Answer Posted / wer
^The process of selecting suitable ingredients of concrete and determining their relative amounts with the objective of producing a concrete of the required, strength, durability, and workability as economically as possible, is termed the concrete mix design.
^Requirements of concrete mix design:
The requirements which form the basis of selection and proportioning of mix ingredients are :
a ) The minimum compressive strength required from structural consideration
b) The adequate workability necessary for full compaction with the compacting equipment available.
c) Maximum water-cement ratio and/or maximum cement content to give adequate durability for the particular site conditions
d) Maximum cement content to avoid shrinkage cracking due to temperature cycle in mass concrete.
^Standard mixes:
The nominal mixes of fixed cement-aggregate ratio (by volume) vary widely in strength and may result in under- or over-rich mixes. For this reason, the minimum compressive strength has been included in many specifications. These mixes are termed standard mixes.
IS 456-2000 has designated the concrete mixes into a number of grades as M10, M15, M20, M25, M30, M35 and M40. 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. The mixes of grades M10, M15, M20 and M25 correspond approximately to the mix proportions (1:3:6), (1:2:4), (1:1.5:3) and (1:1:2) respectively.
| Is This Answer Correct ? | 9 Yes | 0 No |
Post New Answer View All Answers
natucher of concrete &type of concrete?
how to calculate cut length of re-bar in a circle . because we not place same length of re-bar in whole circle maximum in center and minimum at corner so how to calculate middle bars???
Write short note on construction programme for pile foundation.
Method of findingthe dry ingredient quantity of 1 m3 concrete. what is the difference between static and dynamic induced emf? Testing charges bill given for Rs. 32,000/- but not added service tax in this bill. So, How much TDS will be deduct
hi, i am doing my B.tech third year and i want to have a job in Genpact...So can you help me which kind of job would be more appropriate for me in such a company and How should i prepare for an interview?
2. What are the advantages of your present job, things you like about it?
How to calculate canal slope curvature qty!
Please send me the qunty. of mason/labour required in each day for different type of civil construction work?please send me ans. in my mail.my mail id is (parthamitra086@gmail.com) or here.
if we know load bearing capacity of the soil and building load falling in each footing, then how to choose the type of foundation??? and if it is shallow foundation then which type of shallow foundation should be choosen i.e either strip or isolated or raft or combined or cantilever footing???????
how to calculate the crushing strength of cement concrete paver blocks 100x100x60 mm thich.
How to come 1.54 from dry to wet concrete?
Q 1) 1 Mason and 2 LABOUR / _________CUM brick work Q 2) 1 Mason and 1 LABOUR / _________SQ FT Plaster work Q 3) 1 Carpenter & 2 Labour/_________SQ FT shuttering work Q 4) 100 SQ FT roof slab concreting ____________mason and labour required
What is the difference between tor steel and tmt steel?
What is the absolute pressure scale?
Explain what are the skills required to become an architect?
