https://docs.google.com/presentation/d/10BajAr8V8E6osBVZ_hw_GmwA4Iu_K9tx/edit?usp=sharing&ouid=108938057700723052405&rtpof=true&sd=true
U-tube link-- LIGHT WEIGHT BRICK'S Part 1, FLY ASH & SILICATE BRICKS
https://youtu.be/wKn0HtIwkA8
LIGHT WEIGHT BRICK'S PART 2, INTERLOCKING TILES, CONCRETE SOLID BLOCKS, HOLLOW CONCRETE /CLAY BRICKS
https://youtu.be/64sf8X_yYIU