73 research outputs found
Spent FCC catalyst for preparing alkali-activated binders: an opportunity for a high-degree valorization
No full textSpent FCC catalyst is a waste from the petrochemical industry which has excellent pozzolanic properties, containing more than 90% silica and alumina. Its similarity to metakaolin creates interesting prospects for its use in the production of alkali-activated binders. In this study, the alkali activation of this residue, spent FCC catalyst, through mixtures with alkali hydroxide and silicate solutions (both sodium and potassium) has been carried out. The alkali cation had an important role in the nature of AA-FCC pastes: some differences in the mass loss in the thermogravimetric tests and in the X-ray mineral characterization were found. No significant differences in compressive strength were observed for mortars cured for 3 days in several conditions: room temperature and 65ºC. Prepared AA-FCC mortars had a compressive strength of about 65-70 MPa. Microstructural studies showed that an amorphous, dense and compact microstructure was obtained, independent of the activating solution and curing condition.Mitsuuchi Tashima, M.; Soriano Martinez, L.; Akasaki, JL.; Castaldelli, V.; Monzó Balbuena, JM.; Paya Bernabeu, JJ.; Borrachero Rosado, MV. (2014). Spent FCC catalyst for preparing alkali-activated binders: an opportunity for a high-degree valorization. Key Engineering Materials. 600:709-716. doi:10.4028/www.scientific.net/KEM.600.709S709716600WBCSD – World Business Council for Sustainable Development, Cement industry energy and CO2 performance – Getting numbers right, WBCSD editor, (2009).S. Berger, C.C.D. Coumes, P. le Bescop, D. Damidot, Influence of a thermal cycle at early age on the hydration of calcium sulphoaluminate cements with variable gypsum contents, Cem. Concr. Res. 41-3 (2011) 149-160.I. García-Díaz, J.G. Palomo, F. Puertas, Belite cements obtained from ceramic wastes and the mineral pair CaF2/CaSO4, Cem. Concr. Comp. 33-10 (2011) 1063-1070.M.M. Tashima, L. Soriano, M.V. Borrachero, J. Monzó, C.R. Cheeseman, J. Payá, Alkali activation of vitreous calcium aluminosilicate derived from glass fiber waste, J. Sust. Cem-Based Mater. 1-3 (2012) 83-93.J. Payá, M.V. Borrachero, J. Monzó, L. Soriano, M.M. Tashima, A new geopolymeric binder from hydrated-carbonated cement, Mater. Lett. 74 (2012) 223-225.C. Shi, A. Fernández-Jiménez, A. Palomo, New cements for the 21st century: The pursuit of an alternative to Portland cement, Cem. Concr. Res. 41 (2011) 750-763.P. Duxson, A. Fernández-Jiménez, J.L. Provis, G.C. Lukey, A. Palomo, J.S.J. van Deventer, Geopolymer technology: the current state of the art, J. Mater. Sci. 42 (2007) 2917-2933.A. Fernández-Jiménez, A. Palomo, M. Criado, Microstructure development of alkali-activated fly ash cement: a descriptive model, Cem. Concr. Res. 35 (2005) 1204-1209.J. Payá, J. Monzó, M.V. Borrachero, Fluid catalytic cracking catalyst residue (FC3R) An excellent mineral by-product for improving early-strength development of cement mixtures, Cem. Concr. Res. 29 (1999) 1773-1779.J. Payá, M.V. Borrachero, J. Monzó, L. Soriano, Estudio del comportamiento de diversos residuos de catalizadores de craqueo catalítico (FCC) en cemento Portland, Mat. Construc. 59-296 (2009) 37-52.M.M. Tashima, J.L. Akasaki, V.N. Castaldelli, L. Soriano, J. Monzó, J. Payá, M.V. Borrachero, New geopolymeric binder based on fluid catalytic cracking catalyst residue (FCC), Mater. Lett. 80 (2012) 50-52.A.V. McCormick, A.T. Bell, The solution chemistry of zeolite precursors, Catal. Rev. Sci. Eng. 31 (1989) 97-127
Study of pozzolanic properties of two sugarcane bagasse ash samples from Honduras
No full text[EN] It is well known that the combustion of agricultural waste such as rice husk, bamboo leaf
and bagasse among others, depending on the combustion process, may produce powders with pozzolanic properties. Two samples of sugarcane bagasse ash (SCBA) from Honduras were studied (from Ingenio Santa Matilde, close to the city of San Pedro Sula, and from Ingenio Los Mangos, close to the city of Choluteca). The samples were physico-chemically characterized and pozzolanic reactivity was checked. Both samples of ash have a chemical composition comprising mainly oxides of silicon, iron and aluminum and have similar values of the loss on ignition. Both ashes showed high ability for reacting towards hydrated lime. Moreover, the evolution of the mechanical compressive strength of mortar specimens incorporating these ashes (25% replacement of Portland cement by SCBA) was also studied. Compressive behavior revealed that for this dosage, the cementing efficiency of SCBA is similar to Portland cement.The results suggested that ashes from San Pedro Sula and Choluteca have very good pozzolanic
properties. The cement and concrete industries in Honduras have a huge chance for reusing this type of waste in high quality construction materials.Bonilla Salvador, MM.; Borrachero Rosado, MV.; Monzó Balbuena, JM.; Akasaki, JL.; Ma-Tay, D.; Paya Bernabeu, JJ. (2016). Study of pozzolanic properties of two sugarcane bagasse ash samples from Honduras. Key Engineering Materials. 668:357-366. doi:10.4028/www.scientific.net/KEM.668.357S357366668Payá J., Monzó J., Borrachero M.V. Outstanding aspects on the use of rice husk ash and similar agrowastes in the preparation of binders. I Pro-Africa Conference: Non-Conventional Building Materials Based on Agroindustrial Wastes (Pirassununga, Sao Paulo, Brasil) (2010).Lima S. A., Varum H., Sales A., Neto V. F. Analysis of the mechanical properties of compressedearth block masonry using the sugarcane bagasse ash. Construction and Building Materials 35 (2012) 829-837.Asociación de Productores de Azúcar de Honduras - Innovaciones tecnológicas (2014), Estadísticas. http: /www. azucar. hn/web/?page_id=12.Payá J., Monzó J., Borrachero M.V., Díaz L., Ordóñez L.M. Sugar-cane bagasse ash (SCBA): studies on its properties for reusing in concrete production, Journal of Chemical Technology and Biotechnology 77 (2002) 321-325.Cordeiro G.C., Toledo Filho R.D., Tavares L.M., Fairbairn E.M.R. Pozzolanic activity and filler effect of sugar cane bagasse ash in Portland cement and lime mortars, Cement and Concrete Composites 30 (2008) 410-418.Chusilp N., Jaturapitakkul C., Kiattikomol K. Utilization of bagasse ash as a pozzolanic material in concrete, Construction and Building Materials 23 (2009) 3352-3358.Cordeiro G.C., Toledo Filho R.D., Fairbairn E.M.R. Effect of calcination temperature on the pozzolanic activity of sugar cane bagasse ash, Construction and Building Materials 23 (2009) 3301-3303.Rukzon S., Chindaprasirt P. Utilization of bagasse ash in high-strength concrete, Materials and Design 34 (2012) 45-50.Sua-iam G., Makul N. Use of increasing amounts of bagasse ash waste to produce self-compacting concrete by adding limestone powder waste, Journal of Cleaner Production 57 (2013) 308-319.Villar-Cociña E., Frías M., Valencia-Morales E., Sánchez M.I. Validation of a kinetic-diffusive model to characterize pozzolanic reaction kinetics in sugar cane straw-clay ash/lime systems, Materiales de Construcción 55 (2005) 29-40.Villar-Cociña E., Frías M., Valencia-Morales E., Savastano H. Jr Study of the pozzolanic reaction kinetics in sugar cane bagasse-clay ash/calcium hydroxide system: kinetic parameters and pozzolanic activity, Advances in Cement Research 21 (2009).Payá J., Borrachero M.V., Monzó J., Díaz-Pinzón L., Ordóñez L.M. Sugar-cane bagasse ash (SCBA): studies on its properties for reusing in concrete production, Journal of Chemical Technology and Biotechnology 77 (2002) 321-325.Kyritsis K., Meller N., Hall C. Chemistry and Morphology of Hydrogarnets Formed in Cement-Based CASH Hydroceramics Cured at 200ºC to 350 ºC, Journal of American Ceramic Society 92 (2009) 1105–1111.Donatello S., Tyrer M., Cheeseman C.R. Comparison of test methods to assess pozzolanic activity, Cement and Concrete Composites 32 (2010) 121–127
Preliminary estudies on the use of sugar cane bagasse ash (SCBA) in the manufacture of alkali activated binders
No full textAlkali activated binders require the addition of a mineral-rich amorphous silica and alumina. This paper proposes the use of a mineral residue from the burning of sugar cane bagasse. The alkali activated mixtures were prepared containing binary mixtures of sugar cane bagasse ash (SCBA) and other mineral admixtures: fly ash (FA) or blast furnace slag (BFS). As alkaline activators, mixtures of alkali (Na+ or K+) hydroxide and alkali (Na+ or K+) silicate were used. Alkali-activated pastes and mortars containing binary systems SCBA/FA or SCBA/BFS were prepared and cured at 65 oC. Microstructural properties of these alternative binders were assessed by means of TGA, SEM, XRD and pH measurements. Mechanical strength of mortars was performed after 3 and 7 days at 65 oC. Compressive mechanical strengths of these mortars were in the range 30-55 MPa, showing the good mechanical performance achieved by the alkali activation. Microstructural studies suggested the development of stable matrices and the formation of typical gel.Castaldelli, V.; Mitsuuchi Tashima, M.; Melges, J.; Akasaki, JL.; Monzó Balbuena, JM.; Borrachero Rosado, MV.; Soriano Martínez, L.... (2014). Preliminary estudies on the use of sugar cane bagasse ash (SCBA) in the manufacture of alkali activated binders. Key Engineering Materials. 600:689-698. doi:10.4028/www.scientific.net/KEM.600.689S689698600M.M. Tashima, C.F. Fioriti, J.L. Akasaki, J. Payá, L.C. Sousa, J.L. Pinheiro Melges. High reactive rice husk ash (RHA): production method and pozzolanic reactivity,. Ambiente Construído, 2012, 12: 151-163.L.M. Ordoñez. "Reutilización de la ceniza de cáscara de arroz como material de construcción: Valorización y optimización de sus propiedades puzolánicas (PhD Thesis). Universidad Politécnica de Valencia, (2007).J. Monzó, J. Payá, M.V. Borrachero, A. Córcoles. Use of sewage sludge ash (SSA)-cement admixtures in mortars,. Cem Concr Res 1996; 26(9): 1389-1398.M. García De Lomas, M.I. Sánchez De Rojas, M. Frías. Pozzolanic reaction of a spent fluid catalytic cracking catalyst in FCC-cement mortars,. J Therm Anal Calorim 2007, 90: 443-447.J. Payá, J. Monzó, M.V. Borrachero. Fluid catalytic cracking catalyst residue (FC3R) An excellent mineral by-product for improving early-strength development of cement mixtures,. Cem Concr Res 1999; 29: 1773-1779.F. Puertas, I. García-Díaz, A. Barba, M.F. Gazulla, M. Palacios, M.P. Gómez, S. Martínez-Ramírez. Ceramic wastes as alternative raw materials for Portland cement clinker production,. Cem Concr Comp 2008 30(9): 798-805.C. Shi, A. Fernández-Jiménez, A. Palomo. New cements for the 21st century: The pursuit of an alternative to Portland cement,. Cem Concr Res 2011; 41: 750-763.P. Duxson, A. Fernández-Jiménez, J.L. Provis, G.C. Lukey, A. Palomo, J.S.J. van Deventer. Geopolymer technology: the current state of the art,. J Mater Sci 2007; 42: 2917-2933.M. Frías, E. Villar-Cociña, E.V. Morales, H. Savastano. Study of the pozzolanic reaction kinetics in sugar cane bagasse–clay ash/calcium hydroxide system: kinetic parameters and pozzolanic activity,. Adv Cem Res 2009; 21(1): 23-30.G.C. Cordeiro, R.D. Toledo Filho, E.M.R. Fairbairn. Effect of calcination temperature on the pozzolanic activity of sugar cane bagasse ash,. Constr Build Mater 2009; 23(10): 22-28.J. Payá, J. Monzó, M.V. Borrachero, L. Díaz-Pinzón, L.M. Ordoñez. Sugar-cane bagasse ash (SCBA): studies on its properties for reusing in concrete production,. J Chem Tech Biotech 2002; 77(3): 321-325.G.C. Cordeiro, R.D. Toledo Filho, L.M. Tavares, E.M.R. Fairbairn, E.M.R. Pozzolanic activity and filler effect of sugar cane bagasse ash in Portland cement and lime mortars,. Cem Concr Comp 2008; 30(5): 410-418.J. Payá. La transmutación sostenible de los residuos para nuevas materias primas en el ámbito del concreto,. Dyna 2012; 79: 38-47
Mechanical strength of lime-rice Husk ash mortars: A preliminary study
No full textRice is produced in many countries in the world, and this product permits to feed a lot of people, most of them in developing countries. Approximately one tone of rice produces 200 Kg of rice husk, and when this rice husk is burnt 20% of rice husk ash (RHA) is obtained. A very important part of rice husk is abandoned in the field producing environmental problems. RHA can be obtained by controlled combustion, when this fact occurs, a good quality RHA is produced. This RHA can be used as a pozzolanic material in mixtures with lime or Portland cement, producing good mechanical properties and durability. In this work a preliminary results about the influence of RHA/lime ratio on
workability and mortars strength was studied. The results showed that mortars workability improves when RHA/lime ratio do. Compressive strength (Cs) of mortars with different RHA/lime ratios was studied, in this sense, for 28 days curing time at 20ºC an increase of Cs when RHA/lime ratio do is observed. However for 90 and 180 days curing time a maximum or Cs for RHA/lime equal to 2 is obtained. The lowest and highest Cs values obtained were 6 and 18 MPa respectively, when 20ºC curing temperature was used. When curing temperature increases until 65ºC similar tendency of Cs respecting RHA/lime ratio was observed. A preliminary study of binders for using in mortars tiles
reveals that at least low quantities of Portland cement must be included in binder composition in order to obtain short term strengths that make easy tile demoulding process.Mendez Mutschler, RF.; Borrachero Rosado, MV.; Paya Bernabeu, JJ.; Monzó Balbuena, JM. (2012). Mechanical strength of lime-rice Husk ash mortars: A preliminary study. Key Engineering Materials. 517:495-499. doi:10.4028/www.scientific.net/KEM.517.495S495499517Salas, J., Latinoamérica: Hambre de vivienda,. Boletín del Instituto de la Vivienda, mayo 2002, vol. 17, number 045. Universidad de Chile, Santiago. Chile. page. 58-69.Méndez R., Tabora J., Borrachero M.V., Payá J., Monzó J.: Optimización de mezclas cal-puzolana destinadas a la construcción de materiales prefabricados no convencionales,. II Simposio Aprovechamiento de residuos agro-industriales como fuente sostenible de materiales de construcción. Valencia, nov. (2010).Martirena, J.F., Una alternativa ambientalmente compatible para disminuir el consumo de aglomerantes de clínker de cemento Portland: el aglomerante cal-puzolana como adición mineral activa, 2004, Universidad Central Marta Abreu de las Villas (UCLV).V.M. Malhotra, P.K. Mehta, Pozzolanic and Cementitious Materials, Gordon & Breach Publishers, Amsterdam, (1996).K. Kamiya, A. Oka, H. Nasu, T. Hashimoto, Comparative study of structure of silica gels from different sources, Journal of Sol-Gel Science and Technology 19 (2000) 495–499.P.K. Mehta, Siliceous ashes and hydraulic cements prepared there from, U.S. Patent, (1978).J.S. Coutinho, The combined benefits of CPF and RHA in improving the durability of concrete structures, Cement&Concrete Composites 25 (2003) 51–59.M.H. Zhang, V.M. Malhotra, High-performance concrete incorporating rice husk ash as a supplementary cementing material, Aci Materials Journal 93 (1996) 629–636.Deepa G. Nair a, K.S. Jagadish b, Alex Fraaij, Reactive pozzolanas from rice husk ash: An alternative to cement for rural housing, Cement and Concrete Research 36 (2006) 1062–1071.A. Izaguirre a, J. Lanas b, J.I. Álvarez Ageing of lime mortars with admixtures: Durability and strength assessment, Cement and Concrete Research 40 (2010) 1081–1095
A binder from alkali activation of FCC waste: use in roof tiles fabrication
No full textNowadays, scientific community is looking for alternatives to reduce the problem of CO2
emissions, making more sustainable binders and reusing wastes from other industries.
In this line, the technology of geopolymers was born, in which, binders based on alkali-activation can be produced entirely or almost entirely from waste materials. In alkali-activation a source of aluminosilicate is dissolved by a highly alkaline solution previous to precipitation reactions that form a gel binder. The use of alumino-silicate minerals such as metakaolin, blast furnace slag and fly ash to produce alkali-activated cements has been extensively studied and it s increasing the interest in investigating the suitability of using other materials. Different wastes containing silica and alumina, such as hydrated-carbonated cement, glass, fluid catalytic cracking catalyst residues (FCC) have been
activated. The aim of this study is to verify if the use of geopolymers is compatible with the manufacturing technology of typical building elements, in this case roof tiles. Mechanical properties of mortars and roof tiles using as source of aluminosilicates FCC have been studied, with different mixtures and variating the proportions of NaOH and waterglass. Compressive strength development was evaluated in mortars cured at 20ºC for 7 and 28 days and flexural strength, impermeability and impact resistance were evaluated in roof tiles. The results obtained demonstrated the feasibility on the use of geopolymers in the design of new products with less CO2 emissions and then the contribution to the sustainability in the construction sector.Mas, MA.; Mitsuuchi Tashima, M.; Paya Bernabeu, JJ.; Borrachero Rosado, MV.; Soriano Martinez, L.; Monzó Balbuena, JM. (2016). A binder from alkali activation of FCC waste: use in roof tiles fabrication. Key Engineering Materials. 668:411-418. doi:10.4028/www.scientific.net/KEM.668.411S411418668J. W. Phair. (2006). Green chemistry for sustainable cement production and use,. Green Chem. 8, 763–780.Mahasenan N, Smith S, Humphreys K. Kaya Y. (2003).Shi C, Jiménez AF, Palomo A. (2011) New cements for the 21st century: the pursuit of an alternative to portland cement, Cement Concr Res 41: 750–63.Palomo A, Grutzeck MW, Blanco MT. (1999) Alkali-activated fly ashes: a cement for the future,. Cement Concr Res 29: 1323–9.Fernandez-Jimenez A, García-Lodeiro I, Palomo A. (2007) Durability of alkali-activated fly ash cementitious materials, J Mater Sci 42: 3055–65.Davidovits J. (1991) "Geopolymers - Inorganic Polymeric New Materials, J Therm Anal Calorim 37: 1633–56.Davidovits J. (1994) "Geopolymers: Man-Made rock geosynthesis and the resulting development of very early high strength cement J Mater Educ 91–139.Xu H, Van Deventer JSJ. (2000) The geopolymerisation of alumino-silicate minerals, Int J Min Process 59: 247–66.Lee WKW, van Deventer JSJ. (2002) Structural reorganisation of class F fly ash in alkaline silicate solutions, Colloid Surface Physicochem Eng Aspect 211: 49–66.van Deventer J, Provis J, Duxson P, Brice D. (2010) Chemical research and climate change as drivers in the commercial adoption of alkali activated materials, Waste Bio Val 1: 145–55.M. M. Tashima, J. L. Akasaki, V. N. Castaldelli, L. Soriano, J. Monzó, J. Payá and M. V. Borrachero, (2012), New geopolymeric binder based on fluid catalytic cracking catalyst residue (FCC), Mater. Lett., 80, 50–52.E. D. Rodriguez, S. A. Bernal, J. L. Provis, J. D. Gehman, J. Monzó, J. Payá and M. V. Borrachero (2013), Geopolymers based on spent catalyst residue from a fluid catalytic cracking (FCC) process, Fuel, 109, 493–502.M. M. Tashima, L. Soriano, J. Monzó, M. V. Borrachero and J. Payá, (2013) Novel geopolymeric material cured at room temperature, Adv. Appl. Ceram., 2013, 112, 179–183.M. M. Tashima, J. Payá, J. L. Akasaki, J. Monzó, J. L. P. Melges, L. Soriano and M. V. Borrachero, (2013).Payá J, Borrachero M, Monzó J, Soriano L (2009) Studies on the behavior of different spent fluidized-bed catalytic cracking catalysts on Portland cement,. Mater Constr 59: 37–52.Méndez R., Borrachero M.V., Payá J. and Monzó J. (2012) Mechanical Strength of Lime-Rice Husk Ash Mortars: A Preliminary Study, Key Engineering Materials, Vol. 517, pp.495-499.Melendez M., Espinosa O., Rhyner K., Noboa M. (2004). El techo que cubre el mundo: la teja de microconcreto, Ed. Ecosur. (in spanish). Information on http: /www. ecosur. org/index. php/ publicaciones/category/1-manuales pp.7-27.Melendez M., Espinosa O., Rhyner K., Noboa M. (2004). El techo que cubre el mundo: la teja de microconcreto, Ed. Ecosur. (in spanish). Information on http: /www. ecosur. org/index. php/ publicaciones/category/1-manuales pp.88-90
Nonlinear Acoustic Spectroscopy and Frequency Sweep Ultrasonics: Case on Thermal Damage Assessment in Mortar
No full text[EN] An exhaustive study on thermal damage of Portland cement-based materials is addressed. Damage carried out at different temperatures on concrete between 40 and 525 degrees C were assessed by means of microstructural, physical and nondestructive tests. Microstructural analysis (thermogravimetry and scanning electron microscopy) showed the principal changes of the Portland cement hydrated products for the different analysed temperatures. Compressive and flexural strengths remained constant or even increased at a low heating temperature range, while the mass loss increases. Dilatometry analysis revealed important information about deformation incompatibilities between the paste and the aggregate. These results have been correlated with nondestructive tests: nonlinear impact resonance acoustic spectroscopy (NIRAS) and ultrasonic measures. The dynamic modulus and ultrasonic pulse velocity have closely predicted the linear stiffness decay of the specimens. However, hysteretic parameter from NIRAS analysis exhibited a different trend from stiffness-related parameters, keeping constant until 250>degrees C and suffering a huge increasing for 400 and 525 degrees C. Ultrasonic attenuation computed with a broadband ultrasonic signal (chirp) revealed interesting information about scattering components inside the material, and is sensitive to interfacial transition zone between aggregate and paste in a large range of frequencies. The correlation between microstructural, mechanical and nondestructive techniques were carried out successfully. Nonlinear vibration and ultrasonic attenuation are non-conventional parameters that gave specific information about a complex damage process, such as a thermal attack in highly heterogeneous materials (e.g. Portland cement composites).This work has been supported by the Spanish Administration under Grants, BES2015-071469, under the ONDATEST coordinated project, BIA2014-55311-C2-1-P and BIA2014-55311-C2-2-P. Thanks are given to FEDER funds for co-funding.Genovés, V.; Carrión García, A.; Escobar, D.; Gosálbez Castillo, J.; Monzó Balbuena, JM.; Borrachero Rosado, MV.; Paya Bernabeu, JJ. (2019). Nonlinear Acoustic Spectroscopy and Frequency Sweep Ultrasonics: Case on Thermal Damage Assessment in Mortar. Journal of Nondestructive Evaluation. 38(3):1-14. https://doi.org/10.1007/s10921-019-0599-0S114383Aïtcin, P.C.: Binders for Durable and Sustainable Concrete. Taylor & Francis, London (2008)Ma, Q., Guo, R., Zhao, Z., Lin, Z., He, K.: Mechanical properties of concrete at high temperature—a review. Constr. Build. Mater. 93, 371 (2015)Schneider, U.: Concrete at high temperatures—a general review. Fire Saf. J. 13(1), 55 (1988)Cruz, C.R., Gilien, M.: Thermal expansion of Portland cement paste, mortar and concrete at high temperatures. Fire Mater. 4(2), 66 (1980)Jay, A.H.: The thermal expansion of quartz by X-ray measurements. Proc. R. Soc. Lond. 142(846), 237 (1933)Malhotra, V., Carino, N.: Handbook on Nondestructive Testing of Concrete. Civil Engineering. CRC Press, Boca Raton (2004)Van Den Abeele, K., Carmeliet, J., Ten Cate, J.A., Johnson, P.: Nonlinear elasticwave spectroscopy (NEWS) techniques to discern material damage. Part I: nonlinear wave modulation spectroscopy (NWMS). Res. Nondestruct. Eval. 12(1), 17 (2000)Johnson, P.A., Sutin, A.: Nonlinear elastic wave NDE I. Nonlinear resonant ultrasound spectroscopy and slow dynamics diagnostics. In: AIP Conference Proceedings (2005)Leśnicki, K.J., Kim, J.Y., Kurtis, K.E., Jacobs, L.J.: Characterization of ASR damage in concrete using nonlinear impact resonance acoustic spectroscopy technique. NDT & E Int. 44(8), 721 (2011)Park, S.J., Yim, H.J., Kwak, H.G.: Nonlinear resonance vibration method to estimate the damage level on heat-exposed concrete. Fire Saf. J. 69, 36 (2014)Dahlen, U., Ryden, N., Jakobsson, A.: Damage identification in concrete using impact non-linear reverberation spectroscopy. NDT & E Int. 75, 15 (2015)Genovés, V., Carrión, A., Gosálbez, J., Bosch, I., Borrachero, M.V., Payá, J.J.: Optimized ultrasonic attenuation measures for internal sulphate attack monitoring in Portland cement mortars (1)Genovés, V., Gosálbez, J., Carrión, A., Miralles, R., Payá, J.: Optimized ultrasonic attenuation measures for non-homogeneous materials. Ultrasonics 65, 345 (2016)Philippidis, T.P., Aggelis, D.G.: Experimental study of wave dispersion and attenuation in concrete. Ultrasonics 43(7), 584 (2005)Molero, M., Segura, I., Aparicio, S., Hernández, M.G., Izquierdo, MaG: On the measurement of frequency-dependent ultrasonic attenuation in strongly heterogeneous materials. Ultrasonics 50(8), 824 (2010)Genovés, V., Vargas, F., Gosálbez, J., Carrión, A., Borrachero, M., Payá, J.: Ultrasonic and impact spectroscopy monitoring on internal sulphate attack of cement-based materials. Mater. Design 125(Suppl C), 46 (2017)Park, G.K., Yim, H.J.: Evaluation of fire-damaged concrete: an experimental analysis based on destructive and nondestructive methods. Int. J. Concr. Struct. Mater. 11(3), 447 (2017)Payan, C., Ulrich, T., Le Bas, P., Griffa, M., Schuetz, P., Remillieux, M., Saleh, T.: Probing material nonlinearity at various depths by time reversal mirrors. Appl. Phys. Lett. 104(14), 144102 (2014)Payan, C., Ulrich, T.J., Le Bas, P.Y., Saleh, T., Guimaraes, M.: Quantitative linear and nonlinear resonance inspection techniques and analysis for material characterization: application to concrete thermal damage. J. Acoust. Soc. Am. 136(2), 537 (2014)Payan, C., Garnier, V., Moysan, J., Johnson, P.: Applying nonlinear resonant ultrasound spectroscopy to improving thermal damage assessment in concrete. J. Acoust. Soc. Am. 121(4), EL125 (2007)Yim, H.J., Kim, J.H., Park, S.J., Kwak, H.G.: Characterization of thermally damaged concrete using a nonlinear ultrasonic method. Cem. Concr. Res. 42(11), 1438 (2012)Borrachero, M.V., Payá, J., Bonilla, M., Monzó, J.: The use of thermogravimetric analysis technique for the characterization of construction materials. J. Therm. Anal. Calorim. 91, 503–509 (2008)Genovés, V., Soriano, L., Borrachero, M., Eiras, J., Payá, J.: Preliminary study on short-term sulphate attack evaluation by non-linear impact resonance acoustic spectroscopy technique. Constr. Build. Mater. 78, 295 (2015)Krautkrämer, J., Krautkrämer, H.: Ultrasonic Testing of Materials. 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Physical, chemical and mechanical properties of fluid catalytic cracking catalyst residue (FC3R) blended cements
No full textUltrasonic and impact spectroscopy monitoring on internal sulphate attack of cement-based materials
No full text[EN] An exhaustive monitoring of an internal sulphate attack of Portland cement-based materials is addressed. Four series of Portland cement mortars with different amounts of gypsum (0%¿2% SO3 respect to the cement
by mass) were monitored by means of physical, microstructural and non-destructive tests, studying specimens
with a low expansion rate to examine the sensitivity of the applied techniques. The expansion analysis has shown the suitability of a fitting model, allowing the examination of two characteristic parameters: the characteristic time of the expansion reaction and the maximum amplitude of the expansion. In the mechanical analysis, higher values of Rc and Rf were attained as the gypsum content decreased. A microstructural analysis (thermogravimetry and FESEM) supported ettringite formation and expansion process. These results have been correlated with non-destructive tests: impact resonance acoustic spectroscopy and ultrasonic measures. The dynamic modulus and ultrasonic pulse velocity have closely predicted the stiffness of the specimens. The total material attenuation (absorbed energy of the chirp signal ultrasonic wave) presented different trends, showing clear differences for the most damaged series (2% SO3). Attenuation supplied interesting information about the hardening process and the microcracking effect due to a mortar expansion higher than 0.04%. The novelties of this study are the exhaustive monitoring of an internal sulphate attack, as well as the examination of the sensitivity of brand new NDT techniques when this
damage process overlaps with the curing process.This work has been supported by the Spanish Administration under grants TEC2011-23403, BIA2014-55311-C2-1-P and BIA2014-55311-C2-2-P.Genovés Gómez, V.; Vargas, F.; Gosálbez Castillo, J.; Carrión García, A.; Borrachero Rosado, MV.; Paya Bernabeu, JJ. (2017). Ultrasonic and impact spectroscopy monitoring on internal sulphate attack of cement-based materials. Materials & Design. 125:46-54. https://doi.org/10.1016/j.matdes.2017.03.068S465412
A 100% waste-based alkali-activated material by using olive-stone biomass ash (OBA) and blast furnace slag (BFS)
No full text[EN] This study presents the use of olive-stone biomass ash (OBA) as an alkali source in alkali-activated materials (AAM) based on blast furnace slag (BFS). The OBA was physically and chemically characterized. It presented high K2O and CaO contents, and yielded high alkalinity in water medium. The newly designed OBA + BFS mixes (a 100% waste-based AAM) reached a compressive strength of 30 MPa after 7 days of curing at 65 ºC, which was higher than for BFS activated with KOH solution. Thermogravimetric studies showed the formation of C-S-H/(C,K)-A-S-H gels and hydrotalcite. The OBA presented excellent performance as a component in AAM and a good valorisation was achievedFont-Pérez, A.; Soriano Martínez, L.; Moraes, J.; Tashima, M.; Monzó Balbuena, JM.; Borrachero Rosado, MV.; Paya Bernabeu, JJ. (2017). A 100% waste-based alkali-activated material by using olive-stone biomass ash (OBA) and blast furnace slag (BFS). Materials Letters. 203:46-49. https://doi.org/10.1016/j.matlet.2017.05.129S464920
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