ASTM C207-91(1997)
Historical Standard: ASTM C207-91(1997) Standard Specification for Hydrated Lime for Masonry Purposes
SUPERSEDED (see Active link, below)
ASTM C207
1. Scope
1.1 This specification covers four types of hydrated lime. Types N and S are suitable for use in mortar, in scratch and brown coats of cement plaster, for stucco, and for addition to portland-cement concrete. Types NA and SA are air-entrained hydrated limes that are suitable for use in any of the above uses where the inherent properties of lime and air-entrainment are desired. The four types of lime sold under this specification shall be designated as follows:
1.1.1 Type N- Normal hydrated lime for masonry purposes.
1.1.2 Type S- Special hydrated lime for masonry purposes.
1.1.3 Type NA- Normal air-entraining hydrated lime for masonry purposes.
1.1.4 Type SA- Special air-entraining hydrated lime for masonry purposes.
Note 1-Type S, special hydrated lime, and Type SA, special air-entraining hydrated lime, are differentiated from Type N, normal hydrated lime, and Type NA, normal air-entraining hydrated lime, principally by their ability to develop high, early plasticity and higher water retentively, and by a limitation on their unhydrated oxide content. Note 2-For normal (Type N) and special (Type S) finishing hydrated lime, refer to Specification C206. Note 3-Some building codes prohibit the use of air-entraining materials in mortar, because of the accompanying reduction in bond and compressive strength. Where increased freeze-thaw resistance is important, air-entraining may be beneficial. Air-entraining lime should not be used as a finishing lime.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
C25 Test Methods for Chemical Analysis of Limestone, Quicklime, and Hydrated Lime
C50 Practice for Sampling, Sample Preparation, Packaging, and Marking of Lime and Limestone Products
C110 Test Methods for Physical Testing of Quicklime, Hydrated Lime, and Limestone
C206 Specification for Finishing Hydrated Lime
C226 Specification for Air-Entraining Additions for Use in the Manufacture of Air-Entraining Hydraulic Cement
C778 Specification for Sand
C1489 Specification for Lime Putty for Structural Purposes
Keywords
hydrated lime; masonry; mortar; plasticity; popping and pitting; residue; stucco; Type N; Type NA; Type S; Type SA; unhydrated oxides; water retention; air entraining; Cement materials/applications--specifications; Hydrated lime--specifications; Masonry mortar and grout--specifications;
ICS Code
ICS Number Code 91.100.10 (Cement. Gypsum. Lime. Mortar)
DOI: 10.1520/C0207-91R97
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