Conference Agenda

En el Perú el adobe es el segundo material más empleado en la construcción de viviendas, sin embargo, es uno de los materiales de construcción menos resistentes, por ello se recurre a adiciones o técnicas de compactación para mejorar sus propiedades. La investigación consiste en determinar las propiedades físico-mecánicas de los bloques de tierra comprimida adicionando diferentes porcentajes de cascara de arroz y aserrín. La investigación se realizó comparando las propiedades del bloque patrón sin estabilizar con un bloque con adición de 1%, 3% y 5% de cascara de arroz o aserrín. Para realizar los ensayos se elaboraron bloques prismáticos de 300x150x80 mm, los que luego fueron ensayados a la edad de 28 días. La adición del 5% de cáscara de arroz presenta un incremento de: 72,19 % de la absorción por capilaridad, 58,72 % de la absorción por inmersión total, 72,05 % de la erosión, 91,13 % de la resistencia a compresión y 7,49 % de la resistencia a flexión; en cambio con 5% de aserrín presenta un incremento de 41,75 % de la absorción por capilaridad, 29,11 % de la absorción por inmersión total, 22,50 % de la erosión, 64,64 % de la resistencia a compresión y 6,85 % de la resistencia a flexión. Se concluyó que los bloques estabilizados con cascara de arroz son los más recomendados para la construcción de viviendas debido a que tienen una mayor resistencia a la compresión, superando la resistencia mínima del adobe establecidos en la Norma E.080.

This study evaluates the influence of the mineral addition of microsilica as a partial binder replacement, in combination with the partial substitution of natural aggregates with treated recycled concrete aggregate (TRCA). This process aims to optimize the performance of pervious concrete to mitigate the loss of compressive strength in rigid pavement under rainy conditions while promoting the recycling of old concrete. Natural aggregates were partially replaced by TRCA at a 25% ratio, and cement was replaced with silica fume at concentrations of 0%, 5%, and 7%. Four mixtures were prepared following the ACI 522R-10 standard, with final results showing compressive strengths ranging from 15 to 23 MPa, meeting the requirements of the CE.010 standard. Infiltration rates ranged from 0.84 to 1.19 cm/s, within the allowable range. It is concluded that the use of TRCA along with silica fume improves compressive strength, although it reduces the infiltration rate due to decreased porosity.

The present research project evaluates the compressive strength of concrete f’c = 210 kg/cm², using recycled concrete coarse aggregate (RCCA) sourced from demolition waste at substitution rates of 20%, 25%, and 30%. The physical-mechanical properties of both RCCA and natural aggregate were determined, followed by mix design using the ACI method. The experimental design included a control group (base concrete) and three experimental groups tested at 7, 14, 21, and 28 days. A total of 96 cylindrical specimens were analyzed. Results showed that RCCA concrete surpassed the design strength f’c = 210 kg/cm², achieving an average compressive strength of f’cr = 340.58 kg/cm² at 28 days, with increases of 9.48%, 17.81%, 15.29%, and 16.63% compared to the base concrete. These findings demonstrate that RCCA is viable for structural applications in construction.

The purpose of the current research was to determine the compressive strength of concrete cores with iron, aluminum and copper metal chips replacing 10% of the fine aggregate. The study has a experimental design character, with a total of 72 samples, which were divided into standard concrete, concrete with iron chips, concrete with aluminum chips and concrete with copper chips, having 18 samples for each type of concrete, which were tested at 7, 14 and 28 days of curing. As for the results obtained in the 28-day compressive strength test, it was obtained that the samples with iron chips increased their strength by 6.48%, regarding the standard concrete; on the other hand, the specimens with aluminum chips reduced their strength by 70.52% with respect to the standard concrete, and finally, the specimens with copper chips showed an increase of 2.90% with respect to the standard concrete. In conclusion, the replacement of the fine aggregate by 10% with iron and copper metal chips improved the compressive strength of the concrete f'c=210 kg/cm², while the replacement with aluminum chips reduced the compressive strength of the concrete f'c=210 kg/cm²

The present study focused on the development of a lightweight concrete modified with the incorporation of recycled rubber (RC), with the purpose of improving its physical and mechanical properties for its application in multifamily buildings. The problem addressed arises from the need for a material that combines low density, good workability and resistance suitable for use in multi-family housing, while promoting sustainability through the reuse of rubber waste. In this context, the general objective was to design a lightweight concrete that improves these properties, guaranteeing a balance between structural efficiency and environmental benefits.. lightweight concrete and the impact that the incorporation of recycled materials has on its physical and mechanical properties, in order to evaluate its viability in sustainable structural applications. The study used the deductive scientific method, applied orientation, quantitative approach, descriptive, explanatory, correlational and descriptive level. Experimental, longitudinal, prospective design and cohort study (cause – effect), where the proportions of CR in the concrete were varied. The results obtained indicate that the incorporation of CR improves the workability of the mixture, but reduces the unit weight by up to 35.99% and increases the settlement by 75.00% when 20% of CR is added. In addition, a decrease in the compressive strength of 12.93% and in the tensile strength of 26.67% is observed. The optimal dosage was determined at 5% CR, as it allows a balance to be achieved between better workability and a minimal reduction in strength, with a decrease of 5.6% compared to the control sample.

This study show, the influence of the use of a Portland cement type I, modified with feldspar on the heat of hydration and compressive strength was investigated, to analyze the effect on the heat of hydration, a concrete with a fluid consistency design and compressive strength of f'c = 250 kg / cm2 was prepared, based on Portland cement type I modified with 5%, 10% and 15% with respect to the weight of the cement, to make the analysis the concrete exudation test was performed, for this 12 cylindrical specimens were prepared. The results showed that the greater the addition of feldspar, the less exudation and the heat of hydration tends to increase. However, in the C15F mixture it is observed that there is less exudation and the heat of hydration decreases, which can minimize thermal cracking in massive concretes. Regarding the compressive strength of the mortars, it was shown that with the C10F mixture a resistance 10% higher than the others was obtained.