1、Designation: C1884 18Standard Specification forConcrete Ballast Block1This standard is issued under the fixed designation C1884; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses ind
2、icates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers dry-cast concrete ballastblocks that are primarily used for ballast of rooftop equipment.These units are machine-made from hydraulic c
3、ement, water,and suitable mineral aggregates with or without the inclusionof other materials.NOTE 1The design of concrete ballast block systems for resistingwind uplift is beyond the scope of this specification. Building codes andother standards should be consulted in designing for wind uplift resis
4、-tance.1.2 The text of this standard references notes and footnotesthat provide explanatory material. These notes and footnotes(excluding those in tables and figures) shall not be consideredas requirements of the standard.1.3 The values stated in inch-pound units are to be regardedas standard. The v
5、alues given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to e
6、stablish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Princip
7、les for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:C33/C33M Specification for Concrete AggregatesC140/C140M Test Methods for Sampling and Testing Co
8、n-crete Masonry Units and Related UnitsC150/C150M Specification for Portland CementC331/C331M Specification for Lightweight Aggregates forConcrete Masonry UnitsC595/C595M Specification for Blended Hydraulic CementsC618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in Con
9、creteC979/C979M Specification for Pigments for Integrally Col-ored ConcreteC989/C989M Specification for Slag Cement for Use inConcrete and MortarsC1157/C1157M Performance Specification for HydraulicCementC1232 Terminology for MasonryC1240 Specification for Silica Fume Used in CementitiousMixturesC12
10、62/C1262M Test Method for Evaluating the Freeze-Thaw Durability of Dry-Cast Segmental Retaining WallUnits and Related Concrete Units3. Terminology3.1 Terminology defined in Terminology C1232 shall applyto this specification.3.2 Definitions of Terms Specific to This Standard:3.2.1 concrete ballast bl
11、ock, na manufactured concreteunit used primarily to provide weight for stabilizing rooftopequipment.3.2.1.1 DiscussionAn example application for concreteballast block is ballast for photovoltaic arrays.4. Material4.1 Cementitious MaterialsMaterials shall conform to thefollowing applicable specificat
12、ions:4.1.1 Portland CementSpecification C150/C150M.4.1.2 Modified Portland CementPortland cement con-forming to Specification C150/C150M, modified as follows:4.1.2.1 LimestoneLimestone, with a minimum 85 % cal-cium carbonate (CaCO3) content, shall be permitted to beadded to the cement, provided the
13、requirements of Specifica-tion C150/C150M are modified as follows:(1) Limitation on Insoluble Residue1.5 %.(2) Limitation on Air Content of MortarVolume percent,22 % max.(3) Limitation on Loss on Ignition7 %.4.1.3 Blended CementsSpecification C595/C595M.4.1.4 Hydraulic CementSpecification C1157/C115
14、7M.4.1.5 PozzolansSpecification C618.1This specification is under the jurisdiction of ASTM Committee C15 onManufactured Masonry Units and is the direct responsibility of SubcommitteeC15.03 on Concrete Masonry Units and Related Units.Current edition approved Dec. 1, 2018. Published December 2018. DOI
15、:10.1520/C1884-18Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDev
16、elopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.14.1.6 Blast Furnace Slag CementSpecification C989/C989M.4.1.7 Silica FumeSpecification C1240.4.2 AggregatesAggregates shall conform to the followingspec
17、ifications, except for grading requirements:4.2.1 Normal Weight AggregatesSpecification C33/C33M.4.2.2 Lightweight AggregatesSpecification C331/C331M.NOTE 2The grading requirements of Specifications C33/C33M andC331/C331M may not be suitable for concrete ballast block production.Because of this, pro
18、ducers are allowed to modify grading to meet theirneeds and the requirements of this specification.4.3 Pigments for Integrally Colored ConcreteSpecification C979/C979M.4.4 Other ConstituentsAir-entraining agents, integral wa-ter repellents, and other constituents shall be previously estab-lished as
19、suitable for use in concrete roof pavers and shallconform to applicable ASTM standards or shall be shown bytest or experience satisfactory to the purchaser to be notdetrimental to the durability of the units or any materialcustomarily used in concrete roof pavers.5. Physical Requirements5.1 At the t
20、ime of delivery to the purchaser, the units shallconform to the physical requirements of Table 1 when tested inaccordance with 7.2.NOTE 3The purchaser is the public body or authority, association,corporation, partnership, or individual entering into a contract or agree-ment to purchase or install, o
21、r both, concrete ballast block. The time ofdelivery to the purchaser is FOB plant when the purchaser or thepurchasers agent transports the concrete ballast block, or at the timeunloaded at the worksite if the manufacturer or the manufacturers agenttransports the concrete ballast block.5.2 Freeze-Tha
22、w DurabilityIn areas where repeated freez-ing and thawing under saturated conditions occur, freeze-thawdurability shall be demonstrated by test or by proven fieldperformance that the concrete ballast block units have adequatedurability for the intended use. When testing is required by thespecifier t
23、o demonstrate freeze thaw durability, the units shallbe tested in accordance with 7.3.5.2.1 The weight loss of each of five test specimens at theconclusion of 100 cycles in tap water shall not exceed 5 % ofits initial weight.5.3 All units shall be sound and free of cracks or otherdefects that would
24、interfere with the proper placement of theunit or would significantly impair the strength or permanenceof the construction. Minor cracks incidental to the usualmethod of manufacture or minor chipping resulting fromcustomary methods of handling in shipment and delivery arenot grounds for rejection.5.
25、4 A shipment shall not contain more than 5 % of units,including broken units, that do not meet the requirements of6.1.6. Permissible Variations in Dimension and Weight6.1 Overall dimensions for width, height, and length shallnot differ by more than 618 in. (3.2 mm) from the specifiedstandard dimensi
26、ons.6.2 For concrete ballast block, the average oven-dry weightof the three specimens tested shall meet or exceed the specifiedminimum weight, with no individual unit less than 90 % of thespecified minimum weight.7. Sampling and Testing7.1 The purchaser or authorized representative shall beaccorded
27、proper facilities to inspect and sample the units at theplace of manufacture from the lots ready for delivery.7.2 Compressive strength, absorption, density, ballastweight and dimensional tolerances shall be based on tests ofunits of any configuration or dimensions made with the samematerials, concre
28、te mix design, manufacturing process, andcuring method, conducted in accordance with Test MethodsC140/C140M and within 12 months of production of the units.7.2.1 Concrete ballast block shall be tested in accordancewith Annex A3 of Test Methods C140/C140M.7.3 When required, freeze-thaw durability sha
29、ll be based ontests of units of any configuration or dimension made with thesame materials, concrete mix design, manufacturing process,and curing method, conducted in accordance with Test MethodC1262/C1262M and within 24 months of production of theunits.8. Compliance8.1 If a sample fails to conform
30、to the specifiedrequirements, the manufacturer shall be permitted to removeunits from the shipment. A new sample shall be selected by thepurchaser from remaining units from the shipment with asimilar configuration and dimension and tested at the expenseof the manufacturer. If the second sample meets
31、 the specifiedrequirements, the remaining portion of the shipment repre-sented by the sample meets the specified requirements. If thesecond sample fails to meet the specified requirements, theremaining portion of the shipment represented by the samplefails to meet the specified requirements.TABLE 1
32、Physical RequirementsDensity ClassificationOven-Dry Density ofConcrete lb/ft3(kg m3)Maximum Water Absorption, lb/ft3(kg m3) Minimum Net Area Compressive Strength, lb/in.2(MPa)Average of 3 units Average of 3 units Individual Unit Average of 3 units Individual UnitLightweight Less than 105 (1680) 18 (
33、288) 20 (288) 3000 (20.7) 2500 (17.2)Medium Weight 105 to less than 125(1680 to 2000)15 (240) 15 (240) 3000 (20.7) 2500 (17.2)Normal Weight 125 (2000) or more 13 (208) 13 (208) 3000 (20.7) 2500 (17.2)C1884 182NOTE 4Unless otherwise specified in the purchase order, the cost oftests is typically borne
34、 as follows: (1) If the results of the tests show thatthe units do not conform to the requirements of this specification, the costis typically borne by the seller. (2) If the results of the tests show that theunits conform to the specification requirements, the cost is typically borneby the purchase
35、r.9. Keywords9.1 absorption; aggregates; ballast weight; cementitious;compressive strength; concrete ballast block; durability; lime-stone; portland cementASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.
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