0.3 mm) without any treatment or contaminants, sourced from a
local recycling plant, were used to replace part of the fine aggregate.
CSR with continuous grading was achieved by blending RA, RB and
RC manually. Sieve analysis tests were carried out and the grading
curve of each sample is shown in Fig. 1. RA, RB and RC were of
relatively singly-sized, while the PSD of CSR was similar to sand
with varying sizes.
SSD water absorption and SSD density of rubber particles were
also measured. However, rubber particles were found to float in
water. To overcome this problem, a tightly woven fabricwas used to
wrap rubber particles. The wrapped rubber particles were submerged
in a water filled bucket, followed by gentle shaking within
the water to release as much trapped air as possible until it easily
sank to the bottom of the bucket. Other procedures for measurements
were the same as those for measuring coarse and fine aggregates.
The results of SSD water absorption and SSD density of
rubber particles are shown in Table 1.