(Solved): A concrete mix is made with a weight proportion of 1 : 0.4 : 1.8 : 2.5 (cementitious: water: sand : ...

A concrete mix is made with a weight proportion of 1 : 0.4 : 1.8 : 2.5 (cementitious: water: sand : coarse). You decide to adjust the mixture so that the cementitious is a blend of 90% Portland cement and 10% silica fume. You assume the mix will produce about 5% air content. The BSG is 3.15 for cement, 2.2 for silica fume, 2.5 for sand and 2.7 for coarse aggregate. If you want to make 8 cubic yards of concrete, what are the SSD weights for each material?