Answer / anupam nath

Chemical reaction of cement and water will gives strength
to concrete. As soon as concrete placed in its place and
normal weather condition, during day time water percentage
in concrete evaporate and to retain the water in concrete
for at least seven days, we used to cure the structure by
sprinkling water on it.Curing starts after 24 hrs of
pouring.

Answer / manoj p. v

when Portland cement is mixed with water a chemical reaction called hydration takes place. The extent to which this reaction is completed influences the strength and durability of the concrete. Freshly mixed concrete normally contains more water than is required for hydration of the cement; however, excessive loss of water by evaporation can delay or prevent adequate hydration. The surface is particularly susceptible to insufficient hydration because it dries first. If temperatures are favourable, hydration is relatively rapid the first few days after concrete is placed; however, it is important for water to be retained in the concrete during this period, that is, for evaporation to be prevented or substantially reduced.

Answer / padmanabhan

to prevent the reduction of volume/shrinkage of concrete..

Answer / vijay kumar

The curing period depends upon the type of cement used, mixture proportions, required strength, size and shape of member, ambient weather, future exposure conditions, and method of curing. Since all desirable properties are improved with curing, the period should be as long as practical. For most concrete structures, the curing period at temperatures above 5º C (40º F) should be a minimum of 7 days or until 70% of the specified compressive or flexural strength is attained. The period can be reduced to 3 days if high early strength concrete is used and the temperature is above 10º C (50º F)

Answer / adeel

to avoid cracks that are generated by heat of cement.

Answer / bethina sudheer

cement in the concrete attains strength with water

In BBS,Find out the cutting length for a 2000*2200 column with 50 mm cover?

1 Answers   NKG Infrastructure,

What is meant by End contractions

1 Answers  

HOW TO PARKING SPACE HS CALCULATED IN MULTISTORY BUILDING?

1 Answers  

Why is concrete cube test carried out?

0 Answers  

M30,M35,M40,M45 how much ratio

3 Answers   JMC, JMC Projects,

what is the density of the polythene sheet

2 Answers   NCC,

how to calclate the cemment for 1 cubic metre of 1:2:4 concrete

2 Answers  

What is the Compressive strength of concrete C40/20 at 7days

1 Answers  

how to calculate the loads on slab? what are the steps?

1 Answers   NHAI,

hi, i am appearing in HPCL(CIVIL ENGG.)exam. plz send me placement paper of this exam if u are having

0 Answers   HPCL, IL,

Which code specifies the specification ofthe construction joints to be provided in the raft slab of a basement which is 6 m deep.what should bethe detail of such a joint?

0 Answers   L&T,

What is meant by solid geometry?

0 Answers