1、Designation: C1374 14C1374 18Standard Test Method forDetermination of Installed Thickness of PneumaticallyApplied Loose-Fill Building Insulation1This standard is issued under the fixed designation C1374; the number immediately following the designation indicates the year oforiginal adoption or, in t
2、he case of revision, the year of last 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 determination of the installed thickness of pneumatically app
3、lied loose-fill building insulations priorto settling by simulating an open attic with horizontal blown applications.1.2 This test method is a laboratory procedure for use by manufacturers of loose-fill insulation for product design, labeldevelopment, and quality control testing. The apparatus used
4、produces installed thickness results at a given mass/unit area.1.3 This test method is not the same as the design density procedures described in Test Methods C520 or Specifications C739or C764.1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses
5、are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safe
6、ty 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 recognized principles on standardizationestablished in the Decision on Principles for the Develo
7、pment of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C168 Terminology Relating to Thermal InsulationC520 Test Methods for Density of Granular Loose Fill InsulationsC73
8、9 Specification for Cellulosic Fiber Loose-Fill Thermal InsulationC764 Specification for Mineral Fiber Loose-Fill Thermal InsulationE691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method3. Terminology3.1 DefinitionsUnless otherwise stated, the definitions l
9、isted in Terminology C168 are applicable herein.3.2 Definitions of Terms Specific to This Standard:3.2.1 installed thickness, nthe average thickness, as measured immediately after application of blown insulation materialwhen applied at a given mass/unit area.4. Summary of Test Method4.1 Astandardize
10、d test chamber of 80 ft2 (7.4 m2) is used as a receptacle to receive a calculated mass/unit area of pneumaticallyapplied insulation.4.2 The mass of insulation to be blown into the test chamber is calculated from the bag label information.1 This test method is under the jurisdiction of ASTM Committee
11、 C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.32 on MechanicalProperties.Current edition approved April 15, 2014Sept. 1, 2018. Published May 2014September 2018. Originally approved in 1997. Last previous edition approved in 20092014as C137403(2009).C1374 14. DOI: 10
12、.1520/C1374-14. 10.1520/C1374-18.2 For referencedASTM 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
13、 standard and is intended only to provide 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
14、 cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.3 The mass of insulation prescribed in 4.2 is uniformly blown into the tes
15、t chamber.4.4 The thickness of the blown insulation is determined at 13 predetermined locations.4.5 The thickness average of three tests is the installed thickness for the mass/unit area being tested.5. Significance and Use5.1 This test method was designed to give the manufacturer of loose-fill insu
16、lation products a way of determining what theinitial installed thickness should be in a horizontal open attic for pneumatic applications.5.2 The installed thickness value developed by this test method is intended to provide guidance to the installer in order toachieve a minimum mass/unit area for a
17、given R-value.5.3 For the purpose of product design, testing should be done at a variety of R-values. At least three R-values should be used:the lowest R-value on the product label, the highest R-value on the product label, and an R-value near the midpoint of the R-valuerange.NOTE 1For quality contr
18、ol purposes, testing may be done at one R-value of R-19 (hft2F/Btu) or higher.5.4 Specimens are blown in a manner consistent with the intended installation procedure. Blowing machine settings should berepresentative of those typically used for field application with that machine.5.5 The material blo
19、wn for a given R-value as part of the installed thickness test equals the installed mass/unit area times thetest chamber area. This mass can be calculated from information provided on the package label at the R-value prescribed.6. Apparatus6.1 Blowing MachineA pneumatic blowing machine, designed pri
20、marily for handling loose-fill insulation materials, shall beused for blowing the insulation into the test chamber. This machine shall have throughput and material handling characteristicssimilar to that used in field applications.6.2 Blowing HoseThe machine should utilize 150 ft (46 m) of 3in. (76m
21、m) diameter flexible, corrugated blowing hose. Atleast 100 ft (30 m) of the hose should be elevated between 10 and 20 ft (3 and 6 m) above the blowing machine to simulate a typicalinstallation configuration. The hose should have no more than eight 90 bends and no bends may be less than 4ft (1.2m) ra
22、dius.NOTE 2It is good practice to clean the hose periodically by mechanically agitating it with the blower on. This practice should dislodge any piecesof insulation that might be caught in the hose.6.3 Test Specimen ChamberThe specimen chamber shall be constructed in accordance with Fig. 1 with the
23、reference dowelspositioned as shown in Fig. 2.NOTE 3For some insulation materials it may be necessary to use a larger test chamber than shown to accommodate a more representative sample,when the test chamber size is changed, the precision may change.6.4 Weighing DevicesA device is required to weigh
24、the test material before loading into hopper. This device must determinethe test material mass to within 0.5 %.6.4.1 As an alternative mount the blowing chamber on load cells capable of determining the mass to within 0.5%.0.5 %.FIG. 1 Installed Thickness Test ChamberC1374 1826.5 Specimen Preparation
25、 RoomAn enclosed area where the test material is blown into the specimen chamber is required toprotect the blowing operation from wind or strong air currents. Room geometry should not influence the blowing stream from thehose as long as there is adequate clearance around the sides to maneuver.7. Sam
26、pling7.1 Follow sampling plans given in the material specifications, regulations or other appropriate documents when applicable. Inthe absence of such directions, randomly select the number of bags of product required for testing to meet conditions in 8.2.7.2 Condition the sample material by exposur
27、e in a conditioned space as prescribed by the contract or regulatory documents.If conditioning is not required, material must be in equilibrium with the storage environment.8. Specimen Preparation8.1 Clean the specimen chamber to be free of dirt and insulation prior to the start of the test.NOTE 4Ma
28、ny factors can influence the installation characteristics of blown insulation. These include blowing rate, machine adjustments, the size andlength of the hose, and the angle and dimensions of the hose outlet in relation to the test chamber. Where available, use manufacturers instructions toestablish
29、 machine settings.8.2 From product label information, calculate the mass of insulation required to fill the test chamber for the R-value selectedusing the following formula:W5A3WSF (1)where:W = total mass of material required lb (kg),A = test chamber area, 80 ft2 (7.4 m2), andWSF = label mass/unit a
30、rea lb/ft2 (kg/m2).FIG. 2 Dowel Placement in Chamber FloorC1374 183where:W = total mass of material required lb (kg),A = test chamber area, 80 ft2 (7.4 m2), andWSF = label mass/unit area lb/ft2 (kg/m2).8.3 Assemble the blowing machine, hose, and hose length combinations as appropriate for the materi
31、al being prepared (seerecommendations in Section 6).8.4 Set the blowing machine adjustments and select the feed rates in accordance with the insulation manufacturersrecommendations. If the insulation manufacturer does not provide this information, consult the machine manufacturer forrecommended sett
32、ings. It is important that settings are representatinve of those typically used in field application with this machine.8.5 Place the weighed specimen into the empty blowing machine before starting the machine. If the hopper is not large enough,fill it to capacity and have an assistant feed the remai
33、nder of insulation into the hopper as the test is progressing.8.5.1 When using a test chamber equipped with load cells, the blown weight will be determined by the load cells. Pre-weighingthe specimen is not required.NOTE 5If residual material is left in the machine, which cannot be blown out, then b
34、efore testing the specimen material, fill machine with someinsulation and blow out as much as the machine will allow. Leave the remaining amount in the machine after each trial.9. Test Procedure9.1 Blow the mass of insulation determined in 8.2 as evenly as possible by moving the hose around outside
35、edge of test chamber.It is helpful to attach attic rulers to the inside wall of test chamber.9.1.1 When using load cells, blow the material until the total mass calculated is achieved.9.2 Return any insulation which falls outside the test chamber to the blowing machine until all material is installe
36、d within thetest chamber.9.3 Remove any material clinging to each dowel and measure the thickness of insulation to the nearest 0.25 in. (6 mm). It ishelpful to slide a disc, made of approximately 5in. (127mm) diameter filter paper with a center hole 0.125 in. (3 mm) larger thanthe dowel diameter, do
37、wn each dowel until contact is made with the insulation and the disc is as level as possible withoutcompressing the insulation surface (see Fig. 3). Repeat this procedure for three trials.10. Calculation10.1 Calculation of Installed Thickness:10.1.1 Total the measurements described in 9.3 and divide
38、 by the number of dowels:FIG. 3 Dowel MarkingsC1374 184T5(n51N tnN (2)where:T = installed thickness for each trial (in.),t = installed thickness at each dowel (in.), andN = total number of dowels.10.1.2 Add the installed thickness from each trial and divide by three. This number will be the installe
39、d thickness for thatR-values mass/unit area.TI 5T11T21T33 (3)where:TI = installed thickness (in.).11. Report11.1 Report the following information, including references to applicable specifications and test method:11.1.1 The name, address, and other identification of the test laboratory and the date
40、of the report.11.1.2 The name and other identification of the material or product tested and the date of the test.11.1.3 The source of the material or product, the date obtained, method of sampling and the manufacture date, if available.11.1.4 The method and details of the specimen preparation, incl
41、uding blowing machine and machine settings used.11.1.5 The method and conditions of specimen conditioning if any.11.1.6 The installed thickness and the mass/unit area used.11.1.7 Any other pertinent observations or remarks.12. Precision and Bias12.1 PrecisionThe test results for representation of th
42、e performance of the material or product will depend not only on thecharacteristics of the test but also on the variability of the material or product and its sampling and specimen preparation.12.1.1 Table 1 shows an estimate of precision based on an interlaboratory test conducted in 1992. Seven lab
43、oratories contributeddata with full results secured from five laboratories on a commercially available cellulose insulation material from one productionbatch. Triplicate specimens of three weights of insulation corresponding to R-11, 22, and 30 (hft2F/Btu) were evaluated usingthis procedure (with th
44、e exception of ten instead of thirteen dowel rods).312.1.2 Table 2 shows an estimate of precision based on another interlaboratory test conducted in 1996. Four laboratoriescontributed data with full results from three laboratories using fiberglass insulation from one production batch. Duplicatespeci
45、mens of two different products were evaluated. Unlike the previous round-robin which targeted specific weights/ft2, thecontents of each package was installed resulting in slightly different weights/ft2, as shown in Table 3. This has the effect ofproducing higher or lower percentages of repeatability
46、 and reproducibility.412.1.3 Additional interlaboratory data are being obtained and will be added to future revisions.NOTE 6Test results were evaluated using Practice E691. Repeatability and reproducibility are herein defined as 2.8 times the corresponding standarddeviation to obtain a 95% confidenc
47、e level. Repeatability is the variability between test results within each laboratory, and reproducibility is the variabilitybetween test results from different laboratories.NOTE 6Test results were evaluated using Practice E691. Repeatability and reproducibility are herein defined as 2.8 times the c
48、orresponding standarddeviation to obtain a 95% confidence level. Repeatability is the variability between test results within each laboratory, and reproducibility is the variabilitybetween test results from different laboratories.12.2 BiasNo statement of bias can be made for this test method since t
49、here is no standard reference material.3 Supporting data have been filed at ASTM International Headquarters and may be obtained by requesting Research Report RR:C16-1022.4 Supporting data have been filed at ASTM International Headquarters and may be obtained by requesting Research Report RR:C16-1023.TABLE 1 Precision for Cellulose InsulationThree Specimens/FiveLaboratories Repeatability ReproducibilityR-Value(hft2F/Btu)MeanThickness(in.)r % of Mean R % of Mean11 4.21 0.4447 10.6 0.5808 13.822 7.31 1.1333 15.5 1.6572 22.730 9.47 0.7266 7.7 1.
