David Avalos Cueva - Academia.edu (original) (raw)

Papers by David Avalos Cueva

Materials

Mode I fracture (tensile type) is the common cracking mode of asphalt pavements, which is caused ... more Mode I fracture (tensile type) is the common cracking mode of asphalt pavements, which is caused by thermal cyclic loading or traffic. Some studies allow the analysis of the fracture modes by means of standardized tests, some of which are limited, difficult, with little repeatability or do not generate an adequate tension state. In this paper, mode I fracture toughness of asphalt mixtures with symmetric geometry specimens at intermediate temperature is evaluated. Experimental results from direct tension test and simulations on asphalt mix specimens subjected to intermediate temperatures of 10, 20 and 30 °C, mode I load rates (0.5, 1 and 2 mm/min) and notches (2 and 3 cm) were compared to find the variables that reflect the operating conditions of the asphalt mix. Results showed that shear stresses are 8.12% lower in the simulations with respect to the tests, while the load-deformation curves show 30% and 35% variation, where the temperature of 20 °C, the notch of 2 cm and the loadin...

Materials, 2022

Reclaimed asphalt pavements (RAP) provide economic and environmental benefits. In recent decades,... more Reclaimed asphalt pavements (RAP) provide economic and environmental benefits. In recent decades, their use has increased, but rheological properties are affected by RAP aging, increasing stiffness, cracking, and susceptibility to water. To counteract these effects, rejuvenating agents are used, but they must be properly dosed to design quality mixtures. Therefore, different binders were analyzed, including virgin binder (VBB), binder modified by SBS polymer (MB), AC-RAP, binder softened using a rejuvenating agent, and binders softened with doses (15%, 30%, and 45%) of AC-RAP. The rheological properties were evaluated by dynamic shear rheometry (DSR) and beam-bending rheometry (BBR) tests, while the linear amplitude sweep (LAS) test was used to measure fatigue cracking and the multiple stress creep recovery (MSCR) test was used to measure rutting. A mixing chart was constructed based on a high temperature AC-RAP to satisfy the performance grade (PG 76-22). The results showed that so...

Ra Ximhai, 2017

In this study performed the simulation of currents generated by the wind on the Bay of Chetumal, ... more In this study performed the simulation of currents generated by the wind on the Bay of Chetumal, Quintana Roo through the use of a stationary shallow-water model. A homogeneous climatic wind was used for the entire Bay, with a velocity of 3m·s-1 , and directions North, South, Northeast, Northwest, East, Southeast, Southwest and West. The results showed a rather complex dynamics in Chetumal Bay, in which important turns were observed in deep areas, with speeds reaching up to 13 cm·s-1 .

Geofísica Internacional, 2016

Measurements of temperature, currents and lake level taken in 2005-2014 are analyzed and discusse... more Measurements of temperature, currents and lake level taken in 2005-2014 are analyzed and discussed. Moored measurements of temperature and level in the northern part of the lake reveal the presence of seiches oscillations of the first and second modes, with periods of 5.7 and 2.8 hours, and amplitudes of 15.4 and 2.1 mm. In 2006 four temperature cross-sections were carried out in the study area. The obtained data reveal that in all four seasons of the year the temperatures averaged over the north and south coastal areas differ by 2-3°C. The lake currents were simulated using the HAMSOM 2-D hydrodynamic model both for wet and dry seasons. The model results are in good agreement with the ADCP data. The presence of an anticyclonic gyre, 10-12 km in diameter, in the central part of the lake in both seasons is revealed. In particular, the summer 2014 data provide evidence of the gyre and its impact on the spatial distribution of temperature in the lake.

Ra Ximhai, 2017

Se analizan series de tiempo de variables meteorológicas obtenidas por reanálisis, en diferentes ... more Se analizan series de tiempo de variables meteorológicas obtenidas por reanálisis, en diferentes zonas de la costa mexicana del Océano Pacífico y se comparan la climatología con las variabilidades interanuales, donde se establece que la mayor variabilidad interanual está asociada a El Niño - Oscilación del Sur.

Construction and Building Materials, 2019

The densification through SGC reduces the compaction temperature of WMA. Adding 1.5 and 3% of gre... more The densification through SGC reduces the compaction temperature of WMA. Adding 1.5 and 3% of greasy diamide (additive) reduces the compaction temperature. Additive reduces the phase angle and increase the dynamic shear rheological modulus. Greasy diamide added up to 3% improved the viscosity and the lubricity of the WMA. The rheological and mechanical properties of WMA reach the same level as HMA.

Water

Soil’s consolidation is a geotechnical problem resulting from a stress-transfer process that init... more Soil’s consolidation is a geotechnical problem resulting from a stress-transfer process that initiates when the load is applied to the water contained in the soil, producing a reduction in pore water pressure and rearranging the solid particles, and thus causing a decrease in soil volume. Therefore, consolidation is a coupled flow–mechanical problem. Coupled models have been developed to simulate this phenomenon while considering different theories, providing consistent results. This paper presents an elastoplastic coupled model of consolidation under Terzaghi’s effective stress formulated using the equations of transient flow, balance moment, motion, and the critical state model that considered elastoplastic strains. The coupled model algorithm provided fast and easy results due to its flexibility, as it allowed combinations in loading and boundary conditions. Additionally, it considered the external/internal water flow as an inflow or outflow, which modified the pore water pressur...

Scientific Reports

this research presents an analysis of the frequencies and vibration modes of the structure of the... more this research presents an analysis of the frequencies and vibration modes of the structure of the superficial seiches of Lake Chapala using mathematical modelling and measurements. The HAMSOM model was run with wind fields from coastal meteorological stations and for different lake storage levels. The lake water level measurements were carried out in two campaigns in 2003. An analysis of the surface seiches in the lake was performed using the fast Fourier transform method. A spectral analysis of lake water level measurements reveals seiches with periods close to 5.9, 3, 2, and 1.5 h. A comparison with the periods calculated by the HAMSOM model indicates that these periods correspond to superficial seiches of the fundamental longitudinal mode of the lake and the subsequent three modes. The lake has undergone important changes in its storage level over time. Therefore, we modelled it with storage levels from the isobaths 90 to 95 m and found that surface seiche periods decreased to 5.2 h.

Ra Ximhai

En este estudio se realizó la simulación de corrientes generadas por el viento en la Bahía de Che... more En este estudio se realizó la simulación de corrientes generadas por el viento en la Bahía de Chetumal, Quintana Roo mediante el uso de un modelo estacionario de aguas someras. Se utilizó un viento climático homogéneo para t oda la bahía, con una velocidad de 3m·s - 1 , y con las direcciones Norte, Sur, Noreste, Noroeste, Este, Sureste, Suroeste y Oeste. Los resultados muestran una dinámica bastante compleja en la bahía de Chetumal, observándose circulación fuertemente asociada a los cambios batimétricos, principalmente en las zonas profundas donde se encuentran las pozas, con velocidades que alcanzan hasta los 13 cm·s - 1 .

Ra Ximhai

El presente estudio tiene el objetivo de describir desde una perspectiva cualitativa, la situació... more El presente estudio tiene el objetivo de describir desde una perspectiva cualitativa, la situación actual de las microempresas de la zona de Arandas, Jalisco, en las dimensiones administrativas, gestión y planeación de recursos; con la intención de identificar oportunidades de mejora que permitan la continuidad y la profesionalización de las mismas, además se expone cómo la mejora continua, alineada con la innovación amplía la perspectiva de la organización. La innovación parte de una necesidad de solucionar un problema y es necesario el conocimiento y la experiencia del individuo para resolverlo, si se incluye dentro de la cultura organizacional, la coexistencia controlada de la Mejora Continua y de la Innovación, se garantiza el camino a la competitividad y por supuesto, al logro de los objetivos. La importancia de lo anterior en las microempresas radica en la cantidad de establecimientos de este tipo que existen, ya que han proporcionado una de las mejores alternativas para la in...

Materials

In most cases, stone mastic asphalt (SMA) mixtures placed in thin layers and subjected to stress ... more In most cases, stone mastic asphalt (SMA) mixtures placed in thin layers and subjected to stress develop early cracks (potentially resulting from being improperly affixed to the underlying layer, placed over previously cracked asphalt pavement, or placed over Portland cement concrete slabs). However, the filler used in SMA production is very influential on the performance of the mix. Fillers used in this type of mixture have a low plastic index or are inert (calcium carbonate or lime), so it is important to understand the effect of each material on the possible fissuring and cracking process of the SMA mixture. The objective of this study is to present an evaluation of the behavior of SMA asphalt mixtures with different types of filler and at different temperatures using the semicircular bend (SCB) fracture energy test. This research compares results between fracture energy and different types of filler in SMA asphalt mixtures at temperatures ranging from −10 to 25 °C.

Lake Sciences and Climate Change, 2016

Measurements of temperature, currents and lake level taken in 2005-2014 are analyzed and discusse... more Measurements of temperature, currents and lake level taken in 2005-2014 are analyzed and discussed. We obtained a conceptually new data set on the formation of the thermocline in Lake Chapala. It is showed that the thermocline in the lake occurs only during the daytime, in the top 0.5-1.0-m layer of the water column, whereby the vertical temperature gradient reaches 2.5°C/m within that layer. At night, the top layer is cooled, which causes strong vertical mixing down to the bottom. Moored measurements of temperature and level from Lake Chapala reveal the presence of seiches oscillations with periods of 5.7 and 2.8 hours with amplitudes of 15.4 and 8.1 mm. Temperature measurements on sections across the lake showed that in the northern part of the lake, the water column is warmer that in southern 2-3°C in all seasons. The lake currents were simulated for wet and dry seasons. The model results are in good agreement with the acoustic Doppler current profiler (ADCP) data. The presence of an anticyclone gyre in the central part of the lake in both seasons is detected.

Journal of Limnology, 2016

This study analyzed and discussed the instrumental measurements of temperature and currents made ... more This study analyzed and discussed the instrumental measurements of temperature and currents made on January 10, 2007, in Lake Chapala. We received new data on the formation of the thermocline. It is shown that the thermocline of the lake is formed only in the daytime and in a top-heated 0.5-1.0 m layer. The vertical temperature gradient reaches 2.5°C in the first meter, and the spatial average temperature across the lake showed that the northern end of the lake is, on average, 1°C warmer than the southern end. We numerically modeled the currents in the lake for the dry season using the HAMSOM 2D hydrodynamic model. The simulation results are in good agreement with the acoustic Doppler current profiler ADCP measurements. In the dry season, two gyres were found: a cyclonic gyre in the eastern part and an anticyclonic gyre in the western part.

Applied Sciences

A poor bond between the layers constituting an asphalt pavement can cause structural problems suc... more A poor bond between the layers constituting an asphalt pavement can cause structural problems such as slippage, delamination, and top-down cracking. These are consequences of the pavement being unable to act as a continuous element and to properly transmit the effects of the traffic to underlying layers. The aim of this research was to characterize an asphalt emulsion with low asphalt content using the Mexican standard and to evaluate its performance through the Laboratorio de Caminos de Barcelona (LCB) shear testing. Cationic slow setting (SS) and cationic rapid setting (RS) asphalt emulsions were tested by varying the asphalt contents, dosages, and cure times. The slow set emulsions presented a greater fracture energy than did the rapid set emulsions; a dose of 0.3 L/m2 provided the same level of resistance as a 0.5 L/m2 dose; and a 55% asphalt content provided greater resistance than the 60% asphalt content.

E-Gnosis ( …, 2006

The characteristics of internal waves in Bahía de Banderas were determined by means of oscillatin... more The characteristics of internal waves in Bahía de Banderas were determined by means of oscillating CTD casts from a fast oceanographic survey done on April 24 and 2001. Previous studies have shown that the continental shelf of the Mexican Pacific, including Bahía de Banderas, possesses favorable conditions for the generation on internal waves. Fluctuations of the hydrophysical characteristics of the continental shelf caused by the presence and propagation of internal waves are smoothed using a filter whose parameters are determined by the shape of the spatial correlation function of the field pulses relative to the analyzed characteristic. Once internal waves are filtered, temperature, salinity and geostrophic velocity fields are shown for different depths and the general pattern of the geostrophic circulation in the bay is discussed. The strongest currents were present south of Islas Marietas and at the east zone of the bay. It can be stated that the geostrophic circulation in the bay in spring has an important role in the water masses exchange between the zone close to the east coast, inside the bay, and the open ocean.

Materials

Mode I fracture (tensile type) is the common cracking mode of asphalt pavements, which is caused ... more Mode I fracture (tensile type) is the common cracking mode of asphalt pavements, which is caused by thermal cyclic loading or traffic. Some studies allow the analysis of the fracture modes by means of standardized tests, some of which are limited, difficult, with little repeatability or do not generate an adequate tension state. In this paper, mode I fracture toughness of asphalt mixtures with symmetric geometry specimens at intermediate temperature is evaluated. Experimental results from direct tension test and simulations on asphalt mix specimens subjected to intermediate temperatures of 10, 20 and 30 °C, mode I load rates (0.5, 1 and 2 mm/min) and notches (2 and 3 cm) were compared to find the variables that reflect the operating conditions of the asphalt mix. Results showed that shear stresses are 8.12% lower in the simulations with respect to the tests, while the load-deformation curves show 30% and 35% variation, where the temperature of 20 °C, the notch of 2 cm and the loadin...

Materials, 2022

Reclaimed asphalt pavements (RAP) provide economic and environmental benefits. In recent decades,... more Reclaimed asphalt pavements (RAP) provide economic and environmental benefits. In recent decades, their use has increased, but rheological properties are affected by RAP aging, increasing stiffness, cracking, and susceptibility to water. To counteract these effects, rejuvenating agents are used, but they must be properly dosed to design quality mixtures. Therefore, different binders were analyzed, including virgin binder (VBB), binder modified by SBS polymer (MB), AC-RAP, binder softened using a rejuvenating agent, and binders softened with doses (15%, 30%, and 45%) of AC-RAP. The rheological properties were evaluated by dynamic shear rheometry (DSR) and beam-bending rheometry (BBR) tests, while the linear amplitude sweep (LAS) test was used to measure fatigue cracking and the multiple stress creep recovery (MSCR) test was used to measure rutting. A mixing chart was constructed based on a high temperature AC-RAP to satisfy the performance grade (PG 76-22). The results showed that so...

Ra Ximhai, 2017

In this study performed the simulation of currents generated by the wind on the Bay of Chetumal, ... more In this study performed the simulation of currents generated by the wind on the Bay of Chetumal, Quintana Roo through the use of a stationary shallow-water model. A homogeneous climatic wind was used for the entire Bay, with a velocity of 3m·s-1 , and directions North, South, Northeast, Northwest, East, Southeast, Southwest and West. The results showed a rather complex dynamics in Chetumal Bay, in which important turns were observed in deep areas, with speeds reaching up to 13 cm·s-1 .

Geofísica Internacional, 2016

Measurements of temperature, currents and lake level taken in 2005-2014 are analyzed and discusse... more Measurements of temperature, currents and lake level taken in 2005-2014 are analyzed and discussed. Moored measurements of temperature and level in the northern part of the lake reveal the presence of seiches oscillations of the first and second modes, with periods of 5.7 and 2.8 hours, and amplitudes of 15.4 and 2.1 mm. In 2006 four temperature cross-sections were carried out in the study area. The obtained data reveal that in all four seasons of the year the temperatures averaged over the north and south coastal areas differ by 2-3°C. The lake currents were simulated using the HAMSOM 2-D hydrodynamic model both for wet and dry seasons. The model results are in good agreement with the ADCP data. The presence of an anticyclonic gyre, 10-12 km in diameter, in the central part of the lake in both seasons is revealed. In particular, the summer 2014 data provide evidence of the gyre and its impact on the spatial distribution of temperature in the lake.

Ra Ximhai, 2017

Se analizan series de tiempo de variables meteorológicas obtenidas por reanálisis, en diferentes ... more Se analizan series de tiempo de variables meteorológicas obtenidas por reanálisis, en diferentes zonas de la costa mexicana del Océano Pacífico y se comparan la climatología con las variabilidades interanuales, donde se establece que la mayor variabilidad interanual está asociada a El Niño - Oscilación del Sur.

Construction and Building Materials, 2019

The densification through SGC reduces the compaction temperature of WMA. Adding 1.5 and 3% of gre... more The densification through SGC reduces the compaction temperature of WMA. Adding 1.5 and 3% of greasy diamide (additive) reduces the compaction temperature. Additive reduces the phase angle and increase the dynamic shear rheological modulus. Greasy diamide added up to 3% improved the viscosity and the lubricity of the WMA. The rheological and mechanical properties of WMA reach the same level as HMA.

Water

Soil’s consolidation is a geotechnical problem resulting from a stress-transfer process that init... more Soil’s consolidation is a geotechnical problem resulting from a stress-transfer process that initiates when the load is applied to the water contained in the soil, producing a reduction in pore water pressure and rearranging the solid particles, and thus causing a decrease in soil volume. Therefore, consolidation is a coupled flow–mechanical problem. Coupled models have been developed to simulate this phenomenon while considering different theories, providing consistent results. This paper presents an elastoplastic coupled model of consolidation under Terzaghi’s effective stress formulated using the equations of transient flow, balance moment, motion, and the critical state model that considered elastoplastic strains. The coupled model algorithm provided fast and easy results due to its flexibility, as it allowed combinations in loading and boundary conditions. Additionally, it considered the external/internal water flow as an inflow or outflow, which modified the pore water pressur...

Scientific Reports

this research presents an analysis of the frequencies and vibration modes of the structure of the... more this research presents an analysis of the frequencies and vibration modes of the structure of the superficial seiches of Lake Chapala using mathematical modelling and measurements. The HAMSOM model was run with wind fields from coastal meteorological stations and for different lake storage levels. The lake water level measurements were carried out in two campaigns in 2003. An analysis of the surface seiches in the lake was performed using the fast Fourier transform method. A spectral analysis of lake water level measurements reveals seiches with periods close to 5.9, 3, 2, and 1.5 h. A comparison with the periods calculated by the HAMSOM model indicates that these periods correspond to superficial seiches of the fundamental longitudinal mode of the lake and the subsequent three modes. The lake has undergone important changes in its storage level over time. Therefore, we modelled it with storage levels from the isobaths 90 to 95 m and found that surface seiche periods decreased to 5.2 h.

Ra Ximhai

En este estudio se realizó la simulación de corrientes generadas por el viento en la Bahía de Che... more En este estudio se realizó la simulación de corrientes generadas por el viento en la Bahía de Chetumal, Quintana Roo mediante el uso de un modelo estacionario de aguas someras. Se utilizó un viento climático homogéneo para t oda la bahía, con una velocidad de 3m·s - 1 , y con las direcciones Norte, Sur, Noreste, Noroeste, Este, Sureste, Suroeste y Oeste. Los resultados muestran una dinámica bastante compleja en la bahía de Chetumal, observándose circulación fuertemente asociada a los cambios batimétricos, principalmente en las zonas profundas donde se encuentran las pozas, con velocidades que alcanzan hasta los 13 cm·s - 1 .

Ra Ximhai

El presente estudio tiene el objetivo de describir desde una perspectiva cualitativa, la situació... more El presente estudio tiene el objetivo de describir desde una perspectiva cualitativa, la situación actual de las microempresas de la zona de Arandas, Jalisco, en las dimensiones administrativas, gestión y planeación de recursos; con la intención de identificar oportunidades de mejora que permitan la continuidad y la profesionalización de las mismas, además se expone cómo la mejora continua, alineada con la innovación amplía la perspectiva de la organización. La innovación parte de una necesidad de solucionar un problema y es necesario el conocimiento y la experiencia del individuo para resolverlo, si se incluye dentro de la cultura organizacional, la coexistencia controlada de la Mejora Continua y de la Innovación, se garantiza el camino a la competitividad y por supuesto, al logro de los objetivos. La importancia de lo anterior en las microempresas radica en la cantidad de establecimientos de este tipo que existen, ya que han proporcionado una de las mejores alternativas para la in...

Materials

In most cases, stone mastic asphalt (SMA) mixtures placed in thin layers and subjected to stress ... more In most cases, stone mastic asphalt (SMA) mixtures placed in thin layers and subjected to stress develop early cracks (potentially resulting from being improperly affixed to the underlying layer, placed over previously cracked asphalt pavement, or placed over Portland cement concrete slabs). However, the filler used in SMA production is very influential on the performance of the mix. Fillers used in this type of mixture have a low plastic index or are inert (calcium carbonate or lime), so it is important to understand the effect of each material on the possible fissuring and cracking process of the SMA mixture. The objective of this study is to present an evaluation of the behavior of SMA asphalt mixtures with different types of filler and at different temperatures using the semicircular bend (SCB) fracture energy test. This research compares results between fracture energy and different types of filler in SMA asphalt mixtures at temperatures ranging from −10 to 25 °C.

Lake Sciences and Climate Change, 2016

Measurements of temperature, currents and lake level taken in 2005-2014 are analyzed and discusse... more Measurements of temperature, currents and lake level taken in 2005-2014 are analyzed and discussed. We obtained a conceptually new data set on the formation of the thermocline in Lake Chapala. It is showed that the thermocline in the lake occurs only during the daytime, in the top 0.5-1.0-m layer of the water column, whereby the vertical temperature gradient reaches 2.5°C/m within that layer. At night, the top layer is cooled, which causes strong vertical mixing down to the bottom. Moored measurements of temperature and level from Lake Chapala reveal the presence of seiches oscillations with periods of 5.7 and 2.8 hours with amplitudes of 15.4 and 8.1 mm. Temperature measurements on sections across the lake showed that in the northern part of the lake, the water column is warmer that in southern 2-3°C in all seasons. The lake currents were simulated for wet and dry seasons. The model results are in good agreement with the acoustic Doppler current profiler (ADCP) data. The presence of an anticyclone gyre in the central part of the lake in both seasons is detected.

Journal of Limnology, 2016

This study analyzed and discussed the instrumental measurements of temperature and currents made ... more This study analyzed and discussed the instrumental measurements of temperature and currents made on January 10, 2007, in Lake Chapala. We received new data on the formation of the thermocline. It is shown that the thermocline of the lake is formed only in the daytime and in a top-heated 0.5-1.0 m layer. The vertical temperature gradient reaches 2.5°C in the first meter, and the spatial average temperature across the lake showed that the northern end of the lake is, on average, 1°C warmer than the southern end. We numerically modeled the currents in the lake for the dry season using the HAMSOM 2D hydrodynamic model. The simulation results are in good agreement with the acoustic Doppler current profiler ADCP measurements. In the dry season, two gyres were found: a cyclonic gyre in the eastern part and an anticyclonic gyre in the western part.

Applied Sciences

A poor bond between the layers constituting an asphalt pavement can cause structural problems suc... more A poor bond between the layers constituting an asphalt pavement can cause structural problems such as slippage, delamination, and top-down cracking. These are consequences of the pavement being unable to act as a continuous element and to properly transmit the effects of the traffic to underlying layers. The aim of this research was to characterize an asphalt emulsion with low asphalt content using the Mexican standard and to evaluate its performance through the Laboratorio de Caminos de Barcelona (LCB) shear testing. Cationic slow setting (SS) and cationic rapid setting (RS) asphalt emulsions were tested by varying the asphalt contents, dosages, and cure times. The slow set emulsions presented a greater fracture energy than did the rapid set emulsions; a dose of 0.3 L/m2 provided the same level of resistance as a 0.5 L/m2 dose; and a 55% asphalt content provided greater resistance than the 60% asphalt content.

E-Gnosis ( …, 2006

The characteristics of internal waves in Bahía de Banderas were determined by means of oscillatin... more The characteristics of internal waves in Bahía de Banderas were determined by means of oscillating CTD casts from a fast oceanographic survey done on April 24 and 2001. Previous studies have shown that the continental shelf of the Mexican Pacific, including Bahía de Banderas, possesses favorable conditions for the generation on internal waves. Fluctuations of the hydrophysical characteristics of the continental shelf caused by the presence and propagation of internal waves are smoothed using a filter whose parameters are determined by the shape of the spatial correlation function of the field pulses relative to the analyzed characteristic. Once internal waves are filtered, temperature, salinity and geostrophic velocity fields are shown for different depths and the general pattern of the geostrophic circulation in the bay is discussed. The strongest currents were present south of Islas Marietas and at the east zone of the bay. It can be stated that the geostrophic circulation in the bay in spring has an important role in the water masses exchange between the zone close to the east coast, inside the bay, and the open ocean.