Proportions for 1500 lb. per sq. in. Concrete Based on 28-day compressive strength of 6x12 in. cylinders. Proportions are expressed by volume as follows: Portland Cement Fine Aggregate : Coarse Aggregate. Thus 1:2.6:4.6 indicates 1 part by volume of portland cement, 2.6 parts by volume of fine aggregate and 4.6 parts by volume of coarse aggregate. Quantities of Materials for 1 cu. yd. of 1500 lb. per sq. in. Concrete The volume of cement is expressed in barrels and of aggregates in cubic yards. Quantities are net, no allowance being made for waste; for average conditions, the following additions are suggested: Cement, 2%; fine aggregate, 10%; coarse aggregate, 5%. Proportions for 2000 lb. per sq. in. Concrete Based on 28-day compressive strength of 6x12 in. cylinders. Proportions are expressed by volume as follows: Portland Cement Fine Aggregate : Coarse Aggregate. Thus 1:2.6:4.6 indicates 1 part by volume of portland cement, 2.6 parts by volume of fine aggregate and 4.6 parts by volume of coarse aggregate. Quantities of Materials for 1 cu. yd. of 2000 lb. per sq. in. Concrete The volume of cement is expressed in barrels and of aggregates in cubic yards. F = fine aggregate; C = coarse aggregate. Quantities are net, no allowance being made for waste; for average conditions, the following additions are suggested: Cement, 2%; fine aggregate, 10%; coarse aggregate, 5%. Proportions for 2500 lb. per sq. in. Concrete Based on 28-day compressive strength of 6x12 in. cylinders. Proportions are expressed by volume as follows: Portland Cement Fine Aggregate: Coarse Aggregate. Thus 1:2.6:4.6 indicates 1 part by volume of portland cement, 2.6 parts by volume of fine aggregate and 4.6 parts by volume of coarse aggregate. |