Quality Control Tests For Cement Concrete Pavements

AMRUTHA
Institute of Engineering and management science

PAVEMENT MATERIALS AND CONSTRUCTION
QUALITY CONTROL TESTS FOR CEMENT

CONCRETE PAVEMENTS
Department of Civil Engineering
Submitted by.
Name: Vinod Kumar V
USN: (1AR21CV404)
Sem; 7th Sem
Year: 4th Year
Subcode; 18CV733
INTRODUCTION
 What is concrete?
Concrete is a most widely used construction material, Commonly
made by mixing of Cement with Fine Aggregate, Coarse Aggregate, Water
and Admixture.
 What is quality of concrete?

For the building structure to be durable, more strength and also
for aesthetic, accomplishing a quality concrete is of supreme importance.
This is because the vital factor which determine or makes a building look
elegant, gives a building more strength and durability the concrete’s
quality.
Quality control application in concrete construction
 Transport of the concrete to the construction site.
 Slump of the concrete.
 Pouring of the concrete.
 Control of water addition.
 Compaction of the concrete.
 Preparation of areas where different concrete pours are done.
 Control of compression test sample.
 Control of formwork removal.
 Mechanical properties of the reinforcement to be used.
 Dimension of the reinforcement.
 Mixing of the concrete.
 Properties of the cement used in the concrete.
Quality control tests
Quality tests on concrete are performed as a part of
quality control of concrete structures. Different quality
tests on concrete such as compressive strength tests,
slump tests, permeability tests etc. are used to assure
the quality of the concrete that is supplied for a given
specification. These quality tests on concrete give an
idea about the properties of concrete such as strength,
durability, air content, permeability etc.
Tests for Concrete Quality Check
Each quality test conducted on concrete determines
their respective quality result of concrete. Hence, it is
not possible to conduct all the test to determine the
quality of concrete. We have to choose the best tests
that can give good judgment of the concrete quality. The
primary quality test determines the variation of the
concrete specification from the required and standard
concrete specification. The quality tests ensure that the
best quality concrete is placed at the site so that
concrete structural members of desired strength are
obtained. Below mentioned are the quality tests
conducted on fresh and hardened concretes.
Workability test
Workability of concrete mixture is measured by, Vee-
bee consistometer test, Compaction factor Test, and
Slump test. Vee-bee consistometer test,
Compaction factor test, Slump test
Air content
Air content measures the total air content in a sample
of fresh concrete but does not indicate what the final
in-place air content is, because a certain amount of air
is lost in transportation Consolidating, placement, and
finishing.
Measurement of Air Content in Concrete by Press
ure Air Method
Setting Time
 The action of changing mixed cement from a fluid
state to a solid state is called “Setting of
Cement”. Initial Setting Time is defined as the period
elapsing between the time when water is added to the
cement and the time at which the needle of 1 mm
square section fails to pierce the test block to a depth
of about 5 mm from the bottom of the mold. Final
Setting Time is defined as the period elapsing
between the time when water is added to cement and
the time at which the needle of 1 mm square section
with 5 mm diameter attachment makes an impression
on the test block.
Compressive strength
The compressive strength of concrete cube test

provides an idea about all the characteristics of
concrete
Compressive Strength on Concrete Cores,
Compressive Strength of Concrete Cylinders,
Compressive strength of Concrete Cubes
Tensile strength
 The tensile strength of concrete is one of the basic and important
properties which greatly affect the extent and size of cracking in
structures. Moreover, the concrete is very weak in tension due to its
brittle nature. Hence. it is not expected to resist the direct tension. So,
concrete develops cracks when tensile forces exceed its tensile
strength. Therefore, it is necessary to determine the tensile strength of
concrete to determine the load at which the concrete members may
crack. Split Tensile Strength on Concrete
Modulus of elasticity
Modulus of elasticity of concrete is the ratio of stress
to the strain of the concrete under the application of
loads. Determination of Modulus of Elasticity
Permeability Tests on Concrete
When concrete is permeable it can cause corrosion in
reinforcement in presence of oxygen, moisture, CO 2,
SO3- and Cl- etc. This formation of rust due to
corrosion becomes nearly 6 times the volume of steel
oxide layer, due to which cracking develops in
reinforced concrete and spaling of concrete starts.
Permeability Tests on Concrete
In situ test on concrete
There are various in-situ test conducted on hardened
concrete, both destructive and non-destructive. Some
of them are concrete pull out tests, Break off tests,
Schmidt Hammer test. Schmidt Hammer,
Concrete pull-out, break-off, cones etc.
O U
G Y
K I N
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T H

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AMRUTHA

Institute of Engineering and management science

QUALITY CONTROL TESTS FOR CEMENT

 What is quality of concrete?

The compressive strength of concrete cube test

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