Environment Temperature
Due to the provision of concreting in more hot weather, the plastic shrinkage in the slab is developed, due to which the cracks are there, which we have to avoid. Environment Temperature
Concrete Temperature
If the temperature of concrete is more than 35 ° C, then we should use ice in concrete.
Water Cement Ratio
Due to the high water-cement ratio, the concrete gets bleed, in which all the water of the concrete comes on the filter, which is a very vital reason for the cracks.
Compaction Frequency
excessive use of a vibrator is also not good for concrete.
Presence of silt
The presence of silt in fine aggregate also results in hair cracks in concrete.
Reinforcement Temperature
Crack has also been seen occasionally due to the overheating of the steel bar used in construction works.
Presence of Lubricant on the rebar
The application of grease or shuttering oil or any kind of Lubricant on the rebar can prove fatal for concrete.
The difference in Slump Test Value
different lot's slump tests should not have much difference in the character, because of this also the cracks have been seen in the slab.
Types of Cement
if you use cement whose heat of hydration is very high, then the chances of cracks in the slab will become higher.
Overheating of shuttering material
Cracks can also be seen occasionally due to the heating of the shuttering material