New Technology for Concrete Testing
First
let’s understand what is compressive strength and why testing is important?
Compressive
strength is the ability of material or structure to carry the loads on its
surface without any crack or deflection. A material under compression tends to
reduce the size, while in tension, size elongates. Compressive strength depends
on many factors such as water-cement ratio, cement strength, quality of
concrete material and quality control during the production of concrete, etc.
The
compressive strength of the concrete cube test provides an idea about all
the characteristics of concrete. So it is important to carry out the test
on the field. Many cement companies have started their mobile concrete van for
site testing to serve better and its boon for Construction industry because
cement and concrete are the key materials for construction. This mobile lab
provides technology straight to you. Now we understand how tests to be done.
Firstly,
this mobile concrete lab goes to the respective site. Then concrete samples
have been taken and poured in the mould. Generally cubical mould of size 15cm x
15cm x 15cm are commonly used. 10cm X 10cm x 10cm can also be used that
depends on the size of aggregate. Then poured concrete in the moulds are
tempered so as not to have any voids. After 24 hours, moulds are removed and
specimen are put in water for curing. By applying cement paste to the whole
area of specimen we can get smooth and even surface and it is necessary to have
it.
These
specimens are tested by compression testing machine after seven days curing or
28 days curing. In this testing procedure load should be applied gradually at
the rate of 140 kg/cm2 per minute till the specimens fails and value of load
during the time of failure is noted. This load divided by the area of specimen
gives the compressive strength of concrete.
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Blog
written by
Shruti Doshi
Technical
Officer – Sanghi Cement & Blogger
Blog
Managed by
Digital
Marketing Officer – Sanghi Cement
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