Propiedades físicas y mecánicas de las unidades de albañilería no estructurales de concreto liviano a base de perlas de poliestireno en la ciudad de Iquitos 2021
Date
2021-11-15
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Universidad Científica del Perú
Abstract
El presente proyecto de investigación, tuvo como propósito determinar las propiedades físicas y mecánicas de las unidades de albañilería no estructurales de concreto liviano a base de perlas de poliestireno de diámetro de hasta 4.7mm y arena fina con un módulo de fineza 1.12. Las muestras fueron 30 unidades de bloques de concreto con perlas de poliestireno, las dimensiones de los bloques son 390mm x 190mm x 120mm; corresponde a la norma NTP 399.602 clasificándolas como bloques de concreto para uso no estructural; no obstante las características físicas y mecánicas de estos bloques están establecidas en la Norma Técnica E.070 - Albañilería,2006.
El diseño de mezcla para la elaboración de los especímenes de ensayo fue tomado de la tesis de (Barba y García 2019).
Los ensayos evidenciaron una resistencia a la compresión axial de las unidades de albañilería de 23.53 kg/cm2, así mismo la absorción promedio fue de 12.20% con una variación de la dimensión promedio de -1.9%, concluyéndose que dichos valores cumplen con la norma técnica E 0.70- Albañilería, 2006.
The general objective of this research was to determine the physical and mechanical properties of non-structural masonry units of light concrete. The lightweight concrete was made from fine sand with a 1.12 fineness module, GU type portland cement, polystyrene beads with a diameter of up to 4.7mm, water and plasticizing additive and air incorporator. The sample consisted of 30 units of lightweight concrete blocks. The dimensions of the blocks are 390mm x 190mm x 120mm, which was taken from the NTP 399.602 standard classifying them as concrete blocks for non-structural use. The physical and mechanical characteristics of these blocks were contrasted with the parameters established in the Technical Standard E.070 - Masonry, 2006. To prepare the initial design of the mixture, the designs corresponding to the foam concrete of the thesis of Barba and García (2019) were taken, elaborating the test specimens of the present research with the dosage in weight per cubic meter of the fresh concrete: C = 188.23 kg: AF = 663.41 kg: AL = 6.22 kg: Water = 82.64 lts: Eucocell additive = 0.75 kg: Neoplast additive 8500 HP = 1.51 kg. The tests showed that the foam concrete, used in the elaboration of the blocks, had a density of 960 kg/m3. The masonry blocks achieved an axial compressive strength of 24 kg/cm2; likewise, the average absorption was 12.20%; and, the geometric dimensions had an average variation of -1.9%, concluding that these values comply with the technical standard E 0.70- Masonry, 2006.
The general objective of this research was to determine the physical and mechanical properties of non-structural masonry units of light concrete. The lightweight concrete was made from fine sand with a 1.12 fineness module, GU type portland cement, polystyrene beads with a diameter of up to 4.7mm, water and plasticizing additive and air incorporator. The sample consisted of 30 units of lightweight concrete blocks. The dimensions of the blocks are 390mm x 190mm x 120mm, which was taken from the NTP 399.602 standard classifying them as concrete blocks for non-structural use. The physical and mechanical characteristics of these blocks were contrasted with the parameters established in the Technical Standard E.070 - Masonry, 2006. To prepare the initial design of the mixture, the designs corresponding to the foam concrete of the thesis of Barba and García (2019) were taken, elaborating the test specimens of the present research with the dosage in weight per cubic meter of the fresh concrete: C = 188.23 kg: AF = 663.41 kg: AL = 6.22 kg: Water = 82.64 lts: Eucocell additive = 0.75 kg: Neoplast additive 8500 HP = 1.51 kg. The tests showed that the foam concrete, used in the elaboration of the blocks, had a density of 960 kg/m3. The masonry blocks achieved an axial compressive strength of 24 kg/cm2; likewise, the average absorption was 12.20%; and, the geometric dimensions had an average variation of -1.9%, concluding that these values comply with the technical standard E 0.70- Masonry, 2006.
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Keywords
Poliestireno, Bloques no estructurales, Concreto espuma, Expanded polystyrene, Non-structural blocks, Foam concrete
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