Abstract: This study was designed to examine the mineral, microstructural, and mechanical strength properties of fly ash and its feasibility as a raw material for geopolymer cement. The study used an experimental method by examining the characteristics of fly ash by X-ray Fluorescence Spectrometer (XRF), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), hydrometer method

Farhan, N., Sheikh, M. Neaz. & Hadi, M. N. S. ( ). Investigation of engineering properties of normal and high strength fly ash based geopolymer and alkali-activated slag concrete compared to ordinary Portland cement concrete. Construction and Building Materials, 196 26-42.

In general, cement based concrete can be replaced by low calcium fly-ash based geopolymer concrete regarding the adverse effect of the manufacture of ordinary Portland cement on environment.

Sep 22,  · In recent years, attempts to increase the utilisation of fly ash to partially replace the use of Portland cement in concrete are gathering momentum. Geopolymer concrete is a ‘new’ material that does not need the presence of Portland cement as a binder. Instead, activating the source materials such as fly ash that are rich in Silicon (Si) and Aluminium (Al) using high alkaline liquids produces the binder

Geopolymer is a material resulting from the reaction of a source material that is rich in silica and alumina with alkaline solution. Geopolymer concrete is totally cement free concrete. In geopolymer, fly ash act as binder and alkaline solution act as an activator. Fly ash and alkaline activator undergo geopolymerization process to produce alumino silicate gel.

Ranjbar et al. have recently produced fly ash-based geopolymer composite with very high compressive strength reaching up to 134 MPa by hot press application (41.4 MPa pressure at 350 °C) in 20 min. An increment in curing temperature results in higher rate of reaction [155] and reduces the setting time of geopolymer pastes [163] .

May 01,  · The Mechanical Properties of Fly Ash-Based Geopolymer Concrete with Alkaline Activators. Construction and Building Materials, Vol. 47, Supplement C , , pp. 409 – 418 . Google Scholar | Crossref

properties of Geopolymer concrete. Percentage increase in compressive strength of SFRGPC was 11%when compared to GPC and 5% compared to HFRGPC [4]. Mehta ( ) studied the influence of GGBS incorporation partially in fly ash based Geopolymer concrete. GGBS incorporated at 5-20% with 5% increment, at 20% GGBS in fly ash based Geopolymer shows

The mechanical properties of fly ash-based geopolymer concrete with alkaline activators. Construction and Building Materials, 47, 409-418. DOI: 10.1016/j.conbuildmat.2013.05.069

Objective: To analyze the effect of variation of Na2O content on the compressive strength and water absorption of geopolymer paste and mortar specimens.Method: Alkali Activator solution was prepared by mixing sodium silicate solution and sodium hydroxide pellets in appropriate proportions 1 day before its use. The prepared solution was mixed with fly ash (FA) for 5 minutes in Hobart Mixer for

205. 2012. Effects of elevated temperatures on the thermal behavior and mechanical performance of fly ash geopolymer paste, mortar and lightweight concrete. OA Abdulkareem, AMM Al Bakri, H Kamarudin, IK Nizar, AS Ala'eddin. Construction and building materials 50, 377-387. , 2014.

Geopolymer concrete (GPC) is an emerging construction material that uses a by-product material such as fly ash as a complete substitute for cement. This paper evaluates the bond strength of fly ash based geopolymer concrete with reinforcing steel. Pull-out test in accordance with the ASTM A944 Standard was carried out on 24 geopolymer concrete and 24 ordinary Portland cement (OPC) concrete

Jun 14,  · Durability of fly ash based geopolymer concrete in the presence of silica fume. Journal of cleaner Production, 149, 1062–1067. View Article Google Scholar 75. Sarker P. K., Haque R., & Ramgolam K. V. ( ). Fracture behaviour of heat cured fly ash based geopolymer concrete. Materials &

D. Hardjito and B. V. Rangan, "Fly Ash-Based Geopolymer Concrete Develoment and properties of low-calcium fly ash-based geopolymer concret," Research Report GC 1, 2005. View at: Google Scholar T. W. Cheng and J. P. Chiu, "Fire-resistant geopolymer produce by granulated blast furnace slag," Minerals Engineering , vol. 16, no. 3, pp. 205

The Report presents a comprehensive summary of the extensive studies conducted on fly ash-based geopolymer concrete. Test data are used to identify the effects of salient factors that influence the properties of the geopolymer concrete in the fresh and hardened states. These results are utilized to propose a simple method for the design of

geopolymer becomes more practical for concrete repair and rehabilitation. The investigations have already been conducted in geopolymer field especially based on fly ash however, most of the

Geopolymerization of fly ash amorphous silica mixtures in 10 M NaOH solution at 100°C for 7 days produced fine aggregates [termed fly ash geopolymer sand (FAPS)] that had comparable grain size distribution, specific gravity, and improved frictional resistance with river sand.

Aug 21,  · A 3 D nonlinear finite element analysis has been used to conduct an analytical study of the heat-cured alkali-activated fly ash-based geopolymer concrete specimens cast with polypropylene fibers. In the experimental part, ten notched beams were investigated in a three-point bending test. three notch height 0, 50, and 75 mm have been

Phenomenological Model for assessment of strength development in class F—Fly ash based geopolymer mortar. Indian Concrete Institute Journal,1, 23-27. Google Scholar Radhakrishna, Shashishankar, A., & Udayashankar, B. C. (2008a). Analysis and assessment of strength development in class F fly ash based compressed geopolymer blocks.

article{osti_22587121, title = {Characterization of geopolymer fly-ash based foams obtained with the addition of Al powder or H{sub 2}O{sub 2} as foaming agents}, author = {Ducman, V., E-mail: [email protected] and Korat, L.}, abstractNote = {Recent innovations in geopolymer technology have led to the development of various different types of geopolymeric products, including highly porous

Geopolymer concrete is environmentally friendly and could be considered as a construction material to promote the sustainable development. In this paper fly ash based geopolymer concretes with different percentages of alccofine were made by mixing sodium hydroxide and sodium silicate as an alkaline activator and cured at ambient as well as heat environment in an electric oven at 90oC.

Fly ash-based geopolymer is expected to be used as a kind of novel green cement. Fly ash-based geopolymer can be used as a class of materials to adsorb and immobilize toxic or radioactive metals. The factors affecting the performances of fly ash-based geopolymer concrete, in particular aggregate, are discussed.

The University of Queensland building uses a geopolymer precast concrete that replaces cement with fly ash and powdered blast furnace slag in the mix. Inset images showcase products and solutions using geopolymer concrete, and a scanning electron micrograph shows the microstructure of a based geopolymer. Cover image source: - The University of

Water - (slag + cement) ratio of 0.35 is used for this test. Fly ash based geopolymer mortar is mixed various proportion of activator. And the tests are made eight times with different activator dosage for fly ash based geopolymer mortar. Then the test is made once again without activator. Water - fly ash ratio of 0.33 is used for this test.

Authors. Astutiningsih, S. Department of Metallurgy and Engineering Materials, Univer-sitas Indonesia, Jakarta ; Rustandi, A. Department of Metallurgy and Engineering Materials, U

May 01,  · Thus the present study focused on using industrial by-products such as red mud, fly ash and ground granulated blast furnace slag (GGBFS) in geopolymer concrete. The objective of this experimental study is to provide a sustainable alternative construction material by geopolymerization of industrial by- products.

The current investigation into the manufacture of Geopolymer concrete using industrial by products such as abundant worldwide availability of fly ash provides the potential to use this by- product of burning coal as a replacement for concrete production by OPC.

Mar 08,  · The results of elastic modulus of 100 % fly ash and fly ash-GGBS based geopolymer concrete from codes; previous literature and the present study are shown in Table 9. It should be noted that, compared to fly ash-based GC fly ash-GGBS synthesized GC specimens are shown greater elastic modulus values. Table 9.

concrete. Among the different fly ash content, the maximum strength is found to be for the geopolymer concrete mix containing the fly ash content of 410 kg/m3. In heat cured specimens, the variation engineering properties of geopolymer concrete iwith the change in fly ash content s found to be nominal.

PAPER OPEN ACCESS Study of mechanical properties of fly ash-based geopolymer concrete To cite this article: H Hardjasaputra et al IOP Conf. Ser.: Mater. Sci. Eng. 615 01 View the article online for updates and enhancements. This content was downloaded from IP address 157.55.39.7 on 06/04/ at 18:07

Fly ash, Crushed sand, Alkaline liquid, Coarse Aggregate, A/F RATIO-0.35, Curing time 95 hours, (TOTAL CUBES 7). PROCEDURE. Mixing of Concrete by A/F RATIO 0.35. Casting 7 cubes of Fly ash Geopolymer concrete. Oven curing in 60. Performed Compression test at 5 hours to 95 hours. Noted difference between strength in each cube.