Effects of Aggregate Absorption and Crush Percentage on
Bituminous Concrete      Published: Jan 1992        Format Pages
Price       PDF (124K) 10 $25   ADD TO CART     Complete Source
PDF (5.6M) 10 $64   ADD TO CART       Recently, the push to
improve bituminous concrete mixtures has resulted in higher
fractions of crushed aggregate. Since coarse aggregate is
becoming more difficult to extract as gravel sources are
depleted, the cost of supplying crushed aggregate is increasing.
Adding too much crushed aggregate can produce two mechanisms for
problem mixes. The first arises from the crushing and washing of
the manufactured fines portion of the aggregate. Hammermill,
impact or cone crushers have a tendency to produce gradations
for fine aggregates below the maximum density line when washed.
This can lower the voids in mineral aggregate which is important
to resist rutting.      A theory is advanced that aggregate
water absorption can be used to predict the bonding surface
volume available to improve results o