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The hardening property's of cement are measured on a parabola, in other words it will keep getting harder for ever , However that does not mean that it will necessarily be stronger for the job its required to do. e.g glass is very hard but its not strong enough to make a reasonable trampoline.
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Why fibers are used in concrete?
to increase the strength of the material and decrease the weight of the material
What is the difference between concrete grade and concrete strength?
concrete grade and strength are both revalent since if grade increase setting time will be less and curing to be done propely so that concrete strength will reach higher. If concrete grade is low curing to done longer days upto intial setting time to reach proper strength
How does nano concrete differ from ordinary concrete?
Micro structure of concrete with nano materials gets changed like anything and is resulting tremendous increase in compressive strength apart from increase in specific surface area.
What is ultimate 28 day concrete strength?
The strength of concrete on the 28th day is considered full strength with regard to the engineering calculations for its use. Concrete continues to get hard for 100 years or more, as long as it has water on it now and then. For a 6-sack concrete mix, its 28 day compressive strength should be at 4,000 psi or greater.
What is tensile strength of concrete?
The tensile strength of concrete is 10% of it's compressive strength.
Why fibers are used in concrete?
to increase the strength of the material and decrease the weight of the material
What is the difference between concrete grade and concrete strength?
concrete grade and strength are both revalent since if grade increase setting time will be less and curing to be done propely so that concrete strength will reach higher. If concrete grade is low curing to done longer days upto intial setting time to reach proper strength
How does nano concrete differ from ordinary concrete?
Micro structure of concrete with nano materials gets changed like anything and is resulting tremendous increase in compressive strength apart from increase in specific surface area.
Does sizes of aggregates affect the compressive strength of concrete?
Larger the size of aggregate will decrease strength of the concrete because surface area of this aggregate is low.Lesser the size of the aggregate will lead to increase the strength of the concrete.Well graded aggregate have all size of particles hence particle interferance is neglected,thus strength of concrete is more.
What is ultimate 28 day concrete strength?
The strength of concrete on the 28th day is considered full strength with regard to the engineering calculations for its use. Concrete continues to get hard for 100 years or more, as long as it has water on it now and then. For a 6-sack concrete mix, its 28 day compressive strength should be at 4,000 psi or greater.
What is tensile strength of concrete?
The tensile strength of concrete is 10% of it's compressive strength.
Is the characteristic strength of a concrete the same as the compressive strength?
Yes, the characterisrtic strength of a concrete is the same as the compressive strength
How does the moisture affect the strength values of concrete?
the moisture of concrete is main strength for reinforced concrete structure
Why the size of concrete cubes are 150mm?
Basically, the force supplied by a concrete compression machine is a definite value. For normal concrete strength application, say below 50MPa, the stress produced by a 150mmx150mmx150mm cube is sufficient for the machine to crush the concrete sample. However, if the designed concrete strength is 100MPa, under the same force (about 2,000kN) supplied by the machine, the stress under a 150mmx150mmx150mm cube is not sufficient to crush the concrete cube. Therefore, 100mmx100mmx100mm concrete cubes are used instead to increase the applied stress to crush the concrete cubes. For normal concrete strength, the cube size of 150mmx150mmx150mm is already sufficient for the crushing strength of the machine.
What is the relation between tensile strength and compression strength in concrete?
tensile strength is approximately between .08 to .15 of compression strength in concrete
Why permissible compressive strength decreases with increase in grade of concrete?
it Gives Better estimation and assumption on how much it could carry. By logic, higher strength concrete is used on larger loads therefore, it is still not sure if the loads will be larger than the specified concrete strength. Therefore, having lower permissible strenth helps designers to have allowances for loadings to ensure safety
What has the author Long T Phan written?
Long T. Phan has written: 'Experimental plan for testing the mechanical properties of high-strength concrete at elevated temperatures' -- subject(s): High strength concrete, Mechanical properties, Testing, Heating
