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Originally posted by Grandpa Troll
What is the Specific Gravity of Water? of Portland Cement? What is the L.A.Abrasion test used for in regards to Coarse Aggregate? What is the difference between Entrapped and Entrained air in fresh portland cement concrete? How many cubic feet in a cubic yard of concrete? What is the acceptable % of Calcium Chlordie in a rebar reinforced slab? When does Plastic Shrinkage cracking occur? What is the chemical reaction called for introduction of water with portland cement? GT When are you getting off of the Vicodan? ![]() ![]() |
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Originally posted by LordShiva
Depends on teh temperature. Correct, I was wondering if anyone actually knew much about this. I am again impressed with your greatness ![]() We use water as the comparitive point to all other ingredients when speaking of and determining theoretical yields in mix design compilation. The use the specific gravity determines what our absolute volume (Theoretical) will be in our mixes for all ingredients, based on tested and historical breaks for each compressive and flexural strength mix we design. |
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Middle English coppeweb : coppe, spider (short for attercoppe, from Old English āttercoppe : ātor, poison + copp, head) + web, web; see web.]
Pretty sure that the proposed physiologic purpose of yawning is to fully expand the lung/inflate the alveoli that are not aerated in quiet respiration -- particularly the shallow respirations taken when about to fall asleep. Also occurs immediately upon awakening to inflate the portions of the lung that are compressed/no aerated during sleep. Not sure why yawning is contagious though. |
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