Cement Tests are performed to know the strength and characteristic properties of cement. Various Test on cement is known nowadays to check the quality of cement. To know the properties of cement such as specific gravity, strength, fineness, consistency, etc. various Cement Testing Methods are used. Testing of materials is essential before use in construction work.
Overall, the tests on cement play a vital role in ensuring the quality, strength, and performance of cement in construction projects. They contribute to the safety, durability, and long-term integrity of structures.
Cement Test
The following cement test conducted in the laboratory
- Fineness Test of Cement
- Consistency Test of Cement
- Setting Time Test of Cement
- Soundness Test of Cement
- Heat of Hydration Test
- Specific Gravity Test of Cement
- Tensile Strength Test
- Chemical Composition Test
1. Fineness on Cement
The fineness of cement is a measure of cement particle size and is denoted as terms of the specific surface area of cement. The Test is done by sieving cement samples through a standard IS sieve.
The weight cement particle whose size is greater than 90 microns is determined and the percentage of the retained particle are calculated. This is known as the Fineness of cement.
Apparatus
- 90µm IS Sieve
- Weight Balance having a capacity of 10 mg to 100 g
- Nylon or pure bristle brush
IS Code
Determining the fineness of cement by using a 90 µm IS sieve is done as per IS 4031 (Part 1) – 1996.
Result
The standard value of fineness of cement should have a fineness of less than 10 % or fineness should not be more than 10% as per IS Recommendations.
Read More: What Is Fineness of Cement | Fineness Test of Cement
2. Standard Consistency Test
The standard consistency of cement paste is defined as the percentage of water added In 300gm weights of cement which will permit a Vicat plunger having 50 mm length and 10 mm diameter to penetrate in cement paste to a depth of 33-35 mm from the top of the mold.
Apparatus
- Vicat apparatus
- Balance
- Gauging Trowel
- Stop Watch, etc.
IS Code
Consistency Test of Cement IS Codes – IS: 5513-1976, IS: 4031 ( Part 4 ) – 1988
Result
The standard consistency of cement paste generally varies between 25-35%.
3. Initial and Final Setting Time Of Cement Test
The Initial Setting Time gives an idea about how fast cement can start losing its plasticity and the final setting time of cement gives an idea about how much Time cement takes to lose its full plasticity and gain some strength to resist pressure.
Initial Setting Time of Cement: It is the time elapsed between the moments that the water is added to the cement, to the time that the paste starts losing its plasticity.
Final Setting Time of Cement: It is the time elapsed between the moment the water is added to the cement and the time when the cement paste loses its plasticity completely and has attained sufficient firmness to resist certain definite pressure.
IS Code
As Per IS: 4031 (Part 5) – 1988. The initial and final setting time of cement is calculated using the VICAT apparatus conforming to IS: 5513 – 1976.
Apparatus
- Balance
- Vicat Apparatus
- Stop Watch
- Gauging or Mixing Trowel
- Glass Plate
- Enamel Tray
Result
As per standards, the initial setting time of cement should be less than 30 min for OPC cement. Whereas, it should not be more than 600 min for OPC cement.
4. Soundness Test of Cement
The soundness of cement indicates the stability of any cement during the volume change in the process of setting and hardening.
In case the volume change in cement is unstable after setting and hardening, the concrete element will crack, which can affect the quality of the structure or even cause serious accidents, known as poor dimensional stability.
Apparatus
- Le-Chatelier mold
- Cement
- Glass sheets
- Mixing pan
- Trowel
- Wight
IS Code
IS Code for the soundness test of cement is IS: 4031-Part 3-1988
Result
The soundness calculated L1 – L2 for the types of cement Ordinary or OPC, Rapid, Low Heat, PPC, and High alumina cement should not Exceeds 10mm.
5. Heat Of Hydration Test
During the Curing of Concrete, Hydro-thermal Reaction takes place, resulting in the production of heat because of chemical reactions. The rise of heat in concrete could be as high as 50oC.
Hence in order to reduce such heat, low-heat cement is used. The test is carried out using a calorimeter using the principle of heat gain.
Apparatus
Calorimeter, insulated wood case, thermometer plus holder, vacuum jar with stopper, glass funnel, stirring paddle, and chuck are the apparatus required for the test.
IS Code
IS 4031-1968 is recommended for testing the heat of hydration of Cement.
Result
It has been Standardised that the low heat cement should not generate heat of 65 Calories per gram of cement in 7 days and 75 Calories per gram for the duration of 28 days.
6. Specific Gravity Test On Cement
The specific gravity of cement is defined as the mass of cement of a specified volume to the mass of water of the same volume of cement. It can also be defined as the density of cement to the density of water for the same volume.
Apparatus
- Le Chaterlier flask
- Weighing balance
- Kerosene (free from water).
IS Code
IS code for Specific Gravity Test is IS 2720- Part 3
Results
The Specific Gravity of Cement is 1440 kg/m3. Around this value, the Specific Gravity of Cement is Considered to be standard and suitable for construction.
Read More: Specific Gravity of Cement | Specific Gravity Test on Cement
7. Tensile Strength Test
The Tensile Strength of Cement is the maximum load that cement in its hardened state can withstand without fracture when tension is applied.
It is necessary to test the tensile strength of cement because concrete structures are highly prone to tensile cracking due to various kinds of load applied. As compared to Compressive Strength Tensile strength is very low.
Apparatus
- Testing Machine
- Tamping Rod
- Concrete Mould
- Trowel
IS Code
IS:456 2000 gives the formula for calculating the tensile strength of concrete.
Result
The Tensile Strength of Cement is between 3-5 MPa i.e 300 – 700 psi.
8. Chemical Composition Test
The components present in cement for forming cement as the complete products are lime or limestone, silica (SiO2), alumina (Al2O2), magnesia (MgO), etc. Among which most important raw materials required for making cement are limestone, clay, and marl.
Apparatus
Flame Photometer and ELE Flame Photometer are the instruments used to know the constitutes of Cement.
IS Code
IS 269-1998 is recommended for keeping a check on the chemical composition of cement.
Result
A good cement should have the constitution of components as listed,
- Lime or Limestone – 62% (Highest)
- Silica (SiO2) – 22%
- Alumina (Al2O2) – 7.5%
- Magnesia (MgO) – 2.5 %
- Other Components – remaining 6%
You might Also Like :
- Specific Gravity of Cement | Specific Gravity Test on Cement
- Standard Consistency Test of Cement | Vicat Apparatus
- The Soundness of Cement | Soundness Test of Cement | Le Chatelier Apparatus
- What Is Fineness of Cement | Fineness Test of Cement
- Can You Pour Concrete Over Concrete | How to Pour Concrete Over Existing Concrete
- What Is Concrete Grinder | Types of Concrete Grinders | Walk Behind Concrete Grinder
- High Strength Concrete | High Strength Concrete Mix | High psi Concrete
Pingback: Cement Test | 8 Test On Cement | Cement Testing Methods | Contractors News Daily
Pingback: Compressive Strength Of Concrete | Concrete Cube Strength At 3 Days, 7 Days, 14 Days & 28 Days - BDNEWSUP
Pingback: Cement Test | 8 Test On Cement | Cement Testing Methods - BDNEWSUP