Sage-Tips

How can you tell the quality of concrete?

Methods for Testing Compressive Strength of Concrete

1. Rebound Hammer or Schmidt Hammer (ASTM C805)
2. Penetration Resistance Test (ASTM C803)
3. Ultrasonic Pulse Velocity (ASTM C597)
4. Pullout Test (ASTM C900)
5. Drilled Core (ASTM C42)
6. Cast-in-place Cylinders (ASTM C873)
7. Wireless Maturity Sensors (ASTM C1074)

What are the different tests on concrete?

The following tests are conducted on cement in the laboratory are as follows:

• Fineness Test.
• Consistency Test.
• Setting Time Test.
• Strength Test.
• Soundness Test.
• Heat of Hydration Test.
• Tensile Strength Test.
• Chemical Composition Test.

How can we identify 53 grade cement?

Reference IS code number should be printed on the cement bag. For example, if you have ordered OPC 53 grade cement, then “IS-12269-1987” should be printed on the cement bag, and if you have ordered Portland Pozzolana Cement (PPC), “IS 1489-1991” should be printed on the cement bags.

Which grade is best in cement?

Best Cement for Concrete Grade 33 and Grade 43 OPC cement are the old grade of cement used for residential construction and nowadays it is replaced by OPC 53 grade of cement. OPC 53 grade cement is the best cement for concrete.

How can we check the engineering quality of cement on site?

It is not possible to check all the engineering qualities of cement on site but there exist some field test which gives us a rough idea of quality of cement. While on site we can perform these field tests to judge the quality of cement. These field tests are as follows:

What are the field tests on cement?

Field Tests on Cement. 1 1. Date of Packing. Date of manufacture should be seen on the bag. It is important because the strength of cement reduces with age. 2 2. Colour. 3 3. Rubbing. 4 4. Hand Insertion. 5 5. Float test.

How do you test strength of a cement block?

Strength Test A block of cement 25 mm*25 mm and 200 mm long is prepared and it is immersed for 7 days in water. It is then placed on supports 15000 mm apart and it is loaded with a weight of 340 N. the block should not show any sign of failure.

How to test for cement hydration?

Cement Temperature Test Immerse your hand into a bag of cement; you should get a cool feeling, not a warm one. The cool feeling shows that cement hydration has not taken place in that bag of cement. 7. Cement Float Test When you through a small amount of cement on water, the cement particle should remain on the water surface for a while. 8.