1、Standard Specification for Burlap Cloth Made from Jute or Kenaf and Cotton Mats AASHTO Designation: M 182-05 (2012) American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington, D.C. 20001TS-3b M 182-1 AASHTO Standard Specification for Burlap
2、 Cloth Made from Jute or Kenaf and Cotton Mats AASHTO Designation: M 182-05 (2012) 1. SCOPE, CLASSIFICATION, AND DEFINITION 1.1. ScopeThis specification covers requirements for burlap made from jute or kenaf and cotton mats for use in curing concrete. 1.2. ClassificationsThe burlap shall be of one t
3、ype and four classes mass based on a 1016-mm (40-in.) width, as specified: Class 1233 g/m (7.5 oz/yd) Class 2248 g/m (8 oz/yd) Class 3310 g/m (10 oz/yd) Class 4372 g/m (12 oz/yd) 1.3. Jute and KenafJute is defined as the bast fiber obtained from various species of Corchorus. Kenaf is defined as the
4、bast fiber obtained from Hibiscus cannabinus. 1.4. CottonCotton is a vegetable fiber harvested from the cotton plant. The cotton plant belongs to the genus Gossypium of the family Malvaceae. 1.5. The values stated in SI units are to be regarded as the preferred standard. 2. MATERIAL 2.1. The burlap
5、cloth shall be made of jute or kenaf at the option of the manufacturer. It shall have a plain weave and conform to the physical requirements given in Tables 1 or 2. Table 1Physical Requirements (SI) Class Mass per Linear Meter (1016-mm Basis), g Yarns per Meter of Warp Yarns per Meter of Filling Mas
6、s per Square Meter,ag 1 233 315 to 433 inclusive 315 to 433 inclusive 229 2 248 354 to 472 inclusive 354 to 433 inclusive 244 3 310 433 to 512 inclusive 394 to 472 inclusive 305 4 372 433 to 512 inclusive 433 to 512 inclusive 366 a A plus or minus tolerance of 5 percent will be permitted. 2015 by th
7、e American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-3b M 182-2 AASHTO Table 2Physical Requirements (inch-pound) Class Weight per Linear Yard (40-Inch Basis), Ounces Yarns per Inch of Warp Yarns per Inch of Filling
8、Weight per Square Yarda1 71/28 to 11, inclusive 8 to 11, inclusive 6.7 2 8 9 to 12, inclusive 9 to 11, inclusive 7.2 3 10 11 to 13, inclusive 10 to 12, inclusive 9.0 4 12 11 to 13, inclusive 11 to 13, inclusive 10.8 a A plus or minus tolerance of 5 percent will be permitted. 2.2. Unless otherwise sp
9、ecified, the burlap shall have minimum width of 1016 mm (40 in.) inclusive of selvage and shall be in one continuous piece of not less than 23 m (25 yd). 2.3. The selvages shall be firm and straight and may contain cotton yarn. 2.4. Cotton mats shall consist of a filling material of cotton “bat” or
10、“bats” of at least 400 g/m2(12 oz per yd2), covered with unsized cloth at a minimum of 200 g/m2(6 oz per yd2), and tufted or stitched to maintain stability. 3. FREEDOM FROM DEFECTS 3.1. The burlap and cotton mats shall be clean and evenly woven and shall conform to the quality and product requiremen
11、ts established by this specification. The occurrence of defects shall not exceed the applicable acceptable quality levels. 3.2. Examine the burlap and cotton mats for visual defects that would impair their suitability for use. Cuts; tears; broken or missing yarns; thin, open, or weak places; uneven
12、weaving; and grease spots or stains shall be noted. 4. SAMPLING AND TESTING 4.1. LotUnless otherwise specified, cloths and cotton mats of the same class presented at one time shall be considered a lot for purposes of inspection and tests. 4.2. Sampling for TestUnless otherwise specified, take random
13、 samples of cloth and cotton mats from each inspection lot in accordance with Table 3. 4.3. InspectionEach of the samples selected in accordance with Table 3, or as specified, shall be visually and dimensionally inspected in accordance with the requirements of Sections 3.1 and 3.2. Table 3Sampling f
14、or Inspection and Tests Number of Rolls in Lot Number of Rolls in SampleaAcceptance Number (Defective) Rejection Number (Defective) 8 and under 2 0 1 9 to 15 3 0 1 16 to 40 4 0 1 41 and over 5 0 1 aOne unit of product at least 1 m (1 yd) long and the full width of the cloth shall be taken from each
15、sample roll. 4.4. TestsSamples selected for tests in accordance with Table 3, or as otherwise specified, shall be tested to determine compliance with the requirements given in Tables 1 or 2. 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplicati
16、on is a violation of applicable law.TS-3b M 182-3 AASHTO 5. BASIS FOR REJECTION 5.1. Any unit of product in the sample failing to conform to the requirements shall be considered defective. If the number of defective units of products in the sample for test exceeds the acceptance number for that samp
17、le specified in Table 3, the entire lot of cloth from which the sample was taken shall be considered as having failed to meet the requirements of this specification and may be rejected. 6. PACKING 6.1. Pack the burlap cloth and cotton mats in a manner acceptable to common carriers for safe transport
18、ation to point of destination specified in shipping instructions at the lowest transportation rate for such supplies. 6.2. Each roll or cotton mat shall have a ticket attached to the selvage at the inner end of the cloth or cotton mat giving the length and width and name and address of the manufacturer. 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.
