size with fineness modulus of 6.0 similar to those of LS. The XRD
pattern of aggregates (as shown Fig. 1) showed that LS consisted
mainly of calcium carbonate (C) with some quartz (Q) and dolomite
(D). RCA consisted of calcium carbonate (C), quartz (Q), and calcium
hydroxide (CH, from attached mortar). The properties of aggregates
are shown in Table 1.