8Mohamed N A, Maged M F. Short - term impact of high - aggregate fines content on concrete incorporating water - reducing admixtures [ J ]. ACI Materials Journal,2003,100 (4) : 280 - 285.
9Goncalves J P, Tavares L M, Toledo Filho R D,et al. Comparison of natural and manufactured fine aggregates in cement mortars[ J]. Ce- ment and Concrete Research,2007,37 (6) :924 - 932.