1、Standard Specification for Coarse Aggregate for Hydraulic Cement Concrete AASHTO Designation: M 80-13 American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington, D.C. 20001 TS-1c M 80-1 AASHTO Standard Specification for Coarse Aggregate for
2、 Hydraulic Cement Concrete AASHTO Designation: M 80-13 1. SCOPE 1.1. This specification covers coarse aggregate, other than lightweight aggregate, for use in concrete. Several classes and gradings of coarse aggregate are described (Notes 1 and 2). Specifications for fine aggregate are provided in M
3、6. Note 1This specification is regarded as adequate to ensure satisfactory materials for most concrete. It is recognized that, for certain work or in certain regions, it may be either more or less restrictive than needed. Note 2Definitions of terms used in this specification may be found in ASTM C12
4、5. 1.2. The values stated in SI units are to be regarded as the standard. 2. REFERENCED DOCUMENTS 2.1. AASHTO Standards: M 6, Fine Aggregate for Hydraulic Cement Concrete M 43, Sizes of Aggregate for Road and Bridge Construction PP 65, Determining the Reactivity of Concrete Aggregates and Selecting
5、Appropriate Measures for Preventing Deleterious Expansion in New Concrete Construction T 2, Sampling of Aggregates T 11, Materials Finer Than 75-m (No. 200) Sieve in Mineral Aggregates by Washing T 19M/T 19, Bulk Density (“Unit Weight”) and Voids in Aggregate T 27, Sieve Analysis of Fine and Coarse
6、Aggregates T 96, Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine T 104, Soundness of Aggregate by Use of Sodium Sulfate or Magnesium Sulfate T 112, Clay Lumps and Friable Particles in Aggregate T 113, Lightweight Pieces in Aggregate 2.2. AST
7、M Standards: C125, Standard Terminology Relating to Concrete and Concrete Aggregates STP169D, Significance of Tests and Properties of Concrete and Concrete-Making Materials 3. ORDERING INFORMATION 3.1. The purchaser or specifier shall include the following information in the purchase order or contra
8、ct documents: 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-1c M 80-2 AASHTO 3.1.1. Reference to this specification, M 80, and year of issue; 3.1.2. Grading to be furnished (Size No.) (Section 5.1);
9、 3.1.3. Class designation of aggregate (Section 6.1 and Table 2); 3.1.4. In the case of the sulfate soundness test (Table 2), which salt is to be used. If none is stated, either salt may be used; 3.1.5. If additional requirements are necessary for addressing reactive materials (Section 6.2); and 3.1
10、.6. Any exceptions or additions to this specification. 4. GENERAL CHARACTERISTICS 4.1. Coarse aggregate shall consist of gravel, crushed gravel, crushed stone, crushed air-cooled blast-furnace slag, or crushed concrete, or a combination thereof, conforming to the requirements of this specification.
11、5. GRADING 5.1. Coarse aggregates shall conform to the requirements prescribed in M 43 for the size number specified. Note 3The ranges shown in M 43 are by necessity very wide in order to accommodate nationwide conditions. For quality control of any specific operation, a producer should develop an a
12、verage gradation for the particular source and production facilities, and control the gradation within reasonable tolerances from this average. Where coarse aggregate sizes numbers 357 or 467 are used, the aggregate should be furnished in at least two separate sizes. 6. DELETERIOUS SUBSTANCES AND PH
13、YSICAL PROPERTIES 6.1. Coarse aggregates shall conform to the limits given in Table 2 for the class specified, except as provided in Section 6.3 (see also Notes 4 and 5). Note 4Aggregate conforming to the requirements for the various classes should generally be suitable for the following uses as sho
14、wn in Table 1. Note 5The purchaser or specifier, due to his or her knowledge of the requirements for concrete aggregates for specific uses in specific areas, may wish to supplement the requirements of Table 2 by placing limits on the amount of local deleterious substances permitted. 2015 by the Amer
15、ican Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-1c M 80-3 AASHTO Table 1Typical Uses for Aggregate Conforming to the Requirements for the Various Classes Typical Uses (Suggested) Weathering Exposure Class of Aggregat
16、e Architectural concrete, bridge decks, other uses where surface disfigurement due to popouts, etc., is objectionable Severe Moderate Negligible A B C Concrete pavements, base courses, sidewalks where a moderate number of popouts can be tolerated Severe Moderate Negligible B C D Concealed concrete n
17、ot exposed to the weather: footings, structural members to be covered by a facing material, interior floors, etc. E Table 2Limits for Deleterious Substances and Physical Property Requirements of Coarse Aggregate for Concrete Maximum Allowable % Class Designation Clay Lumps and Friable Particles Cher
18、t (Less Than 2.40 sp gr SSD)aSum of Clay Lumps, Friable Particles, and Chert (Less Than 2.40 sp gr SSD)aMaterial Finer Than 75-m (No. 200) Sieve Coal and Lignite AbrasionbSodium Sulfate Soundness (5 Cycles)cA 2.0 3.0 3.0 1.0d0.5 50 12 B 3.0 3.0 5.0 1.0d0.5 50 12 C 5.0 5.0 7.0 1.0d0.5 50 12 D 5.0 8.0
19、 10.0 1.0d0.5 50 12 E 10.0 1.0d1.0 50 aThese limitations apply only to aggregate in which chert appears as an impurity. They are not applicable to gravels that are predominantly chert. Limitations on soundness of such aggregate must be based on service records in the environment in which they are us
20、ed. bCrushed air-cooled, blast-furnace slag is excluded from the abrasion requirements. The unit mass (by rodding or jigging) of crushed air-cooled blast-furnace slag shall be not less than 1120 kg/m3(70 lb/ft3). The grading of slag used in the unit mass test shall conform to the grading to be used
21、in the concrete. Abrasion loss of gravel, crushed gravel, or crushed stone shall be determined on the test size or sizes most nearly corresponding to the grading or gradings to be used in the concrete. When more than one grading is to be used, the limit on abrasion loss shall apply to each. cThe all
22、owable limits for soundness shall be 18 percent if magnesium sulfate is used. If the salt to be used is not designated, the aggregate will be acceptable if it meets the indicated limit for either sodium sulfate or magnesium sulfate. dIn the case of crushed aggregates, if the material finer than the
23、75-m (No. 200) sieve consists of the dust fraction, essentially free of clay or shale, this percentage may be increased to 1.5. 6.2. Coarse aggregate for use in concrete that will be subject to wetting, extended exposure to humid atmosphere, or contact with moist ground shall not contain any materia
24、ls that are deleteriously reactive with the alkalies in the cement in an amount sufficient to cause excessive expansion of mortar or concrete, except that if such materials are present in injurious amounts, the coarse aggregate may be used with the addition of a material that has been shown to preve
25、nt harmful expansion due to the alkali-aggregate reaction. Refer to the procedures described in PP 65 for identifying potentially deleteriously reactive aggregates and selecting appropriate preventive measures to minimize the risk of expansion when such aggregates are used in concrete. 6.3. Coarse a
26、ggregate having test results exceeding the limits specified in Table 2 may be accepted provided that concrete made with similar aggregate from the same source has given satisfactory service when exposed in a similar manner to that to be encountered, or, in the absence of a demonstrable service recor
27、dprovided that the aggregate produces concrete having satisfactory relevant properties when tested in the laboratory. Note 6Relevant properties are those properties of the concrete that are important to the particular application being considered. ASTM Special Technical Publication 169D provides a d
28、iscussion of important concrete properties. 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-1c M 80-4 AASHTO 7. METHODS OF SAMPLING AND TESTING 7.1. Sample and test the aggregates in accordance with t
29、he following methods of the American Association of State Highway and Transportation Officials, except as otherwise provided in this specification. Make the required tests on test samples that comply with requirements of the designated test methods. The same test sample may be used for sieve analysi
30、s and for determination of material finer than the 75-m (No. 200) sieve. Separated sizes from the sieve analysis may be used in preparation of samples for soundness or abrasion tests. For determination of all other tests and for evaluation of potential alkali reactivity where required, use independe
31、nt test samples. 7.1.1. SamplingT 2; 7.1.2. GradingT 27; 7.1.3. Amount of Material Finer than 75-m (No. 200) SieveT 11; 7.1.4. SoundnessT 104; 7.1.5. Clay Lumps and Friable ParticlesT 112; 7.1.6. Coal and LigniteT 113, using a liquid of 2.0 specific gravity to remove the particles of coal and lignit
32、e; only material that is brownish-black, or black, shall be considered coal or lignite; coke shall not be classed as coal or lignite; 7.1.7. Unit Mass of SlagT 19M/T 19 using the procedure for unit mass by rodding or jigging; and 7.1.8. AbrasionT 96. 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.
