FIELD: chemistry.
SUBSTANCE: invention relates to geopolymer compositions. A dry mixture for a geopolymer binder contains at least one fly ash containing calcium oxide in amount of less than or equal to 15 wt %, at least one gel formation accelerator and at least one hardening accelerator having a composition different from that of said ash. Said dry mixture prepared by mixing with an activator. A geopolymer concrete or mortar composition obtained by mixing said binder with an aggregate. Methods of preparing a concrete or mortar composition using said binder. The invention is developed in subclaims.
EFFECT: reduced microcracking, maintaining ultimate strength after hardening at low temperature.
50 c, 40 ex, 6 tbl, 3 dwg
