Highway Materials, Soils and Concretes

$2-$ Given: A highway department includes the following requirements in its specification for a $19mm-4\mathrm{.}75mm$

coarse aggregate to be used in asphalt pavement.

a$-$ Gradation: $\%$ passing

b$-$ Material finer than $75um(200$ sieve$)$ as measured in a washing test, $1\mathrm{.}5\%$ max.

c$-$ Amount of crushed particles, $60\%$min.

d$-$ Amount of flats and elongated particles, $20\%$ max.

Results of laboratory tests on an aggregate being considered for this use are:

$2-$ Washing test Total sample $-1981\mathrm{.}3g$

Mass after washing$-,1942\mathrm{.}6g$

$3-$ Crushed particle test Total sample$-1262g$

Amount crushed$-677g$

$4-$ Flats and elongated particles Total sample$-1719g$

Amount of flats and elongated particles$-,215g$

Find: Check this aggregate for acceptance according to the specifications given.

Solution: