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ASTM C1660-09

(Specification)

Standard Specification for Thin-bed Mortar for Autoclaved Aerated Concrete (AAC) Masonry

Standard Specification for Thin-bed Mortar for Autoclaved Aerated Concrete (AAC) Masonry

ABSTRACT
This specification addresses the material and performance requirements of thin-bed mortar used in the construction of autoclaved aerated concrete (AAC) masonry. Materials used in the preparation of the thin-bed mortar shall conform to the requirements specified in referenced ASTM documents itemized herein. These materials include masonry cement, fine aggregates, Portland cement, hydrated lime, blended hydraulic cement, hydraulic cement, mortar cement, rapid hardening hydraulic cement, and adhesives. Properly sampled test specimens shall adhere to the minimum splitting tensile strength requirements specified for its class.
SCOPE
1.1 This specification applies to thin-bed mortar for autoclaved aerated concrete (AAC) masonry.
1.2 The testing laboratory performing these test methods shall be evaluated in accordance with Practice C 1093.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
30-Jun-2009
ICS
91.100.10 - Cement. Gypsum. Lime. Mortar
Technical Committee
C12 - Mortars and Grouts for Unit Masonry
Drafting Committee
C12.03 - Specifications for Mortars
Current Stage
Ref Project

Relations

Replaced By
ASTM C1660-10 - Standard Specification for Thin-bed Mortar for Autoclaved Aerated Concrete (AAC) Masonry
Effective Date
01-Jun-2010
Referred By
ASTM C1692-18 - Standard Practice for Construction and Testing of Autoclaved Aerated Concrete (AAC) Masonry
Effective Date
01-Jul-2009

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ASTM C1660-09 - Standard Specification for Thin-bed Mortar for Autoclaved Aerated Concrete (AAC) MasonryASTM C1660-09 - Standard Specification for Thin-bed Mortar for Autoclaved Aerated Concrete (AAC) Masonry
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ASTM C1660-09 - Standard Specification for Thin-bed Mortar for Autoclaved Aerated Concrete (AAC) Masonry
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C1660 – 09
Standard Specification for
Thin-bed Mortar for Autoclaved Aerated Concrete (AAC)
Masonry
This standard is issued under the fixed designation C1660; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope C1384 Specification for Admixtures for Masonry Mortars
C1386 Specification for Precast Autoclaved Aerated Con-
1.1 This specification applies to thin-bed mortar for auto-
crete (AAC) Wall Construction Units
claved aerated concrete (AAC) masonry.
C1452 Specification for Reinforced Autoclaved Aerated
1.2 The testing laboratory performing these test methods
Concrete Elements
shall be evaluated in accordance with Practice C1093.
C1555 Practice for Autoclaved Aerated Concrete Masonry
1.3 The values stated in inch-pound units are to be regarded
C1600/C1600M Specification for Rapid Hardening Hy-
as standard. The values given in parentheses are mathematical
draulic Cement
conversions to SI units that are provided for information only
and are not considered standard.
3. Terminology
1.4 This standard may involve hazardous materials, opera-
3.1 Definitions—For definitions of terms used in this speci-
tions, and equipment. This standard does not purport to
fication, refer to Terminologies C1180 and C1232, and Speci-
address all of the safety concerns, if any, associated with its
fication C1386.
use. It is the responsibility of the user of this standard to
3.2 Definitions of Terms Specific to This Standard:
establish appropriate safety and health practices and deter-
3.2.1 thin-bed mortar—preblended mortar for use in con-
mine the applicability of regulatory limitations prior to use.
struction ofAAC unit masonry whose joints are approximately
1 1
2. Referenced Documents ⁄16 to ⁄8-in. (2 to 3-mm) thick.
2.1 ASTM Standards:
4. Significance and Use
C91 Specification for Masonry Cement
4.1 This specification applies to the thin-bed mortar mate-
C144 Specification for Aggregate for Masonry Mortar
rials used in the construction of AAC masonry. It references
C150 Specification for Portland Cement
directly the AAC materials standards under the jurisdiction of
C207 Specification for Hydrated Lime for Masonry Pur-
ASTM Committees C15 and C27 including Specifications
poses
C1386, C1452, and C1555.
C595 Specification for Blended Hydraulic Cements
C1006 Test Method for Splitting Tensile Strength of Ma-
5. Materials
sonry Units
5.1 Materials used in the preparation of thin-bed mortar for
C1093 Practice for Accreditation of Testing Agencies for
AAC masonry shall conform to the requirements specified.
Masonry
5.1.1 Masonry cement shall conform to Specification C91.
C1157 Performance Specification for Hydraulic Cement
5.1.2 Fine aggregates shall conform to Specification C144
C1180 Terminology of Mortar and Grout for Unit Masonry
with the exception of the gradation requirements, which shall
C1232 Terminology of Masonry
not apply. The maximum aggregate size shall be that passing a
C1329 Specification for Mortar Cement
#6 standard sieve.
5.1.3 Portland cement shall conform to Specification C150.
This specification is under the jurisdiction of ASTM Committee C12 on
5.1.4 Hydrated lime shall conform to Specification C207.
Mortars and Grouts for Unit Masonry and is the direct responsibility of Subcom-
Type N lime is permitted if shown by test or performance
mittee C12.03 on Specifications for Mortars.
record not to be detrimental to soundness of mortar.
Current edition approved July 1, 2009. Published August 2009. DOI: 10.1520/
C1660-09. 5.1.5 Blended hydraulic cement shall conform to Specifica-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
tion C595.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.1.6 Hydraulic cement shall conform to Specification
Standards volume information, refer to the standard’s Document Summary page on
C1157.
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
C1660 – 09
5.1.7 Mortar cement shall conform to Specification C1329. between unit specimens and mortar. Clean excess mortar from
5.1.8 Rapid hardening hydraulic cement shall conform to the joint around the perimeter of the joined specimen to
Specification C1600/C1600M. produce a smooth, uniform surface across the joint. Cure the
5.1.9 Adhesives—At the maximum recommended dosage, specimens in air at a temperature of 75 6 15°F (24 6 8°C) and
the adhesive admixture shall add not more than 65 ppm a relative humidity of less than 80 % for at least 28 days, or for
(0.0065 %) water soluble chloride, or 90 ppm (0.0090 %) a time prescribed by the mortar manufacturer, in a stacked
acid-solublechloridetothemortar’soverallchloridecontentas position.
determined by testing of the reference and admixed mortars in
(2) Measure each cured test specimen to obtain an average
accordance with the Soluble Chloride Content section of
cross-sectiona
...

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ABSTRACT
This specification pertains to admixtures for masonry mortars. Admixtures are substances other than the prescribed materials of water, aggregate, and cementitious materials that are used to improve one or more of the recognized desirable properties of conventional masonry mortar. Admixtures are classified by their effect on the performance characteristics of conventional masonry mortars. Admixed mortars are classified by their modified properties, as compared to a reference mortar. The following classifications are recognized: bond enhancer, workability enhancer, set accelerator, set retarder, and water repellent. The materials to be used include Portland cement, hydraulic cement, blended hydraulic cement, masonry cement, mortar cement, lime, and sand. Different test methods shall be implemented in order to determine the following properties: soluble chloride content, compressive strength, water retention, air content of plastic mortar, board life, time of setting, flexural bond strength, and rate of water absorption.
SCOPE
1.1 This specification pertains to admixtures for masonry mortars. Admixtures are substances other than Specification C270 prescribed materials of water, aggregate, and cementitious materials that are used to improve one or more of the recognized desirable properties of conventional masonry mortar.  
1.2 This specification does not cover coloring pigments.
Note 1: Information on coloring pigments can be found in Specification C979/C979M.  
1.3 This specification does not cover additives that are added to the cementitious materials during the manufacture of the cementitious materials.  
1.4 Acceptance of an admixture is based on its performance in an admixed mortar. Acceptance of the admixed masonry mortar is based on attainment of performance either equivalent to that required for conventional mortar or improved performance of one or more indicated properties, while maintaining required performance levels for other properties.  
1.5 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.  
1.6 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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This specification covers unit masonry mortars whose material and design requirements are governed by a referenced ASTM document stated herein, but are preblended dry in a factory instead of produced from individual raw materials delivered to the job-site. Because field sampling, testing, directly comparable test results, packaging, and traceability of ingredients of preblended dry mortar mix differ from job site mixed mortars, this specification particularly addresses these issues, along with the tight control of ingredient ratios possible with preblended dry mortars.
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1.1 This specification covers masonry mortars whose materials and design requirements are governed by Specification C270 but are preblended dry in a factory instead of produced from individual raw materials delivered to the job-site.  
1.2 The field-sampling, testing, directly comparable test results, packaging, and the traceability of ingredients of preblended dry mortar mix differ from job site mixed mortars and this standard specifically addresses these issues. The tight control of ingredient ratios possible with preblended dry mortar is also covered.  
1.3 The text of this specification refers to notes and footnotes, which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered the requirements of the standard.  
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.)  
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SIGNIFICANCE AND USE
5.1 During preconstruction and construction evaluations, use of these test methods establishes specific and overall performance characteristics for the mortar system.  
5.2 Preconstruction testing of mortars prebatched by weight provides information for the selection of the individual mortar system best suited for the masonry to be constructed. The recommended tests and their significance are as follows:  
5.2.1 Consistency determinations by cone penetration (Annex A1) allow gaging the water additions for all mortars included in the preconstruction test series. Even if the mortar consistency as measured at the construction site is at a different penetration value than those measured during the preconstruction tests, the cone preparation test serves to standardize water additions for mortars being considered as alternatives before construction. Additional testing of mortar water content-consistency relationships (Annex A4) will allow relating these two factors to batch-to-batch variations at the construction site.  
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5.2.3 Mortar water-content determinations (Annex A4) allow measurement of the water content of the mortar mixture. Mortars prebatched using moist masonry sand may be mathematically analyzed for mortar water content; however, this test, when used for preconstruction evaluation, establishes the effectiveness of the test method and serves as the control or base for tests performed at the construction site.  
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1.1 These test methods cover procedures for the sampling and testing of mortars for composition and for their plastic and hardened properties, either before or during their actual use in construction.
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1.3 Construction Evaluation—Use of these methods in the field provide a means for quality assurance of field-mixed mortar. They include methods for verifying the mortar mix proportions, comparing test results for field mortars to preconstruction testing, and determining batch-to-batch uniformity of the mortar.  
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1.1 This specification covers mortar for the repair of masonry constructed with methods and materials that pre-date the origination of current standards of construction. The mortar may be used for non-structural purposes such as repointing of the masonry, or for structural purposes such as, but not restricted to, re-construction or repair of mortar joints that contribute to the structural integrity of the masonry.  
1.2 Masonry includes the following units laid in mortar: (1) cast stone, (2) clay brick and tile, (3) concrete masonry, (4) natural stone, (5) terra cotta, and (6) calcium silicate.  
1.3 This specification may be used to pre-qualify mortar for a project.  
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1.5 This specification provides a basis for the design of an appropriate mortar formulation based upon performance, material and aesthetic requirements. Use of this specification requires a thorough understanding of the function, maintenance, and repair requirements for the preservation and continued performance of the masonry assembly in the context of the assembly’s structure, water management, and long-term performance.  
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4.1 This test method provides a laboratory procedure for determining the relative water absorption properties over time of mortars used for masonry construction. Because the specimens are made under laboratory conditions and do not take into account the effect of the masonry substrate or field mixing procedures, this method is not intended for field use. Data generated from this test method may be useful for determining the relative effectiveness of water repellent admixtures or the effect of other admixtures or mortar components on the water repellency of a mortar. However, use caution in interpreting the results. While the resistance of masonry to water penetration may be related to the water absorption of the mortar, it also depends on other factors, such as the workmanship, extent of bond, and the properties of the masonry units and mortar.
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1.1 This test method covers a standardized laboratory procedure for determining the relative water absorption by capillary uptake (wicking) characteristics of masonry mortars. This test method is not applicable for determining the effectiveness of water repellent coatings.  
1.2 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.  
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1.3.1 Inch-pound units are given in parentheses for temperature specification and are for information only.  
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1.1 This terminology covers terms, definitions of terms, descriptions of terms, nomenclature, and explanations of abbreviations, acronyms, and symbols specifically associated with standards under the jurisdiction of ASTM Committee C12 on Mortars and Grouts for Unit Masonry.  
1.2 The definitions and descriptions of terms in this terminology pertain to Test Methods C780, C1019, C1148, C1324, and C1403; Specifications C144, C270, C404, C476, C887, and C1384; Practice C946; and Guide C1586.  
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Standard Test Method for Examination and Analysis of Hardened Masonry Mortar

SIGNIFICANCE AND USE
4.1 This test method provides procedures for petrographic examination and chemical analysis of mortar for components of masonry mortar. These components may include portland cement, hydrated calcitic or dolomitic lime, masonry cement, aggregates, and air.  
4.2 The test method consists of procedures and sub-procedures, each requiring a substantial degree of petrographic and chemical skills and relatively elaborate instrumentation.  
4.3 The chemical data considered together with results of petrographic examination of a mortar provide for calculation of component proportions and thus allow a determination of mortar composition as represented by Types M, N, S, and O in Table 1 (Proportion Specification Requirements) of Specification C270.  
4.4 Failure of a mortar to have the composition of any type as defined in Table 1 of Specification C270 does not necessarily mean that the mortar does not meet the requirements of Specification C270. The mortar may meet the alternative requirements of Table 2 (Property Specification Requirements) of Specification C270.  
4.5 The maleic acid method of analysis is not applicable for the analysis of mortar because it is greatly influenced by carbonation and does not provide for the determination of calcium.
SCOPE
1.1 This test method covers procedures for petrographic examination and chemical analysis of samples of masonry mortars. Based upon such examination and analysis, proportions of components in masonry mortars can be determined.
Note 1: This method is also applicable to hydraulic cement-based stucco and plaster. Some historic mortars may contain non-resolvable constituents that may interfere. However, significant information may be obtained by petrographic examinations.  
1.2 Interpretations and calculations of chemical results are dependent upon results of the petrographic examination. The use of the chemical results alone is contrary to the requirements of this test method.  
1.3 Procedures for sampling, petrographic examination, chemical analysis, and calculations of component proportions are given in the following sections:    
Section  
Sampling  
7  
Petrographic examination  
8  
Chemical analysis  
9  
Mortar proportion calculations  
10  
Report  
11  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 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 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 responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM C1019-20(Test Method)
Standard Test Method for Sampling and Testing Grout for Masonry

SIGNIFICANCE AND USE
3.1 Grout used in masonry is a fluid mixture of cementitious materials and aggregate with a high water content for ease of placement.  
3.1.1 During construction, grout is placed within or between absorptive masonry units. Excess water must be removed from grout specimens in order to provide compressive strength test results more nearly indicative of the grout strength in the wall. In this test method, molds are made from masonry units having the same absorption and moisture content characteristics as those being used in the construction.  
3.2 This test method is used to either help select grout proportions by comparing test values or as a quality control test for uniformity of grout preparation during construction.  
3.3 The physical exposure condition and curing of the grout are not exactly reproduced, but this test method does subject the grout specimens to absorption conditions similar to those experienced by grout in the wall.
Note 2: Test results of grout specimens taken from a wall should not be compared to test results obtained with this test method.
SCOPE
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ASTM C1586-20(Guide)
Standard Guide for Quality Assurance of Mortars

SIGNIFICANCE AND USE
3.1 This document is intended to provide guidance and clarification to designers, specifiers, inspectors, testing agencies, producers, and users in specifying and evaluating masonry mortar.  
3.2 Users of documents Specification C270 and Test Method C780 often confuse and sometimes inadvertently misuse parts of the two documents when specifying or evaluating masonry mortar. This guide seeks to address specific items within Specification C270 and Test Method C780 to help promote their proper use and interpretation.
SCOPE
1.1 This document provides guidance regarding the proper use of Specification C270 and Test Method C780 for evaluating masonry mortar produced in the laboratory and at the construction site.  
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