The research investigates the effects of super plasticizer and molarity of sodium hydroxide alkaline solution on the workability, microstructure and compressive strength of self compacting geopolymer concrete (SCGC). SCGC is an improved way of concreting execution that does not require compaction and is made by complete elimination of ordinary Portland cement content. The parameters studied wer...

This paper addresses the question of whether the main product of low calcium fly ash-based geopolymer is a hydrate, namely, sodium aluminosilicate hydrate (N-A-S-H). The answer to this question is important for understanding geopolymer characteristics. One of these is its fire resistance. In this study, fly ash-based geopolymers were synthesized using the combination of Na2CO3 and Ca(OH)2. Samp...

To study effects of several factors on the properties of fly ash based geopolymer concrete on the compressive strength and also the cost comparison with the normal concrete. The test variables were molarities of sodium hydroxide(NaOH) 8M,14M and 16M, ratio of NaOH to sodium silicate (Na2SiO3) 1, 1.5, 2 and 2.5, alkaline liquid to fly ash ratio 0.35 and 0.40 and replacement of water in Na2SiO3 s...

This paper presents workability, compressive strength and microstructure for geopolymer pastes and mortars made of class C fly ash at mass ratios of water-to-fly ash from 0.30 to 0.35. Fluidity was in the range of 145-173 mm for pastes and 131-136 mm for mortars. The highest strengths of paste and mortar were 58 MPa and 85 MPa when they were cured at 70 °C for 24 h. In XRD patterns, unreacted q...

Resin transfer molding of an inorganic polymer binder was successfully demonstrated in the preparation of ceramic fiber reinforced engine exhaust valves. Unfortunately, in the preliminary processing trials, the resulting composite valves were too brittle for in-engine evaluation. To address this limited toughness, the effectiveness of a modified fiber-matrix interface is investigated through th...

The effect of Ca2+ amount and sintering temperature on mechanical properties geopolymer-brushite (GPB) binders was investigated. Brushite raw abandoned kaolinite clay thermally transformed into metakaolin were used for GPB synthesis. complete phase structural analyses performed by X-ray powder diffraction, Fourier transforms infrared spectroscopy (FT-IR). pore-filling as a consequence ions inco...

The focus of this study is the fabrication innovative and sustainable ceramic-based geopolymer with improved low temperatures performances. Kaolin was mixed liquid sodium silicate (Na2SiO3) 12M hydroxide (NaOH) solution using alkali activator ratio 0.24 solid-to-liquid 1:1 to synthesize kaolin geopolymer. effect sintering profile on microstructure, pore evolution flexural strength were investig...

Abstract Organic soil is a problematic that needs to be treated before construction because of the low shear strength and high compressibility. Using by-product materials, such as fly ash (FA), improve soils cost-effective sustainable procedure. Because treatment with FA may lead reduce strength, FA-based geopolymer was used cohesive organic substitute reduction in strength. A series unconfined...

The purpose of this study was to investigate the relationship between molarity and workability in Self-Compacting Geopolymer Concrete (SCGC), as well mechanical properties. Compressive strength split tensile tests are used characterize characteristics research. Additionally, investigates optimal for self-compacting geopolymer concrete. Fly ash lieu cement On new concrete geopolymer, is determin...

Considering the increasing demand for developing alternative construction materials, due to the growing environmental concerns, this paper discusses the feasibility of alkali activated geo-polymer concrete, as a future construction material. The main objective of this study involves observation of structural behaviours of the fresh fly ash-based geo-polymer concrete, understanding the basic mix...