The traditional blocks of baked clay represent 15% of the total production of the ceramics cluster in the Norte de Santander region, with a product typology whose dimensions, shape, weight and price are the most demanded of the market. Its positioning becomes a molding element of the materiality of the architectural covering in the metropolitan area of San José de Cúcuta. This research focuses on the study of two of the most economical and used products in building materials constructions in the city: the blocks manufactured by extruded H-10 of 6 rectangular cavities with market dimensions L: 300 mm, W: 100 mm, H: 200 mm and H-15 of 9 rectangular cavities of size L: 300 mm, W: 150 mm, H: 200 mm and seeks to report its physical-mechanical characteristics to compare the impact of the variables in the units thermal behavior in the enclosure system. This work is carried out by applying 2 methods: in the first phase tests are carried out at the laboratory level using the Norma Técnica Colombiana 4017 and the Norma Técnica Colombiana 4205 to determine the qualitative properties of the building units in each format, and a simulation of temperature distribution and heat flux by finite element method in software ANSYS R16 evaluating the incidence of variables in the heat transfer in a traditional masonry system, evaluating the thermal performance in extreme temperature conditions of 33 °C typical of the region. The results show a difference of 0.709 °C between the thermal behavior between the formats, with a reduction of final thermal energy by the approximate increase of 50 mm in the thickness, this variant presents an opportunity of development to minimize the impacts of the loads of temperature in the envelope, favorable for warm tropical climates.
In Norte de Santander, Colombia, there is a ceramic cluster made up of 59 companies dedicated to the production of construction materials derived from clay, a vernacular material with a wide extraction potential in the region. Fired clay products in different hollow block presentations represent 15% of industrial production, these construction pieces are low cost and show a high demand in the local masonry market, therefore, their thermo-physical characteristics largely build the thermal envelope of “Cucuteña”. This research comparatively evaluates the thermal behavior of four types of ceramic blocks with different perforations, applying the finite element method in thermal simulations that consider a conductivity of 0.407 W/m°C in the ceramic to establish the influence of the shape on the temperature distribution and heat flow profiles of each piece subjected to environmental conditions of a warm semi-arid climate, with average maximum temperatures of 33 °C and an average maximum solar radiation of 796.8 Wh/m2 under extreme climatic conditions in the city of San Jose de Cúcuta, Colombia. The results of the study allow identifying the ceramic block of 6 rectangular holes as the product that, due to its physical characteristics, presents a better alternative to be applied in constructions that seek thermal efficiency.
This research is articulated from the clay framework as material wealth of the region of Norte de Santander, Colombia, and seeks to structure attributes of passive thermal cooling in a ceramic piece for low cost masonry type block cooked with physical, mechanical and thermals feasible characteristics for warm tropical weather conditions of 33 °C on average. This work is based on previous studies that explores the partitions structure morphology in Blocks H10 establishing a model of 6 horizontal cavities for low thermal conductivity and having oblique geometry partitions to interrupt heat conduction by direct thermal bridge inside of the constructive unit called Form-C, which is taken as the object of analysis, adding 5% organic coffee cisco additive in the 95% clay mixture to increase the porosity with a proportion that does not affect the deterioration of the mechanical properties and allow to optimize the thermal insulation capacity regarding to a traditional product. Methodologies: in the first phase, prototypes of Block H10 with Form-A are manufactured by extrusion at the laboratory level as a comparative witness of the properties of a standard piece and Form-C as a piece with thermo-insulating strategies to execute physical-ceramic, geometric evaluations of mechanical resistance and water absorption applying the Norma Técnica Colombiana 4017 for masonry units. In the second stage, simulations of temperature distribution and heat flow are prepared by finite element method in ANSYS R16 software to determine the incidence of the variables in the mixture on heat transfer. The results obtained from thermal simulations show an energy decrease of 1.5 °C on average in relation to Form-A. In conclusion, the use of agro industrial scraps and the implementation of passive design techniques in the ceramic piece generate added value in a product that can be industrialized with improvements in technological properties from a thermal efficiency perspective in construction ceramics.
The architectural envelope constitutes more than the aesthetic expression of the building, currently it represents one of the most important challenges in the configuration of energy efficiency in buildings, the materials that build this skin are responsible for the energy flows that enter the built space, an aspect that becomes especially relevant in tropics climates with warm temperatures up to 33 °C; From this context, the design as an innovation tool allows the configuration of strategies to grant physical properties to the construction units capable of reducing heat transfer through the optimization of its components. Within this investigation, the addition of passive cooling strategies in ceramic pieces designed with sustainable principles is analyzed. As a methodology, thermal simulations are carried out by finite element method considering a thermal conductivity of a ceramic of 0.407 W/m•k applied to three pieces with thermal insulating design to analyze the comparative results in relation to the behavior of temperature distribution and heat flow. This paper presents the results of applying design criteria in innovative pieces for masonry enclosures from the perspective of sustainability based on the thermal properties of a vernacular material, clay, in the Norte de Santander, Colombia.
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