Decrease in water/cement ratio will??1)increase in strength 2)Difficult to obtain a smooth finished surface3)Decrease in strength4)Reduction in long term durability Increase in water/cement ratio will??1)Increase in strength 2)Difficult to obtain a smooth finished surface3)Decrease in strength4)Reduction in long term durability
Decrease in water/cement ratio will result in difficulty in obtaining smooth finished surface. Increase in water/cement ratio will result in(3) Decrease in strength.
A decrease in water/cement ratio will increase strength and durability due to the fact that there will be less capillary voids (due to bleed water rising to the surface), hence making the concrete stronger and less susceptible to water, air and contamination's entering through the capillary voids and deteriorating the concrete internally. However, if it is to dry it will make it difficult to finish. Have a look at the web site below under Mix Water Enhancer for more detailed info on the above.
It is sure that the strength of concrete is directly proportionate to the water cement ratio. Decrease in water cement ratio increase the strength of concrete to some extent, but an optimum ratio is to be maintened so that entire cement part of the concrete can take part in reaction, failing which the concrete will decrease its strength. More over for lesser W/C ratio the workability of the concrete will be affected. So that it is difficult to obtain finishing of your shape. on the contrary, if you increase the W/C ratio it will reduce the strength of concrete. As to react the chemical reaction of cement it required a optimum amount of water. More than that, residual quantity of water will be in the concrete structure. In due course that water will evaporate from the concrete leaving pores in the concrete surface. Which makes the concrete of lesser strength.
Decrease in water/cement ratio will? Increase in strength Increase in water/cement ratio will? Decrease in strength Cheers and good luck!
