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Guarin, Alvaro
Publications (10 of 19) Show all publications
Yang, Y., Zhu, X., Jelagin, D., Guarin, A. & Ong, G. P. (2023). Numerical analysis of hydroplaning and veer-off risk of dual-tyre on a wet runway. The international journal of pavement engineering, 24(1), Article ID 2229479.
Open this publication in new window or tab >>Numerical analysis of hydroplaning and veer-off risk of dual-tyre on a wet runway
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2023 (English)In: The international journal of pavement engineering, ISSN 1029-8436, E-ISSN 1477-268X, Vol. 24, no 1, article id 2229479Article in journal (Refereed) Published
Abstract [en]

The phenomenon of hydroplaning poses a risk when landing an aircraft on a wet runway. This study developed a finite element (FE) framework comprising a dual-tyre model, water film models, a runway model, and an interaction model to investigate wet runway landings. The dual-tyre model was created with a geometric description and material properties. Water film models for even and uneven water depths were constructed based on a coupled Eulerian-Lagrangian algorithm. The runway model was obtained through surface scanning and 3D reconstruction. The interaction model was calculated using the power spectrum density and viscoelastic property of rubber. Based on the FE approach, the effect of the slip ratio on the hydroplaning phenomenon was discussed. The results indicated that hydroplaning speed generally increases with the slip ratio. Furthermore, single- and dual-tyre wet runway landings with an even water film depth were simulated, and the results revealed similar accuracy between the two landing types. Next, the study of dual-tyre landings indicated that landings in varying depths of water face the risks of hydroplaning and veering off simultaneously. The FE approach was further used to analyse dual-tyre landings on runways with a yaw angle.

Place, publisher, year, edition, pages
Informa UK Limited, 2023
Keywords
Finite element analysis, hydroplaning, dual-tyre, surface texture, runway surface reconstruction
National Category
Oceanography, Hydrology and Water Resources
Identifiers
urn:nbn:se:kth:diva-337336 (URN)10.1080/10298436.2023.2229479 (DOI)001061326500001 ()2-s2.0-85170224901 (Scopus ID)
Note

QC 20231002

Available from: 2023-10-02 Created: 2023-10-02 Last updated: 2023-10-02Bibliographically approved
Zhu, X., Yang, Y., Zhao, H., Elaguine, D., Chen, F., Gilabert, F. A. & Guarin, A. (2021). Effects of surface texture deterioration and wet surface conditions on asphalt runway skid resistance. Tribology International, 153, Article ID 106589.
Open this publication in new window or tab >>Effects of surface texture deterioration and wet surface conditions on asphalt runway skid resistance
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2021 (English)In: Tribology International, ISSN 0301-679X, E-ISSN 1879-2464, Vol. 153, article id 106589Article in journal (Refereed) Published
Abstract [en]

The friction force for aircraft landing is mainly provided by the texture of runway surfaces. The mechanism underlying friction force generation is the energy dissipation of tire rubber materials during random excitation induced by asperities. However, the runway surface texture is deteriorated by cyclic loading and environmental effects during the service life of a runway, leading to loss of braking force and extension of landing distance. Additionally, when an aircraft lands on a wet runway at a high velocity, the hydrodynamic force causes the tires to detach from the runway surface, which is risky and may lead to the loss of aircraft control and runway excursion. Worn-out surfaces along with wet conditions increase the risk of poor control during aircraft landing. Accordingly, this study investigated three types of asphalt runways (SMA-13, AC-13, and OGFC-13). Surface texture deterioration was simulated using a surface texture wear algorithm. Kinematic friction models were established based on the viscoelastic property of rubber materials, power spectrum density, and statistics of surface textures. A finite element model was developed by considering a real rough runway surface and different water film depths (3, 7, and 10 mm). A comparison of hydroplaning speed was conducted between numerical simulation and former experiments. The effects of different factors, such as velocity, wear ratio, runway type, water film depth, and slip ratio, on the skid resistance of the runway were analyzed.

Place, publisher, year, edition, pages
Elsevier Ltd, 2021
Keywords
Finite element analysis, Friction deterioration, Hydroplaning, Pavement reconstruction, Pavement surface texture, Aircraft, Aircraft control, Aircraft landing, Asphalt, Deterioration, Energy dissipation, Friction, Rubber, Textures, Wear of materials, Friction models, Hydrodynamic forces, Power spectrum density, Random excitations, Runway excursions, Surface textures, Tire rubber materials, Viscoelastic properties, Skid resistance
National Category
Infrastructure Engineering
Identifiers
urn:nbn:se:kth:diva-285297 (URN)10.1016/j.triboint.2020.106589 (DOI)000582755900027 ()2-s2.0-85089739985 (Scopus ID)
Note

QC 20201202

Available from: 2020-12-02 Created: 2020-12-02 Last updated: 2024-01-09Bibliographically approved
Yang, Y., Zhu, X., Jelagin, D., Guarin, A. & Steyn, W. J. (2021). Numerical analysis concerning the skid resistance of rubber-contaminated runway grooves. Tribology International, 163, Article ID 107157.
Open this publication in new window or tab >>Numerical analysis concerning the skid resistance of rubber-contaminated runway grooves
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2021 (English)In: Tribology International, ISSN 0301-679X, E-ISSN 1879-2464, Vol. 163, article id 107157Article in journal (Refereed) Published
Abstract [en]

Runway grooves are essential for water drainage and skid resistance; although the skid resistance of runway grooves has been studied, research on the frictional properties of runway grooves remains limited. This study presents a numerical method for analyzing the skid resistance of runway grooves. A aircraft tire model was developed with rubber and belt layer materials. A grooved runway sample was obtained by simulating the grooves on a runway surface specimen. A numerical algorithm was employed on the runway sample to simulate groove closure caused by rubber deposits; the degree of closure was defined as the percentage of closed grooves resulting from rubber deposits. An interaction model was developed according to the power spectrum density of a grooved runway and the viscoelastic properties of tread rubber. The numerical simulation results were verified using a runway skid resistance field test. The effects of groove closure due to rubber deposit contamination and groove geometry were analyzed. Friction increased as groove depth and width increased, but friction decreased as groove spacing and degree of closure increased.

Place, publisher, year, edition, pages
Elsevier BV, 2021
Keywords
Airport runway, Runway grooves, Friction coefficient, Finite element model, Airport runway management, Rubber deposits, Numerical simulation
National Category
Other Mechanical Engineering
Identifiers
urn:nbn:se:kth:diva-300951 (URN)10.1016/j.triboint.2021.107157 (DOI)000687308600003 ()2-s2.0-85109732517 (Scopus ID)
Note

QC 20210903

Available from: 2021-09-03 Created: 2021-09-03 Last updated: 2025-02-14Bibliographically approved
Sun, G., Sun, D., Guarin, A., Ma, J., Chen, F. & Ghafooriroozbahany, E. (2019). Low temperature self-healing character of asphalt mixtures under different fatigue damage degrees. Construction and Building Materials, 223, 870-882
Open this publication in new window or tab >>Low temperature self-healing character of asphalt mixtures under different fatigue damage degrees
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2019 (English)In: Construction and Building Materials, ISSN 0950-0618, E-ISSN 1879-0526, Vol. 223, p. 870-882Article in journal (Refereed) Published
Abstract [en]

The primary objective of this study is to advance the understanding of the low temperature self-healing character of asphalt mixtures under different damage degrees, thus to determine the effective strategy of asphalt pavement maintenance. Firstly, three kinds of asphalt mixtures are selected to conduct the indirect tensile (IDT) fatigue test to a certain fatigue damage degree at low temperatures, and then the resilient modulus (Mr) at different rest time is measured to quantify the healing potential. Next, the fatigue loading with different intermittent time (0 s, 1 s and 3 s) is applied to determine the impact of intermittent time on healing potential. The results indicate that the descending order of healing potential of asphalt mixtures is: SMA-11 > AC-8 > AC-11 at 5 degrees C and -5 degrees C. The loading intermittent time has an obvious effect on the fatigue damage state of asphalt mixtures, while the longer the intermittent time, the less the effect on fatigue damage healing. Besides, the fatigue damage state has great influence on its healing potential of asphalt mixture. Under the low damage conditions, the initial healing rate is greater than the long term healing rate. However, the low temperature (-5 degrees C) dramatically reduces the healing rate of asphalt mixtures, and causes their long-term healing rate to stabilize gradually to a very low level. Especially under the high fatigue damage conditions, the healing potential of asphalt mixtures will almost disappear at -5 degrees C. Furthermore, together with meso-scale Computed Tomography (CT) scanning technique, it is found that the intemal crack distribution characteristics of different graded asphalt mixtures are different even under the same damage degree, which may explain the differences in the healing potential of asphalt mixtures. The use of a fast two-dimensional (2D) scanning technology further confirms that the crack zones inside the asphalt mixture are gradually shrinking after a period of high temperature healing. Finally, the Grey relational analysis reveals that the healing time has the most significant influence on the healing potential of asphalt mixtures. The gradation type and temperature have the similar influence level on the healing potential. The correlation degree between the fatigue damage degree and healing potential is the smallest compared with the other three factors. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCI LTD, 2019
Keywords
Indirect tensile (IDT) fatigue, Damage degree, Healing potential, Computed Tomography (CT), Asphalt mixtures
National Category
Civil Engineering
Research subject
Civil and Architectural Engineering
Identifiers
urn:nbn:se:kth:diva-262769 (URN)10.1016/j.conbuildmat.2019.07.040 (DOI)000487569100075 ()2-s2.0-85068884490 (Scopus ID)
Note

QC 20191022

Available from: 2019-10-22 Created: 2019-10-22 Last updated: 2022-06-26Bibliographically approved
Sun, D., Sun, G., Zhu, X., Guarin, A., Li, B., Dai, Z. & Ling, J. (2018). A comprehensive review on self-healing of asphalt materials: Mechanism, model, characterization and enhancement. Advances in Colloid and Interface Science, 256, 65-93
Open this publication in new window or tab >>A comprehensive review on self-healing of asphalt materials: Mechanism, model, characterization and enhancement
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2018 (English)In: Advances in Colloid and Interface Science, ISSN 0001-8686, E-ISSN 1873-3727, Vol. 256, p. 65-93Article, review/survey (Refereed) Published
Abstract [en]

Self-healing has great potential to extend the service life of asphalt pavement, and this capability has been regarded as an important strategy when designing a sustainable infrastructure. This review presents a comprehensive summary of the state-of-the-art investigations concerning the self-healing mechanism, model, characterization and enhancement, ranging from asphalt to asphalt pavement. Firstly, the self-healing phenomenon as a general concept in asphalt materials is analyzed including its definition and the differences among self healing and some viscoelastic responses. Additionally, the development of self-healing in asphalt pavement design is introduced. Next, four kinds of possible self-healing mechanism and corresponding models are presented. It is pointed out that the continuum thermodynamic model, considering the whole process from damage initiation to healing recovery, can be a promising study field. Further, a set of self-healing multiscale characterization methods from microscale to macroscale as well as computational simulation scale, are summed up. Thereinto, the computational simulation shows great potential in simulating the self-healing behavior of asphalt materials from mechanical and molecular level. Moreover, the factors influencing self-healing capability are discussed, but the action mechanisms of some factors remain unclear and need to be investigated. Finally, two extrinsic self healing technologies, induction heating and capsule healing, are recommended as preventive maintenance applications in asphalt pavement In future, more effective energy-based healing systems or novel material-based healing systems are expected to be developed towards designing sustainable long-life asphalt pavement (

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV, 2018
Keywords
Self-healing capability, Asphalt materials, Self-healing mechanism, Multiscale characterization, Self-healing enhancement
National Category
Civil Engineering
Identifiers
urn:nbn:se:kth:diva-233612 (URN)10.1016/j.cis.2018.05.003 (DOI)000441117500004 ()29789126 (PubMedID)2-s2.0-85047194305 (Scopus ID)
Note

QC 20180827

Available from: 2018-08-27 Created: 2018-08-27 Last updated: 2024-03-18Bibliographically approved
Ahmed, L. & Guarin, A. (2018). Crack propagation under water pressure. Stockholm/Sweden
Open this publication in new window or tab >>Crack propagation under water pressure
2018 (English)Report (Refereed)
Abstract [en]

Cracks in concrete structures such as a concrete dam can be exposed to water pressure, for example, uplift pressure. The water pressure can be significant and may result in cracks propagating through the structures and thus it may result in reduced service life. However, the knowledge of water pressure within the cracks is relatively limited and is often neglected or just roughly estimated. The influence of crack opening rate on the uplift pressure distribution in the crack and the pressure variation during opening or sudden crack closure are questions needed to investigate. As an attempt to answer those questions, a pilot study presented here describes the possibilities and limitations of the proposed experimental setup; and technology (penetrability meter and tomography) as an examination method for water pressure in propagation concrete cracks. The test specimens examined here are exclusively cylinders cast of concrete with or without an initial crack.

The penetrability meter can be used to apply water pressure and to visualize the crack opening, X-Ray computed tomography test, was performed. KTH Civil and Architectural Engineering department has organized the laboratory resources.

The examples reported in this work show that the technology and equipment have great potential for future work on crack propagation, however, sample design and preparation, as well as testing need further development.

Place, publisher, year, edition, pages
Stockholm/Sweden: , 2018
National Category
Civil Engineering
Identifiers
urn:nbn:se:kth:diva-235263 (URN)
Note

QC 20180920

Available from: 2018-09-19 Created: 2018-09-19 Last updated: 2022-10-24Bibliographically approved
Ghafoori Roozbahany, E., Partl, M. & Guarin, A. (2018). Influence of layer thickness on the flow of asphalt under simulated compaction. In: Bearing Capacity of Roads, Railways and Airfields - Proceedings of the 10th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCRRA 2017: . Paper presented at 10th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCRRA 2017, 28 June 2017 through 30 June 2017 (pp. 1435-1441). CRC Press/Balkema
Open this publication in new window or tab >>Influence of layer thickness on the flow of asphalt under simulated compaction
2018 (English)In: Bearing Capacity of Roads, Railways and Airfields - Proceedings of the 10th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCRRA 2017, CRC Press/Balkema , 2018, p. 1435-1441Conference paper, Published paper (Refereed)
Abstract [en]

Compaction is one of the most important phases in the life cycle of asphalt pavements and has therefore been a hot subject of research for a long time. However, despite of valuable research efforts on this topic, a remarkable gap between laboratory and field measurements still remains. Moreover, whereas most of the experimental methods are carried out on compacted pavement material, methods for evaluating compactability of asphalt mixtures for increasing the fundamental knowledge about internal movements within the asphalt during compaction are only scarce. Hence, in this study, a recently developed tool for simulating the compaction process with respect to the particle flow, i.e. Compaction Flow Test (CFT), was used along with simultaneous X-ray imaging for investigating the impact of thickness changes on two different asphalt mixture structures in terms of the compaction effort as well as flow pattern differences. The results of the investigation provided reasonably useful input for building up a better understanding of the behavior of mixtures under compaction loads. This method was able to successfully reveal the differences of the structural rearrangements within the asphalt mixtures for three different lift thicknesses. It also helped to explain some of the previous research studies results in a more comprehensive way. The achievements of this study may serve for developing an in-site evaluating test method for assessing compactability of asphalt mixtures before placing them on the roads.

Place, publisher, year, edition, pages
CRC Press/Balkema, 2018
Keywords
Compactability, Lift thickness, Particle flow, X-ray computed tomography, Bearing capacity, Compaction, Computerized tomography, Flow patterns, Life cycle, Mixtures, Railroads, Compaction effort, Compaction process, Experimental methods, Field measurement, Structural rearrangement, Asphalt mixtures
National Category
Civil Engineering
Identifiers
urn:nbn:se:kth:diva-247234 (URN)10.1201/9781315100333-205 (DOI)2-s2.0-85058531077 (Scopus ID)9781138295957 (ISBN)
Conference
10th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCRRA 2017, 28 June 2017 through 30 June 2017
Note

QC 20190402

Available from: 2019-04-02 Created: 2019-04-02 Last updated: 2022-10-24Bibliographically approved
Ansell, A., Nordström, E. & Guarin, A. (2018). Laboratory investigation of steel fibre reinforced sprayed concrete using a computed tomography method. In: Eight International Symposium on SPRAYED CONCRETE - Modern Use of Wet Mix Sprayed Concrete for Underground Support: . Paper presented at 8th International Symposium on Sprayed Concrete, Trondheim (pp. 24-38).
Open this publication in new window or tab >>Laboratory investigation of steel fibre reinforced sprayed concrete using a computed tomography method
2018 (English)In: Eight International Symposium on SPRAYED CONCRETE - Modern Use of Wet Mix Sprayed Concrete for Underground Support, 2018, p. 24-38Conference paper, Published paper (Refereed)
Abstract [en]

A laboratory method for investigation of cored samples of steel fibre reinforced sprayed concrete (shotcrete) is described. A pilot study on computed tomography (CT) has been conducted, with focus on how the technique can be used for non-destructive testing where the cores remain intact after scanning and evaluation. The CT method require advanced integrated equipment for X-ray scanning and image detection, together with a computerized visualization system that can reproduce a threedimensional virtual, transparent model of the studied object. The method is well suited to describe orientation and distribution of steel fibres within the concrete. Interfaces between rock-concrete and concrete-concrete, between layers of differentsequences ofspraying, can also be identified. The results from the CT investigations can be presented as qualitative data that in 3D shows locations of steel fibres, aggregates, etc., and also as quantitative data showing relative distributions of cement paste, aggregates, steel fibres and voids, which is here demonstrated by a selection of examples. The method is well suited for practical analysis of sprayed concrete in situ specimens and it is recommended that it is established as a standard method for special inspections and performance evaluation of rock support in tunnels and subspace structures.

National Category
Civil Engineering
Research subject
Civil and Architectural Engineering
Identifiers
urn:nbn:se:kth:diva-235256 (URN)
Conference
8th International Symposium on Sprayed Concrete, Trondheim
Note

QC 20181008

Available from: 2018-09-19 Created: 2018-09-19 Last updated: 2024-03-15Bibliographically approved
Ansell, A., Ahmed, L. & Guarin, A. (2017). Computed tomography as investigation method for steel fibre reinforced tunnel shotcrete. In: : . Paper presented at XXIII Symposium on Nordic Concrete Research & Development, Aalborg (pp. 63-66).
Open this publication in new window or tab >>Computed tomography as investigation method for steel fibre reinforced tunnel shotcrete
2017 (English)Conference paper, Published paper (Refereed)
National Category
Civil Engineering
Research subject
Civil and Architectural Engineering
Identifiers
urn:nbn:se:kth:diva-235252 (URN)
Conference
XXIII Symposium on Nordic Concrete Research & Development, Aalborg
Note

QC 20180920

Available from: 2018-09-19 Created: 2018-09-19 Last updated: 2024-03-15Bibliographically approved
Namutebi, M., Birgisson, B., Guarin, A. & Jelagin, D. (2017). Exploratory study on bitumen content determination for foamed bitumen mixes based on porosity and indirect tensile strength. Journal of Traffic and Transportation Engineering (English Edition), 4(2), 131-144
Open this publication in new window or tab >>Exploratory study on bitumen content determination for foamed bitumen mixes based on porosity and indirect tensile strength
2017 (English)In: Journal of Traffic and Transportation Engineering (English Edition), ISSN 2095-7564, Vol. 4, no 2, p. 131-144Article in journal (Refereed) Published
Abstract [en]

Optimum bitumen content determination is one of the major aims for foamed bitumen mix design. However, mix design procedures for foamed bitumen mixes are still under development. In this paper a method to determine the optimum bitumen content for given foamed bitumen mix based on primary aggregate structure porosity and indirect tensile strength criterion is proposed. Using packing theory concepts, the aggregate gradation is divided into three aggregate structures which are oversize, primary and secondary structures. Porosity for the primary aggregate structure is determined for given bitumen contents. A maximum value for porosity of 50% for the primary aggregate structure is used to choose initial bitumen content. Furthermore, a minimum indirect tensile strength criteria is suggested to refine this bitumen content. This method enables a bitumen content value to be chosen prior to the start of experimental work, as porosity is expressed in terms of physical parameters such as aggregate and binder specific gravity, and aggregate gradation which are known before the mix design process. The bitumen content is then later refined when the indirect tensile strength is determined in the laboratory. This method would reduce resources such as time and materials that may be required during the mix design procedure.

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
Foamed bitumen, Bitumen content, Aggregate, Porosity, Gradation framework, Indirect tensile strength
National Category
Civil Engineering
Research subject
Civil and Architectural Engineering
Identifiers
urn:nbn:se:kth:diva-193949 (URN)10.1016/j.jtte.2016.11.002 (DOI)000426990600004 ()2-s2.0-85017381878 (Scopus ID)
Funder
Swedish Foundation for Strategic Research
Note

QC 20161013

Available from: 2016-10-13 Created: 2016-10-13 Last updated: 2024-03-18Bibliographically approved
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