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 "Cuzziramos Gutierréz, Fernando Alonso"

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    Fabrication and Mechanical Behavior of Portland Cement Mortars Reinforced with Ichu Fibers
    (Universidad Católica San Pablo, 2022) Huamán Mamani, Fredy Alberto; Cuzziramos Gutierréz, Fernando Alonso; Palomino Ñaupa, Cris Katherin
    Reinforced Portland cement mortars were manufactured using a mixture of type I cement, fine sand, Ichu (in variable percentages) and water, it was possible to verify the influence of the addition of Ichu fibers on the mechanical response in uniaxial compression of the mortars studied. The mechanical results found revealed a systematic reduction of the maximum mechanical resistance by increasing the volume of Ichu fibers added in the studied mortar mixtures, on the other hand, a greater degree of deformation was evidenced in mortar mixtures with a greater quantity of Ichu fibers added, reaching deformation values of up to 10%. The maximum resistance values found were 0.4 to 3.6 MPa for samples with 16 and 4 Vol.% Of Ichu added, respectively. The microstructure of the mortars studied consisted of a continuous cement binder phase with sand particles and short Ichu fibers dispersed within the binder phase. The real density and average porosity of the mortars reinforced with Ichu was 2.59 g / cm3 and 41%, respectively.
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    Fabrication and Mechanical Evaluation of Geopolymeric Mortars Derived from Inorganic Industrial Waste from Peruvian Formal Mining
    (Universidad Católica San Pablo, 2022) Huamán Mamani, Fredy Alberto; Cuzziramos Gutierréz, Fernando Alonso
    Geopolymeric mortars derived from residues of the Peruvian formal mining industry were manufactured and mechanically evaluated under normal conditions of temperature and atmosphere. The mechanical results found in geopolymeric mortars were compared with those found in conventional Portland cement mortars (control). The values of maximum uniaxial compressive strengths for geopolymeric mortars were between 15.5 and 31.5 MPa, finding the best results when considering a ratio binder:fine sand of 1:2, hardener solution molarity of 20M and a ratio hardener solution:binder of 0.6. The microstructure found for both types of mortars studied (control and geopolymeric) consisted of an interconnected continuous phase of binder (cement or geopolymerized mining tailings) and another discontinuous one of fine sand particles, located within the binder phase.