Document 8qwgqVyLqz8M3Xn7RQYaNa5a

hr U.S. ARMY MnancxtwH J3<- No. 81-7A DECEMBER S7 CT>3 aUPMMBMWg HO. -n~ Imff X*> in4 MATERIALS, SURFACING, FOR BUILT-UP BITUMINOUS ROOFING * CaWKKAL SPECOTCAtlONS There are no general ipeclfications applicable to this specification. vu Tins Swfaetng nn>t^ii for bituminous boat-op- roofing. stall be ot-&ms following typea; and tfcef'typ* derirttdTMMU bfrsoitdPte teritM*ai* * tot feds; TyP Tu Roofing Gravel. TypeH. Roofing Sag. .. Bbunuu Material shall be as verified under Detail Requirement*. section V hereof. IV. CBNOAI. aWJBinSlfSNTS TC'Se-*- -There-'are no general requirements'applicable ttf this specification. v. dstau. moiinmi 1. Type!. Roofing Gravel.--Shall be hard, durable, wnterworn, dry. and free from clay, loam, sand, and other foreign substances; It shall preferably tie within the following limitswith-respect farsi**fc. - BetMfe# - Passing a %-lnch tints.-- v. --v, . Wf =:- Passing a %-ln<* stem add retained ,,o ,u ^ sieve, not less than:---- s--:----- :---------- 8If. - \\. 1 Retained on a %-lhch ateve ----- ------- 109 - - 2. Type IT. Hoofing *--SMB Mr'crtoitiiC: hard;, blakt-farilitri^"" slag, dry, and free from sand dO*; di*'fiJ-ot* fOiMga ntotmtm It shall preferably be within the trttnrtag Units with- reepset5'*#1--' BM* , ii*l-lV--Ug' Roaring a M-Inch ---------- 100 Passing a %-inefc stem and retained on a 34-Inch sieve, not less than--------- -------------------.... 90 Retafimd on a 34-lneb sieve---------------------------------- 100 vi. XRS0D6 or BAxruate Aim ntnnrd. 1. Roofing gravel and dag shall be sampled by the methods give* In AJ3.T.M. Standard* 1080, part II, p. 621, " SaatpUng Stone, aug. Gravel, Sand and Stone Block for use as Highway Materials'*, D-75-22, wMrit are eaaeattally as fiaPewa; \ PLAINTIFF'S EXHIBIT BIRD 006254 2 a. Samples of tie materials shall be taken from the bins or storsge piles of the screening or washing plant, preferably while the material is being loaded from these supplies. Samples shall be taken from different parts of the stock pile, care being taken to avoid sampling a segregated area of coarse-grained material which is likely to exist at the base of the pile. In sampling from a bin, separate samples shall be taken from the top of the bin and at the oatlet of the loading chute. At the latter place at least one half cubic yard of material shall be run off and representative samples taken from it. These samples shall be well mixed in a composite sample and a 25-pound sample for test obtained by the quartering method shall be plainly marked and transmitted to the laboratory for examination. b. Where it is not practical to visit the plant, samples shall be taken from different parts of the car, boat, or wagon during unload ing. Separate samples shall be taken from the top, middle, and bottom of the car, boat, wagon, etc. These samples shall be well mixed Into a composite sample and a 25-pound sample obtained by the quartering method shall be plainly marked and transmitted to the laboratory for mechanical analysis. 2. Laboratory JSxamination.--Sieve Analysis ot Hoofing Gravel or Slag: a. A representative test sample of the surfacing material, which in an air-dry condition weighs about 5 pounds, shall be selected from the sample submitted to the laboratory by quartering or by the use of a sampler. b. The sieves shall be ot square-mesh wire cloth in the following sizes: %-inch, %-ineh, %-lnch, and %-inch, these being the widths of the clear openings. 0. The sample shall be separated by means of the sieves, sifting being continued until not more than I percent by weight of the sample passes any sieve during one minute. j. Each size shall be weighed on a balance or scale which Is sensi tive to 0.1 ounce (approximately 3 grams). e. The percentage by weight of the total sample passing each of the sieves shall be determined, and the percentage renorted to the nearest whole number. TO. YACKING AND HARKING Not applicable to this specification. vm. NOTES 1. specification applies to surfacing materials intended for surfacing built-up bituminous roofing. Materials may be used inter changeably, but must be applied in the manner described in the specifications for application ot the particular surfacing material. 2. Materials shall be purchased by weight or volume as specified In the contract. 3. The use of this specification for the commodity covered herein is mandatory on all procuring agencies of the Army. Notice.--When Government drawings, specifications, or other data are used for any purpose other than in connection with a definitely related Government procurement operation, the United States Gov- - [No. 81-7A1 ji J BIRD 006255 3 eminent thereby incurs no responsibility nor any obligation what soever; nnd the fact that the Government may have formulated, furnished, or in any way supplied, the said drawings, specifications, or other data, is not to be regarded by implication or otherwise as la any manner licensing the holder or any other person or corporation, or conveying any rights or permission .to manufacture, use, or sell any patented invention that may ih any way be related thereto. NOTE; Copies of this epecificeticn eay be obtained fro the Office, Chief of Engineere, U. S, ircgr, Washington, 0, C. BIRD 006256