The emergence of high-strength graphene marks a new milestone in the material science field. With only small percentage inclusion into matrix system, this organic nanoparticle could tremendously improve strength vast arrays composites. At same time, there is growing interest using low-cost, lightweight, and high early geopolymer as binder for concrete. Compared to traditional Ordinary Portland ...

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 ...

Alkali silica reaction (ASR) occurs due to chemical reaction between hydroxyl ions in the pore water within the concrete matrix and certain forms of silica. This reaction could lead to strength loss, cracking, volume expansion and potentially failure of the structure. This manuscript reports findings of an experimental investigation of the inter-particle bonding between the reactive aggregates ...

This paper discusses the problem of clay shale in construction and need for its improvement. The use geopolymer as a sustainable environmentally friendly solution soil stabilization is presented an alternative to cement-based stabilization. Geopolymers are inorganic aluminum-silicates formed by silicon aluminum can be easily found materials such fly ash mixed with sodium hydroxide silicate. suc...

Abstract Numerous reinforced concrete structures require strengthening due to mistakes in detail engineering design, incorrect execution during construction, or overloading. One method of structural is use haunch beam casted near column. The development infrastructure Indonesia leads an increase cement use. This phenomenon causes a greenhouse effect higher CO 2 emissions, so that effort perform...

Fly ash is industrial residue from the coal combustion in electric and steam generating plants recognized as an environmental pollutant. contains a high concentration of silica alumina can be used geopolymer concrete. Studies use fly concrete mixture has been developing recent decades. This review focuses on characteristics hybrid concrete, its resistance peat environment. The made by activatin...