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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


When the temperature rises what might happen to the sections of concrete if there are no gaps between them?

As the temperature rises, concrete expands due to thermal expansion. Without gaps between sections, the concrete may crack or buckle as it has no room to expand. This can lead to structural damage and compromise the integrity of the concrete structure.


How many concrete block can be laid in one hour?

five


Metal joints are placed between concrete sections of long?

beam


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"


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.