The method comprises forming glass pellets, each having a fused generally impervious outer glass skin integral with foamed cellular glass filling and reinforcing the outer skin, and fusing together the outer skins of a number of pellets to form a body and leave interconnected interstitial voids communicating with the exterior surface of the body. These interstitial voids are then impregnated with a cementitious material.
Origin
Unknown
Journal Title
U.S.P 3325341, 13.6.67
Sector
Primary Papers
Class
PP 994