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Concrete Dry Quantities examples in class. Week 3. Dry Mix Quantities – Review. Above for 1.0m³ of concrete. Therefore for 3.0m ³ of concrete 0.8 x 3 = 2.4m³ aggregate 0.4 x 3 = 1.2m³ sand 0.2 x 3 = 0.6m³ cement. 3m ³ Concrete at 4:2:1 mix.
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Dry Mix Quantities – Review Above for 1.0m³ of concrete Therefore for 3.0m³ of concrete 0.8 x 3 = 2.4m³ aggregate 0.4 x 3 = 1.2m³ sand 0.2 x 3 = 0.6m³ cement • 3m³ Concrete at 4:2:1 mix. • shrinkage, use 1.4m³ dry for 1.0m³ fluid concrete. • 4+2+1 = 7 parts total • 1.4 x 4 = 0.8m³ 7 1.4 x 2 = 0.4m³ 7 1.4 x 1 = 0.2m³ 7
Quantities Continued • 4.8m³ Concrete at 5:2:1 mix. • shrinkage, use 1.4m³ dry for 1.0m³ fluid concrete. • 5+2+1 = 8 parts total • 1.4 x 5 = 0.875m³ 8 1.4 x 2 = 0.350m³ 8 1.4 x 1 = 0.175m³ 8 • Therefore for 3.0m³ of concrete • 0.875 x 4.8 = 4.2m³ aggregate • 0.350 x 4.8 = 1.680m³ sand • 0.175 x 4.8 = 0.840m³ cement Above for 1.0m³ of concrete
Quantities Continued • 2.5m³ Concrete at 4:2:1 mix. shrinkage, use 1.4m³ dry for 1.0m³ fluid concrete. • 4+2+1 = 7 parts total • 1.4 x 4 = 0.8m³ 7 1.4 x 2 = 0.4m³ 7 1.4 x 1 = 0.2m³ 7 • Therefore for 2.5m³ of concrete • 0.8 x 2.5 = 2.0m³ aggregate • 0.4 x 2.5 = 1.0m³ sand • 0.2 x 2.5 = 0.5m³ cement Above for 1.0m³ of concrete
