The article at hand presents a novel approach to accelerating the early strength development of mineral-impregnated carbon-fibre composites (MCF) by electrical Joule heating. MCF were produced with metakaolin-based geopolymer suspension and subsequently cured using Ohmic heating under systemically varied voltages durations. characterised in respect their mechanical morphological properties. Thr...

Due to the large contribution of cement production towards CO2 emission and rising concerns regarding climate change, substitution with alternative binders has become an established improve sustainability. Aluminosiliceous polymeric materials, known as geopolymer or alkali activated have been proven achieve a performance good even superior ordinary Portland (OPC). Various source materials poten...

The performance of a fire resistant coating for tunnel passive fire protection under successive severe thermal loading is presented. The material falls under the class of potassium based geopolymers (K-geopolymer) and was prepared by mixing ferronickel (FeNi) slag, doped with pure alumina, with a highly alkaline potassium hydroxide aqueous phase. Its performance was assessed by subjecting a con...

In recent years geopolymers have shown increased interest as binders with low CO2 emission compared to Portland cement. The main goal of this research is focused on connecting green and sustainable characteristics the mechanical chemical properties fly ash-based geopolymer. samples different ratios ash (FA) metakaolin (MK) were prepared. X-ray powder diffraction (XRD) showed that in geopolymer ...

In this study, the mechanical properties of geopolymer mortar composites containing different nanomaterials were investigated. Metakaolin (MK) and fly ash (FA) used as binders in samples. Sodium silicate (Na2SiO3) sodium hydroxide (NaOH) solution (12 M) alkali activators. Multi-walled carbon nanotube (MW-CNT), nano-SiO2 (NS), nano-ZnO (NZ) study. Geopolymer samples without determined control sa...

In order to study the effect of R2O/Al2O3 (where R=Na or K), SiO2/Al2O3, Na2O/K2O and H2O/R2O molar ratios on the compressive strength (CS) of Metakaolin base geopolymers, more than forty data were gathered from literature. To increase the number of data, some experiments were also designed. The resulted data were utilized to train and test the three layer artificial neural network (ANN). Bayes...

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 u...

This study investigated the basic mechanical and microscopic properties of cement produced with metakaolin and quantified the production of residual white efflorescence. Cement mortar was produced at various replacement ratios of metakaolin (0, 5, 10, 15, 20, and 25% by weight of cement) and exposed to various environments. Compressive strength and efflorescence quantify (using Matrix Laborator...

–Flyash based geopolymer concrete is introduced in 1979 by Davidovits to reduce the use of OPC in concrete. Geopolymer is an inorganic alumino-hydroxide polymer synthesized form predominantly silicon and aluminum materials of geological origin and by product materials such as flyash (with low calcium). In this paper an attempt is made to study strength properties of geopolymer concrete using lo...