1.How much strength will be attained for M30 grade of
concrete after 28 days?
2.Is it attain 30 N/mm2 or target mean strength?
Answer Posted / ganaaji harsha
M30
Target strength for mix proportioning
f’ck = fck 1.65 s
Where
f’ck = Target average compressive strength at 28 days,
fck = Characteristic compressive strength at 28 days,
s= Standard deviation
From Table 1 standard deviation, s = 5 N/mm2
Therefore target strength = 30 1.65 x 5 = 38.25 N/mm2.
Target Mean Strength for M30 ( IS 456)
Fck 0.825*Standard Deviation
30 0.825*5
34.12
Is This Answer Correct ? | 15 Yes | 1 No |
Post New Answer View All Answers
What are the applications of modulus of elasticity?
What is the difference between yeild strength and compressive strength of steel???
How to calculate the crank rod in slab
Which architectural movement is also known as jazz moderna?
While doing civil foundation of machinery. How will you process for it? & We also fixing plates at top surface of foundation, then what is the procedure?
how to calibrate the RM 800
Describe the various methods of concrete curing?
what is the productivity in aluminium shuttering per day
What is the standard specification of MOR and Water Absorption of Homogenous Ceramic Floor Tiles?
Explain major differences between routing maintenance and major maintenance.
Can we apply curing compound on ceiling (slab Bottom)
Explain the difference between shear and tensile strength.
What ingredients with% found in ppc cement??
residential buildings,mixing of concrete,structural,construction material,site handling.
Mention different types of roof systems?