The water cement ratio (w/c) is an important parameter in mix design. This is be
ID: 1711229 • Letter: T
Question
The water cement ratio (w/c) is an important parameter in mix design. This is because:
It determines how much paste is available to coat the aggregate.
It determines the workability of the mix.
There is generally an inverse relationship between w/c and concrete quality: Generally, the lower the w/c, the higher the concrete quality resulting from decreased porosity, should proper handling, compaction and curing be provided.
All of the above.
None of the above.
A.It determines how much paste is available to coat the aggregate.
B.It determines the workability of the mix.
C.There is generally an inverse relationship between w/c and concrete quality: Generally, the lower the w/c, the higher the concrete quality resulting from decreased porosity, should proper handling, compaction and curing be provided.
D.All of the above.
E.None of the above.
Explanation / Answer
Answer (D) all the above
Water Cement ratio(w/c) is defined as the ratio of the quantity of water to the quantity of cement (both by weight) is taken in mix design.
Water cement ratio in a given volume of concrete will have significant influences on the workability.The higher the water content per cubic meter of concrete, the higher will be the fluidity of concrete,which is one of the important factors affecting workability.
Water cement ratio should be optimum in mix design to get desired workability for a particular construction.
if w/c is more than optimum seggregation will happend.
if w/c is less than optimum strength of concrete will falls rapidly due to introduction of air voids leads to decreased workability.
Quality: The higher the water/cement ratio, the greater the initial spacing between the cement grains and the greater the volume of residual voids not filled by hydration products leads to decreased quality of concrete.
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