ASTM C5-24 PDF

Full title and description

ASTM C5-24 — Standard Specification for Quicklime for Structural Purposes. This specification establishes requirements and test methods for quicklime (including crushed, granular, ground, lump, pebble and pulverized forms) intended for use in structural applications; it includes chemical composition limits, slaking and aging guidance, and acceptance testing requirements.

Abstract

This standard covers classes of quicklime used for structural purposes and specifies chemical requirements, handling (including slaking and aging), and test procedures to determine conformity (chemical analysis, plasticity and residue tests). The standard is written with SI units as standard and includes safety and applicability notes for users.

General information

• Status: Active.
• Publication date: C5-24 (last updated / published in 2024 — recorded update date June 10, 2024).
• Publisher: ASTM International.
• ICS / categories: Building materials / lime and related materials; ICS code historically associated with lime standards: 91.100.10.
• Edition / version: Designation C5-24 (current 2024 edition).
• Number of pages: 3 pages.

Scope

The scope of ASTM C5-24 covers all classes of quicklime intended for structural use (crushed, granular, ground, lump, pebble and pulverized). It defines required chemical composition limits, prescribes slaking and aging procedures for producing lime putty, and specifies test methods for chemical requirements, plasticity and residue to verify conformance. The standard notes unit conventions (SI as standard) and reminds users to observe applicable safety, health and environmental practices.

Key topics and requirements

• Definitions and classification of quicklime types for structural use (crushed, granular, ground, lump, pebble, pulverized).
• Chemical composition requirements and acceptable limits for quicklime used in structural applications.
• Procedures and recommendations for slaking, aging and storage of lime putty produced from quicklime.
• Specified test methods for verification: chemical analysis, plasticity/residue tests and other acceptance tests.
• Unit conventions (SI units as standard) and notes on safety and regulatory applicability.

Typical use and users

Users include quicklime manufacturers and suppliers, construction materials specifiers, structural and restoration engineers, materials testing laboratories, and contractors involved in lime-based mortars, plastering and historic building conservation. The standard is referenced when purchasing or specifying quicklime for structural or building-related applications to ensure consistent chemical and performance characteristics.

Related standards

Previous and related ASTM designations and historical editions of the quicklime specification include earlier C5 editions (for example C5-10 and C5-03). ASTM C5 is developed under Committee C07 (Subcommittee C07.02) and appears in the Book of Standards Volume covering related materials. For electrical-steel coating classifications that reuse "C5" as a coating class the context is different; ensure references are to C5 (quicklime) where relevant.

Keywords

quicklime; structural lime; lime putty; slaking; chemical composition; plasticity test; residue test; ASTM C5; building materials; lime specification.

FAQ

Q: What is this standard?

A: ASTM C5-24 is the 2024 edition of the ASTM specification that sets requirements and test methods for quicklime intended for structural applications (types include crushed, granular, ground, lump, pebble and pulverized quicklime).

Q: What does it cover?

A: It covers composition limits, handling (slaking and aging), production of lime putty, and specified laboratory tests (chemical, plasticity, residue) to verify conformance for structural use; SI units are the standard units in the document.

Q: Who typically uses it?

A: Quicklime producers and suppliers, procurement/specification engineers, testing laboratories, contractors and conservators specifying or verifying lime for structural or building applications.

Q: Is it current or superseded?

A: As published on ASTM's catalog, C5-24 is the current (active) edition as of the recorded update in 2024 (listed update date June 10, 2024). Users should check ASTM for any amendments or revisions after that date.

Q: Is it part of a series?

A: Yes — C5 is the ASTM designation for the quicklime specification and has prior editions (for example C5-10, C5-03). It is developed under ASTM Committee C07 (Subcommittee C07.02) and appears in the Book of Standards volume for related materials.

Q: What are the key keywords?

A: Quicklime, lime putty, slaking, chemical composition, plasticity, residue, structural lime, ASTM C5.