Curing Times and Temperatures and Mixes

Summer
Outside temperature 76°F and 6.5 bag mix - no blankets.

204 psi at 6hrs → 685 psi at 8hrs

Fall
Outside temperature 50°F and 6.5 bag mix - no blankets.

2911 psi at 72hrs

Winter Test 1
Outside temperature 40°F and 6.5 bag mix no additives, using Super Duty Box Blanket.

1433 psi at 6hrs → 1901 psi at 8hrs

Winter Test 2
Outside temperature 40°F and 7.5 bag mix no additives, using Super Duty Box Blanket.

1138 psi at 5hrs

Winter Test 3
Outside temperature 32°F and 7.5 bag mix 2% calcium, using Super Duty Box Blanket.

4340 psi at 9hrs

Outside temperature 40°F and 7.5 bag mix 2% calcium, 10’x10’ box. Blankets were placed on top and over windows only.

4650 psi at 9hrs