1、Designation: C1670/C1670M 14C1670/C1670M 15Standard Specification forAdhered Manufactured Stone Masonry Veneer Units1This standard is issued under the fixed designation C1670/C1670M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision,
2、the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.INTRODUCTIONThe purpose of this standard is to establish the minimum product specifications for adheredmanufactured st
3、one masonry veneer units. These units are manufactured using a wet cast concretemixture and finished to simulate stone, rocks found in nature, and other textures.1. Scope*1.1 This specification covers the minimum product requirements for adhered manufactured stone masonry veneer units appliedas an a
4、dhered veneer to exterior and interior walls and structures suitable to receive units.1.2 The property requirements of this specification apply at the time of delivery. This standard does not address the physicalevaluation of installed units removed from service.1.3 The units described by this speci
5、fication are manufactured from a mixture of cement, normal or lightweight aggregates (ora combination of both), water, admixtures, other cementitious materials and other components which are wet-cast into shapessimulating the appearance of natural stone and other textures.1.4 The values stated in ei
6、ther SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may result in non-conformance with the standard.1.5 The tex
7、t of this specification references notes and footnotes which provide explanatory material. These notes and footnotesshall not be considered as requirements of the standard.1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibil
8、ityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use of units.NOTE 1When particular features are desired such as surface textures or color these features should be specified separately. Suppliers sh
9、ould beconsulted as to the availability of units having the desired features.2. Referenced Documents2.1 ASTM Standards:C31/C31M Practice for Making and Curing Concrete Test Specimens in the FieldC33 Specification for Concrete AggregatesC39/C39M Test Method for Compressive Strength of Cylindrical Con
10、crete SpecimensC140 Test Methods for Sampling and Testing Concrete Masonry Units and Related UnitsC150 Specification for Portland CementC207 Specification for Hydrated Lime for Masonry PurposesC260 Specification for Air-Entraining Admixtures for ConcreteC330 Specification for Lightweight Aggregates
11、for Structural ConcreteC331 Specification for Lightweight Aggregates for Concrete Masonry UnitsC426 Test Method for Linear Drying Shrinkage of Concrete Masonry UnitsC482 Test Method for Bond Strength of Ceramic Tile to Portland Cement Paste1 This test method is under the jurisdiction ofASTM Committe
12、e C15 on Manufactured Masonry Units and is the direct responsibility of Subcommittee C15.03 on ConcreteMasonry Units and Related Units.Current edition approved Aug. 1, 2014Sept. 1, 2015. Published September 2014September 2015. Originally approved in 2013. Last previous edition approved in 20132014as
13、 C1670/C1670M 13a.C1670/C1670M 14. DOI: 10.1520/C1670_C1670M14.10.1520/C1670_C1670M15.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to
14、adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright A
15、STM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1C494/C494M Specification for Chemical Admixtures for ConcreteC595 Specification for Blended Hydraulic CementsC618 Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Conc
16、reteC666/C666M Test Method for Resistance of Concrete to Rapid Freezing and ThawingC979 Specification for Pigments for Integrally Colored ConcreteC989 Specification for Slag Cement for Use in Concrete and MortarsC1116/C1116M Specification for Fiber-Reinforced ConcreteC1157 Performance Specification
17、for Hydraulic CementC1232 Terminology of MasonryC1240 Specification for Silica Fume Used in Cementitious Mixtures3. Terminology3.1 Terminology defined in Terminology C1232 shall apply for this specification.3.2 Definitions of Terms Specific to This Standard:3.2.1 adhered manufactured stone masonry v
18、eneer unit, na non-load bearing masonry unit that is produced by wet-castblending of cementitious material, lightweight and other aggregates, pigments and admixtures, designed to be applied with acementitious mortar to a backing surface.3.2.2 unit profile, nthe combination of units that represent th
19、e range of shapes and sizes provided in the specified veneer.3.2.3 average thickness, nthe mean of the depth measurement of the unit as measured from the back side to the face side.3.2.4 designated area, nthe area of a completed wall section that is used to verify compliance.3.2.5 saturated density,
20、 nthe water saturated weight of the cured specimen divided by the volume of the specimen.3.2.6 wet cast, adjmanufactured from a measurable slump concrete.4. Materials4.1 Cementitious materials shall conform to the following applicable specifications:4.1.1 Portland CementSpecification C150.4.1.2 Blen
21、ded Hydraulic CementsSpecification C595.4.1.3 PozzolansSpecification C618.4.1.4 Slag CementSpecification C989.4.1.5 Hydraulic CementSpecification C1157.4.1.6 Silica FumeSpecification C1240.4.1.7 Hydrated LimeSpecification C207.4.2 AggregatesAggregates shall conform to the following specifications:4.
22、2.1 Normal Weight AggregatesSpecification C33.4.2.2 Lightweight AggregatesSpecification C330 or C331.4.3 Air-Entraining AdmixturesSpecification C260.4.4 Concrete AdmixturesSpecification C494/C494M.4.5 Coloring PigmentsSpecification C979.4.6 Reinforcement FibersSpecification C1116/C1116M.4.7 Other Co
23、nstituents:4.7.1 Other constituent materials shall be shown by test of experience or history of performance under equivalent conditionsnot to be detrimental to the durability of the adhered manufactured stone masonry veneer unit, or adhered manufactured stonemasonry veneer construction, or both.5. C
24、ompressive Strength5.1 From each manufacturing location, obtain representative samples from standard production of each concrete mix used forunits in accordance with 5.2.5.1.1 Sample and test the concrete mixes used for units no more than twelve months prior to production of units. More frequenttest
25、ing shall be required if there is any change in the manufacturing process including changes in cementitious materials or theirsources, aggregates or their sources, water-cementitious materials ratio, mix design, manufacturing process or curing. This doesnot include producing units of varying shapes,
26、 configurations or sizes of units.NOTE 2It is common practice to use the same mix design to produce a wide variety of adhered manufactured stone masonry veneer unit shapes, sizes,and configurations. This standard only requires the evaluation of the compressive strength of each mix design, not each u
27、nit configuration produced bya common mix design.C1670/C1670M 1525.2 Sample the concrete mix at the manufacturing facility from standard production mix. Form compressive strength andabsorption specimens in accordance with Practice C31/C31M; except that the time requirements for transportation do not
28、 applywhen specimens are shipped to the testing laboratory.5.2.1 For compressive strength testing, prepare five 4-in. diameter by 8 in. 100 mm by 200 mm cylinders and test inaccordance with 5.3. Do not disturb the curing cylinders for a minimum of 48 hours after casting. De-mold them at an age of se
29、vendays.5.3 Test specimens at an age of 28 days in accordance with Test Method C39/C39M.5.4 The average compressive strength of five specimens shall be a minimum of 2100 psi 15 MPa with no individual specimenhaving a measured compressive strength less than 1800 psi 12 MPa.6. Freeze-Thaw Durability6.
30、1 From each manufacturing location, obtain representative samples from standard production of each concrete mix used forunits in accordance with 6.2.6.1.1 Sample and test the concrete mixes used for units no more than twelve months prior to production of units. More frequenttesting shall be required
31、 if there is any change in the manufacturing process including changes in cementitious materials or theirsources, aggregates or their sources, water-cementitious materials ratio, mix design, manufacturing process or curing. This doesnot include producing units of varying shapes, configurations or si
32、zes of units.6.2 Sample the concrete mix at the manufacturing facility from standard production mix in accordance with Practice C31/C31Mexcept that the time requirements for transportation do not apply when specimens are shipped to the testing laboratory.6.2.1 For freeze/thaw durability testing, pre
33、pare five 3 in. by 3 in. by 11 in. 75 mm by 75 mm by 275 mm beams. The moldedbeams shall be de-molded 2432 hours after casting and shall be air cured for 28 days.6.3 Testing Requirements:6.3.1 No single specimen in a group of five specimens shall exhibit a mass loss greater than 1.5 % or show any fr
34、acturecompletely through the cross section when tested in accordance with Test Method C666/C666M, Procedure A, with the followingmodifications:6.3.1.1 The molded beams are subjected to 50 consecutive cycles of freezing and thawing.6.3.2 Determine mass loss in accordance with the following procedure:
35、6.3.2.1 Following immersion in water for a period of 48 hours, the initial specimen mass shall be measured. Excess surfacewater shall be immediately removed by blotting with damp cloth or fabric towel prior to mass measurement;6.3.2.2 Following the completion of 50 freeze thaw cycles in accordance w
36、ith Test Method C666/C666M, Procedure A, thespecimens shall be removed from the containers and excess surface water shall be removed by blotting with damp cloth or fabrictowel;6.3.2.3 The Percent Mass Loss (PWL) for each specimen shall be determined at 50 cycles and be calculated as follows:PWL beam
37、!, %5M0 2 M1!M0#3100where:PWL (beam) = percent mass loss of beamM0 = initial mass of beam following 48-hour saturationM1 = final mass of beam following 50 freeze/thaw cycles6.3.2.4 Any test specimen which fractures completely through the cross section into two or more discrete sections shall berecor
38、ded as a failure.6.3.3 In the case of specimen failure under 6.3.2.4, the failure mode must be reported in detail.NOTE 3Freeze-thaw testing is conducted on prism samples cast from representative concrete mix designs. While each manufacturer takes precautionsto ensure that the surface color is durabl
39、e, this freeze-thaw testing does not include a colored prism sample.7. Shear Bond7.1 From each manufacturing location, obtain a minimum of five (5) samples of units that are representative of the unit profilefrom which they are selected, using the same cementitious materials, aggregates, mix design,
40、 manufacturing process and curing.7.1.1 Sampling and testing should be performed at least annually to meet the requirements of this standard.7.2 Each unit tested shall develop a shear bond strength with the mortar substrate of not less than 50 psi 350 kPa when testedin accordance with Test Method C4
41、82 with the following modifications (listed in 7.2.1 through 7.2.5):7.2.1 Test a minimum of five (5) units at a minimum age of 28 days after manufacture.NOTE 4Test Method C482 requires curing for seven (7) days following fabrication of test specimens. It is acceptable to begin fabrication of shearbo
42、nd specimens 21 days following manufacture of the units.7.2.2 Use the mortar substrate for non-vitreous tile (water absorption greater than 7 %).C1670/C1670M 1537.2.3 Use a unit that can be cut into a sample with minimum dimensions of 2 14 in. by 2 14 in. 60 mm by 60 mm and maximumdimensions of 4 in
43、. by 4 in. 100 mm by 100 mm, with a thickness no greater than 2 58 in. 70 mm. This sample is to be cutcontaining the back pattern of the unit throughout the entire back face.7.2.4 Use a 12 in. 13 mm by 12 in. 13 mm steel bar (in place of the key) whose length shall be sufficient to reach the outered
44、ges of the sample unit across its length. The steel bar shall be placed adjacent and parallel to the sample mortar interface.7.2.5 Evaluate shear bond results of actual bonding surface of unit as manufactured. If the back surface of the unit used fortesting has a directional back pattern, this back
45、pattern shall be parallel to the direction of loading.8. Water Absorption and Density8.1 From each manufacturing location, obtain a minimum of three (3) samples of units that are representative of the unit profilefrom which they are selected, using the same cementitious materials, aggregates, mix de
46、sign, manufacturing process and curing.8.1.1 Sampling and testing should be performed at least annually to meet the requirements of this standard.8.2 Absorption:8.2.1 At a minimum age of 28 days after manufacture, average absorption of three units shall be tested in accordance with TestMethods C140.
47、 Units shall be permitted to be cut with a saw if the testing facility cannot accommodate a full-sized unit.8.3 Density:8.3.1 The saturated density of the units shall be determined from the weights obtained during absorption testing (in accordancewith Test Methods C140 and 8.2.1) using the following
48、 calculation:Saturated Density, lb/ft3,Ws!Ws 2 Wi! 362.4for inch-pound unitsSaturated Density, kg/m3,Ws!Ws 2 Wi! 31000for SI unitswhere:Ws = saturated weight of specimen, lb kgWI = immersed weight of specimen lb kg8.3.2 The weight per square foot of the unit shall be determined by multiplying the sa
49、turated density of the unit by the averagethickness, and shall not exceed 15 lb/ft2 73 kg/m2.9. Dimensional Tolerances9.1 From each manufacturing location, obtain a minimum of six (6) samples of units that are representative of the unit profilefrom which they are selected, using the same cementitious materials, aggregates, mix design, manufacturing process and curing.9.1.1 Sampling and testing should be performed at least annually to meet the requirements of this standard.9.2 Dimensions:9.2.1 Units shall h
