cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.14287071
title: Eco-efficient self-compacting concrete with low cement consumption

description: Abstract Self-compacting concretes must simultaneously present fluidity and cohesion without the presence of exudation and segregation. These necessary characteristics of concrete in the fresh state are usually possible only through high contents of fines and, consequently, higher consumption of cement for its production. The consolidation of this material has instigated the search for solutions to reduce cement consumption and CO2 emissions. Aiming to contribute to environmental sustainability and the cement industry, this research study investigated the technical and economic feasibility of self-compacting concrete with low cement consumption. The densities of the concretes were determined, as well as their resistance to compression and diametral compression traction. The study analysed three concretes with reduced cement consumption and one reference concrete. The water/cement, fibre limestone/cement and active silica/cement ratios were maintained constant, while cement consumption ranged from 434.00 kg/m3 to 325.50 kg/m3, thus achieving a reduction of up to 25% in cement consumption. The results showed that it is feasible to produce self-compacting concrete with low cement consumption, guaranteeing the quality of its mechanical properties, with approximately cost reductions and CO2 emission of 6% and 19% respectively in relation to the reference concrete.
DOI: 10.6084/m9.figshare.14287070
title: Influence of crushing methods on the properties of recycled concrete aggregate

description: Abstract The main challenge regarding the use of recycled concrete aggregates (RCA) in high-performance building materials refers to the remaining cement paste from previous constructions that remains attached to natural aggregates surface. The properties of RCA can be improved through the selection of comminution equipment capable of promoting release in this interface zone. However, crushing methods are rarely discussed in the scientific literature. This paper aims to contribute to change this scenario, comparing the properties of RCA crushed by jaw and impact crushers, both adjusted in order to generate a product with the same granulometry. The result obtained was a similar product in terms of particle shape, and chemical and mineralogical composition, leading to the conclusion that the liberation of the residual cement paste on both crushing methods was analogous. This similarity between properties challenges the common belief that the impact crusher generates a product with lower grade of adhered cement paste and excessive fines.
DOI: 10.6084/m9.figshare.14287069
title: Constructed wetlands for treating domestic wastewater: a comparative analysis of life cycle costs

description: Abstract Due to the lack of basic sanitation in Brazil, many households use decentralised treatment of their wastewater. Therefore it is important to analyse the costs of wastewater treatment alternatives. A life cycle cost assessment was performed to evaluate the cost of constructed wetlands for wastewater treatment, comparing three scenarios with the most commonly used configurations. Scenario 1 consisted of a real scale wastewater treatment plant composed of a septic tank and a vertical flow constructed wetland with effluent recirculation to a septic tank, located in south of Brazil. The other two scenarios were created: scenario 2 was formed by a vertical flow constructed wetland and scenario 3 consisted of a septic tank, a vertical flow constructed wetland and a horizontal flow constructed wetland. The results showed that the net present value of the life cycle cost were decreasing for scenarios 1, 2 and 3. Scenario 3 presented lower life cycle cost. Scenario 1 had the poorest performance in the analysis, however, due to the recirculation of the wastewater this was the best performance in environmental terms. Due to the fact that life cycle cost analysis takes into account the cost throughout the life cycle of each scenario, it proved to be an important and suitable tool to help choosing the lowest cost treatment type.
DOI: 10.6084/m9.figshare.14287066
title: Usage of glulam waste for particleboard production

description: Abstract Glulam are long engineered wood beams (or columns) composed by graded lumbers bounded together with the use of appropriate adhesives under pre-established pressure. The greater the industrialization the greater will be the production of wood waste a matter that deserves attention and development of technologies in terms of its waste management. This paper aimed to investigate the technical feasibility of Brazilian industrial glulam waste usage as raw material for particleboard production industries using a castor oil-based polyurethane adhesive. Particleboards were manufactured using glulam (produced with Eucalyptus urograndis) waste particles and castor oil-based polyurethane adhesive at 8, 10, 12 and 14% mass proportions and characterized based on NBR 14810-2:2006 procedures. Analysis of variance was performed for the comparison of mechanical and physical performances of the panels. The increase of adhesive content caused and increase of the MOR (Rupture Modulus), but the MOE (Elasticity Modulus) and the physical properties remained unaltered above 12% of adhesive content. The adhesive content greater than 8% provided panel performances that met the standardized specifications. Based on these findings, it was possible to conclude that the waste of glulam produced with Eucalyptus urograndis can be used as raw material for particleboard production.
DOI: 10.6084/m9.figshare.14287064
title: Relationship between stiffness properties for different mechanical demands in timber structures design projects

description: Abstract In Brazil, the Brazilian Standard NBR 7190 (ABNT, 1997) establishes testing methods to obtaining the physical and mechanical properties wood. With the impossibility of determining the experimental results, the Brazilian Code establishes relations among the properties. However, the relations between the stiffness properties are based on the older normative standard MB-26: 1940 (Brazilian Standard NBR 6230), which condisidered another calculation model rather than the one used by the Brazilian standard. This research aimed to investigate the equivalence between the conventional modulus of elasticity in static bending tests (EM), with compression parallel to the fibres (Ec0) and tension parallel to the fibres (Et0) of ten species of tropical wood, as well as to establish relations between these properties, in case they are not equivalent. The ANOVA results showed that Ec0 and Et0 were statistically equivalent, and the relation between EM and 0.90∙Ec0 was not statistically equivalent, implying the determination of an ideal coefficient equal to 0.98 by the least squares method. This coefficient was 8.89% higher than the Brazilian standard.
DOI: 10.6084/m9.figshare.14287060
title: Influence of polypropylene microfibre (PPMF) dispersion procedure on fresh and hardened rendering mortar properties

description: Abstract This study was carried out to evaluate the influence of a polypropylene microfibre (PPMF) dispersion procedure on fresh and hardened state properties of rendering mortars. Specimens prepared with two different PPMF dispersion procedures were evaluated comparatively with reference specimens prepared without adding PPMF. Changes in the fresh properties were monitored using flow table, squeeze flow, and air-entrainment tests. The hardened state was characterized by capillary water absorption, air-permeability, dynamic elastic modulus (E), tensile strength according to the Brazilian test, and porosity by the Archimedes immersion method. Results show that the fresh mortar properties were not affected by dispersion procedure and all hardened mortar properties were statistically similar, except for the dimensional variation of the specimens. The study also shows that adding polypropylene microfibres in a dispersed form was more effective in terms of controlling total drying shrinkage than directly adding fibres to the cementitious matrix (as recommended by the manufacturer) or the reference mortar.
DOI: 10.6084/m9.figshare.14287050
title: Masonry buildings in the metropolitan region of Recife

description: Abstract The paper discusses masonry buildings constructed in the state of Pernambuco, Brazil. Topics such as the main features of this construction technique and the peculiarities that affect its structural behaviour are discussed. Technical information about accidents occurred in recent years are also discussed, along with the historical records of the events, followed by indications of the causes for the collapse. Additionally, this paper presents an extensive characterisation of materials and components used in non-structural masonry constructions in the region, making it one of the most comprehensive research studies on this topic in Brazil. This study conducts an in-depth, numerical and experimental analysis of the behaviour of the compressive strength of blocks, prisms and mini-walls that are part of a non-load bearing system, which is often used in the region to carry loads above its own weight. The results obtained allowed to identify the contribution of several mortar rendering layers to the load capacity of the tested specimens. The factors that influenced the load capacity of the tested specimens are also discussed. Finally, a summary of the main results of all the tests performed is presented in order to provide a detailed explanation for the failures modes observed, which were always sudden and brittle, as was the case in most accidents that occurred with this type of building in the region.
DOI: 10.5066/p95opz0d
title: Pedestrian tsunami evacuation results for three California probabilistic tsunami hazard zones and four travel speeds (shapefiles) and impaired walk travel times for all zones by parcel land-use and flow depth class (tables)

description: These datasets supports the conclusions in the journal article entitled &amp;amp;quot;Variations in community evacuation potential related to average return periods in probabilistic tsunami hazard analysis&amp;amp;quot; as described in the abstract below: Tsunami risk management requires strategies that can address multiple sources with different recurrence intervals, wave-arrival times, and inundation extents. Probabilistic tsunami hazard analysis (PTHA) provides a structured way to integrate multiple sources, including the uncertainties due to the natural variability and limited knowledge of sources. PTHA-based products relate to specific average return periods (ARP) and while there has been considerable attention paid to ARP choice for building codes, guidance on ARP choice to support evacuation planning and related land-use is lacking. We use the State of California (USA) coastal communities as a case study to explore the use of geospatial analysis and pedestrian-evacuation modeling for comparing the societal implications of tsunamis based on evacuation areas that reflect 475-year, 975-year, and 2,475-year ARPs. Results demonstrate that changes in PTHA ARP had a substantial effect on the number of taxlot parcels in tsunami evacuation areas, but not on the primary land-use of these parcels or which communities had the highest number of exposed parcels. Composite PTHA maps provided high-level insights on hazard exposure and identified dominant sources; however, disaggregated PTHA outputs that reflect single source parameters (e.g., wave-arrival time) were necessary to quantify evacuation potential from local and distant tsunamis. Framing changes in ARP assumption based on changes in the number, land-use type, and potential evacuation challenges of parcels in evacuation areas can provide valuable insight on the real-world implications of which ARP to use in land-use or evacuation planning. These data support the following publication: Wood, N., Peters, J., Wilson, R., Sherba, J., and Henry, K., 2020. Variations in community evacuation potential related to average return periods in probabilistic tsunami hazard analysis. International Journal of Disaster Risk Reduction.
DOI: 10.6084/m9.figshare.14287049
title: Desirable environmental attributes for a Kangaroo Mother Care unit based on a participatory project experience

description: Abstract This paper indicates desirable environmental attributes for Kangaroo Mother Care units from the point of view of their users. The results derive from a participatory project experience carried out in a Kangaroo Mother Care unit in the state of Santa Catarina, Brazil. The research methods used were a literature review, exploratory visits to two units in operation, brainstorming, wish poems and visual selection. The aim of this study is to offer guidelines to help future units so that they are more responsive to the wishes of their users.
DOI: 10.6084/m9.figshare.14287046
title: Shear bond strength device for mortar coatings: development and validation

description: Abstract The high incidence of building pathologies resulting from the lack of adherence of mortar coatings evidences the importance of conducting studies focusing on this problem. The main properties that influence adherence are tensile bond strength, shear bond strength and adherence extension or real interfacial contact area. However, most studies in this area focus only on tensile bond strength. In order to understand the properties that influence bond strength, it is essential to carry out interfacial mortar/substrate studies. Hence, this paper presentes an investigation of shear bond strength, the main property influencing the coating bond on mortars. A device to test shear bond strength was developed and tested. This tool can be fitted to a pull-off device that is commonly used and meets the Brazilian standards for tensile strength tests. In order to validate the proposed device, three different mortars with air-entraining admixture applied on concrete substrates were tested. The results showed that the device is effective and also easy to use and reproduce. The shear bond strength results were coherent and presented low variation coeficiente values, showing great potential for use in the comparative analysis of mortars.
DOI: 10.6084/m9.figshare.14287045
title: Teaching of BIM in undergraduate program in civil engineering of an american university: case study

description: Abstract With the increasing advance of technology the construction of buildings become more complex. In order to follow this process, it was developed the paradigm named Building Information Modeling (BIM). It is based on collaboration between the architectural, engineering and construction professionals for the development of an integrated 3D model of a building from which necessary information will be set aside for the project management. BIM has been used by many companies, due to potential benefits. However, the diffusion of this paradigm remains limited by the small number of professionals who dominate it. Thus, this study aims to demonstrate the importance of BIM and describe a method of teaching it, so this paradigm could be widespread and used by many students. For this purpose, it was made an analysis of BIM teaching-learning experience in the class of Construction project management I, taught at Arizona State University (ASU), located in United States. From the results it was found that this class introduce concepts of BIM with others project management subjects, it may be classified as intermediate level, forming a BIM analyst, and it is effective in present some of mainly concepts and uses of BIM to the class.
DOI: 10.6084/m9.figshare.14287042
title: Influence of moisture content on the determination of the modulus of elasticity of Pinus sp. beams

description: Abstract In the wood drying process, the static modulus of elasticity does not change until the fibre saturation point (FSP) is reached; however, for lower than FSP moisture content, the static modulus of elasticity changes. The aim of this paper is to investigate the influence of moisture content on obtaining the modulus of elasticity of sawn wooden beams of Pinus sp. through free transverse vibration and static bending tests. We used 20 beams with nominal dimensions of 5 cm x 10 cm x 200 cm from reforestation forests in the State of São Paulo. The beams were taken from newly harvested logs that were kept indoors for drying under controlled temperature and humidity. The apparent longitudinal modulus of elasticity, obtained through the free transverse vibration method, stabilized with humidity in the FSP variation range, as it occurs in the static bending test. The study showed that the free transverse vibration test can be used to obtain the apparent longitudinal modulus of elasticity from pieces of wood with a moisture content that is either above or below the FSP.
DOI: 10.25345/c5xn6q
title: MassIVE MSV000087089 - Varca et al Cell Chemical Biology
title: Multidimensional nanoflow LC-MS/MS analyses performed in the work of Varca et al to evaluate DUB inhibitor selectivity.
DOI: 10.6084/m9.figshare.14287039
title: The identification and analysis of making-do waste: insights from two Brazilian construction sites

description: Abstract Making-do has been pointed out as an important category of waste in the construction industry. It refers to a situation in which a task starts or continues without having available all the inputs required for its completion, such as materials, machinery, tools, personnel, external conditions, and information. By contrast, the literature points out that improvisation is a ubiquitous human practice even in highly structured business organizations, and plays an important role when rules and methods fail. The aim of this paper is to provide some insights on the nature of making-do as a type of waste, based on two exploratory case studies carried out on construction sites. The main contributions of this research work are concerned with the identification of different categories of making-do and its main causes. This paper also discusses some strategies for reducing making-do on construction sites.
DOI: 10.6084/m9.figshare.14287038
title: Systematization of user requirements using QDF's House of Quality at the conceptual stages of low-income housing projects for the Programa Minha Casa, Minha Vida

description: Abstract This paper proposes the structuring and organization of users' requirements as inputs at the early stages of the design process of low-income housing projects, within the "Minha Casa, Minha Vida" Program. This objective of this proposition is to develop a product with more a more value-added product. The research strategy adopted was the case study. After a literature review aimed at understanding the mechanisms used to systematize requirements, a case study was conducted in a low-income housing project developed for families earning up to three minimum wages. That exploratory study sought to capture users' requirements based on a users' satisfaction assessment applied in the project. Based on the results achieved, a case study was undertaken, in which the researcher collaborated with the design team, focusing on the organization and provision of information for the consideration of users' requirements, since a target cost had been given to the design team. Finally, this paper presents a structure and organization of users' requirements, as well the respective procedures, based on the use of QFD, for the development of low-income housing units under the "Minha Casa, Minha Vida" Program.
DOI: 10.6084/m9.figshare.14287034
title: The use of EVA in mortar floor coverings for impact noise insulation in residential buildings

description: Abstract Ethylene vinyl acetate (EVA) is widely used in the footwear industry. However, this manufacturing process generates significant waste. With the implementation of the Brazilian performance standard NBR 15575, all new residential buildings must meet the required performance levels. One of the requirements prescribed by the standard is impact noise insulation between floors, which can be achieved by using materials with low specific mass. Hence, this research study aims to develop a floor covering mortar incorporating EVA derived the footwear industry, to be used as floor covering for soundproofing. The study was conducted by undertaking compressive and tensile strength tests, as well as normalised impact sound pressure level, executed in a normalised chamber. Five mixtures were produced, with 20%, 40%, 60% 80% and 100% EVA substituting regular sand, as well as the conventional floor covering. Floor covering plates measuring 1m2, and one representative sample of the slab measuring 16m2 were molded, which acoustic isolation differed by 2dB. The mixture with the best performance provided a 9dB reduction in relation to the reference slab with conventional floor covering, proving to be effective for use as an acoustic insulator.
DOI: 10.6084/m9.figshare.14287033
title: Soil-structure interaction in steel truss sheds roofed by circular arches

description: Abstract Structural engineers usually consider that the foundation supporting soil behaves as a non-deformable solid that remains unchanged after loading. However, practice in foundation design indicates that the soil will deform when subjected to loading and this causes disturbances in the structure. In this study, the so-called soil-structure interaction was analysed in a steel truss shed roofed by a circular arch. Stress and strain changes in the structure joints and corresponding displacements were investigated. Normal stresses in the footing-soil interface and generated displacements were also studied. The procedure compared the solution with the hypothesis of fixed supports using footings of various sizes by computing the effects of the soil-structure interaction. In order to obtain the results, a numerical modeling based on the finite element method was carried out using the SAP2000(r) software. The results confirmed the initial hypothesis that even small footings supporting large eccentricities from loads and moments exhibited only compressive stresses in the footing-soil interface.
DOI: 10.6084/m9.figshare.14287031
title: Caracterization of the acoustic quality of classrooms for musical practice and teaching

description: Abstract Musicians need to properly perceive sound in the rooms destined to music study and practice. That is possible when those rooms are acoustically prepared and thus enable the development and improvement of musical sound perception. In this study, three study rooms and three collective music classrooms at a university were characterised acoustically through the opinions of their musician-users and measurements of their impulsive responses, as well as by the subsequent calculation of the rooms' acoustic parameters. Rooms described by musicians as dry presented average reverberation times of 0.3 seconds in the 500-1000 Hz octave bands, clarity between 14 and 22 dB and definition between 88% and 96 %. The rooms described as reverberant ones are characterised by reverberation times around 1.5 seconds, clarity of 1 dB and definition of 40%. The musicians' opinions allowed us to understand their preferences for the acoustic quality of the rooms, and to conclude that the information provided by them was quite consistent with the data measurements.