Question

Describe five tests of hardened concrete?

please answer with typing not by handwaiting just to be more clear.

Thanks

Answer 1

1) Compression strength test

It is a destrctive test and it is concrete cube testing is a primary quality compliacnce check on the specified design characteristics compressive strength of concrete

▪︎by using the utm machine or compressive strength machine

▪︎mould size 150mm×150mm×150mm

2)split -cylinder test

▪︎it is subject to a uniform load along the length of the specimen

▪︎split cylinder test to dertermine the tensile strength of concrete by splitting cylinder of concrete in a compression testing machine

▪︎Tensile strength can be calculated as Ft=2p/piLd

3)fextural test

▪︎it is Common method for measuring tensile strength of

Concrete

▪︎this produces tensile stress at bottom of the beam and compressive stress at top

Vertical crack called flextural crack near the section of maximum moment

4)rebound hammer test

▪︎it is used to establish weather the rebound hammer number has reached a value know to correspond to the desired strength

▪︎it is non destructive test

▪︎it is also know as schmidt hammer test

5)ultrasonic pulse velocity

▪︎it is used to measurement the speed of ultrasonic pulses through the concrete through the concrete to correlate concrete strength to standard strength

▪︎it is used to dertermine compressive strength of concrete and location of cracks

▪︎it is non destructive test