Three metakaolins are evaluated for use as supplementary cementitious materials in cement-based systems. The vary mineralogical composition and fabrication (traditional flash calcination), but quite similar their surface area (16–19 m2/g), composition. Performance of metakaolin mixtures will be compared to two control (standard concrete foundation C40/50 high performance C60/75). In this study,...

In this research, a study is made on the Pervious Geopolymer Concrete (PGC), which based local material (Metakaolin). The inclusion of Ordinary Portland Cement (OPC) as partial substitute for Metakaolin (MK) production (PGCs) has also been investigated. concrete was outputted from (MK), and ordinary cement by weight MK silicate sodium (Na2SiO3) hydroxide (NaOH) solution. All PGC samples were cu...

The effect of organic phenol on the compressive and flexural strength of a metakaolin based geopolymer is studied. It was found that 12 wt% phenol resins can increase the compressive and flexural strength by 30% and 65% respectively. In addition, the reinforcing effect of phenol resin is higher in Na-PS and Na-PSS type geopolymers rather than Na-PSDS. Two distinct endothermic peaks were detecte...

The high autogenous shrinkage of alkali-activated materials made from slag and fly ash is recognised as a major drawback with regard to the use construction materials. In this study, metakaolin was introduced into slag-fly (AASF) paste mitigate shrinkage. mitigation mechanism explained by studying influences on microstructure, related properties, mechanical properties AASF paste. It found that ...

This paper explores hybrid alkaline cement composites with high content over 50%. Calcium (Ca) accelerates the strength development and improves compressive of geopolymer. However, mixing proportion Ca in geopolymer has been limited because significantly decreases flow fresh study resolves decline issue by a part initial water before adding it into metakaolin-based geopolymer, which is named (H...