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The first thing that happens is the Hydration process is interrupted by the water in the mix no longer being able to properly mix with and have time to react [Hydrate] the Portland Cement. Since the cement is the ingredient that "glues" the fines and aggregate together to form this artificial rock, there is a loss of the compressive strentgh intended for that particular mix.
A concrete floor meant to develop 3500 psi may only test out at 2500. With a bad cure you will see dusting, scaling and flaking of a finished surface almost immediately. Very Important to observe ambient temperatures hot and cold when placing concrete. If you live in a cold area, Freeze Thaw Damage is a condition where excess moisture that is allowed to accumulate IN a Cured concrete will expand on freezing [10-15%] and cause surface delaminations, pop outs and scaling of a surface long after it has set or cured. That's why it is so important to waterproof even an aged concrete with a penetrating sealer to decrease the moisture content and avoid this also.
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What is green brick?
Freshly laid brick. Not yet cured.
How long does a freshly laid egg last?
2 weeks
What grade of concrete is laid for bed of foundation?
Full basement is the grade of concrete that is laid for foundation.
How do you stop frost attack on freshly laid brickwork?
by removing the incorrect frost
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
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"
Why is polythene laid in a cement concrete pavement?
To form a waterproof barrier.
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.
When you jack your penis what happens?
You get laid!!!
How does hot weather make concrete crack?
If the correct concrete mix is used and laid properly, hot weather should not make concrete crack. Instead, it is the freeze-thaw cycle that makes concrete crack.
What is Damp proof membrane under concrete slab?
This is a heavy gauge polythene laid under the concrete to stop dampness rising upwards
