ASTM C127-24 PDF
Name in English:
St ASTM C127-24
Name in Russian:
Ст ASTM C127-24
Original standard ASTM C127-24 in PDF full version. Additional info + preview on request
Full title and description
St ASTM C127-24 — Standard Test Method for Relative Density (Specific Gravity) and Absorption of Coarse Aggregate. This standard describes laboratory procedures to determine the relative density (specific gravity) in its oven‑dry (OD), saturated‑surface‑dry (SSD) and apparent forms, and the water absorption of coarse aggregates used in concrete and other construction mixtures.
Abstract
ASTM C127-24 specifies procedures for measuring the mass relationships used to calculate relative density (specific gravity) and percent absorption of coarse aggregate particles. The method yields OD, SSD and apparent specific gravity values and a percent absorption based on changes in mass before and after specified soaking and drying conditions. Results are used in mix design, material accounting, and specification compliance for concrete and related products.
General information
- Status: Withdrawn / superseded (see notes below)
- Publication date: August 1, 2024 (designation C127-24)
- Publisher: ASTM International
- ICS / categories: 91.100.30 — Concrete and concrete products
- Edition / version: C127-24 (2024 edition)
- Number of pages: 6
Scope
This test method covers the determination of relative density (specific gravity) and absorption of coarse aggregates (nominal maximum size greater than the No. 4 (4.75 mm) sieve). It establishes the conditioning, weighing and computation steps to report OD, SSD and apparent specific gravities and percent absorption. The standard is not intended for lightweight aggregates covered by separate ASTM specifications.
Key topics and requirements
- Definitions and terminology for OD, SSD and apparent relative density (specific gravity).
- Sample preparation and minimum sample mass requirements for representative test portions.
- Conditioning procedures: oven‑drying, 24‑hour (or specified) soaking, and SSD surface‑drying techniques.
- Mass measurements: dry mass, SSD mass and submerged (buoyant) mass for calculations.
- Formulas and worked examples to calculate OD, SSD and apparent specific gravity and percent absorption.
- Notes on limitations (e.g., not for lightweight aggregates) and alternate conditioning methods (boiling, vacuum saturation) with expected differences in results.
- Reporting requirements and recommended precision/rounding for test results.
Typical use and users
Used by materials laboratories, concrete producers, quarry and aggregate suppliers, transportation and public works agencies, testing laboratories, and engineers for mix design, quality control, acceptance testing and material characterization. Typical users are civil/materials engineers, concrete technologists and QC technicians responsible for ensuring aggregate properties are properly accounted for in concrete proportioning and specifications.
Related standards
Commonly referenced ASTM standards include: C128 (fine aggregate specific gravity and absorption), C29/C29M (bulk density/voids in aggregate), C566 (moisture content of aggregates), C125 (terminology for concrete and aggregates), and C33 (specification for concrete aggregates). National and agency test methods addressing specific gravity/absorption or alternate conditioning are also used alongside C127 procedures.
Keywords
relative density; specific gravity; saturated‑surface‑dry (SSD); oven‑dry (OD); apparent specific gravity; absorption; coarse aggregate; aggregate density; mix design; QA/QC.
FAQ
Q: What is this standard?
A: ASTM C127-24 is the 2024 edition of the test method for determining the relative density (specific gravity) and water absorption of coarse aggregates used in concrete and similar products.
Q: What does it cover?
A: It covers laboratory procedures for conditioning aggregate, measuring required masses (dry, SSD and submerged), and calculating OD, SSD and apparent specific gravity and percent absorption. It applies to coarse aggregate larger than the No. 4 (4.75 mm) sieve and excludes lightweight aggregate groups covered by other standards.
Q: Who typically uses it?
A: Materials testing laboratories, concrete producers, aggregate suppliers, transportation agencies, and engineers involved in concrete mix design, quality control, acceptance testing and specification compliance.
Q: Is it current or superseded?
A: C127-24 was published/approved August 1, 2024. It has been superseded in later revisions of the C127 designation (see subsequent C127 revisions published after 2024). Users should confirm whether their project or agency requires the 2024 text or a later revision before relying on the procedure.
Q: Is it part of a series?
A: Yes — C127 is part of a suite of ASTM test methods and specifications for aggregates and concrete, including companion methods for fine aggregate (C128), bulk density/voids (C29/C29M) and other aggregate characterization standards.
Q: What are the key keywords?
A: Relative density, specific gravity, absorption, SSD, oven‑dry, apparent specific gravity, coarse aggregate, mix design, aggregate testing.