AASHTO M 303-1989 Standard Specification for Lime for Asphalt Mixtures《沥青混合料用石灰的标准规范》.pdf

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1、Standard Specification for Lime for Asphalt Mixtures AASHTO Designation: M 303-89 (2014)1American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington, D.C. 20001TS-3a M 303-1 AASHTO Standard Specification for Lime for Asphalt Mixtures AASHTO

2、Designation: M 303-89 (2014)11. SCOPE 1.1. This specification covers two types of lime to be used for reducing water susceptibility in asphalt mixtures. 1.1.1. Type IHigh calcium-hydrated lime containing maximum magnesium content, calculated as magnesium oxide, of 4 percent by mass. Compliance with

3、chemical composition requirements shall be determined by use of T 219 (see Note 1). Note 1Magnesium oxide content may be determined by ASTM C25. 1.1.2. Type IIMagnesium or dolomitic lime containing magnesium, calculated as magnesium oxide, greater than 4 percent but no more than 36 percent by mass.

4、Compliance with chemical composition requirements shall be determined by use of ASTM C25 (see Note 2). Note 2Except that Section 2, “Samples for Analysis,” is excluded. 1.2. The values stated in SI units are to be regarded as the standard. 2. REFERENCED DOCUMENTS 2.1. AASHTO Standards: T 218, Sampli

5、ng Hydrated Lime T 219, Testing Lime for Chemical Constituents and Particle Sizes T 283, Resistance of Compacted Asphalt Mixtures to Moisture-Induced Damage 2.2. ASTM Standards: C25, Standard Test Methods for Chemical Analysis of Limestone, Quicklime, and Hydrated Lime D1075, Standard Test Method fo

6、r Effect of Water on Compressive Strength of Compacted Bituminous Mixtures 3. CHEMICAL LIMITS 3.1. Types I and II lime, when sampled and tested by procedures prescribed herein, shall conform to the following requirements. (See Tables 1 and 2.) 3.2. Type II lime, when tested in accordance with ASTM C

7、25, shall conform to the requirements listed in Table 2. 2016 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-3a M 303-2 AASHTO Table 1Types I and II Requirements Min total active lime content, percent by

8、mass 90 (Percent by mass Ca(OH)2+ percent by mass Ca(O)a) Max unhydrated lime content, percent by mass CaO 7 Max “Free Water” content, percent by mass H2O 3 a No more than 7 percent by mass calcium oxide (unhydrated lime) will be allowed in determining total active lime content. Table 2Type II Requi

9、rements (when tested by ASTM C25) Calcium and magnesium oxide content of ignition residue, min, percenta96 Carbon dioxide (as received basis), max, percent 4 Unhydrated calcium oxide (as received basis), max, percent 7 a Ignition to constant mass shall be performed utilizing an electric muffle furna

10、ce operating at10001100oC 18002000oF. 4. PHYSICAL REQUIREMENTS 4.1. Types I and II lime shall conform to the following particle size requirements when tested according to T 219: Maximum residue retained on a 600-m (No. 30) sieve, percent by mass 3 Maximum residue retained on a 75-m (No. 200) sieve,

11、percent by mass 20 5. PACKAGING AND MARKING 5.1. When the lime is delivered in bags, the name and brand of the manufacturer and type shall be plainly identified thereon. A bag shall contain a nominal mass of 25 kg (50 lb), and all bags shall be in good condition at the time of inspection. When lime

12、is delivered in bulk, information regarding type and manufacturer shall be contained in the invoice accompanying the shipment. 6. INSPECTION 6.1. Every facility shall be available to the purchaser for careful sampling and inspection of the lime at either the plant or at the worksite as specified by

13、the purchaser. 7. REJECTION 7.1. The lime shall be rejected if it fails to meet any of the requirements of this specification. 7.2. In the case of bag lime, bags varying more than 5 percent from the specified mass may be rejected. If the average mass of bags in any shipment as shown by weighing 50 b

14、ags taken at random is less than that specified, the entire shipment may be rejected. 8. METHODS OF SAMPLING AND TESTING 8.1. The sampling and testing of lime shall be in accordance with the following standard methods of AASHTO or ASTM: 8.1.1. SamplingT 218. 8.1.2. Chemical Analysis for Type I LimeT

15、 219. 2016 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-3a M 303-3 AASHTO 8.1.3. Chemical Analysis for Type II LimeASTM C25. 8.1.4. Physical RequirementsQuantity of lime required to correct water suscep

16、tibility can be determined from test results obtained in accordance with T 283 or ASTM D1075. 9. KEYWORDS 9.1. Hydrated lime; lime; lime for asphalt. 1Minor editorial revisions have been made at the discretion of the authors responsible for standards on hydraulic cement and lime (technical section 3a). 2016 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.