Browsing by Subject "Fly ash"
Now showing items 1-20 of 21
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Analysis of the maturation process of geopolymer mortars
(Institute of Research Engineers and Doctors (the IRED), 2015-04-30)
Article
Open AccessMechanical and maturation of geopolymers mortars based on fly ash –FA¿ (FAM), properties are studied. The values of FAM in compressive strength were lower than conventional Portland cement mortars (PCM). For geopolymers were ... -
Caracterización de la adsorcion de amonio y fosfato mediante zeolitas sintéticas modificadas
(Universitat Politècnica de Catalunya, 2015-04)
Master thesis (pre-Bologna period)
Restricted access - author's decisionEn el contexto legal actual se exige una eliminación del fósforo y nitrógeno casi completa en las aguas residuales. Por otro lado, conseguir recuperar estos nutrientes conllevaría beneficios tanto económicos como ecológicos ... -
Carbonation of ternary building cementing materials
(2012-11)
Article
Restricted access - publisher's policyThe carbonation processes of ettringite and calcium aluminate hydrates phases developed by hydration of calcium aluminate cement, fly ash and calcium sulphate ternary mixtures have been studied. The hydrated samples were ... -
Characterization of ammonium and phosphate adsorption by synthetic zeolite
(Universitat Politècnica de Catalunya, 2015-06)
Master thesis (pre-Bologna period)
Open AccessThe excess of nitrogen and phosphorus in the wastewater has caused crucial distortion in the nature such as eutrophication of water basins, disturbed the ecological balance and spoiled the water quality. Moreover, continuing ... -
Comportamiento químico de cenizas volantes activadas mediante DRX y FTIR
(2014)
Conference report
Open AccessThis work establishing the behavior of geopolymeric materials using X-ray diffraction (DRX) and Infrared Spectroscopy (FTIR). The results show that the geopolymer containing amorphous structure but turn different crystalline ... -
Estudi de la recuperació de fosfats d’aigües residuals amb zeolites sintètiques
(Universitat Politècnica de Catalunya, 2015-06)
Master thesis (pre-Bologna period)
Restricted access - author's decisionEn aquest projecte final de carrera s’estudia la recuperació de fosfats d’aigües residuals mitjançant l’adsorció en zeolites sintètiques i cendres volants de centrals tèrmiques de carbó. Es fan servir dues cendres volants ... -
Estudio de la recuperación de nutrientes de aguas residuales para la producción de fertilizantes low cost
(Universitat Politècnica de Catalunya, 2015-06)
Master thesis (pre-Bologna period)
Restricted access - confidentiality agreement -
Evaluation, comparison and differentiation of geopolymers by studying microstructural
(Institute of Research Engineers and Doctors (the IRED), 2015-04-30)
Article
Open AccessGeopolymers are materials derived from an activation process materials with high content in silicon and aluminum, that in contact with an alkaline solution can acquire cementitious properties, and whose added value is ... -
Experimental study of XRD, FTIR and TGA techniques in geopolymeric materials
(2014)
Conference report
Restricted access - author's decisionThe alkali activation of fly ashes produces a solid and compact material having similar properties to those of portland cement (PC) with characteristics of sustainable high value; these materials with high silica and ... -
Étude des potentialités d’incorporation de fractions ciblées de cendres volantes d’incinérateur dans du ciment comme réactif pouzzolanique
(Universitat Politècnica de Catalunya / Université Libre Bruxelles, 2008)
Master thesis (pre-Bologna period)
Restricted access - confidentiality agreement -
Fly ash as reactive sorbent for phosphate removal from treated waste water as a potential slow release fertilizer
(2017-02-01)
Article
Open AccessThere is interest in recovering phosphate (P(V)) from secondary sources, such as waste water streams for potential use as fertilizers reducing the environmental impacts of P(V) discharges and providing alternative phosphorus ... -
Influence of high volume fly ash and recycled aggregates in chloride and carbonation resistance of concrete
(Centro Internacional de Métodos Numéricos en Ingeniería (CIMNE), 2020)
Conference report
Open AccessThis paper deals with the evaluation of the influence of recycled concrete aggregate (RCA) and the employment of high volume of fly ash (FA) on the physical, mechanical and durability (chloride ion penetration and carbonation) ... -
Multifunctional cork – alkali-activated fly ash composites: a sustainable material to enhance buildings’ energy and acoustic performance
(2020-03-01)
Article
Open AccessThis work evaluates, for the first time, the possibility of producing multifunctional alkali-activated composites combining ultra-low density, low thermal conductivity, high acoustic absorption, and good moisture buffering ... -
Non-dispersive selective extraction of germanium from fly ash leachates using membrane-based processes
(2019-01-07)
Article
Open AccessNon-dispersive selective extraction of Ge(IV) tartrates was carried out from simulated fly ash solutions containing heavy metals through supported liquid membranes (SLM). The optimum transport was obtained using a PTFE ... -
Phosphate recovery by synthetic zeolite and fly-ash: sorption characterization and performance assessment in hybrid sorption-ultrafiltration pilot plant
(Universitat Politècnica de Catalunya, 2015-09)
Master thesis (pre-Bologna period)
Open AccessPhosphorus is a limited global resource; current studies have to be focused mainly on its recovery rather than its disposal. Thereby, the operational lifespan of this resource would be extended and in turn the phosphorus ... -
Phosphate recovery from aqueous solution by K-zeolite synthesized from fly ash for subsequent valorisation as slow release fertilizer
(Elsevier, 2020-08-20)
Article
Restricted access - publisher's policyThe sorption of phosphate by K-zeolites synthesized from fly ash (FA) by hydrothermal conversion is investigated in this study. The aim is the synthesis of Ca bearing K-zeolites to recover phosphate from urban and industrial ... -
Residue strength, water absorption and pore size distributions of recycled aggregate concrete after exposure to elevated temperatures
(2014-10)
Article
Restricted access - publisher's policyIn this paper, the effects of high temperature exposure of recycled aggregate concretes in terms of residual strengths, capillary water absorption capacity and pore size distribution are discussed. Two mineral admixtures, ... -
Steam curing influence on fly ash high-performance recycled concrete
(2016-11)
Article
Restricted access - publisher's policyHigh-performance concrete (HPC) mixtures were produced using 100% coarse recycled concrete aggregates (RCAs) from three different qualities. The concretes were produced using two binders: portland cement and portland cement ... -
Synthesis of hydrous iron oxide/aluminum hydroxide composite loaded on coal fly ash as an effective mesoporous and low-cost sorbent for Cr(VI) sorption: Fuzzy logic modeling
(2017-04-01)
Article
Open AccessThe aim of this research was to estimate the possibility of using synthesized hydrous iron oxide/aluminium hydroxide composite loaded on coal fly ash (FA3) as an efficient sorbent for Cr(VI) sorption from aqueous solution. ... -
Synthesis of zeolites from coal fly ash: an overview
(2002-05-02)
Article
Restricted access - publisher's policyCoal combustion by-products production in USA and EU is estimated in around 115 million tons per year. A large portion of this production is accounted for the coal fly ash (CFA). Cement and concrete manufacturing consumes ...
