|   | 
Details
   web
Records
Author (up) Antico, F.C.; Concha-Riedel, J.; Valdivia, I.; García Herrera, C.; Utrera, A.
Title The fracture mechanical behavior of the interface between animal fibers, mortar, and earth matrices. A theoretical and experimental approach Type
Year 2023 Publication Composites Part B-Engineering Abbreviated Journal Compos. B. Eng.
Volume 254 Issue Pages 110568
Keywords Pull-out behavior; Mortar; Natural fibers; Interfacial fracture toughness; Earth materials
Abstract Theoretical-experimental research is presented to address the mechanics and failure mode of the interface between two matrices with brittle behavior, earth and mortar, and pig hair, an organic fiber that is a massive waste from the food industry worldwide. A comprehensive statistical analysis of the pull-out force is presented, accounting for the effect of fiber embedded length, diameter variability, and age of the matrices. Experimental results are contrasted with fracture-mechanics theories to describe its behavior in this matter. Results show that neither fiber length, variability of diameter, nor the age of the matrix influences the pull-out force of both matrices evaluated in this work. Our results show the brittle nature of these interfaces, which was also observed using a high-speed camera. The tensile load of the fibers was compared to the pull-out force, showing that these fibers always work within their elastic regime. This work contributes directly to the sustainable goals 9, 11, and 15 enacted by the United Nations in 2015, by contributing to the understanding of the fracture mechanics of a waste product used as reinforcement of construction matrices.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1359-8368 ISBN Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ alexi.delcanto @ Serial 1718
Permanent link to this record
 

 
Author (up) Antico, F.C.; De la Varga, I.; Esmaeeli, H.S.; Nantung, T.E.; Zavattieri, P.D.; Weiss, W.J.
Title Using accelerated pavement testing to examine traffic opening criteria for concrete pavements Type
Year 2015 Publication Construction And Building Materials Abbreviated Journal Constr. Build. Mater.
Volume 96 Issue Pages 86-95
Keywords Early age-cracking; Opening to traffic; Accelerated pavement testing; Modeling; Finite element
Abstract The risk of cracking in a concrete pavement that is opened to traffic at early ages is related to the maximum tensile stress sigma(I), that develops in the pavement and its relationship to the measured, age dependent, flexural strength of a beam,f(r). The stress that develops in the pavement is due to several factors including traffic loading and restrained volume change caused by thermal or hygral variations. The stress that develops is also dependent on the time-dependent mechanical properties, pavement thickness, and subgrade stiffness. There is a strong incentive to open many pavements to traffic as early as possible to allow construction traffic or traffic from the traveling public to use the pavement. However, if the pavement is opened to traffic too early, cracking may occur that may compromise the service life of the pavement. The purpose of this paper is two-fold: (1) to examine the current opening strength requirements for concrete pavements (typically a flexural strength from beams, f(r)) and (2) to propose a criterion based on the time-dependent changes of sigma(I)/f(r), which accounts for pavement thickness and subgrade stiffness without adding unnecessary risk for premature cracking. An accelerated pavement testing (APT) facility was used to test concrete pavements that are opened to traffic at an early age to provide data that can be compared with an analytical model to determine the effective sigma(I)/f(r), based on the relevant features of the concrete pavement, the subgrade, and the traffic load. It is anticipated that this type of opening criteria can help the decision makers in two ways: (1) it can open pavement sections earlier thereby reducing construction time and (2) it may help to minimize the use of materials with overly accelerated strength gain that are suspected to be more susceptible to develop damage at early ages than materials that gain strength more slowly. (C) 2015 Elsevier Ltd. All rights reserved.
Address [Antico, F. C.; De la Varga, I.; Esmaeeli, H. S.; Zavattieri, P. D.; Weiss, W. J.] Purdue Univ, Lyles Sch Civil Engn, W Lafayette, IN 47907 USA, Email: zavattie@purdue.edu;
Corporate Author Thesis
Publisher Elsevier Sci Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0950-0618 ISBN Medium
Area Expedition Conference
Notes WOS:000361402700010 Approved
Call Number UAI @ eduardo.moreno @ Serial 750
Permanent link to this record
 

 
Author (up) Antico, F.C.; Rojas, P.; Briones, F.; Araya-Letelier, G.
Title Animal fibers as water reservoirs for internal curing of mortars and their limits caused by fiber clustering Type
Year 2021 Publication Construction And Building Materials Abbreviated Journal Constr. Build. Mater.
Volume 267 Issue Pages 120918
Keywords Internal curing; Animal fiber; Reinforced mortar; Fiber clusters; Valorized waste; Macroscopic properties; Durability
Abstract We present a bottom-up experimental research to address evidence of internal curing of mortars using randomly distributed pig-hair as water reservoirs. Plain and reinforced mortars with pig hair ranging from 0 to 8 kg of fibers per cubic meter of mortar were prepared. The microstructures of plain and reinforced mortars were scanned using electron microscopy and the microhardnesses were measured within

the bulk cement paste and cement paste near pig fibers. Electrical resistivity, surface absorption, and residual compressive strength of mortars after freeze-thaw cycles were used to test the effects of internal curing caused by pig hair. Natural fibers used to reinforce mortars increase their toughness and provide

part of the necessary water for internal curing, yet internal curing originated by the addition of natural fibers is not proportional to fiber dosage; where the potential to form fiber clusters increases as fiber dosage increases. Results show that there is an optimum fiber dosage that maximizes internal curing

caused by these fibers. This study contributes to the research on reinforced mortars with natural fibers to provide sustainable solutions for construction materials.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0950-0618 ISBN Medium
Area Expedition Conference
Notes WOS:000604573000032 Approved
Call Number UAI @ alexi.delcanto @ Serial 1267
Permanent link to this record
 

 
Author (up) Antico, F.C.; Wiener, M.J.; Araya-Letelier, G.; Retamal, R.G.
Title Eco-bricks: a sustainable substitute for construction materials Type
Year 2017 Publication Revista De La Construccion Abbreviated Journal Rev. Constr.
Volume 16 Issue 3 Pages 518-526
Keywords Eco-bricks; inorganic solid waste valorization; physical characterization; elastic modulus; nonstructural materials
Abstract Eco-bricks, polyethylene terephthalate (PET) bottles filled with mixed inorganic waste, have become a low cost construction material and a valid recycling method to reduce waste disposal in regions where industrial recycling is not yet available. Because Eco-bricks are filled with mixed recovered materials, potential recycling of its constituents is difficult at the end of its life. This study proposes considering Eco-bricks filled with a single inorganic waste material to work as a time capsule, with potential for recovering the filling material when other ways of waste valorization are available within those communities that currently have no better recycling options. This paper develops an experimental characterization of density, filler content (by volume), thermal shrinkage, elastic modulus and deformation recovery capacity using four different filler materials: 1) PET; 2) paper & cardboard; 3) tetrapack; and 4) metal. Overall, Eco-brick's density, thermal shrinkage and elastic modulus are dependent on the filler content. Density and elastic modulus of the proposed Eco-bricks are similar to values of medium-high density expanded polystyrene (EPS) used in nonstructural construction, reason why we suggest that these Eco-bricks might be a sustainable alternative to EPS or other nonstructural construction materials.
Address [Antico, Federico C.; Gonzalez Retamal, Raul] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Padre Hurtado 750, Vina Del Mar, Chile, Email: federico.antico@uai.cl;
Corporate Author Thesis
Publisher Pontificia Univ Catolica Chile, Escuela Construccion Civil Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0718-915x ISBN Medium
Area Expedition Conference
Notes WOS:000418898900016 Approved
Call Number UAI @ eduardo.moreno @ Serial 788
Permanent link to this record
 

 
Author (up) Araya-Letelier, G.; Antico, F.C.; Burbano-Garcia, C.; Concha-Riedeld, J.; Norambuena-Contreras, J.; Concha, J.; Saavedra Flores, E.I.
Title Experimental evaluation of adobe mixtures reinforced with jute fibers Type
Year 2021 Publication Construction and Building Materials Abbreviated Journal Constr. Build. Mater.
Volume 276 Issue 2021 Pages 122127
Keywords Jute fibers; Fiber-reinforced composites; Thermal conductivity; Mechanical characterization; Damage and durability assessment
Abstract Due to their sustainability as well as physical and mechanical performance, different natural fibers, both vegetal and animal fibers, have been successfully used in adobe mixtures (AMs) to enhance properties such as cracking control, flexural toughness and water erosion resistance, among others. However, the use of jute fibers (JFs), one of the most largely produced vegetal fiber worldwide, has not been extensively studied on AMs. Consequently, this study evaluates the effects of the incorporation of varying dosages (0.5 and 2.0 wt%) and lengths (7, 15, and 30 mm) of JFs on the physical/thermal/mechanical/fracture and durability performance of AMs, a specific type of earth-based construction material widely used globally. Experimental results showed that the incorporation of 2.0 wt% dosages of JFs increased the capillary water absorption of AMs, which might affect AM durability. The latter result could be explained by the additional porosity generated by the spaces left between the JFs and the matrix of adobe, as well as the inherent water absorption of the JFs. The incorporation of JFs significantly improved the behavior of AMs in terms of thermal conductivity, drying shrinkage cracking control, flexural toughness and water erosion performance, without affecting their compressive and flexural strength. For example, flexural toughness indices were increased by 297% and crack density ratio as well as water erosion depth values were reduced by 93% and 62%, respectively, when 2.0 wt%-15 mm length JFs were incorporated into AM. Since the latter combination of JF dosage and length provided the overall best results among AMs, it is recommended by this study as JF-reinforcement scheme for AMs for construction applications such as adobe masonry and earth plasters.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0950-0618 ISBN Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ alexi.delcanto @ Serial 1315
Permanent link to this record
 

 
Author (up) Araya-Letelier, G.; Antico, F.C.; Carrasco, M.; Rojas, P.; Garcia-Herrera, C.M.
Title Effectiveness of new natural fibers on damage-mechanical performance of mortar Type
Year 2017 Publication Construction And Building Materials Abbreviated Journal Constr. Build. Mater.
Volume 152 Issue Pages 672-682
Keywords Animal fiber; Fiber-reinforced mortar; Mechanical properties; Damage mitigation
Abstract Addition of fibers to cement-based materials improve tensile and flexural strength, fracture toughness, abrasion resistance, delay cracking, and reduce crack widths. Natural fibers have recently become more popular in the construction materials community. This investigation addresses the characterization of a new animal fiber (pig hair), a massive food-industry waste worldwide, and its use in mortars. Morphological, physical and mechanical properties of pig hair are determined in order to be used as reinforcement in mortars. A sensitivity analysis on the volumes of fiber in mortars is developed. The results from this investigation showed that reinforced mortars significantly improve impact strength, abrasion resistance, plastic shrinkage cracking, age at cracking, and crack widths as fiber volume increases. Other properties such as compressive and flexural strength, density, porosity and modulus of elasticity of reinforced mortars are not significantly affected by the addition of pig hair. (C) 2017 Elsevier Ltd. All rights reserved.
Address [Araya-Letelier, G.; Carrasco, M.] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Ave Diagonal Las Torres 2640, Santiago 7941169, Chile, Email: gerardo.araya@uai.cl;
Corporate Author Thesis
Publisher Elsevier Sci Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0950-0618 ISBN Medium
Area Expedition Conference
Notes WOS:000411545600062 Approved
Call Number UAI @ eduardo.moreno @ Serial 803
Permanent link to this record
 

 
Author (up) Araya-Letelier, G.; Concha-Riedel, J.; Antico, F.C.; Sandoval, C.
Title Experimental mechanical-damage assessment of earthen mixes reinforced with micro polypropylene fibers Type
Year 2019 Publication Construction And Building Materials Abbreviated Journal Constr. Build. Mater.
Volume 198 Issue Pages 762-776
Keywords Micro polypropylene fibers; Fiber-reinforced earthen mixes; Conservation; Impact strength; Damage
Abstract The addition of engineered polypropylene fibers to earthen materials offers new opportunities to control their damage evolution and mechanical properties that altogether provides more reliability and extends the life span of these materials. The latter is of special interest considering that earthen materials are still widely used in the form of adobe blocks for earthen masonry, cob, rammed earth or even earthen mortars for new construction and conservation of historic buildings. In this work, the effect of dosage of micro polypropylene fibers (MPPF) in the damage-mechanical performance of earthen mixes is studied experimentally. Part of the experiments includes two different tests to assess distributed and localized cracking of reinforced earth subject to restrained drying shrinkage. In addition, the experimental results showed that the incorporation of MPPF increases up to 83 times the impact strength and 11 times the flexural toughness of earthen mixes. Other mechanical properties such as compressive and flexural strength are not statistically affected by the incorporation of MPPF. (C) 2018 Elsevier Ltd. All rights reserved.
Address [Araya-Letelier, G.] Pontificia Univ Catolica Chile, Escuela Construcc Civil, Casilla 306,Correo 22, Santiago, Chile, Email: gerardo.araya@uc.cl;
Corporate Author Thesis
Publisher Elsevier Sci Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0950-0618 ISBN Medium
Area Expedition Conference
Notes WOS:000457952200066 Approved
Call Number UAI @ eduardo.moreno @ Serial 978
Permanent link to this record
 

 
Author (up) Araya-Letelier, G.; Concha-Riedel, J.; Antico, F.C.; Valdes, C.; Caceres, G.
Title Influence of natural fiber dosage and length on adobe mixes damage-mechanical behavior Type
Year 2018 Publication Construction And Building Materials Abbreviated Journal Constr. Build. Mater.
Volume 174 Issue Pages 645-655
Keywords Adobe mixes; Animal fiber; Mechanical properties; Damage control; Fiber-reinforced
Abstract This study addresses the use of a natural fiber (pig hair), a massive food-industry waste, as reinforcement in adobe mixes (a specific type of earthen material). The relevance of this work resides in the fact that earthen materials are still widely used worldwide because of their low cost, availability, and low environmental impact. Results show that adobe mixes' mechanical-damage behavior is sensitive to both (i) fiber dosage and (ii) fiber length. Impact strength and flexural toughness are increased, whereas shrinkage distributed crack width is reduced. Average values of compressive and flexural strengths are reduced as fiber dosage and length increase, as a result of porosity generated by fiber clustering. Based on the results of this work a dosage of 0.5% by weight of dry soil using 7 mm fibers is optimal to improve crack control, flexural toughness and impact strength without statistically affecting flexural and compressive strengths. (C) 2018 Elsevier Ltd. All rights reserved.
Address [Araya-Letelier, G.] Pontificia Univ Catolica Chile, Fac Ingn, Escuela Construcc Civil, Ave Vicuna Mackenna 4860, Santiago 7820436, Chile, Email: gerardo.araya@uc.cl;
Corporate Author Thesis
Publisher Elsevier Sci Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0950-0618 ISBN Medium
Area Expedition Conference
Notes WOS:000433656300061 Approved
Call Number UAI @ eduardo.moreno @ Serial 873
Permanent link to this record
 

 
Author (up) Araya-Letelier, G.; Maturana, P.; Carrasco, M.; Antico, F.C.; Gomez, M.S.
Title Mechanical-Damage Behavior of Mortars Reinforced with Recycled Polypropylene Fibers Type
Year 2019 Publication Sustainability Abbreviated Journal Sustainability
Volume 11 Issue 8 Pages 17 pp
Keywords recycled polypropylene fiber; fiber-reinforced mortar; mechanical performance; damage reduction; waste valorization
Abstract Commercial polypropylene fibers are incorporated as reinforcement of cement-based materials to improve their mechanical and damage performances related to properties such as tensile and flexural strength, toughness, spalling and impact resistance, delay formation of cracks and reducing crack widths. Yet, the production of these polypropylene fibers generates economic costs and environmental impacts and, therefore, the use of alternative and more sustainable fibers has become more popular in the research materials community. This paper addresses the characterization of recycled polypropylene fibers (RPFs) obtained from discarded domestic plastic sweeps, whose morphological, physical and mechanical properties are provided in order to assess their implementation as fiber-reinforcement in cement-based mortars. An experimental program addressing the incorporation of RPFs on the mechanical-damage performance of mortars, including a sensitivity analysis on the volumes and lengths of fiber, is developed. Using analysis of variance, this paper shows that RPFs statistically enhance flexural toughness and impact strength for high dosages and long fiber lengths. On the contrary, the latter properties are not statistically modified by the incorporation of low dosages and short lengths of RPFs, but still in these cases the incorporation of RPFs in mortars have the positive environmental impact of waste encapsulation. In the case of average compressive and flexural strength of mortars, these properties are not statistically modified when adding RPFs.
Address [Araya-Letelier, Gerardo; Maturana, Pablo; Soledad Gomez, Maria] Pontificia Univ Catolica Chile, Escuela Construcc Civil, Ave Vicuna Mackenna 4860, Santiago 7820436, Chile, Email: gerardo.araya@uc.cl;
Corporate Author Thesis
Publisher Mdpi Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2071-1050 ISBN Medium
Area Expedition Conference
Notes WOS:000467752200013 Approved
Call Number UAI @ eduardo.moreno @ Serial 1001
Permanent link to this record
 

 
Author (up) Concha-Riedel, J., Antico, F.C., Araya-Letelier, G.
Title Mechanical and damage similarities of adobe blocks reinforced with natural and industrial fibres Type
Year 2020 Publication Revista Materia Abbreviated Journal Materia
Volume 25 Issue 4 Pages 11pp
Keywords Crack control, natural fibres, industrial fibres, adobe blocks, impact strength
Abstract Adobe is an earthen-based material that consists of the use of a clayey soil and, most of the times, straw fibres to manufacture blocks that are afterwards sundried. This study reviews the use of three types of fibres:

vegetal, industrial and animal, for the manufacture of adobe blocks. Overall, all the fibres increase at least one order of magnitude the impact strength of plain adobe blocks and reduced the shrinkage cracking of adobe plasters in at least 50% with respect to plain adobe. Compressive and flexural strength average values were not increased nor decreased by the addition of fibres. The intrinsic variability of the mechanical properties of plain adobe persists with any of the fibres tested in this study. Based on the findings of this study, we recommend using jute fibres with a dosage of 0.5% and a length of 30 mm.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1517-7076 ISBN Medium
Area Expedition Conference
Notes Approved
Call Number UAI @ alexi.delcanto @ Serial 1266
Permanent link to this record
 

 
Author (up) Concha-Riedel, J.; Antico, F.C.; Lopez-Querol, S.
Title Mechanical strength, mass loss and volumetric changes of drying adobe matrices combined with kaolin and fine soil particles Type
Year 2021 Publication Construction And Building Materials Abbreviated Journal Constr. Build. Mater.
Volume 312 Issue Pages 125246
Keywords Earth blocks; Kaolin; Mechanical strength; Drying shrinkage; Clay; Soil fine-particles; Adobe matrix; Chemical Shrinkage
Abstract Earthen construction represents almost 30% of the housing in developing countries, partially because of its low cost compared to steel and concrete construction, and also because the raw materials are available almost everywhere. One of the biggest disadvantages of earthen materials is the lack of information and variety on their constitutive materials, specifically their soil type. This work addresses the physical and mechanical properties of adobe matrices containing different concentrations of kaolin, which is a specific type of clay, as well as different proportions of fine particles of the original soil of the adobe matrix. All adobe matrices were manufactured with a SM-SC soil obtained from Santiago, Chile, and had concentrations of 0, 10, 30, and 50% of kaolin and 0, 10, 20, and 30% fines of the original soil content. It is concluded that the compressive strength of the studied earthen mixtures improves when kaolin is added to the mixture. The shrinkage of adobe matrices with kaolin compared to plain adobe matrices was reduced during the first days of age and stayed stable after that. This work shows that the inclusion of fines from the original soil (other than kaolin) did not significantly affect any of the studied properties. It also shows that the Unified Soil Classification System is not sufficient to characterize soils for adobe matrices.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0950-0618 ISBN Medium
Area Expedition Conference
Notes WOS:000722640300001 Approved
Call Number UAI @ alexi.delcanto @ Serial 1503
Permanent link to this record