57deflection in 39 35 25 25at hi humid parallel lbs 37 5 33 35 40deflection in 85 1 0 1 0 9twist failure ins face 3 8 15 8 2 8 0 back 1 8 16 8 3 8 5 8punch lbs dry 830 647 817 828 hi humid 565 427 553 560nail pull through lbs dry 146 123 146 136 5 hi humid 111 5 81 5 121 5 107 5field hardness hunter lbs dry 17 1 13 4 16 5 15 9 hi humid 11 6 10 1 12 1 13 1a s t m c 473 tests core hardness lbs dry 35 5 29 5 40 36 hi humid 31 3 21 6 27 27end hardness lbs dry 33 3 28 8 36 7 38 3 hi humid 26 8 23 7 28 3 32 2edge hardness lbs dry 34 6 29 3 39 8 40 3 hi humid 27 2 21 7 28 5 30______________________________________ ______________________________________ with regular acceleratorcore slurry tests after test run______________________________________wet density lbs cu ft 66 0dry density lbs cu ft 47 8dry compressive strength psi 629slurry setting time vicat sec 160 with subject accelerator one third of two thirds of way through way through test run test run______________________________________wet density lbs cu ft 63 8 64 3dry density lbs cu ft 44 9 44 0dry compressive strength psi 693 694slurry setting time vicat sec 120 150______________________________________ ______________________________________accelerator machine mix set with 200 gefficiency test hemihydrate gypsum ______________________________________regular accelerator 5 grams yielded 180 sec set timesubject accelerator 1 gram yielded 230 sec set time______________________________________ it will be seen that the dry compressive strengths of cubes taken when the subject accelerator of the invention was in use were.