Answer / bidyut dey

1.after 28 days it will be attained 30 N/MM2
2.Terget mean strength

Answer / 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

Answer / swapnil

After 28 days Strength FOr M30 IS 34 N/mm2

Answer / chandrasekhar j

1.30 n/mm2
2.it is target mean strength

Answer / wasim

30N/mm2

Answer / shubham singh

1: 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 = 5 (IS 10262:2009, table 1)
From Table 1 ( IS 10262:2009, Clause 3.2)
f’ck = 30 + 1.65 * 5
= 38.25 N/mm2
2: It should attain target mean strength

Answer / aditya mayekar

1.after 28 days it will be attained 30 N/MM2
2.Terget mean strength

what will be the quantity of following materials in P.C.C for the total area of (100'x70'x 0'4") 1)NO. OF CEMENT BAGS 2)SAND IN CU.FT 3)METTLE IN CU.FT

0 Answers   Pratibha Industries,

suppose that  156000 sq.ft rcc work builtup are.how many % of brick work to rcc work.

0 Answers   Progressive,

how to calculate weight of round steel bar and square steel bar, i section bar and c channel bar, angle bar

2 Answers  

WHAT TYPE OF BINDING WIRE IS USED IN OFF SHORE STRUCTURES. WHEATHER COROSIVE OR NON COROSIVE LIKE EPOXY COATED,PLASTIC COATED ETC.

1 Answers  

Why the name is "partial safety factor" why not "safety factor"?

0 Answers   Engineers India Limited,

Typical floor design load in Residential Building----------- -----

2 Answers  

time and work questions

0 Answers  

what post do you prefer to work in this company and why do you think you can serve better in such position?

0 Answers  

sir when can we expect the AEE results and when will be the interviews sheduled please guide us in this regard thanking you

0 Answers   TCS,

what is the meaning of laitance

4 Answers   Maytas,

The place Chakri Dadri which was recently in news in located in______ place? A) Uttar Pradesh B) Uttarakhand C) Rajasthan D) Haryana

1 Answers   HPSSSB,

what is meant by velocity & gravity ?what is the difference between normal liquid flow & gravity liquid flow ?

6 Answers