Given the particle size distributions of two aggregates and the required limits of particle size distribution for the mix, determine a suitable ratio for blending the two aggregates to obtain an acceptable combined aggregate.
What will be an ideal response?
Observation of the results of the sieve analysis indicate that aggregate B
appears to more closely conform to the required mix for most sizes; therefore, the
initial mix design should contain more than 50% aggregate B. The initial trial will
be 40% aggregate A and 60% aggregate B. The following table shows the sieve
analysis data and the computations required to obtain the required gradation.
The proposed design (40% aggregate A and 60% aggregate B) is acceptable.
Note that other combinations are also possible.
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