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## Compressive Strength of Concrete -Cube Test [PDF], Procedure, Results

## Gopal Mishra

There can be many problems like thorough mixing of concrete, compaction, cement content, water content, size of aggregates etc. These are the main things to consider while mixing concrete. Also, transporting and placing can be a problem, as segregation can take place during transporting and placing.Read more

There can be many problems like thorough mixing of concrete, compaction, cement content, water content, size of aggregates etc. These are the main things to consider while mixing concrete. Also, transporting and placing can be a problem, as segregation can take place during transporting and placing. If you take care of your mixing, cement content, aggregate size proportion, water content, compaction etc, you will get good strength concrete.

See less## Compressive Strength of Concrete -Cube Test [PDF], Procedure, Results

## Gopal Mishra

you can use cylinder or cube for testing. We generally use cubes in India, may be at your place, you use cylinders for testing. But in India, we define strength as strength of cube after 28 days of casting. So we prefer cubes.

you can use cylinder or cube for testing. We generally use cubes in India, may be at your place, you use cylinders for testing. But in India, we define strength as strength of cube after 28 days of casting. So we prefer cubes.

See less## Core Sampling and Testing of Concrete and Factors Affecting Strength

## Gopal Mishra

BS 1881: Part 4: 1970 or ASTM C 42-77

BS 1881: Part 4: 1970 or ASTM C 42-77

See less## Compressive Strength of Concrete -Cube Test [PDF], Procedure, Results

## Gopal Mishra

cube size is 150x150x150, because it has been set as standard size, the value of compressive strength of which has been standardized at 28 days.We can also use 200mm cube, but you have to convert the compressive strength of 200mm cube to the equivalent of 150mm cube to know the actual strength of thRead more

cube size is 150x150x150, because it has been set as standard size, the value of compressive strength of which has been standardized at 28 days.We can also use 200mm cube, but you have to convert the compressive strength of 200mm cube to the equivalent of 150mm cube to know the actual strength of the concrete.

See less## Compressive Strength of Concrete -Cube Test [PDF], Procedure, Results

## Gopal Mishra

when you test a number of standard cube and a number of standard cylinderical specimen of concrete, and draw the normal distribution curve and then calculate the characteristic strength from cube and from cylinder, you will find the following Fck(cube) = 1.25 Fck (cylinder) => Fck of cylinder = 0Read more

See lesswhen you test a number of standard cube and a number of standard cylinderical specimen of concrete, and draw the normal distribution curve and then calculate the characteristic strength from cube and from cylinder, you will find the followingFck(cube) = 1.25 Fck (cylinder)=> Fck of cylinder = 0.8 Fck (cube)

Fck being characteristic strength.

This relation has been obtained from number of tests done on different samples.

## Quantities of Materials Per Cubic Meter of Concrete and Mortar Mix Proportions

## Gopal Mishra

I know the thumb rule to calculate the cement content of concrete mix per cubic meter. i.e. for ratio of mix 1:x:y, divide 44 by (1+x+y) i.e. cement content required in bags = 44/(1+x+y) for 1:2:4 (M15), cement content = 44/(1+2+4) = 6.2 bags = 310kg of cement for 1:1.5:3 (M20) cement content = 44/(Read more

I know the thumb rule to calculate the cement content of concrete mix per cubic meter. i.e. for ratio of mix 1:x:y, divide 44 by (1+x+y)

i.e. cement content required in bags = 44/(1+x+y)

for 1:2:4 (M15), cement content = 44/(1+2+4) = 6.2 bags = 310kg of cement

for 1:1.5:3 (M20) cement content = 44/(1+1.5+3) = 8 bags = 400 kg.

in your example, you are getting only 320 kg for M20, which i think is the old formula. After IS 456:2000, old M20 is now equivalent to current M15. i.e. ratio 1:2:4 is now M15.

See less## Combined Footing Design with Example and Types of Combined Footing

## Gopal Mishra

go to the link at the bottom of the page, and from there, slideshow will open. You can Actions option on the left bottom of the slideshow, from there you can download it as pdf or ppt.

go to the link at the bottom of the page, and from there, slideshow will open. You can Actions option on the left bottom of the slideshow, from there you can download it as pdf or ppt.

See less## Compressive Strength of Concrete -Cube Test [PDF], Procedure, Results

## Gopal Mishra

compressive strength is calculated by load divided by area perpendicular to that load.

compressive strength is calculated by load divided by area perpendicular to that load.

See less