Reactivity and mechanical performance of geopolymer binders from metakaolin/meta-halloysite blends

Kaolin and halloysite are aluminosilicate materials widely available in Cameroon. The present study aims at investigating the fresh hardened properties of consolidated metakaolin- meta-halloysite blends geopolymer binders cured room temperature (23 ± 3 °C). To produce geopolymers, metakaolin was used as main solid precursor replaced by up to 50 wt%. raw synthesized products were characterized using BET, FX, XRD, FTIR, SEM/EDS, leachability, setting time, mechanical properties, water absorption, porosity bulk density. results revealed that both initial final settings decreased with rise content. Such behaviour is related higher reactivity which led a geopolymerization rate resulting shorter hardening times MK-based binder. Incorporating increased release oligomers alkaline solution favourable for development dense strong matrix explaining high performances. compressive strength density from 30.3 65.2 MPa 1.75 2.12 g.cm?3, respectively. highest performance attained on sample GP50, contained wt% (65.2 MPa) also had (13.02%) absorption (6.72%).