ASTM D3345-2017 Standard Test Method for Laboratory Evaluation of Solid Wood for Resistance to Termites《固体木材对白蚁耐性的实验室评价的标准试验方法》.pdf
《ASTM D3345-2017 Standard Test Method for Laboratory Evaluation of Solid Wood for Resistance to Termites《固体木材对白蚁耐性的实验室评价的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D3345-2017 Standard Test Method for Laboratory Evaluation of Solid Wood for Resistance to Termites《固体木材对白蚁耐性的实验室评价的标准试验方法》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D3345 17Standard Test Method forLaboratory Evaluation of Solid Wood for Resistance toTermites1This standard is issued under the fixed designation D3345; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the laboratory evaluation oftreated or untreated solid wood for its resistance to subterra-nean ter
3、mites. This test is considered as a screening test fortreated material and further evaluation by field methods isrequired.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
4、thesafety concerns, if any, associated with its use. 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. (WarningSee7.1.4.)2. Referenced Documents2.1 ASTM Standards:2D1413
5、Test Method for Wood Preservatives by LaboratorySoil-Block Cultures (Withdrawn 2016)32.2 Other Documents:4AWPA E10 Testing Wood Preservatives by Laboratory Soil-Block Cultures3. Choice or No-Choice Methodology3.1 There are two types of basic information that can beobtained from termite bioassays:3.1
6、.1 Choice test data-termites are presented with multiplefeeding targets and preferential mass loss indicates a materialpreference over an alternative food source.3.1.2 No-choice data-termites are presented with a singularchoice and mass loss indicates ability of the insect to consumethe material. In
7、 no-choice data, mortality data is needed todetermine dose mortality based on consumption of the testmaterial, which is often treated with suspected insecticidalcompounds.3.2 Both choice and no-choice tests shall be permitted whenevaluating materials for resistance to subterranean termites asthe dif
8、ferent tests address different behavioral responses of thetermites.4. Apparatus4.1 Containers, Glass or Clean Plastic, with loosely fittingtops with liners removed, 220 to 450 cm3(8 to 16 oz).4.1.1 If volatile chemicals are to be tested, a 4.8 mm (No. 12or approximately316 in.) hole is drilled in th
9、e center of the topand the appropriate solvent controls shall be included astreatments to identify possible solvent/carrier effects.4.2 Tray, enamel, stainless steel, or plastic, 0.25 m by 0.51m (10 by 20 in.) and bucket.4.3 Paper Towels.5. Reagents and Materials5.1 Benzalkonium Chloride Solution (1
10、+750)Add 1 partbenzalkonium chloride to 750 parts water. A comparablesurface antiseptic is satisfactory.5.2 Distilled Water.5.3 Sand, brown or white, screened, washed, and heat-sterilized.5.4 Southern Yellow Pine (SYP) (Pinus spp.) measuring 25.4mm (1.00 in.) square by 6.4 mm (0.25 in.) in the tange
11、ntialdirection. Sapwood, no visible defects, smoothed surfacesequivalent to planed or sanded, 2 to 3 rings/cm (4 to 6rings/in.). All test samples shall come from same parent board.5.4.1 Other wood species may be used, but in each separatetest using other species as the major test wood, five SYPsapwo
12、od blocks shall be used as additional controls to permitthe correlation of test results among laboratories.5.5 Subterranean TermitesUse a major common speciesof the region being studied.1This test method is under the jurisdiction of ASTM Committee D07 on Woodand is the direct responsibility of Subco
13、mmittee D07.06 on Treatments for WoodProducts.Current edition approved Jan. 1, 2017. Published March 2017. Originallyapproved in 1974. Last previous edition approved in 2008 as D3345 08. DOI:10.1520/D3345-17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Custome
14、r Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from the American Wood Protection Association (AWPA), PO B
15、ox361784, Birmingham, AL 35236-1784, http:/.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decisi
16、on on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.15.5.1 Specific identification of any termites used shall beobtained and reported with the test data.6. Determination of Sand
17、Water-Holding Capacity6.1 Determine the quantity of distilled water to be added tothe sand during the test as follows:6.1.1 Place 100 g of oven-dry sand in a beaker anddetermine the volume of water required to saturate the sand.The saturation point is defined as the point when the additionof more wa
18、ter will result in free water on the surface of thesand.6.1.2 Calculate the percent saturation as follows:% Saturation 5 weight of water/oven dry weight of sand! 3100 (1)6.1.3 Add water to the sand as follows:% water to add 5 saturation 2 7.0 (2)6.1.4 For example, the saturation point was reached at
19、 20mL of water:Saturation 5 20/100! 3100 5 20.0% (3)% Water to add 5 20.0 2 7.0 5 13.0%7. Collection of Termites7.1 Subterranean Termites, for example, (Reticulitermes,Coptotermes, spp.)Collect from an active, large colony (over50 000) in a natural forest situation, for example, from fallenlogs, stu
20、mps, and so forth, or from strong laboratory cultures.It is vital to the execution of this assay that healthy termites arecollected for use in the laboratory tests. Non-aggressivelyfeeding termite data can skew results and often lead toimproper conclusions. Careful attention shall be paid to un-trea
21、ted control data over the duration of each test and if massloss due to feeding is not in an acceptable range based on paststudies (1, 2) the test shall be repeated with a fresh collectionof termites.7.1.1 Remove short log sections to the laboratory and splitthem. Shake the insects out onto a tray or
22、 trays. Afterdistributing the debris and insects evenly on the tray(s), laydamp paper towels, sheets of kraft paper, and so forth, over thedebris. The termites will cling to the damp paper after a fewminutes.7.1.2 Prepare an 8 to 11-L (2 to 3-gal) pail by placing aboutten unfolded, slightly crumpled
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