Making lightweight concrete

Details Making lightweight concrete Making lightweight concrete

B - Operations, Transporting

28

B

25/103

B28B 1/50 (2006.01) C04B 20/12 (2006.01)

Patent

CA 1172835

-10- ABSTRACT OF THE DISCLOSURE MAKING LIGHTWEIGHT CONCRETE Lightweight concrete incorporating expanded polystyrene beads is made by first coating the expanded beads with an aqueous surfactant solution, which preferably contains a substantive cationic surfactant, e.g. a substituted or ethoxylated quaternary ammonium compound containing a C10 to C18 alkyl substituent or an ethoxylated primary or secondary amine having a C10 to C18 alkyl substituent, and a non-ionic surfactant such as an ethoxylated primary or secon- dary alcohol or a nonylphenol - ethylene oxide condensate, The wet beads are coated with dry cement and then mixed with a further supply of cement, water and sand or aggregate to complete the concrete mix.

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