ISO 1920-6:2019 PDF

Testing of concrete — Part 6: Sampling, preparing and testing of concrete cores

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Title (English):

ISO 1920-6:2019

Testing of concrete — Part 6: Sampling, preparing and testing of concrete cores

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 7
Publication date:: October 11, 2019
Edition:: ISO IS 1920 edition 2 version 1
ICS:: 91.100.30

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Description (English):

This document specifies a method for taking cores from hardened concrete, their examination, preparation for testing and determination of compressive strength. This document does not give guidance on the decision to drill cores or on the locations for drilling and does not provide procedures for interpreting the core strength results. It is recommended that before coring, full agreement should be reached by all parties on the need for core testing and how the results should be interpreted.

Technical details

Technical committee: ISO/TC 71/SC 1 - Test methods for concrete
SKU: ISO 1920-6:2019

Abstract

Overview

ISO 1920-6:2019 - Testing of concrete - Part 6: Sampling, preparing and testing of concrete cores - specifies a standardized method for taking cores from hardened concrete, examining and preparing those cores, and determining their compressive strength. The standard covers core drilling, specimen dimensions, end preparation and compression testing requirements, but does not prescribe where to drill or how to interpret core results. It recommends that all parties agree on the need for coring and interpretation before testing.

Key topics and technical requirements

Scope and limits
- Method for sampling, preparation and compressive testing of concrete cores.
- Does not advise on drilling locations or result interpretation.
Apparatus
- Core drill with diamond-impregnated bit; drilling rig must be rigidly anchored.
- Compression testing machine with load accuracy ±1.0% and annual calibration.
- Platens hardness ≥ 550 HV; auxiliary platen thickness ≥ 23 mm; surface roughness Ra 0.4–3.2 µm.
- Balance accurate to 0.1% of specimen mass; callipers to ±0.01 mm.
Taking cores
- Avoid joints, edges and reinforcement where possible; prefer compression zones.
- Typical core diameters: 100 mm, 125 mm or 150 mm (±10 mm); diameter should be >3× maximum aggregate size (100 mm preferred for max aggregate ≤19 mm).
- Length and diameter selection depend on comparison basis (cube or cylinder strength).
Length-to-diameter (l/d) ratios
- For comparison to cylinder strength: 2.0 (±5%).
- For comparison to cube strength: 1.0 (±5%).
- Conversion methods are permitted when l/d

Related standards

Other ISO standards

Overview

Key topics and technical requirements

Scope and limits
- Method for sampling, preparation and compressive testing of concrete cores.
- Does not advise on drilling locations or result interpretation.
Apparatus
- Core drill with diamond-impregnated bit; drilling rig must be rigidly anchored.
- Compression testing machine with load accuracy ±1.0% and annual calibration.
- Platens hardness ≥ 550 HV; auxiliary platen thickness ≥ 23 mm; surface roughness Ra 0.4–3.2 µm.
- Balance accurate to 0.1% of specimen mass; callipers to ±0.01 mm.
Taking cores
- Avoid joints, edges and reinforcement where possible; prefer compression zones.
- Typical core diameters: 100 mm, 125 mm or 150 mm (±10 mm); diameter should be >3× maximum aggregate size (100 mm preferred for max aggregate ≤19 mm).
- Length and diameter selection depend on comparison basis (cube or cylinder strength).
Length-to-diameter (l/d) ratios
- For comparison to cylinder strength: 2.0 (±5%).
- For comparison to cube strength: 1.0 (±5%).
- Conversion methods are permitted when l/d

ISO 1920-6:2019 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

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Abstract

Overview

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