Departamento de Ciencias Naturales

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https://hdl.handle.net/20.500.12590/17953

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Browsing Departamento de Ciencias Naturales by Author "Mayta-Ponce, D. L."

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    Fabrication and evaluation of the mechanical behavior of geopolymer compounds using waste from the mining and construction industry
    (IOP Publishing Ltd, 2021) Huamán-Mamani, F. A.; Mayta-Ponce, D. L.; Rodríguez-Guillén, G. P.
    Geopolymers are lately being considered a group of revolutionary materials, due to their good mechanical properties, chemical stability, fire resistance and diversity of applications where they can be used. For the synthesis of geopolymers, a great variety of types of natural and artificial raw materials (residues from other industries) can be used, which allows obtaining materials with very specific applications. Two of the most important industries in Peru are also those that generate greater environmental degradation, mainly due to the waste they generate. The mining industry has a negative impact on the environment, generating a large amount of inorganic waste, while the construction industry does the same, generating large amounts of demolition waste. Both, mining and demolition waste, constitute a serious environmental problem, since currently they are only deposited without any alternative use. Therefore, our research proposes the use of geopolymeric technology for the use of mining and demolition waste in the manufacture of geopolymeric concrete with mechanical strengths similar to that of Portland cement concrete. © 2021 Institute of Physics Publishing. All rights reserved.
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    Mechanical characterization of new geopolymeric materials based on mining tailings and rice husk ash
    (IOP Publishing Ltd, 2021) Huamán-Mamani, F. A.; Mayta-Ponce, D. L.; Rodríguez-Guillén, G. P.
    "This work presents the results of the thermomechanical evaluation of geopolymeric concrete fabricated from mining tailings, rice husk ash and fine sand. Ten types of geopolymeric concrete were studied and the relationship between the initial volumetric concentrations of the components in the mixtures and the maximum resistance in uniaxial compression under conditions of variable temperature (between ambient and 600 ºC) was analyzed. The results revealed that increases in the concentration of mining tailings and fine sand lead to an increase in the value of the maximum mechanical resistance, in contrast, the increase in the concentration of rice husk ash led to a reduction in the value of the maximum mechanical resistance. Furthermore, increases in test temperature, up to 500 °C, led to systematic increases in maximum mechanical strength. Finally, the geopolymeric concretes presented a brittle-ductile transition between 500 and 600 °C showing only a ductile behavior when tested at 600 °C and only brittle up to test temperatures of 500 °C. © 2021 Institute of Physics Publishing. All rights reserved."