CEMENT
Cement is a binding material mixed with water and aggregate to form concrete or mortar.The mixture of cement and water is called Cement paste..The mixture of cement,water and fine aggregate is called mortar.The mixture of cement,water,fine and coarse aggregate is called Concrete or the mortar fill the voids in the presence of coarse aggregate is called Concrete.
Testing of Cement :- OPC & PPC
- Field test
- Laboratory test
1. Field test:-
- Take a look at cement paste, there should not be visible lump.
- Colour of cement should normally be greenish grey.
- It should give a cool feeling,when we put hand into the cement bag.
- Take a pinch of cement bag, it should give a smooth feeling.
- feel not oily when touched.
- Take a handful of cement and throw it on a bucket of full of water, the particle should float for some times before they sink.
2.Laboratory test:- Test of OPC: 33,43 and 53 grade
Ordinary Portland Cement- As per BIS
- Ordinary Portland Cement, 33 Grade- IS 269:2013
- Ordinary Portland Cement, 43 Grade IS 8112:2013
- Ordinary Portland Cement, 53 Grade- Specification, IS 12269:2013
- Ordinary Portland Cement, 43 Grade IS 8112:2013
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CHEMICAL / PHYSICAL
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SPECIFICATION
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REQUIREMENT
AS PER |
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REQUIREMENTS
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CLAUSE No.
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IS No. 8112 –
2013 |
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AMENDMENT
No. 6 |
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CHEMICAL REQUIREMENTS :
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5
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(Test Method IS : 4032 -1985)
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(i) Ratio
of Percentage of Lime to |
5.1
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Not Greater than 1.02
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percentage of silica, alumina and iron oxide
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And not less than 0.66
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CaO – 0.7SO3
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—————————————————
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2.8 SiO2 + 1.2 Al2O3 + 0.65 Fe2O3
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(ii) Ratio
of percentage of alumina to that |
5.1
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Not less
than 0.66 |
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of iron oxide
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(iii)
Insoluble residue, percent by mass |
5.1
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Not more
than 4.0 |
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(iv)
Magnesia, percent by mass |
5.1
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Not more
than 6.0 |
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v) Total
sulphur calculated as Sulphuric |
5.1
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Not more
than 3.5 |
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Anhydride (SO3), Percent by mass
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Total loss on ignition
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5.1
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Not more than 5%
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Chloride, percent by mass
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5.1
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Not more
than 0.1 |
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PHYSICAL
REQUIREMENTS : |
6
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( Test Method IS :4031-1988
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FINENESS :
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SP. SURFACE
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6.1
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Not less
than 225 m2/kg |
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SOUNDNESS :
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6.2
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a) Le-chatelier method
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Not more than 10 mm
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Expansion
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b) Auto clave test expansion
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Not more than 0.8%
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SETTING TIME
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6.3
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a) Initial Setting time in Minutes
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Not less than 30
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b) Final Setting time in Minutes
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Not more than 600
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COMPRESSIVE STRENGTH
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6.4
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72 ± 1
Hours |
(3 Days)
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Not less
than 23 MPa |
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168 ± 2 Hours
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(7 Days)
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Not less
than 33 MPa |
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672 ± 4 Hours (28 Days)
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Not less
than 43 MPa |
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* Not more
than 58 MPa |
- IS 1489(Part 1):1991 Specification for Portland pozzolana cement Part 1 Flyash based
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CHEMICAL/PHYSICAL
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SPECIFICA
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REQUIREMENT AS PER IS
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REQUIREMENTS
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TION
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No.1489(PART – I):1991
AMENDMENT |
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CLAUSE
No. |
No.3
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CHEMICAL REQUIREMENTS:
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6
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(Test Method
IS : 4032-1985) |
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(I). Loss of Ignition by mass, Max.
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6.1
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5.0
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(II).
Magnesia, Percent by mass Max. |
6.1
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6.0
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(III). Sulphuric Anhydride (SO3),
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6.1
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3.0
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percent by mass, Max.
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(IV). Insoluble residue, percent by
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6.1
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x +
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4(100-x)
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mass,Max.
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100
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(x=
where x is the |
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(V). Declare % of Fly Ash #
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5 & 9.1
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declare % age of fly ash )
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Not less than 15 % and Not more
than 35 % |
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(VI). Chloride, percent by mas #
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9.2
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Not more than 0.1 %
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PHYSICAL REQUIREMENTS:
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7
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( Test
Method IS : 4031 – 1988) |
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7.1
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Not less than 300 m2/ kg
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(I). Fineness: Specific surface
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(II). Soundness :
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7. 2
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(a).
Le-Chatelier Expansion Method |
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Not more than 10 mm
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(b). Auto
clave Expansion |
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Not more than 0.8 %
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(III).
Setting Time: |
7. 3
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30 minutes, Min.
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(a) Initial Setting Time
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(b) Final Setting Time
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600 minutes, Max.
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(IV). COMPRESSIVE STRENGTH
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7.4
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16 MPa, Min.
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72 +/- 1 Hours (3-Days)
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168 +/-2 Hours (7-Days)
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22 MPa, Min.
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672+/-4 Hours(28-Days)
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33 Mpa, Min.
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(V). Drying Shrinkage
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7.5
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Not more
than 0.15% |
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