AASHTO M 85-2018 Standard Specification for Portland Cement.pdf

1、Standard Specification for Portland Cement AASHTO Designation: M 85-18 Technical Section: 3a, Hydraulic Cement and Lime Release: Group 1 (April) ASTM Designation: C150/C150M-18 American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington, D.C

2、. 20001 TS-3a M 85-1 AASHTO Standard Specification for Portland Cement AASHTO Designation: M 85-18 Technical Section: 3a, Hydraulic Cement and Lime Release: Group 1 (April) ASTM Designation: C150/C150M-18 1. SCOPE 1.1. This specification covers ten types of portland cement as follows (see Note 1): 1

3、.1.1. Type IFor use when the special properties specified for any other ty pe are not required; 1.1.2. Type IAAir-entraining cement for the sa me uses as Type I, where air entrainment is desired; 1.1.3. Type IIFor general use, more especially when moderate sulfate resista nce is desired; 1.1.4. Type

4、 IIAAir-entraining cement for the same uses as Type II, where air entrainment is desired; 1.1.5. Type II(MH)For general use, more especia lly when moderate heat of hydration and moderate sulfate resistance are desired. 1.1.6. Type II(MH)AAir-entraining cement for the sa me uses as Type II(MH), where

5、 air entrainment is desired. 1.1.7. Type IIIFor use when high early strength is desired; 1.1.8. Type IIIAAir-entraining cement for the s ame use as Type III, where air entrainment is desired; 1.1.9. Type IVFor use when low heat of hydration is desired; and 1.1.10. Type VFor use when high sulfate res

6、istance is desired. Note 1Some cements are designated with a combined type classificatio n, such as Type I/II, indicating that the cement meets the requirements of the indicated types and is being offered as suitable for use when either type is desired. 1.2. When both SI and inch-pound units are pre

7、sent, the SI units are the standard. The inch-pound units are approximations listed for information only. 1.3. The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requ

8、irements of the standard. 2018 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-3a M 85-2 AASHTO 2. REFERENCED DOCUMENTS 2.1. AASHTO Standards: M 327, Processing Additions for Use in the Manufacture of Hyd

9、raulic Cements R 71, Sampling and Amount of Testing of Hydraulic Cement T 98M/T 98, Fineness of Portland Cement by the Turbidimeter T 105, Chemical Analysis of Hydraulic Cement T 106M/T 106, Compressive Strength of Hydraulic Cement Mortar (Using 50-mm or 2-in. Cube Specimens) T 107M/T 107, Autoclave

10、 Expansion of Hydraulic Cement T 131, Time of Setting of Hydraulic Cement by Vicat Needle T 137, Air Content of Hydraulic Cement Mortar T 153, Fineness of Hydraulic Cement by Air Permeability Apparatus T 154, Time of Setting of Hydraulic Cement Paste by Gillmore Needles T 186, Early Stiffening of Hy

11、draulic Cement (Paste Method) 2.2. ASTM Standards: C33/C33M, Standard Specification for Concrete Aggregates C51, Standard Terminology Relating to Lime and Limestone (as used by the Industry) C226, Standard Specification for Air-Entraining Additions for Use in the Manufacture of Air-Entraining Hydrau

12、lic Cement C452/C452M, Standard Test Method for Potential Expansion of Portland-Cement Mortars Exposed to Sulfate C563, Standard Test Method for Approximation of Optimum SO3in Hydraulic Cement C1038/C1038M, Standard Test Method for Expansion of Hydraulic Cement Mortar Bars Stored in Water C1702, Sta

13、ndard Test Method for Measurement of Heat of Hydration of Hydraulic Cementitious Materials Using Isothermal Conduction Calorimetry E29, Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications 3. TERMINOLOGY 3.1. Definitions: 3.1.1. portland cementa hy

14、draulic cement produced by pulverizing clinker, consisting essentially of hydraulic calcium silicates, and usually containing one or more of the following: water, calcium sulfate, up to 5 percent limestone, and processing additions. 3.1.2. air-entraining portland cementa portland cement containing a

15、n interground air-entraining addition. 3.1.3. hydraulic cementa cement that sets and hardens by chemical interaction with water and is capable of doing so under water. 2018 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of a

16、pplicable law.TS-3a M 85-3 AASHTO 4. ORDERING INFORMATION 4.1. Orders for material under this specification shall include the following: 4.1.1. This specification number and date; 4.1.2. Type or types allowable. If no type is specified, Type I shall be supplied; 4.1.3. Any optional chemical requirem

17、ents from Table 2, if desired; and 4.1.4. Any optional physical requirements from Table 4, if desired. Note 2Cement conforming to the requirements for all types is not carried in stock in some areas. In advance of specifying the use of other than Type I cement, determine whether the proposed type of

18、 cement is, or can be made, available. 5. INGREDIENTS 5.1. The cement covered by this specification shall contain no ingredients except as follows: 5.1.1. Portland Cement Clinker. 5.1.2. Water or Calcium Sulfate or BothThe amounts shall be such that the limits shown in Table 1 for sulfur trioxide an

19、d loss on ignition shall not be exceeded. 2018 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-3a M 85-4 AASHTO Table 1Standard Chemical RequirementsaCement Type Applicable Test Method I and IA II and IIA

20、 II(MH) and II(MH)A III and IIIA IV V Aluminum oxide (Al2O3), max, % T 105 6.0 6.0 Ferric oxide (Fe2O3), max, % T 105 6.0c6.0b, c 6.5 Magnesium oxide (MgO), max, % T 105 6.0 6.0 6.0 6.0 6.0 6.0 Sulfur trioxide (SO3),dmax, % T 105 When (C3A)eis 8% or less 3.0 3.0 3.0 3.5 2.3 2.3 When (C3A)eis more th

21、an 8% 3.5 f f4.5 f f Loss on ignition, max, % T 105 When limestone is not an ingredient 3.0 3.0 3.0 3.0 2.5 3.0 When limestone is an ingredient 3.5 3.5 3.5 3.5 3.5 3.5 Insoluble residue, max, % T 105 1.5 1.5 1.5 1.5 1.5 1.5 Tricalcium silicate (C3S),emax, % See Annex A 35b Dicalcium silicate (C2S),e

22、min, % See Annex A 40b Tricalcium aluminate (C3A),emax, % See Annex A 8 8 15 7b 5c Sum of C3S + 4.75C3A, max, %g 100b, h Tetracalcium aluminoferrite plus twice the tricalcium aluminate (C4AF + 2(C3A), or solid solution (C4AF + C2F), as applicable, max, % See Annex A 25c a See Note 2.b Does not apply

23、 when the heat of hydration limit in Table 4 is specified. c Does not apply when the sulfate resistance limit in Table 4 is specified. d It is permissible to exceed the values in the table for SO3 content, provided it has been demonstrated by ASTM C1038/C1038M that the cement with the increased SO3

24、will not develop expansion exceeding 0.020 percent at 14 days. When the manufacturer supplies cement under this provision, supporting data shall be supplied to the purchaser. See Note 6. e See Annex A for calculation. f Not applicable. g See Note 5. h In addition, 3-day heat of hydration testing by

25、ASTM C1702 shall be conducted at least once every 6 months. Such testing shall not be used for acceptance or rejection of the cement, but results shall be reported for informational purposes. 5.1.3. LimestoneThe amount shall be not more than 5.0 percent by mass such that the chemical and physical re

26、quirements of this standard are met (see Note 3). The limestone, defined in ASTM C51, shall be naturally occurring and consist of at least 70 percent by mass of one or more of the mineral forms of calcium carbonate. If limestone is used, the manufacturer shall report the amount used, expressed as a

27、percentage of cement mass, as determined using Annex B, along with the oxide composition of the limestone. Note 3This standard permits portland cement to contain limestone, but does not require that limestone be an ingredient in the cement. Cement without ground limestone can be specified in the con

28、tract or order. 5.1.4. Inorganic Processing AdditionsThe amount shall not be more than 5.0 percent by mass of cement. Not more than one inorganic processing addition shall be used at a time. For amounts greater than 1.0 percent, they shall have been shown to meet the requirements of M 327 for inorga

29、nic processing additions in the amount used or greater. If an inorganic processing addition is used, the manufacturer shall report the amount used, expressed as a percentage of cement mass, along with the oxide composition of the processing addition (see Note 4). Note 4These requirements are based o

30、n data and recommendations by Taylor.1 5.1.5. Organic Processing AdditionsThese additions shall have been shown to meet the requirements of M 327 in the amounts used or greater, and the total amount of organic processing additions used shall not exceed 1.0 percent of the weight of portland cement cl

31、inker. 5.1.6. Air-Entraining Addition (for Air-Entraining Portland Cement Only)The interground addition shall conform to the requirements of ASTM C226. 2018 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS

32、-3a M 85-5 AASHTO 6. CHEMICAL COMPOSITION 6.1. Portland cement of each of the ten types shown in Section 1 shall conform to the respective standard chemical requirements prescribed in Table 1. In addition, optional chemical requirements are shown in Table 2. Note 5The limit on the sum, C3S + 4.75C3A

33、, in Table 1 provides control on the heat of hydration of the cement and is consistent with an ASTM C1702 3-day heat of hydration limit of 315 kJ/kg (75 cal/g). Note 6There are cases where performance of a cement is improved with SO3in excess of the Table 1 limits in this specification. ASTM C563 is

34、 one of several methods a manufacturer can use to evaluate the effect of sulfate content on cement characteristics. Whenever SO3content of a cement exceeds Table 1 limits, ASTM C1038/C1038M results provide evidence that excessive expansion does not occur at this higher sulfate content. Table 2Option

35、al Chemical RequirementsaCement Type Applicable Test Method I and IA II and IIA II(MH) and II(MH)A III and IIIA IV V Remarks Tricalcium aluminate (C3A),b max, % See Annex A 8 For moderate sulfate resistance Tricalcium aluminate (C3A),b max, % See Annex A 5 For high sulfate resistance Equivalent alka

36、lies (Na2O + 0.658K2O), max, % T 105 0.60c0.60c0.60c0.60c0.60c0.60cLow-alkali cement a These optional requirements apply only if specifically requested. Availability should be verified. See Note 2. b See Annex A for calculation. c Specify this limit when the cement is to be used in concrete with agg

37、regates that are potentially reactive and no other provisions have been made to protect the concrete from deleteriously reactive aggregates. Refer to ASTM C33/C33M for information on potential reactivity of aggregates. 7. PHYSICAL PROPERTIES 7.1. Portland cement of each of the ten types shown in Sec

38、tion 1 shall conform to the respective standard physical requirements prescribed in Table 3. In addition, optional physical requirements are shown in Table 4. 2018 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable

39、 law.TS-3a M 85-6 AASHTO Table 3Standard Physical Requirements Cement TypeaApplicable Test Method I IA II IIA II(MH) II(MH)A III IIIA IV V Air content of mortar, volume, %bT 137 Maximum 12 22 12 22 12 22 12 22 12 12 Minimum 16 16 16 16 Fineness, specific surface, m2/kg Air permeability test: T 153 M

40、inimum 260 260 260 260 260 260 260 260 Maximum 430c430c 430 Autoclave expansion, Max, % T 107M/T 107 0.80 0.80 0.80 0.80 0.80 0.80 0.80 0.80 0.80 0.80 Strength, not less than value shown for ages indicated belowd: Compressive strength, MPa (psi) T 106M/ T 106 1 day 12.0 (1740) 10.0 (1450) 3 days 12.

41、0 (1740) 10.0 (1450) 10.0 (1450) 8.0 (1160) 10.0 (1450) 7.0e (1020)e8.0 (1160) 6.0e(870)e24.0 (3480) 19.0 (2760) 8.0 (1160) 7 days 19.0 (2760) 16.0 (2320) 17.0 (2470) 14.0 (2030) 17.0 (2470) 12.0e (1740)e14.0 (2030) 9.0e (1310)e 7.0 (1020) 15.0 (2180) 28 days 17.0 (2470) 21.0 (3050) Time of setting,

42、 minutes (alternative methods): fGillmore test: T 154 Initial set, minutes, not less than 60 60 60 60 60 60 60 60 60 60 Final set, minutes, not more than 600 600 600 600 600 600 600 600 600 600 Vicat test:gT 131 Time of setting, minutes, not less than 45 45 45 45 45 45 45 45 45 45 Time of setting, m

43、inutes, not more than 375 375 375 375 375 375 375 375 375 375 a See Note 2. b Compliance with the requirements of this specification does not necessarily ensure that the desired air content will be obtained in concrete. c Maximum fineness limits do not apply if the sum of C3S + 4.75C3A is less than

44、or equal to 90. d The strength at any specified test age shall be not less than that attained at any previous specified test age. e When the optional heat of hydration in Table 4 is specified. f The purchaser should specify the type of setting-time test required. In case he does not so specify, the

45、requirements of the Vicat test only shall govern. g The time of setting is that described as initial setting time in T 131. 2018 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-3a M 85-7 AASHTO Table 4Opt

46、ional Physical RequirementsaCement Type Applicable Test Method I and II IA and IIA II(MH) II(MH)A III and IIIA IV V False set, final penetration, minutes, percent T 186 50 50 50 50 50 50 50 Heat of hydration Isothermal conduction calorimetry: ASTM C1702 3 days, max, kJ/kg (cal/g) 255 (60)b255 (60)b

47、200 (50)c 7 days, max, kJ/kg (cal/g) 225 (55)c Strength, not less than values shown: Compressive strength, MPa (psi), 28 days T 106M/ T 106 28.0 (4060) 22.0 (3190) 28.0 (4060) 22.0 (3190) 22.0b18.0b (3190)b(2610)b Sulfate resistance, 14 days, max, % expansiondASTM C452/ C452M eeee 0.040 Turbidimeter

48、 test T 98M/T 98 Minimum 150 150 150 150 150 150 Max 245f245f 245 a These optional requirements apply only if specifically requested. Availability should be verified. See Note 2 in Section 4. b The limit for the sum of the tricalcium silicate and 4.75 times the tricalcium aluminate in Table 1 shall not apply when this optional limit is requested. These strength requirements apply when the optional heat of hydration requirement is requested. c When the heat of hydration limit is specified, it shall be used instead of the limits of C3S, C2S, C3A, and Fe2O3 listed in