ASTM C192/C192M-24 PDF

Full title and description

ASTM C192/C192M‑24 — Standard Practice for Making and Curing Concrete Test Specimens in the Laboratory. This practice describes prescribed procedures for molding, consolidating, finishing, demolding, and curing laboratory concrete test specimens (cylinders and beams/prisms) so that specimens used for laboratory testing are produced under controlled, repeatable conditions.

Abstract

Provides standardized laboratory procedures for preparation and curing of concrete test specimens (including recommended environmental conditions, consolidation by rodding or vibration, demolding times, and curing methods) to ensure that specimens used for strength, durability and other tests are made and stored under consistent, reproducible conditions. Intended to minimize variability introduced by specimen preparation in laboratory testing programs.

General information

• Status: Superseded by a subsequent 2025 update (ASTM C192/C192M‑25 / 25a listed as the more recent edition in commercial listings); C192/C192M‑24 remains a published historical edition.
• Publication date: October 2024 (published Oct 2024 in ASTM product listings).
• Publisher: ASTM International (American Society for Testing and Materials).
• ICS / categories: 91.100.30 — Concrete and concrete products.
• Edition / version: Designation C192/C192M‑24 (2024 edition). Note: later revisions (2025) are listed by some distributors as the current edition.
• Number of pages: 8 pages (short practice/technical note length).

Scope

This practice covers procedures for making and curing test specimens of concrete in the laboratory under accurately controlled materials and test conditions, using concrete that can be consolidated by rodding or vibration. It defines specimen types (typical cylinder and prism sizes), mixing and placing procedures appropriate for laboratory specimens, demolding and initial curing intervals, and recommended laboratory curing environments (for example, moist rooms or lime‑saturated water at prescribed temperatures).

Key topics and requirements

• Specimen types and dimensions commonly used (cylinders and beams/prisms) and preferred mold materials and tolerances.
• Controlled laboratory mixing, placing and consolidation methods (rodding or vibration) to reduce variability.
• Finishing, identification and handling procedures to avoid disturbance and segregation.
• Demolding times and recommended initial curing practices (timing before transfer to laboratory curing).
• Specified laboratory curing environments and temperature/humidity control to ensure repeatability (typical recommendation: specified controlled temperature and moist cure methods).
• Use of either SI or inch‑pound units as separate standard systems (values in each system treated independently).
• Planned editorial/technical change — work item to add a formal “Report” section to state required report information (under development per ASTM work item listings).

Typical use and users

Used by concrete testing laboratories, materials engineers, QC/QA personnel, research labs, concrete producers performing mix design and internal testing, transportation agencies and contractors. Typical applications include preparing standard specimens for compressive‑strength testing, durability testing, and comparative mixture evaluations conducted under laboratory conditions where specimen preparation must be tightly controlled.

Related standards

Closely associated ASTM standards include: C31/C31M (Practice for Making and Curing Concrete Test Specimens in the Field), C39/C39M (Test Method for Compressive Strength of Cylindrical Concrete Specimens), C617/C617M (Practice for capping cylinders), and other specimen‑preparation and testing practices. These documents are commonly used together in concrete testing programs so that specimens prepared under C192/C192M (laboratory) are tested per C39 and handled/capped per the appropriate practices.

Keywords

concrete, laboratory, specimen, cylinder, prism, molding, curing, demolding, consolidation, rodding, vibration, compressive strength, QC, C192

FAQ

Q: What is this standard?

A: ASTM C192/C192M‑24 is the ASTM practice that defines how to make and cure concrete test specimens in the laboratory so that laboratory test results (strength, durability, etc.) are reproducible and comparable.

Q: What does it cover?

A: It covers specimen types, laboratory mixing/placing/consolidation (rodding or vibration), finishing and identification, demolding times, and standardized laboratory curing environments and handling to reduce variability caused by specimen preparation.

Q: Who typically uses it?

A: Concrete testing laboratories, materials engineers, QC/QA personnel, contractors, concrete producers, and transportation agencies use this practice when specimens must be prepared under controlled laboratory conditions for testing (for example, prior to compressive strength testing per C39).

Q: Is it current or superseded?

A: The C192/C192M‑24 text was published in October 2024; commercial listings indicate that a subsequent 2025 revision (C192/C192M‑25/25a) is available and listed as the more recent edition. Users should confirm the required edition for contract or regulatory compliance and consider using the latest ASTM edition.

Q: Is it part of a series?

A: Yes — C192/C192M is part of the ASTM C09 committee’s suite of concrete testing practices and is commonly used alongside related standards such as C31/C31M (field specimen practice), C39/C39M (compressive strength test), and capping and end‑preparation practices like C617/C617M and C1231/C1231M.

Q: What are the key keywords?

A: Concrete specimen, laboratory curing, molding, demolding, consolidation, cylinder, prism, rodding, vibration, compressive strength, QC.