- Q3 44 Points In The Mixing Of Concrete Both The Size Of The Gravel And Thickness Of The Mortar Can Possibly Influence 1 (125.62 KiB) Viewed 33 times
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Q3. (44 points) In the mixing of concrete both the size of the gravel and thickness of the mortar can possibly influence the hardness of the resulting concrete 3 levels of gravel size (factor A) and 3 levels of mortar thickness (factor B) were examined in a carefully controlled experiment. For each combination of gravel size and mortar thickness 4 batches of concrete were mixed and tested for hardness with results shown below. Small Medium Size of gravel (1) Mortar thickness (1) Light Medium 3 3 4 4 12 6 11 8 5 11 5 5 13 5 9 9 7 4 5 3 3 2 6 6 Heavy 16 14 7 10 16 7 9 19 12 4 11 5 large b. Using a = 0.05 compare the hardness of concrete mixed with heavy thickness mortar to the average of that mixed with medium SS(H) HP thickness and light thickness mortar. Hint: Ftab. = 4.21 Fobs = SS(H) 7.1. = 6.92, 7.2. = 5.5, V.3. = 10.83 MSE 2011 = 02 an