when theapplication requires a higher level of resolution (Note 1).NO
8、TE 1For example, paper with a sensitivity to the nearest 1 pH unit placed into a buffer solution of 4 should indicate a pH of 4, however, it wouldnot indicate if the pH is 4.449 or 3.449.1.3 UnitsThe values stated in SI units are to be regarded as standard. No other units of measurement are included
9、 in thisstandard.1.4 All measured and calculated values shall conform to the guidelines for significant digits and rounding established in PracticeD6026.1.4.1 The procedures used to specify how data are collected/recorded and calculated in the standard are regarded as the industrystandard. In additi
10、on, they are representative of the significant digits that generally should be retained. The procedures used do notconsider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the users objectives;and it is common practice to increase or reduce sign
11、ificant digits of reported data to be commensurate with these considerations.It is beyond the scope of these test methods to consider significant digits used in analysis methods for engineering data.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its
12、 use. It is the responsibilityof the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine theapplicability of regulatory limitations prior to use.1.6 This international standard was developed in accordance with internationally recogniz
13、ed principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3C670 Practice for Preparin
14、g Precision and Bias Statements for Test Methods for Construction Materials1 ThisThese test method ismethods are under the jurisdiction of ASTM Committee D18 on Soil and Rock and is the direct responsibility of Subcommittee D18.22 on Soilas a Medium Media for Plant Growth.Current edition approved No
15、v. 1, 2013July 1, 2018. Published November 2013July 2018. Originally approved in 1989. Last previous edition approved in 20072013 asD4972 01 (2007).D4972 13. DOI: 10.1520/D4972-13.10.1520/D4972-18.2 The boldface numbers in parentheses refer to a list of references at the end of this standard.3 For r
16、eferencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provid
17、e the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the st
18、andard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1D653 Terminology Relating to Soil, Rock, and Contai
19、ned FluidsD1193 Specification for Reagent WaterD2487 Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System)D2488 Practice for Description and Identification of Soils (Visual-Manual Procedures)D3740 Practice for Minimum Requirements for Agencies Engaged in
20、Testing and/or Inspection of Soil and Rock as Used inEngineering Design and ConstructionD4220/D4220M Practices for Preserving and Transporting Soil SamplesD4753 Guide for Evaluating, Selecting, and Specifying Balances and Standard Masses for Use in Soil, Rock, and ConstructionMaterials TestingD6026
21、Practice for Using Significant Digits in Geotechnical DataD6913 Test Methods for Particle-Size Distribution (Gradation) of Soils Using Sieve AnalysisG51 Test Method for Measuring pH of Soil for Use in Corrosion Testing3. Terminology3.1 Definitions:3.1.1 For common definitions of common technical ter
22、ms used in this standard, refer to Terminology D653.4. Summary of Test Method4.1 Measurement of This test method is used to determine the pH of soils in both suspensions of water and a calcium chloridesolution are made with either a potentiometer using a pH sensitive electrode system (Method A), or
23、pH sensitive paper (MethodB). The potentiometer is calibrated with buffer solutions of known pH. The pH sensitive paper is a less accurate measurement andshould only be used for a rough estimate of the soil pH. The electrode must be used for this measurement unless the pH sensitivepaper is specified
24、.a soil. Two similar test specimens are obtained from a representative sample that has been air-dried and screenedover a 2.00 mm (No. 10) sieve. From the material passing the 2.00 mm (No. 10) sieve, one specimen is mixed with test water andone is mixed with a calcium chloride solution. They are then
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMD49722018STANDARDTESTMETHODSFORPHOFSOILSPDF

链接地址:http://www.mydoc123.com/p-518559.html