1、Designation: D 1864 89 (Reapproved 2002)Standard Test Method forMoisture in Mineral Aggregate Used on Built-Up Roofs1This standard is issued under the fixed designation D 1864; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the ye
2、ar of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This test method covers the de
3、termination of moisturein mineral aggregate for use on built-up roofs.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use.
4、 It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:D 75 Practice for Sampling Aggregates2D 1863 Specification for Mineral Aggrega
5、te Used onBuilt-up Roofs33. Summary of Test Method3.1 The aggregate is dried to constant mass in a 110C(230F) oven. The mass percent moisture is calculated as theloss in mass based on the mass of the oven dry aggregate.4. Significance and Use4.1 This test method measures the moisture in mineralaggre
6、gate required by Specification D 1863.5. Apparatus5.1 Balance, 1000-g (2.2-lb) capacity, sensitive to 0.01 % ofthe capacity.5.2 Oven, large enough to hold the sample and capable ofmaintaining a temperature of 110C (230F) 6 1%.5.3 Sample Container, consisting of an evaporating dish orsimilar shallow
7、container.6. Sampling6.1 Sample aggregates received in bulk in accordance withPractice D 75.6.2 For aggregates received in bags or small containers,select a number of bags or small containers at random,equivalent to the cube root of the total number in the shipment.7. Procedure7.1 Transfer to a tare
8、d dish 500 g (1 lb) 6 1 % of theaggregate, weighed to the nearest 2 3 0.1 g (104-lb). Place inan oven at 110C (230F) for 4 h. Cool in a desiccator. Weighto the nearest 2 3 0.1 g (104-lb). Repeat the drying for 1-hperiods until constant mass is obtained.8. Calculation8.1 Calculate the percentage of m
9、oisture as follows:Moisture, % 5 B 2 C!/C 2 A!# 3 100 (1)where:A = mass of container,B = original mass of sample and container, andC = mass of sample and container after drying.9. Precision and Bias9.1 The following data should be used for judging theacceptability of results (95 % probability) on sa
10、mples from thesame lot from the same supplier:9.1.1 RepeatabilityDuplicate results by the same operatorshould not be considered suspect unless they differ by morethan the following amount:Moisture Content, % Repeatability, percentage points0to5 60.59.1.2 ReproducibilityThe results submitted by each
11、oftwo laboratories should not be considered suspect unless theydiffer by more than the following amount:Moisture Content, % Reproducibility, percentage points0to5 61.09.2 BiasThere is no bias known in this test method.10. Keywords10.1 built-up roofs; mineral aggregate; moisture1This test method is u
12、nder the jurisdiction of ASTM Committee D08 on Roofingand Waterproofing and is the direct responsibility of Subcommittee D08.03 onSurfacing and Bituminous Materials for Membrane Waterproofing and Built-upRoofing.Current edition approved Nov. 24, 1989. Published January 1990. Originallypublished as D
13、 1864 76 (1980). Last previous edition D 1864 81(1988).2Annual Book of ASTM Standards, Vol 04.03.3Annual Book of ASTM Standards, Vol 04.04.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ASTM International takes no position respectin
14、g the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standa
15、rd is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM Internationa
16、l Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.Th
17、is standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 1864 89 (2002)2
