cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7215707.v1
title: Infiltration detection in internal areas of buildings using infrared thermography: case study

description: Abstract Infrared thermography is a non-destructive inspection technique with increasing use in construction works. Its specific application in detecting infiltrations is still in development. The main objective of this study is to verify the applicability of infrared thermography in the detection of humidity in internal areas that present this pathological manifestation or minimal signs related to this problem. Internal inspections were carried out in case studies located in areas vulnerable areas to infiltration. The study was conducted passively during the rainy season. The results show that detection is possible during the day, without difficulties, where the areas affected by the infiltration present lower temperatures than the areas without humidity. The researchers observed that the larger the temperature difference, the greater the clarity of the thermal imaging. However, the coating of the inspected surfaces may interrupt the formation of the thermal contrasts, reducing the quality of the results. Infrared thermography is a useful tool for detecting non-visible or early-stage infiltrations because it provides location and affected area information, but certain factors must be considered for effective inspection as the external environmental conditions of the study site, camera specifications and infiltration characteristics.
DOI: 10.6084/m9.figshare.7215953
title: Evaluation of recycled concrete with concrete coarse aggregate using ABCP mix design method modified

description: Abstract The use of recycled aggregate from construction and demolition waste is growing throughout the world. However, the adoption of a mix design method that does not take into account the type of recycled aggregate (RA), the best RA content in the mix proportion, and the best way to evaluate workability can hinder its application. Hence, the main goal of this study is to develop a specific mix design of recycled concrete, using the flow test on Graff's Table as a measure of workability. The mix design adopted was an adaptation of the ABCP (Brazilian Portland Cement Association) method. The RA proportions were 20% and 40%. In addition, the influence of two levels of flow test (350 mm and 400 mm) and three different mix design strength levels (25, 30 and 40 MPa) were also tested.The results showed it was necessary to make many experimental adjustments in the concrete mixtures determined by the ABCP method. On the other hand, the flow test on the Graff's table proved to be satisfactory as a measure of recycled concrete workability in this study. The two flow test levels evaluated had a significant influence on the compressive strength results, while the RA contents evaluated (20% and 40%) did not affect this property.
DOI: 10.6084/m9.figshare.7215953.v1
title: Evaluation of recycled concrete with concrete coarse aggregate using ABCP mix design method modified

description: Abstract The use of recycled aggregate from construction and demolition waste is growing throughout the world. However, the adoption of a mix design method that does not take into account the type of recycled aggregate (RA), the best RA content in the mix proportion, and the best way to evaluate workability can hinder its application. Hence, the main goal of this study is to develop a specific mix design of recycled concrete, using the flow test on Graff's Table as a measure of workability. The mix design adopted was an adaptation of the ABCP (Brazilian Portland Cement Association) method. The RA proportions were 20% and 40%. In addition, the influence of two levels of flow test (350 mm and 400 mm) and three different mix design strength levels (25, 30 and 40 MPa) were also tested.The results showed it was necessary to make many experimental adjustments in the concrete mixtures determined by the ABCP method. On the other hand, the flow test on the Graff's table proved to be satisfactory as a measure of recycled concrete workability in this study. The two flow test levels evaluated had a significant influence on the compressive strength results, while the RA contents evaluated (20% and 40%) did not affect this property.
DOI: 10.5281/zenodo.6623720
title: Muusoctopus leioderma decontaminated gx

description: .
DOI: 10.6084/m9.figshare.7215626
title: Study of bond stress between steel bars and red ceramic waste aggregate concretes

description: Abstract The use of alternative materials in the production of concrete can be one of the viable solutions for sustainability in the construction industry. It is therefore necessary to study the mechanical properties of the new concrete mixture, produced with those materials. This study evaluates the bond strength between steel bars and concretes produced with aggregates from red ceramic waste, aiming to use this alternative mixture in the production of reinforced concrete structural elements. For this purpose, four concrete mixtures were produced; one reference, without any replacement, and three other mixtures with gradual replacement of the coarse aggregate by a red ceramic waste aggregate (20%, 40% and 100% replacement, by volume). Twelve beams, three for each studied concrete mixture, were made and evaluated in the laboratory according to the testing method recommended by RILEM-CEB-FIP (1983). The results obtained, regarding the bond strength between steel bar and concrete, indicated the viability of using red ceramic waste as a replacement for part of the coarse aggregate in the production of concrete for structural purposes.
DOI: 10.6084/m9.figshare.7215626.v1
title: Study of bond stress between steel bars and red ceramic waste aggregate concretes

description: Abstract The use of alternative materials in the production of concrete can be one of the viable solutions for sustainability in the construction industry. It is therefore necessary to study the mechanical properties of the new concrete mixture, produced with those materials. This study evaluates the bond strength between steel bars and concretes produced with aggregates from red ceramic waste, aiming to use this alternative mixture in the production of reinforced concrete structural elements. For this purpose, four concrete mixtures were produced; one reference, without any replacement, and three other mixtures with gradual replacement of the coarse aggregate by a red ceramic waste aggregate (20%, 40% and 100% replacement, by volume). Twelve beams, three for each studied concrete mixture, were made and evaluated in the laboratory according to the testing method recommended by RILEM-CEB-FIP (1983). The results obtained, regarding the bond strength between steel bar and concrete, indicated the viability of using red ceramic waste as a replacement for part of the coarse aggregate in the production of concrete for structural purposes.
DOI: 10.5281/zenodo.6623719
title: Muusoctopus leioderma decontaminated gx

description: .
DOI: 10.6084/m9.figshare.7216025
title: Iron ore tailings in the production of cement tiles: a value analysis on building sustainability

description: Abstract The present work discloses the development of a sustainable cement tile (SCT) produced with Iron Ore Tailings from tailings dams (IOT). Initially, technical evaluation and environmental analysis of IOT were performed through physical, chemical and morphological characterisation, leaching and dissolution tests. Its feasibility as a pigment was also investigated. Subsequently, the value analysis was performed, starting from an empathy map to a study on environmental, social and emotional values in the relationship between people and product. As result, the IOT presented fine, crystalline particles, no toxicity, and is technically feasible to be employed as filler, aggregate and pigment in the production of SCT. The colour layer of the SCT presented more homogeneous colour and less pores than conventional ones. Therefore, the design of the SCT was developed, incorporating intangible values such as: environmental ideology, local identity and social expression. In this sense, the present work seeks to assist in the decision-making process involving IOT as construction material.
DOI: 10.6084/m9.figshare.7216025.v1
title: Iron ore tailings in the production of cement tiles: a value analysis on building sustainability

description: Abstract The present work discloses the development of a sustainable cement tile (SCT) produced with Iron Ore Tailings from tailings dams (IOT). Initially, technical evaluation and environmental analysis of IOT were performed through physical, chemical and morphological characterisation, leaching and dissolution tests. Its feasibility as a pigment was also investigated. Subsequently, the value analysis was performed, starting from an empathy map to a study on environmental, social and emotional values in the relationship between people and product. As result, the IOT presented fine, crystalline particles, no toxicity, and is technically feasible to be employed as filler, aggregate and pigment in the production of SCT. The colour layer of the SCT presented more homogeneous colour and less pores than conventional ones. Therefore, the design of the SCT was developed, incorporating intangible values such as: environmental ideology, local identity and social expression. In this sense, the present work seeks to assist in the decision-making process involving IOT as construction material.
DOI: 10.6084/m9.figshare.7215770
title: Architectural form and land uses: an analysis of their effects on the occurrence of crimes

description: Abstract Although empirical studies strongly suggest that commercial activities are associated with higher crime rates, they do not consider whether there is any difference in the effects of isolated commercial activities, as opposed to those integrated to residential activities in the same building, and neither do they differentiate between non-residential activities in the immediate neighbourhood, in the district and city-wide. Thus, we investigated if non-residential activities in the conurbated area of Florianópolis (FCA) may be considered criminogenic even when they are integrated with residential activities in mixed buildings, and also whether different catchment areas could explain higher or lower crime rates. With that purpose, we randomly selected a sample of 100 street segments and compared their architectural and land use characteristics to crime rates. The results showed that isolated commercial use is associated with higher crime rates, whereas buildings with combined commercial and residential uses are not. The evidence also suggested that city-wide non-residential activities are criminogenic whereas those at the neighbourhood and district level do not show any association one way or another, and that higher densities, usually linked to verticalisation, were associated with lower crime rates.
DOI: 10.6084/m9.figshare.7215770.v1
title: Architectural form and land uses: an analysis of their effects on the occurrence of crimes

description: Abstract Although empirical studies strongly suggest that commercial activities are associated with higher crime rates, they do not consider whether there is any difference in the effects of isolated commercial activities, as opposed to those integrated to residential activities in the same building, and neither do they differentiate between non-residential activities in the immediate neighbourhood, in the district and city-wide. Thus, we investigated if non-residential activities in the conurbated area of Florianópolis (FCA) may be considered criminogenic even when they are integrated with residential activities in mixed buildings, and also whether different catchment areas could explain higher or lower crime rates. With that purpose, we randomly selected a sample of 100 street segments and compared their architectural and land use characteristics to crime rates. The results showed that isolated commercial use is associated with higher crime rates, whereas buildings with combined commercial and residential uses are not. The evidence also suggested that city-wide non-residential activities are criminogenic whereas those at the neighbourhood and district level do not show any association one way or another, and that higher densities, usually linked to verticalisation, were associated with lower crime rates.
DOI: 10.6084/m9.figshare.7215425
title: Laboratory study in 4.8 liters per flush (Lpf) toilets

description: Abstract This study's objective is to investigate, in the laboratory, the flush volume reducing possibilityby two litres (from 6.8 to 4.8 Lpf), that is, to verify whether that reduction negatively impacts the performance of the toilet and drainage system. Twenty 4.8 Lpf toilets with flush tank and single flush were evaluated (toilets designed to operate with 4.8 Lpf and toilets designed to operate with 6.8 Lpf, but regulated to 4.8 Lpf). The tests were done according the Brazilian standards NBR 15097, for the toilets, and NBR 15491, for the flush tanks, the ASME A112.19.2 (waste extraction test) and Plumbing Efficiency Research Coalition study (soybean paste transport test). The toilets with flush tanks passed the solids removal test from the toilet itself, but only five toilets (25%) were approved in all laboratory tests, which reflects the need to improve the design of the toilets. In the soybean paste transport test, the results varied from two to six flushes to clean the eighteen meters-long pipe. None of the 6.8 Lpf toilets, but regulated to 4.8 Lpf, was approved in the laboratory tests, which proves that the simple reduction of the flush tank water level is not a viable solution to reduce flush volume. The biggest problem is related to the performance of the building's drainage system. Reducing flush volume without a deeper investigation of the effects generated in the system can cause deposit of solids in the piping.
DOI: 10.6084/m9.figshare.7215425.v1
title: Laboratory study in 4.8 liters per flush (Lpf) toilets

description: Abstract This study's objective is to investigate, in the laboratory, the flush volume reducing possibilityby two litres (from 6.8 to 4.8 Lpf), that is, to verify whether that reduction negatively impacts the performance of the toilet and drainage system. Twenty 4.8 Lpf toilets with flush tank and single flush were evaluated (toilets designed to operate with 4.8 Lpf and toilets designed to operate with 6.8 Lpf, but regulated to 4.8 Lpf). The tests were done according the Brazilian standards NBR 15097, for the toilets, and NBR 15491, for the flush tanks, the ASME A112.19.2 (waste extraction test) and Plumbing Efficiency Research Coalition study (soybean paste transport test). The toilets with flush tanks passed the solids removal test from the toilet itself, but only five toilets (25%) were approved in all laboratory tests, which reflects the need to improve the design of the toilets. In the soybean paste transport test, the results varied from two to six flushes to clean the eighteen meters-long pipe. None of the 6.8 Lpf toilets, but regulated to 4.8 Lpf, was approved in the laboratory tests, which proves that the simple reduction of the flush tank water level is not a viable solution to reduce flush volume. The biggest problem is related to the performance of the building's drainage system. Reducing flush volume without a deeper investigation of the effects generated in the system can cause deposit of solids in the piping.
DOI: 10.6084/m9.figshare.7367669
title: Effect of accelerated aging on the properties of microconcrete reinforced with sisal fibers

description: Abstract In this study, two microconcrete samples, with and without metakaolin, were designed for the production of laminated composites reinforced with long sisal fibres. In addition to the reference microconcrete, another microconcrete was produced by replacing cement by metakaolin.The ideal metacaolin content that would guarantee a free calcium hydroxide matrix was determined by thermogravimetric analysis of blends with 20%, 30% and 40% substitution contents at the ages of 4 h, 10 h, 24 h, 7 days, 28 days and 730 days. Laminates produced with cement substitution by 30% metakaolin were submitted to flexural test after 28 days of curing in water, and after 12 and 25 wetting and drying cycles. The analysis of the microstructure was performed by scanning electron microscopy and dispersive energy X-ray spectroscopy (EDS). The results demonstrate that in the microconcrete containing only cement, the calcium hydroxide was leached from the matrix and deposited on the surface of the fibre. Thus, the aged composites showed a sudden rupture due to the weakening of the fibres. With the incorporation of metakaolin, the matrix showed to be free of calcium hydroxide, and the mechanical behaviour after cracking was not altered by aging. However, the temperature and humidity variation due the wet-drying cycle has induced cracking of the microconcrete, which detrimentally affected the strength at crack initiation of these composites and their rupture mode.
DOI: 10.6084/m9.figshare.7367669.v1
title: Effect of accelerated aging on the properties of microconcrete reinforced with sisal fibers

description: Abstract In this study, two microconcrete samples, with and without metakaolin, were designed for the production of laminated composites reinforced with long sisal fibres. In addition to the reference microconcrete, another microconcrete was produced by replacing cement by metakaolin.The ideal metacaolin content that would guarantee a free calcium hydroxide matrix was determined by thermogravimetric analysis of blends with 20%, 30% and 40% substitution contents at the ages of 4 h, 10 h, 24 h, 7 days, 28 days and 730 days. Laminates produced with cement substitution by 30% metakaolin were submitted to flexural test after 28 days of curing in water, and after 12 and 25 wetting and drying cycles. The analysis of the microstructure was performed by scanning electron microscopy and dispersive energy X-ray spectroscopy (EDS). The results demonstrate that in the microconcrete containing only cement, the calcium hydroxide was leached from the matrix and deposited on the surface of the fibre. Thus, the aged composites showed a sudden rupture due to the weakening of the fibres. With the incorporation of metakaolin, the matrix showed to be free of calcium hydroxide, and the mechanical behaviour after cracking was not altered by aging. However, the temperature and humidity variation due the wet-drying cycle has induced cracking of the microconcrete, which detrimentally affected the strength at crack initiation of these composites and their rupture mode.
DOI: 10.6084/m9.figshare.7368167
title: The use of the external diaphragm in the connection between an I beam section and tubular hollow section column

description: Abstract The external diaphragm in the connection between an I metal beam section and a hollow section tubular column is designed to increase efficiency in transfer of its efforts. This study aims at offering alternatives to the use of this structural system, reducing the limit imposed by its simple connection when this element is added, like a ring that surrounds the column and is connected to the beam flange. Studies investing the external diaphragm began in the 1970s in Japan, where theoretical and experimental analyses of its application were carried out. In Brazil, the first studies took place in 2005, but Brazilian steel structure standards have not yet addressed this issue. In this study numerical analyses were performed on connections with external diaphragm between I-beam section and hollow section tubular column for different widths and thicknesses of this stiffener. The analyses showed that there was considerable increase in the strength and stiffness of the connection.
DOI: 10.6084/m9.figshare.7368167.v1
title: The use of the external diaphragm in the connection between an I beam section and tubular hollow section column

description: Abstract The external diaphragm in the connection between an I metal beam section and a hollow section tubular column is designed to increase efficiency in transfer of its efforts. This study aims at offering alternatives to the use of this structural system, reducing the limit imposed by its simple connection when this element is added, like a ring that surrounds the column and is connected to the beam flange. Studies investing the external diaphragm began in the 1970s in Japan, where theoretical and experimental analyses of its application were carried out. In Brazil, the first studies took place in 2005, but Brazilian steel structure standards have not yet addressed this issue. In this study numerical analyses were performed on connections with external diaphragm between I-beam section and hollow section tubular column for different widths and thicknesses of this stiffener. The analyses showed that there was considerable increase in the strength and stiffness of the connection.
DOI: 10.6084/m9.figshare.7367990
title: Effect of the incorporation of TiO2 waste (UOW) in the formation of the mineralogical phases of Portland clinker

description: Abstract The reuse of industrial waste in the construction industry has proven to be an environmentally and economically attractive alternative, especially for the cement industry, which has long sought after procedures that effectively reduce the high use of energy and CO2 emissions generated during clinker production. In this sense, it is necessary to use alternative materials as partial substitutes for raw materials in clinker production. Thus, the objective of this research study is to produce Portland clinker with low carbon dioxide emissions from the incorporation of unreacted ore (UOW), a waste generated during the production of titanium dioxide (TiO2). The carbon dioxide emissions generated during the production of this material were verified by thermal analysis (TG/DTG), and the influence of the waste on the formation of clinker phases was verified by mineralogical analysis (XRD), optical microscopy (MO) and scanning electron microscopy (SEM). The results obtained led to the determination of the ideal incorporation content of TiO2 for clinker production, and they also showed that the UOW - up to a limit content of incorporation - acts like a mineraliser and is, therefore, beneficial for the formation of alite.
DOI: 10.6084/m9.figshare.7367990.v1
title: Effect of the incorporation of TiO2 waste (UOW) in the formation of the mineralogical phases of Portland clinker

description: Abstract The reuse of industrial waste in the construction industry has proven to be an environmentally and economically attractive alternative, especially for the cement industry, which has long sought after procedures that effectively reduce the high use of energy and CO2 emissions generated during clinker production. In this sense, it is necessary to use alternative materials as partial substitutes for raw materials in clinker production. Thus, the objective of this research study is to produce Portland clinker with low carbon dioxide emissions from the incorporation of unreacted ore (UOW), a waste generated during the production of titanium dioxide (TiO2). The carbon dioxide emissions generated during the production of this material were verified by thermal analysis (TG/DTG), and the influence of the waste on the formation of clinker phases was verified by mineralogical analysis (XRD), optical microscopy (MO) and scanning electron microscopy (SEM). The results obtained led to the determination of the ideal incorporation content of TiO2 for clinker production, and they also showed that the UOW - up to a limit content of incorporation - acts like a mineraliser and is, therefore, beneficial for the formation of alite.