Green concrete are generally composed of recycling materials as hundred or partial percent substitutes for aggregate, cement, and admixture in concrete. To reduce greenhouse gas emissions, efforts are needed to develop environmentally friendly construction materials. Using of fly ash based geopolymer as an alternative binder can help reduce CO2 emission of concrete. The binder of geopolymer con...

This paper discusses the influence of fiber reinforcement on properties geopolymer concrete composites, based fly ash, ground granulated blast furnace slag and metakaolin. Traditional composites are brittle in nature due to low tensile strength. The inclusion fibrous material alters behavior along with a significant improvement mechanical i.e., toughness, strain flexural Ordinary Portland cemen...

Characterizing and understanding the mechanisms underlying geopolymerization are critical in achieving use of sustainable construction material, geopolymer, for widespread commercial production. Non-destructive 1 H NMR relaxometry can provide novel information about as it allows simultaneous detection where water goes how pore structure changes. Coupled with development single-sided devices, me...

Considering the future shortage of natural aggregates, various researchers have promoted recycling by-products into asphalt pavement types. This paper a double-recycling technique, where thermally treated waste silt was used as filler for bituminous skeleton and grouting material geopolymer-based semiflexible pavement. Semiflexible pavements (SFP) inherit flexibility common simultaneously benef...

Abstract Several geopolymer-based materials were produced and characterized by mixing metakaolin, a commercial sodium silicate solution, hydroxide loose waste olivine sand deriving from metallurgical process devoted to the production of high manganese steel. Olivine was added either in as-received form or after thermal treatment at 900 °C. Hardened containing different amounts their behavior co...

In the present work, fly ash geopolymer based composites including polyester (PES) waste were studied. Specimens of three compositions were prepared: (a) fly ash geopolymer with 5% PES waste; (b) fly ash geopolymer mortar with 5% PES waste; (c) fly ash geopolymer mortar with 6.25% PES waste. Compressive and bending strength measurements, water absorption test and determination of thermal conduc...

In this study we report X-ray diffraction and dilatometry results of metakaolin (MK) geopolymers produced with Na, K, Rb or Cs silicate solutions, and cured for 7 days and 5 years, with the aim of identifying variations in structure and performance (dimensional stability at elevated temperature) over an extended curing period at ambient temperature. All of the geopolymers studied are mainly X-r...

The objectives of the present research is to appreciate the effect of synthesizing parameters on setting time and workability of Fly ash based geopolymer paste . Locally available low calcium fly ash from a thermal power plant located near Kolkata, India, was used . Fly ash used are lignite coal based and falls under class F category. The broad areas of present research include: Manufacturing o...

A basic investigation into whether a geopolymer can be utilized as part of an artificial barrier during radioactive waste disposal was conducted in this study. Geopolymers are comprised primarily alumina and silica, they exhibit negligible leaching owing to the absence calcium. Studies on geopolymers limited compared those other cementitious materials because physical characteristics vary with ...