ASTM C821-14

Standard Specification for Lime for Use with Pozzolans

ABSTRACT
This specification covers all types of commercial hydrated lime such as: high-calcium, magnesium, or dolomitic-hydrated lime. This lime is used with pozzolans. The lime shall conform to the required physical and chemical limits: chemical factor, blaine fineness, and pozzolanic receptivity index. The following test methods shall be done: determination of calcium oxide, magnesium oxide, and carbon dioxide; calculation of chemical factor; blaine fineness; pozzolanic receptivity index; lime-pozzolan strength; and lime-pozzolan-aggregate strength and freeze-thaw resistance.
SCOPE
1.1 This specification covers all types of commercial hydrated lime such as: high-calcium, magnesium, or dolomitic-hydrated lime. By-product limes and slaked quick limes in dry, wet, or slurried form are also included.  
1.2 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.  
1.3 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-2014
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C07 - Lime and Limestone
• Drafting Committee: C07.02 - Specifications and Guidelines

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:C821 −14
Standard Specification for
1
Lime for Use with Pozzolans
This standard is issued under the fixed designation C821; 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* 3. Terminology
1.1 This specification covers all types of commercial hy- 3.1 Definitions:
drated lime such as: high-calcium, magnesium, or dolomitic- 3.1.1 Fordefinitionsoftermsusedinthisspecification,refer
hydrated lime. By-product limes and slaked quick limes in dry, to Terminology C51.
wet, or slurried form are also included.
3.2 Definitions of Terms Specific to This Standard:
1.2 The values stated in inch-pound units are to be regarded 3.2.1 chemical factor, n—a numerical value of the active
as standard. The values given in parentheses are mathematical constituents in the hydrated lime that react chemically with a
conversions to SI units that are provided for information only pozzolan. The value is based on the combined calcium oxide
and are not considered standard. equivalents of free calcium oxide, calcium hydroxide, and
magnesium oxide. Calcium carbonate and magnesium hydrox-
1.3 This standard does not purport to address all of the
ideareexcluded,sincethesecompoundshavebeenfoundtobe
safety concerns, if any, associated with its use. It is the
nonreactive.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 3.2.2 pozzolanic receptivity index, n—a performance factor
bility of regulatory limitations prior to use. incorporating both chemical quality and fineness, determined
by Eq 3.
2. Referenced Documents
4. Chemical and Physical Requirements
2
2.1 ASTM Standards:
4.1 The lime shall conform to the requirements listed in
C25 Test Methods for Chemical Analysis of Limestone,
Table 1, except as noted in Section 5.
Quicklime, and Hydrated Lime
C50 Practice for Sampling, Sample Preparation, Packaging,
5. Performance Requirements
and Marking of Lime and Limestone Products
5.1 If the chemical factor, Blaine fineness, or pozzolanic
C51 Terminology Relating to Lime and Limestone (as used
receptivity index is below the limits given in Table 1, the lime
by the Industry)
shall be required to meet the applicable performance require-
C204 Test Methods for Fineness of Hydraulic Cement by
ments listed in Table 2. Where such lime complies with the
Air-Permeability Apparatus
limitslistedinTable2,itshallbeconsideredacceptableforuse
C593 Specification for FlyAsh and Other Pozzolans for Use
with pozzolans. However, it may be necessary to increase the
With Lime for Soil Stabilization
lime content in the lime-pozzolan mixtures in order to meet
C1271 Test Method for X-ray Spectrometric Analysis of
minimum design criteria.
Lime and Limestone
C1301 Test Method for Major and Trace Elements in Lime-
6. Test Methods
stone and Lime by Inductively Coupled Plasma-Atomic
6.1 Chemical Factor:
Emission Spectroscopy (ICP) and Atomic Absorption
6.1.1 Determinecalciumoxide(CaO)andmagnesiumoxide
(AA)
(MgO) contents in accordance with Methods C25, C1271,or
C1301. Determine the carbon dioxide (CO ) content in accor-
2
1 dancewithMethodC25.Whenthemagnesiumoxidecontentis
This specification is under the jurisdiction of ASTM Committee C07 on Lime
and Limestone and is the direct responsibility of Subcommittee C07.02 on
greater than 5 %, determine the peak height of magnesium
Specifications and Guidelines.
oxide and magnesium hydroxide using standard X-ray diffrac-
Current edition approved July 1, 2014. Published July 2014. Originally approved
tion procedures and calculate the ratio (r) of magnesium oxide
in 1975. Last previous edition approved in 2009 as C821 – 09. DOI: 10.1520/
to hydroxide using Eq 1. When the magnesium oxide is less
C0821-14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
than 5 %, the value of r shall be 0.30.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C821−14
TABLE 1 Chemical and Physical Requirements
must result in a firm bed as described in Test Method C204.
Chemical factor, min 50 Use the specific gravity of the lime and finally chosen weight
2
Blaine fineness, min, cm /g 10 000
to determine the porosity of the bed in accordance with Eq 2 of
Pozzolanic receptivity index, min 100
...

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. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C821 − 09 C821 − 14
Standard Specification for
1
Lime for Use with Pozzolans
This standard is issued under the fixed designation C821; 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*
1.1 This specification covers all types of commercial hydrated lime such as: high-calcium, magnesium, or dolomitic-hydrated
lime. By-product limes and slaked quick limes in dry, wet, or slurried form are also included.
1.2 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.
1.3 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.
2. Referenced Documents
2
2.1 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
C51 Terminology Relating to Lime and Limestone (as used by the Industry)
C204 Test Methods for Fineness of Hydraulic Cement by Air-Permeability Apparatus
C593 Specification for Fly Ash and Other Pozzolans for Use With Lime for Soil Stabilization
C1271 Test Method for X-ray Spectrometric Analysis of Lime and Limestone
C1301 Test Method for Major and Trace Elements in Limestone and Lime by Inductively Coupled Plasma-Atomic Emission
Spectroscopy (ICP) and Atomic Absorption (AA)
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this specification, refer to Terminology C51.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 chemical factor, n—a numerical value of the active constituents in the hydrated lime that react chemically with a pozzolan.
The value is based on the combined calcium oxide equivalents of free calcium oxide, calcium hydroxide, and magnesium oxide.
Calcium carbonate and magnesium hydroxide are excluded, since these compounds have been found to be nonreactive.
3.2.2 pozzolanic receptivity index, n—a performance factor incorporating both chemical quality and fineness, determined by Eq
3.
4. Chemical and Physical Requirements
4.1 The lime shall conform to the requirements listed in Table 1, except as noted in Section 5.
5. Performance Requirements
5.1 If the chemical factor, Blaine fineness, or pozzolanic receptivity index is below the limits given in Table 1, the lime shall
be required to meet the applicable performance requirements listed in Table 2. Where such lime complies with the limits listed in
1
This specification is under the jurisdiction of ASTM Committee C07 on Lime and Limestone and is the direct responsibility of Subcommittee C07.02 on Specifications
and Guidelines.
Current edition approved June 1, 2009July 1, 2014. Published July 2009July 2014. Originally approved in 1975. Last previous edition approved in 20002009 as
C821 – 78C821 – 09.(2000). DOI: 10.1520/C0821-09.10.1520/C0821-14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C821 − 14
TABLE 1 Chemical and Physical Requirements
Chemical factor, min 50
2
Blaine fineness, min, cm /g 10 000
Pozzolanic receptivity index, min 100
TABLE 2 Performance Requirements
Plastic Compositions:
Lime-pozzolan strength, min, psi (MPa) 600 (4.13)
Nonplastic Compositions:
Lime-pozzolan-aggregate strength, min, psi (MPa) 400 (2.76)
Vacuum saturation strength, min, psi (MPa) 400 (2.8)
Table 2, it shall be considered acceptable for use with pozzolans. However, it may be necessary to increase the lime content in the
lime-pozzolan mixtures in order to meet minimum design criteria.
6. Test Methods
6.1 Chemical Factor:
6.1.1 Determine calcium oxide (CaO), magnesium oxide (MgO), and (CaO)
...