Specialist pick

Image 1 / 1

About this product

The HT 225A Concrete Hardness Tester (part number HT225A) is a rebound test hammer for the non-destructive testing of concrete structures, used to assess the compressive strength of in-place concrete. Conventional strength assessment requires cutting or coring samples; the rebound method tests large areas in a very short time at very low cost, and makes it straightforward to compare concrete quality between different sections of a structure.

The HT 225A Concrete Hardness Tester works by pressing the impact plunger against the concrete surface, which fires a percussion weight against the rear of the plunger and rebounds. The rebound depends on the hardness of the surface under test: the harder the surface, the higher the rebound. The maximum rebound is recorded on a scale, and that rebound number is converted to a compressive strength value using the conversion tables in the user manual. Because the conversion varies with test angle, values must be corrected for angles other than the standard horizontal direction. The HT 225A is comparable with the Schmidt Hammer Type N.

Specifications for the HT 225A Concrete Hardness Tester include a normal kinetic energy of 2.207J (0.225kgf.m), a 75mm punch advance for the impact hammer, an impact surface hardness of HRC59-63, a steel-anvil rating mean of 80 plus or minus 2, dimensions of 60 x 280mm and a weight of 1kg. The HT 225A Concrete Hardness Tester conforms to ISO 8045, ASTM C805, EN 12504-2, BS 1881:202, DIN 1048, NFP18-417 and UNI 9189. It is supplied by BAMR, South Africa's authorised distributor.

SADT

HT 225A Concrete Hardness Tester

SKU · HT225A

The HT 225A Concrete Test Hammer is designed specifically for the non-destructive testing of concrete structures. This testing method has considerable advantages over conventional methods of assessing the compressive strength of concrete, in that large areas can be tested in a very short time, at a very low cost.

Non-destructive testing method Large areas can be tested in a very short time, at a very low cost
Rebound measurement technology The rebound is dependent upon the hardness of the surface under test; the harder the surface the higher the rebound
Convertible results The rebound number can be converted to a compressive strength value via conversion tables contained in the user manual
Angular corrections Values must be corrected for angles other than the standard horizontal direction
Comparable with Schmidt Hammer Type N

Indicative price

Specialist-built quote, by close of business

Also available to buy online at GaugeIt, our online store.

Used by inspection teams in

RefiningMarineMiningBridge / civil

Decision guide

When to use the HT 225A Concrete Hardness Tester

The HT 225A is a mechanical rebound test hammer for non-destructive testing of concrete structures, comparable with the Schmidt Hammer Type N. Reach for it when you need to survey large areas of concrete quickly and cheaply and read off a rebound number to estimate compressive strength.

1
Cover large areas fast
The non-destructive method lets you test large areas in a short time at low cost, which suits broad acceptance checks across a structure.
2
Rebound converts to strength
The rebound number converts to a compressive strength value using the conversion tables in the manual, giving a usable estimate on the spot.
3
Meets recognised standards
It conforms to ISO 8045, ASTM C805, EN 12504-2, BS 1881:202 and others, so results stand up against the standard your job specifies.
4
Schmidt Type N equivalent
Being comparable with the Schmidt Hammer Type N means it slots into established workflows that already reference that instrument.

Consider instead

Lower-budget alternatives

HT225D Digital Concrete Test Hammer

Choose the digital version when you want automatic strength calculation and on-board data storage.

Elcometer 181 Mechanical Concrete Test Hammer

Consider this when you want an alternative mechanical hammer from the Elcometer range.

Not sure?

Ten minutes on a call with one of our specialists usually saves you from buying the wrong instrument.

Book a 10-minute call

Or , our product assistant, for an instant answer.

When to use this

Decision guide

When to use the HT 225A Concrete Hardness Tester

1
Cover large areas fast
The non-destructive method lets you test large areas in a short time at low cost, which suits broad acceptance checks across a structure.
2
Rebound converts to strength
The rebound number converts to a compressive strength value using the conversion tables in the manual, giving a usable estimate on the spot.
3
Meets recognised standards
It conforms to ISO 8045, ASTM C805, EN 12504-2, BS 1881:202 and others, so results stand up against the standard your job specifies.
4
Schmidt Type N equivalent
Being comparable with the Schmidt Hammer Type N means it slots into established workflows that already reference that instrument.

Consider instead