Rebound Hammer Testing According to ASTM C805 Malaysia
Rebound Hammer Testing According to ASTM C805 Malaysia
Introduction
ASTM C805 is one of the most widely recognised international standards for rebound hammer testing of concrete. It provides guidance on using a rebound hammer to evaluate the surface hardness of hardened concrete as part of a non-destructive testing (NDT) program.
The Langry RH-225A Concrete Test Hammer is suitable for engineers, contractors, consultants, and inspectors who perform routine concrete assessments in accordance with recognised testing procedures.
What Is ASTM C805?
ASTM C805 is a standard test method that describes how to use a rebound hammer to assess the surface hardness of hardened concrete.
The standard helps users:
Perform consistent testing
Improve repeatability
Reduce operator errors
Compare results from different locations
Support quality control inspections
It is important to note that ASTM C805 does not directly determine compressive strength. Instead, it provides a method for obtaining rebound values that can be correlated with concrete properties.
Why Follow ASTM C805?
Following recognised testing procedures helps ensure that inspection results are more reliable and consistent.
Benefits include:
Standardised testing methods
Better quality assurance
Greater confidence in inspection reports
Improved communication between contractors and consultants
Reduced variation between operators
Best Practices for Rebound Hammer Testing
To obtain reliable results:
Select a Suitable Test Area
Choose a smooth, clean, and solid concrete surface.
Avoid testing on:
Cracked concrete
Honeycombed surfaces
Loose concrete
Patch repairs
Perform Multiple Readings
Do not rely on a single impact.
Instead:
Take multiple rebound readings.
Remove abnormal values where appropriate.
Calculate the average rebound number.
This provides a more representative assessment of the concrete.
Consider Environmental Factors
Results may be influenced by:
Concrete age
Moisture content
Surface carbonation
Aggregate type
Testing direction
These factors should always be considered during interpretation.
Why the Langry RH-225A Is Suitable
The Langry RH-225A offers:
Stable mechanical performance
Consistent rebound measurements
Durable construction
Easy operation
Fast field inspections
Reliable daily performance
It is widely used for construction quality control, building inspections, infrastructure maintenance, and engineering surveys.
Typical Applications
The RH-225A is suitable for:
Building construction
Bridges
Roads
Industrial facilities
Warehouses
Precast concrete plants
Government infrastructure
Property inspections
Why Buy from MTM Precision?
MTM Precision supplies professional testing and measurement instruments trusted by engineers across Malaysia.
Our services include:
Genuine Langry products
Product consultation
Calibration services
Technical support
After-sales service
Fast nationwide delivery
We can also advise customers on proper testing procedures and equipment selection.
Contact MTM Precision Sdn Bhd
Website: www.mtmpre.com.my
Email: mtmpre@yahoo.com
WhatsApp: +6016-660 7346
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05 Aug 2026
