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Why is concrete better than bricks?
Big sections can be made in one fill. Bricks need to be laid one at a time in rows by hand. You have to wait for the mortar to firm up before adding too much weight above. Concrete also can be made in sections off site & assembled on site
How many concrete block can be laid in one hour?
five
Where would you use precast concrete?
Bridge sections, tunnel sections and other places where setup of a normal pour is cost prohibitive.
Why should large concrete slabs be laid with expansion so that they are not touching?
because large slabs of concrete have expansion joints between them.
Why concrete roads are laid in section with pitch between them?
Concrete, whether in a road or a building expands (gets longer) in hot weather and contracts (gets shorter) in cold weather. So the builders install an expansion strip every so many feet to allow the concrete to make these small but significant changes in length. If this were not done, the concrete, when warm, would expand, and having nowhere to go, would go up (roads) or out (buildings), thus ruining the road or building. These expansion joints are filled with pitch, tar, or mastic - they call it different things in different parts of the country - to keep out water. Water would freeze, and cause the same problems.
What grade of concrete is laid for bed of foundation?
Full basement is the grade of concrete that is laid for foundation.
Why is concrete better than bricks?
Big sections can be made in one fill. Bricks need to be laid one at a time in rows by hand. You have to wait for the mortar to firm up before adding too much weight above. Concrete also can be made in sections off site & assembled on site
Why are concrete roads laid in sections with a pitch between them?
Because then it has room for moving and shrinking, growing etc Concrete roads and pavements are laid in sections and a all gap is left between each sections. This is filled either tarmac or rubber compound
What material allows concrete sections to expand on bridges?
Material such as wood allow the concrete to expand
What are concrete groynes?
a concrete groyne is a huge slab of concrete laid down in the sea joined from the shore oh and i nearly forgot its made out of concrete
What are Metal joints are placed between concrete sections?
Roadways?
How many concrete block can be laid in one hour?
five
Is it Their towels laid on the concrete all day or Their towels lain on the concrete all day?
Well, does it have what put it there? No. Therefore, it is laid. If it were lain, it would have what put it there. for example: "the chicken had lain 6 eggs"
Metal joints are placed between concrete sections of long?
beam
Why is polythene laid in a cement concrete pavement?
To form a waterproof barrier.
Where would you use precast concrete?
Bridge sections, tunnel sections and other places where setup of a normal pour is cost prohibitive.
Why should large concrete slabs be laid with expansion so that they are not touching?
because large slabs of concrete have expansion joints between them.
