Answer / akrmsb

It is done by the rebound hammer test.

A cube of size 150mmX150mmX150mm is kept in the machine and a gradual load of 140kn/cm2/minute is applied on it till it fails.

Then the reading on the machine is divided by the area of cube to get the actual compressive strength.

For example area of the cube is 150mm X 150mm = 22500mm2
and the reading from the machine is 751000 n/mm.

Then the compressive strength of the cube will be 751000/22500 = 33.37 N/mm.

Answer / skj

we put the cube in compressive testing machine then apply
load in kn unit then we note downthe reading just srating cracks

Answer / ronak shah

putcube in compressive testing machine, give pressure 140
kg/sqcm/minute.

strength= load/area

if you want to know the solid cube density. take weight of
cube.
forumala;
density=mass/volume=weight of cube/volume of cube
(0.15*0.15*0.15)

ans gives you density of solid concrete.

if you want wet concrete density then take cylinder 10
liter weight of empty cylinder then fill with concrete

weight of concret/volume of cylinder its gives density of
wet concrete.

Answer / md sajid

Qube strength

Answer / gourab

By Rebound hammer test

what is the development length?

2 Answers  

how much cubic feet cement contain in one bag

12 Answers  

what is the minimum and maximum thickness of plaster.?

11 Answers   Arabtec,

How could I calculate quantities of fine aggrigates(sand) & coarse aggregates in pcc M15

1 Answers   Coromandel, RECPDCL,

Why are steel plates inserted inside bearings in elastomeric bearings?

0 Answers  

material calculations for I st coatplastering 16mm CM (1:5),second coat CM(1;3)4mm thick,pcc(1:4:8),RCC M20,lime stone masonry CM(1:6)

1 Answers  

What is the best concrete grade for raft foundation up to 1.5 meters depth?

3 Answers  

How to calculate thickness of MAT slab & Reinforcement? The dimention of under ground water reservoir is 80'X14'X 12 ft

0 Answers  

I dont know english very well to speak,in interview if they ask to introduce yourself means how to answer in english?

2 Answers   GMR,

What is a BBS?Find out the cutting length for a 600*600 foundation with 50 mm cover

1 Answers   CSL Group,

what opc & ppc cement $ composition?

1 Answers  

what is mean civil

5 Answers