Browsing by Subject "Fly ash"

Now showing items 1-18 of 18

  • Analysis of the maturation process of geopolymer mortars 

    Barreras Miranda, Amid J.; Arredondo Rea, Susana Paola; Gómez Soberón, José Manuel Vicente; Almaral Sánchez, Jorge Luis; Corral Higuera, Ramón (Institute of Research Engineers and Doctors (the IRED), 2015-04-30)
    Article
    Open Access
    Mechanical 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 

    Cheng Cui, Yuanhao (Universitat Politècnica de Catalunya, 2015-04)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    En 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 

    Fernández Carrasco, Lucía; Torrens Martín, David; Martínez Ramírez, Sagrario (2012-11)
    Article
    Restricted access - publisher's policy
    The 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 

    Qiu Zhang, Danni (Universitat Politècnica de Catalunya, 2015-06)
    Master thesis (pre-Bologna period)
    Open Access
    The 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 

    Rosas Casarez,, Carlos Antonio; Arredondo Rea, Susana Paola; Gómez Soberón, José Manuel Vicente; Corral Higuera, Ramón; Almaral Sánchez, Jorge Luis; Chinchillas Chinchillas, Manuel de Jesús; Acuña Agüero, Octavio Humberto; Barreras, A. J.; Morales, C. G.; Apodaca, S.; Orduño, R. (2014)
    Conference report
    Restricted access - author's decision
    This 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 

    Mestres i Sugrañes, Miquel (Universitat Politècnica de Catalunya, 2015-06)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    En 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 

    MAsip Xiol, Xavier (Universitat Politècnica de Catalunya, 2015-06)
    Master thesis (pre-Bologna period)
    Restricted access - confidentiality agreement

  • Étude des potentialités d’incorporation de fractions ciblées de cendres volantes d’incinérateur dans du ciment comme réactif pouzzolanique 

    Comas Barenys, Julia (Universitat Politècnica de Catalunya / Université Libre Bruxelles, 2008)
    Master thesis (pre-Bologna period)
    Restricted access - confidentiality agreement

  • Evaluation, comparison and differentiation of geopolymers by studying microstructural 

    Morales Agundez, Catalina G.; Arredondo Rea, Susana Paola; Gómez Soberón, José Manuel Vicente; Corral Higuera, Ramón; Almaral Sánchez, Jorge Luis (Institute of Research Engineers and Doctors (the IRED), 2015-04-30)
    Article
    Open Access
    Geopolymers 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 

    Rosas Casarez,, Carlos Antonio; Gómez Soberón, José Manuel Vicente; Almaral Sánchez, Jorge Luis; Corral Higuera, Ramón; Chinchillas Chinchillas, Manuel de Jesús; Acuña Agüero, Octavio Humberto; Arredondo Rea, Susana Paola (2014)
    Conference report
    Restricted access - author's decision
    The 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 ...

  • Fly ash as reactive sorbent for phosphate removal from treated waste water as a potential slow release fertilizer 

    Hermassi, Mehrez; Valderrama Angel, César Alberto; Moreno Palmerola, Natalia; Font Piqueras, Oriol; Querol Carceller, Xavier; Batis, Narjes; Cortina Pallás, José Luís (2017-02-01)
    Article
    Open Access
    There 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 ...

  • Non-dispersive selective extraction of germanium from fly ash leachates using membrane-based processes 

    Kamran Haghighi, Hossein; Irannajad, Mehdi; Fortuny Sanromá, Agustín; Sastre Requena, Ana María (2019-01-07)
    Article
    Restricted access - publisher's policy
    Non-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 

    Galera Bella, Marc (Universitat Politècnica de Catalunya, 2015-09)
    Master thesis (pre-Bologna period)
    Open Access
    Phosphorus 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 ...

  • Residue strength, water absorption and pore size distributions of recycled aggregate concrete after exposure to elevated temperatures 

    Kou, Shi-Cong; Poon, Chi-Sun; Etxeberria Larrañaga, Miren (2014-10)
    Article
    Restricted access - publisher's policy
    In 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 

    Gonzàlez Corominas, Andreu; Etxeberria Larrañaga, Miren; Galindo, Anna (2016-11)
    Article
    Restricted access - publisher's policy
    High-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 

    Hosseini Asl, Seyed Mostafa; Masomi, Mojtaba; Hosseini, Morteza; Javadian, Hamedreza; Ruiz Planas, Montserrat; Sastre Requena, Ana María (2017-04-01)
    Article
    Open Access
    The 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 

    Querol, Xavier; Moreno, N.; Umaña, J.C.; Alastuey, A.; Hernández Chiva, Emilio; López-Soler, A.; Plana, F. (2002-05-02)
    Article
    Restricted access - publisher's policy
    Coal 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 ...

  • Temperature for geopolymerization of fly ash. Mechanical behaviour 

    Apodaca García, Sergio; Arredondo Rea, Susana Paola; Gómez Soberón, José Manuel Vicente; Almaral Sánchez, Jorge Luis; Corral Higuera, Ramón (Institute of Research Engineers and Doctors (the IRED), 2015-04-30)
    Article
    Open Access
    Alkali activation of fly ash (FA) is a chemical process which allows the transformation of the amorphous structure which makes up most of its particles, in compact cementitious skeletons geopolymers are called solid ...