cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.14321703.v1
title: Durability of concrete produced with coarse aggregate from red ceramic waste

description: ABSTRACT The use of ceramic waste in concrete can be evaluated as a viable action in favor of sustainability in the construction industry. However, it is necessary, the study of the physical and mechanical properties of the concrete made with residue, guaranteeing the safety and the recovery of the useful life of the buildings. In this sense, this work evaluated the production of concrete materials with aggregates derived from concrete residues in the armed plane. In order to achieve this, a gradual change of the natural high yield was introduced by the red ceramic process at 40 and 100% substitution by volume. Carbonation, absorption by capillary permeation, air permeability and penetration of chlorides were obtained for the verification of durability, as well as a record of their mechanical properties, especially axial compression strength. The results showed lower permeability for the concretes with the ceramic and, consequently, lower chloride attack and carbonation for mixtures with up to 40% ceramic waste, which suggests, therefore, that the elements executed with these alternative blends are less prone to corrosion of the reinforcements. The analysis by scanning electron microscopy evidenced a reduction in the diameter of the capillary pores, as a result of the better hydration of the cement phase through the phenomenon known as internal cure, provided by the use of the ceramic aggregate, also reducing the thickness of the interfacial transition zone between the aggregate and the cement matrix.
DOI: 10.6084/m9.figshare.14321703
title: Durability of concrete produced with coarse aggregate from red ceramic waste

description: ABSTRACT The use of ceramic waste in concrete can be evaluated as a viable action in favor of sustainability in the construction industry. However, it is necessary, the study of the physical and mechanical properties of the concrete made with residue, guaranteeing the safety and the recovery of the useful life of the buildings. In this sense, this work evaluated the production of concrete materials with aggregates derived from concrete residues in the armed plane. In order to achieve this, a gradual change of the natural high yield was introduced by the red ceramic process at 40 and 100% substitution by volume. Carbonation, absorption by capillary permeation, air permeability and penetration of chlorides were obtained for the verification of durability, as well as a record of their mechanical properties, especially axial compression strength. The results showed lower permeability for the concretes with the ceramic and, consequently, lower chloride attack and carbonation for mixtures with up to 40% ceramic waste, which suggests, therefore, that the elements executed with these alternative blends are less prone to corrosion of the reinforcements. The analysis by scanning electron microscopy evidenced a reduction in the diameter of the capillary pores, as a result of the better hydration of the cement phase through the phenomenon known as internal cure, provided by the use of the ceramic aggregate, also reducing the thickness of the interfacial transition zone between the aggregate and the cement matrix.
DOI: 10.6084/m9.figshare.14321704
title: Influence of electrospinning parameters on morphology and size of silk fibroin fibers

description: ABSTRACT The processing of silk fibroin (SF) by means of the electrospinning technique has opened a wide field of possibilities to generate fibrillar membranes at micro and nanometric scale, which together with the biocompatibility properties and outstanding mechanical properties of this protein, enhance its use in various engineering and biomedical applications. The electrospinning processes are subject to a large number of variables and the interactions between them, which in turn affects the morphological properties of the material obtained. In the present work we used SF from Colombian sericulture residues, dissolved in formic acid at 10% w/w, two electric field conditions were studied (R=1 and 2 kV/cm) at three distances (8, 10 and 12 cm) and under two flow conditions (0.05 and 0.1 mL/h). The fibrous membranes obtained were characterized by scanning electron microscopy (SEM); the images were analyzed with the ImajeJ software to establish the presence of beads defects, their diameters, and distributions. We found that the minor electric field R=1 decreased the appearance of defects. An analysis of variance (ANOVA) was performed under this condition and the comparison of means was made using the Tukey test (P &lt;0.05) for the variables that showed significant differences, using the statistical software R. The results indicate that the parameters with significant effect were the flow and the distance. Therefore, it was established that, among the variables studied, the results obtained with R=1 kV/cm, distance of 12 cm and flow of 0.1 mL/h, promoted the obtaining of fibrillar membranes with uniform nanometric diameters and without beads defects.
DOI: 10.34703/gzx1-9v95/kavzfp/z6d51q
title: Indiana_ABC_case_study_t2.pdf

description: Case Study: Indiana ABC
DOI: 10.34703/gzx1-9v95/kavzfp/0qoxlz
title: ABC_bidding_case_studies_and_consensus_building.pdf

description: Final Report
DOI: 10.34703/gzx1-9v95/kavzfp/zunrnn
title: ABC-UTC-GUIDE_Bidding.pdf

description: Guide
DOI: 10.34703/gzx1-9v95/kavzfp/zrv4kb
title: Larpenteur_Minnesota_ABC_case_study_t2.pdf

description: Case study: Larpenteur Avenue
DOI: 10.34703/gzx1-9v95/kavzfp
title: Bidding of Accelerated Bridge Construction Projects: Case Studies and Consensus Building [ABC-UTC-2016-C1-ISU02]

description: Accelerated bridge construction (ABC) is a solution for upgrading substandard bridges that reduces construction and closure times and minimizes exposure of the traveling public and road workers to construction activities. To take full advantage of the benefits of ABC, agencies should decide which projects are appropriate for ABC and how to bid these projects given the unique attributes of ABC methods. The research team compiled information on decision matrices for identifying ABC projects and outlined bidding processes for projects that utilized ABC. Four ABC projects in three states (Georgia, Indiana, and Minnesota) were then investigated in detail. Note that this project coincides with a partner project that contained similar information collection efforts for project delivery methods (Delivery Methods for Accelerated Bridge Construction Projects: Case Studies and Consensus Building [ABC-UTC2016-C1-ISU01]). The research team reached out to personnel involved in the projects to discuss bid items, contracting methods, and lessons learned. The results of this effort are included in this report and also in four standalone case study summaries. The case studies suggest that, when bids allow for flexibility, innovation is often incorporated into the project, which results in financial savings for the agency and/or time savings for the traveling public. After a project is completed, the agency can benefit from reviewing the lessons learned and successful aspects of the project and applying these to future projects. Final Presentation: https://youtu.be/e1xfrxvH8d0
DOI: 10.6084/m9.figshare.14321709
title: Influence of the cooling temperature on the mass variation and mechanical resistance of injected ABS

description: ABSTRACT Injected ABS parts submitted to different cooling temperatures can present variations on their mass and different levels of mechanical resistance. The purpose of this work is to study the influence of the cooling temperature on the mass variation and mechanical resistance of injected ABS parts. Thereby, initially, specimen with gear shape have been produced under different cooling conditions. Then, the mass variation of the specimen has been analysed with the help of an analytical balance. To verify the mechanical resistance of the studied material, was designed and constructed a mechanical device, which made possible the application of an active loading on two specimens. By obtained results, it was possible observe that with the decrease of the cooling temperature, there was an increase on the mass and mechanical resistance of the injected ABS parts.
DOI: 10.6084/m9.figshare.14321709.v1
title: Influence of the cooling temperature on the mass variation and mechanical resistance of injected ABS

description: ABSTRACT Injected ABS parts submitted to different cooling temperatures can present variations on their mass and different levels of mechanical resistance. The purpose of this work is to study the influence of the cooling temperature on the mass variation and mechanical resistance of injected ABS parts. Thereby, initially, specimen with gear shape have been produced under different cooling conditions. Then, the mass variation of the specimen has been analysed with the help of an analytical balance. To verify the mechanical resistance of the studied material, was designed and constructed a mechanical device, which made possible the application of an active loading on two specimens. By obtained results, it was possible observe that with the decrease of the cooling temperature, there was an increase on the mass and mechanical resistance of the injected ABS parts.
DOI: 10.6084/m9.figshare.14321707
title: Valorization of wood shavings waste for the production of wood particulate composites

description: ABSTRACT The aim of this work was to evaluate the physical and mechanical properties of particleboards using particles from wood shaving at three urea-formaldehyde adhesive contents: 6, 9 and 12% (dry mass basis). The particleboards were produced with nominal density of 0.70 g.cm-3, pressing cycle with temperature of 160 °C, pressure of 3.92 MPa and time of 8 minutes. The properties of water absorption (WA), thickness swelling (TS), both after 2 and 24 hours, apparent density, compression ratio, perpendicular traction, modulus of elasticity (MOE) and modulus of rupture (MOR) in static bending, Janka hardness and screw withdrawal resistance were evaluated. The results of the tests indicated that with the increase of the adhesive content from 6 to 12%, there was no significant statistical difference for the average values of apparent density and compression ratio, being 0.621 g.cm-3 and 1.234, respectively, and the WA and the TS are decreased after 2 and 24 hours. There was a gain of 93% for the MOR property and 64% for the MOE property with the increase of the adhesive content. For perpendicular traction, the highest mean value was 0.67 MPa, referring to the panels with 12% of adhesive. For Janka hardness, the treatments with contents of 9 and 12% of adhesive presented the highest average values being of 21.60 and 25.26 MPa, respectively. In general, the use of wood shavings is feasible for the production of particleboards with a 12% adhesive content.
DOI: 10.6084/m9.figshare.14321707.v1
title: Valorization of wood shavings waste for the production of wood particulate composites

description: ABSTRACT The aim of this work was to evaluate the physical and mechanical properties of particleboards using particles from wood shaving at three urea-formaldehyde adhesive contents: 6, 9 and 12% (dry mass basis). The particleboards were produced with nominal density of 0.70 g.cm-3, pressing cycle with temperature of 160 °C, pressure of 3.92 MPa and time of 8 minutes. The properties of water absorption (WA), thickness swelling (TS), both after 2 and 24 hours, apparent density, compression ratio, perpendicular traction, modulus of elasticity (MOE) and modulus of rupture (MOR) in static bending, Janka hardness and screw withdrawal resistance were evaluated. The results of the tests indicated that with the increase of the adhesive content from 6 to 12%, there was no significant statistical difference for the average values of apparent density and compression ratio, being 0.621 g.cm-3 and 1.234, respectively, and the WA and the TS are decreased after 2 and 24 hours. There was a gain of 93% for the MOR property and 64% for the MOE property with the increase of the adhesive content. For perpendicular traction, the highest mean value was 0.67 MPa, referring to the panels with 12% of adhesive. For Janka hardness, the treatments with contents of 9 and 12% of adhesive presented the highest average values being of 21.60 and 25.26 MPa, respectively. In general, the use of wood shavings is feasible for the production of particleboards with a 12% adhesive content.
DOI: 10.6084/m9.figshare.14071301
title: An updated global dataset of phosphorus addition experiments in natural terrestrial ecosystems

description: The dataset is an extension of our previously published dataset in the forests, grasslands, and tundra (Hou et al. 2019, 2020). Our previous dataset included only the latest measurement of plant response to the highest level of P-addition in each experiment to avoid pseudoreplication in studying the global distribution and magnitude of P limitation (Hou et al. 2020). In this dataset, we included time series of plant response to all levels of P-addition in each experiment to explore how experimental duration and P-addition quantity would affect P-addition effect both at individual sites and across sites. We used the study site as a clustering variable in our statistical analyses to account for the dependence among multiple observations of plant response to P additions at a site. Observations of community-level leaf P and N concentrations and N:P mass ratio were collected and added to this dataset to explore the consistency between them and P-addition experiments in indicating latitudinal gradient in P limitation. <br><br><br>References<br>Hou, E., Luo, Y., Kuang, Y., Chen, C., Lu, X., Jiang, L. et al. (2019). A global dataset of phosphorus addition experiments in terrestrial ecosystems. Retrieved from: https://doi.org/10.6084/m9.figshare.8969963<br>Hou, E., Luo, Y., Kuang, Y., Chen, C., Lu, X., Jiang, L. et al. (2020). Global meta-analysis shows pervasive phosphorus limitation of aboveground plant production in natural terrestrial ecosystems. Nature Communications, 11, 637.<br>
DOI: 10.6084/m9.figshare.14321710
title: Extraction of acetaldehyde from mineral water using 2,4- dinitrophenylhydrazine as derivatizing agent

description: ABSTRACT Acetaldehyde generated, when PET bottles of water are deposited at high temperature for long period of time. The acetaldehyde produced, transferred into the mineral water and alter the organoleptic properties of water. Acetaldehyde is also a possible carcinogen and mutagen. In the present research work, acetaldehyde in mineral water was derivatized with 2, 4-dinitrophenyl hydrazine (DNPH), extracted by solid phase extraction (SPE) using octadecyl silane oxide (C18) and finally investigated by gas chromatography (GC). Acetaldehyde-2, 4-dinitropheyl hydrazone (A-DNPH) formed after derivatization which were adsorbed on the surface of C18. Solvent acetonitrile was used for the elution of A-DNPH from the solid phase extraction (SPE) column. Effect of storage time and light on the migration of acetaldehyde was investigated and found the mineral water stored for longer period of time in sun light change their organoleptic properties due to migration of acetaldehyde into water.
DOI: 10.6084/m9.figshare.14321710.v1
title: Extraction of acetaldehyde from mineral water using 2,4- dinitrophenylhydrazine as derivatizing agent

description: ABSTRACT Acetaldehyde generated, when PET bottles of water are deposited at high temperature for long period of time. The acetaldehyde produced, transferred into the mineral water and alter the organoleptic properties of water. Acetaldehyde is also a possible carcinogen and mutagen. In the present research work, acetaldehyde in mineral water was derivatized with 2, 4-dinitrophenyl hydrazine (DNPH), extracted by solid phase extraction (SPE) using octadecyl silane oxide (C18) and finally investigated by gas chromatography (GC). Acetaldehyde-2, 4-dinitropheyl hydrazone (A-DNPH) formed after derivatization which were adsorbed on the surface of C18. Solvent acetonitrile was used for the elution of A-DNPH from the solid phase extraction (SPE) column. Effect of storage time and light on the migration of acetaldehyde was investigated and found the mineral water stored for longer period of time in sun light change their organoleptic properties due to migration of acetaldehyde into water.
DOI: 10.6084/m9.figshare.14321712
title: Thermal properties of acrylonitrile-butadienestyrene (ABS) composites reinforced with silica nanoparticles (SiO2) modified cellulose

description: ABSTRACT The aim of this study was to evaluate thermal properties of composites made with terpolymer acrylonitrile-butadiene-styrene (ABS) reinforced with silica nanoparticles (SiO2) modified cellulose. Primarily, the fibers were modified using the sol-gel process and the tetraethyl ortosilicate (TEOS) as precursor. In addition, two concentrations of TEOS and two reaction times were used to produce two types of modified fibers, FT1 and FT2 fibers, then was determined the yield of modification process. The fibers were characterized by scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and its derivative (DTG). The acrylonitrile-butadiene-styrene composites reinforced with 10 and 20% (w/w) unmodified cellulose pulp fibers (FNT) and silica nanoparticles modified (FT1 and FT2) were obtained by extrusion process and subsequent injection. The composites were characterized in terms of density, thermogravimetric (TGA / DTG), thermal deflection temperature (HDT) and VICAT softening temperature. In general, the addition of fibers provided an increase for HDT and VICAT, being more pronounced when the fiber content increased from 10% to 20%. However, in comparison with ABS the increasing of fiber content from 10% to 20%, caused a decrease in Tonset and caused an increase in density.
DOI: 10.6084/m9.figshare.14321712.v1
title: Thermal properties of acrylonitrile-butadienestyrene (ABS) composites reinforced with silica nanoparticles (SiO2) modified cellulose

description: ABSTRACT The aim of this study was to evaluate thermal properties of composites made with terpolymer acrylonitrile-butadiene-styrene (ABS) reinforced with silica nanoparticles (SiO2) modified cellulose. Primarily, the fibers were modified using the sol-gel process and the tetraethyl ortosilicate (TEOS) as precursor. In addition, two concentrations of TEOS and two reaction times were used to produce two types of modified fibers, FT1 and FT2 fibers, then was determined the yield of modification process. The fibers were characterized by scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and its derivative (DTG). The acrylonitrile-butadiene-styrene composites reinforced with 10 and 20% (w/w) unmodified cellulose pulp fibers (FNT) and silica nanoparticles modified (FT1 and FT2) were obtained by extrusion process and subsequent injection. The composites were characterized in terms of density, thermogravimetric (TGA / DTG), thermal deflection temperature (HDT) and VICAT softening temperature. In general, the addition of fibers provided an increase for HDT and VICAT, being more pronounced when the fiber content increased from 10% to 20%. However, in comparison with ABS the increasing of fiber content from 10% to 20%, caused a decrease in Tonset and caused an increase in density.
DOI: 10.34703/gzx1-9v95/puufjz/eptud9
title: ABC-UTC_Guide_Accelerated-Repair-and-Replacement-of-Expansion-Joints.pdf

description: Guide
DOI: 10.34703/gzx1-9v95/puufjz/gqhxcv
title: Accelerated-Repair-and-Replacement-of-Expansion-Joints.pdf

description: Final
DOI: 10.34703/gzx1-9v95/puufjz
title: Accelerated Repair and Replacement Of Expansion Joints [ABC-UTC-2016-C1-ISU03]

description: Bridge deck expansion joints allow for the movement of bridge decks exposed to thermal expansion and dynamic loading. These joints are often one of the first components of a bridge deck to fail, and there is a need for accelerated replacement options, especially in areas with high traffic volumes. Extensive research is being conducted on accelerated bridge construction (ABC) initiatives to reduce lane closure time. However, less attention has been devoted to accelerated repair and replacement of bridge deck expansion joints. This project developed methods for the accelerated replacement of bridge deck expansion joints, beginning with a literature review. The combination of a stainless steel railing and ultra-high-performance concrete (UHPC) header with hydrodemolition was evaluated for its effectiveness as an accelerated option. A life-cycle cost analysis with a sensitivity study compared the proposed replacement to current practices and two alternative methods. This analysis revealed that, for bridges with a life of greater than 50 years, the proposed replacement was the most cost-effective option. The proposed replacement joint also underwent bonding, static, and fatigue testing. Hydrodemolition was also used in the replacement process of the testing. These tests indicated that the joint system utilizing hydrodemolition produces an excellent bond with the existing concrete. The static and fatigue testing revealed the joint system meets department of transportation (DOT) standards and would likely have a long service life. Final Presentation https://abc-utc.fiu.edu/wp-content/uploads/sites/52/2020/12/ABC-UTC-Summary-Video-3.24.20.mp4
DOI: 10.6084/m9.figshare.14321715
title: Properties evaluation of semi-crystalline and amorphous polymers injected in AISI P20 molds repaired by welding

description: ABSTRACT &gt;Injection molds can fail after a certain period of use, which may compromise the final part’s integrity and quality, but that can be solved using welding repair processes. This work aimed to investigate the influence of AISI P20 molds repaired by Gas Tungsten Arc Welding (GTAW) and Nd-YAG laser-welding processes on the properties of injection-molded parts with semi-crystalline (polypropylene) and amorphous (polycarbonate and acrylonitrile butadiene and styrene terpolymer) thermoplastics. Welds were prepared by machining 0.8 mm-deep 40 mm x 5 mm grooves to be filled by GTAW and Nd-YAG laser-welding deposits, in order to simulate the repair of AISI P20 molds. All polymers were injected into weld-repaired and unrepaired molds, and then evaluated in terms of microstructure, crystallinity degree, mechanical properties and gloss. The results suggest that the repaired region for both studied welding processes, despite the difference in hardness of the weld region, does not significantly affect the properties of semi-crystalline and amorphous injected polymers.
DOI: 10.6084/m9.figshare.14321715.v1
title: Properties evaluation of semi-crystalline and amorphous polymers injected in AISI P20 molds repaired by welding

description: ABSTRACT &gt;Injection molds can fail after a certain period of use, which may compromise the final part’s integrity and quality, but that can be solved using welding repair processes. This work aimed to investigate the influence of AISI P20 molds repaired by Gas Tungsten Arc Welding (GTAW) and Nd-YAG laser-welding processes on the properties of injection-molded parts with semi-crystalline (polypropylene) and amorphous (polycarbonate and acrylonitrile butadiene and styrene terpolymer) thermoplastics. Welds were prepared by machining 0.8 mm-deep 40 mm x 5 mm grooves to be filled by GTAW and Nd-YAG laser-welding deposits, in order to simulate the repair of AISI P20 molds. All polymers were injected into weld-repaired and unrepaired molds, and then evaluated in terms of microstructure, crystallinity degree, mechanical properties and gloss. The results suggest that the repaired region for both studied welding processes, despite the difference in hardness of the weld region, does not significantly affect the properties of semi-crystalline and amorphous injected polymers.