question on concrete

Aolaniyi

Newbie
Oct 15, 2019
6
0
Nigeria
please what is the current characteristics strength of concrete with mix ratio 1:2:4 using cement grade of 42.5N and 20mm aggregate? thanks
 

Ko Ko Lwin

Newbie
Oct 15, 2019
2
0
Myanmar
Mix ratio 1:2:4 = Cement:Sand:Gravel, not include water. Concrete strength is depend on W/C, A/C. Water Cement Ratio is Chief factor on Concrete strength.
 

amd007

Premium Member
Apr 17, 2018
232
323
mumbai
IS 456-2000 has designated the concrete mixes into a number of grades as M10, M15, M20, M25, M30, M35, M40 and so on....

In this designation, the letter M refers to the mix and the number to the specified 28-day cube strength of mix in N/mm2.

Attaching below a table containing the various compressive strength at 28 days.

Different concrete grades and strength.png
 
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Aolaniyi

Newbie
Oct 15, 2019
6
0
Nigeria
IS 456-2000 has designated the concrete mixes into a number of grades as M10, M15, M20, M25, M30, M35, M40 and so on....

In this designation, the letter M refers to the mix and the number to the specified 28-day cube strength of mix in N/mm2.

Attaching below a table containing the various compressive strength at 28 days.

Different concrete grades and strength.png
thanks
 

Waqa

Newbie
Oct 18, 2019
2
0
Thoothukudi
What's fineness modulus?
It tells whether your aggregate are fine or coasre
For fine aggregate
FM 2.2 to 3.2
And for coarse aggregate
FM 6 to 7
 

sachin0102

Apprentice
Oct 10, 2019
11
1
Raxaul
please what is the current characteristics strength of concrete with mix ratio 1:2:4 using cement grade of 42.5N and 20mm aggregate? thanks
Actually, characteristics strength will depend on various factors like quality of material, different properties of material and other condition.
But as per nomimal mix, characteristic strength will be 15 N/mm2 for 1:2:4.