The rule of thumb is to consider that a 94 lb. bag of cement will make one cubic foot when it is freshly packed. The density of lightweight concrete is 1920 kg per cubic meter or 116 lbs per cubic foot (3132 lbs per cubic yard).Lightweight concrete weighs less because it is made with an aggregate called pumice, a naturally light mineral.Density is simply a mass to volume ratio.he rule of thumb is to consider that a 94 lb. bag of cement will make one cubic foot when it is freshly packed. The density of lightweight concrete is 1920 kg per cubic meter or 116 lbs per cubic foot (3132 lbs per cubic yard).
amblyopia amÂ·blyÂ·oÂ·piÂ·a (Äm'blÄ-Å'pÄ-É) n. Dimness of vision, especially when occurring in one eye without apparent physical defect or disease.
Lazy Eye (amblyopia) Amblyopia â often called lazy eye â is a problem that is common in children. Amblyopia is a result of the brain and the eyes not working together. The brain ignores visual information from one eye, which causes problems with vision development. Treatment for amblyopia works well if the condition is found early. If untreated, amblyopia causes permanent vision loss.