Contest conducts aggregate testing that will assist our
customers with assessing the characteristics and quality of
aggregates for use
in concrete for construction.
These tests are conducted in our well-equipped laboratory by
trained, competent staff. Site services may also be arranged
for any sampling and testing
Testing of concrete and precast concrete products:
Contest have the facilities to offer a wide range of tests
on hardened concrete, which includes a number
of different compressive
test methods, flexural and tensile tests on concrete cores,
cubes, beams as well as on site testing.
In terms of fresh concrete, we can conduct mix
verifications, mix designs and casting of specimens for
tests such as shrinkage and AAR.
Site sampling of concrete for testing in our laboratory is
another service offered as well as coring for determining
concrete quality, strength and durability.
Tests on water,
hardened concrete, mortar and plaster as well as aggregates
can be performed by our competent staff when required.
With our in-depth knowledge of concrete construction and
many years of experience, we are able to assist in
investigating a wide range of concrete
defects. These include -
Dusting of surfaces
Wearing of concrete paving
also carry out surveys on older buildings to determine the
spacing, cover type and size of rebar.
Method statements / specifications for specialist work such
as grouting, high strength concrete, concrete toppings and
The following tests are regularly carried out by our staff
in our laboratory;
Aggregate crushing values (ACV) + 10% FACT
Bulk and Relative Densities
Making and curing concrete cubes
Compressive strength testing of cubes, cores, bricks,
blocks and pavers
Tensile splitting tests on pavers
Concrete Mix designs and mix verification checks
Durability Index testing
Flexural Strength testing
On site testing / surveys:
Sampling of test materials
Making cubes on site for clients
Coring of Concrete
BRE Screed testing
Schmidt Hammer Surveys
Cover Surveys and bar
Concrete Condition Surveys
Tensile Pull off Testing
All testing is carried out strictly in accordance with the
relevant specifications, be it British, American or South
African by well-trained staff.
The equipment is regularly calibrated and the laboratory
participates in correlation testing with other laboratories.
We have designed and carried out tests for specific