Miguel A. Franesqui

Universidad de Las Palmas de Gran Canaria | ULPGC · Department of Civil Engineering

Low-energy asphalt techniques, such as warm mix asphalt (WMA), combined with the rational consumption of geomaterials and waste recycling would promote more sustainable and energy-efficient asphalt pavements. In volcanic environments, a significant proportion of aggregate production is discarded due to its extreme porosity, and used tires generate...

The reuse of plastic and poor-quality residual aggregates in the manufacture of bituminous mixtures for paving could contribute to reclaim significant quantities in the pavement construction industry since certain polymers can enhance the mixture properties. This study investigates the potential use of waste from recycled polyethylene terephthalate...

The reuse of waste materials and residual aggregates as well as the reduction of emissions has become vitally important for the environment, the economy and logistics of the asphalt paving industry. This study characterizes the performance and production properties of asphalt mixtures with waste crumb-rubber modifier from scrap tires, a warm mix as...

In volcanic regions, the use of certain abundant aggregates of scoriaceous nature with high porosity to manufacture bituminous paving mixtures is a major problem due to the excessive heterogeneity, absorption and limited strength of these aggregates. Consequently, the properties of the mixtures often do not meet technical specifications. The aim of...

Adequate monitoring and timely treatment of partial-depth, surface-initiated cracks are essential in order to prolong the life cycle of pavement structures. Therefore, methodologies to precisely identify and assess the progression of top-down cracking (TDC) depth are fundamental. For this purpose, a calibrated model for ultrasound inspection of var...

Rockfalls on transport infrastructures are a serious hazard to users and many resources are invested in rock slope maintenance, stabilization, and protective measures. In volcanic territories, the risk of rock instabilities and rockfalls is very high due to the rugged natural slopes and origin of rock masses. With the aim of determining the influen...

In volcanic terrains and in particular island regions, the aggregates come from the mechanical crushing of lava rocks and pyroclastic deposits. This study offers an experimental database of the geomechanical characteristics of different volcanic rock lithotypes and the aggregates obtained from these rocks. For this purpose, 971 aggregate samples an...

Surface-initiated cracking with top-down propagation (TDC) is one of the most frequent and important failure modes of asphalt pavements. In order to achieve long-lasting pavements, it is necessary to control the evolution of these cracks and so repair them before they become deeper and deteriorate the lower layers. Self-healing of asphalt mixtures...

The main volumetric and engineering characteristics of hot mix asphalt with crumb rubber modified bitumen from used tyres and high-porosity volcanic aggregates are presented and compared to the same mixtures with conventional bitumen. In volcanic territories, these marginal aggregates are the most common lithotypes and environmental protection cond...

This study presents the results of the principal engineering properties of asphalt-rubber warm mixtures (AR-WMA) with waste crumb rubber from used tyres and highly-vesiculated basalt of scoriaceous nature, also considered a residual or marginal aggregate according to standard specifications. The temperature reduction was carried out using a liquid...

This article outlines the ultrasound data employed to calibrate in the laboratory an analytical model that permits the calculation of the depth of partial-depth surface-initiated cracks on bituminous pavements using this non-destructive technique. This initial calibration is required so that the model provides sufficient precision during practical...

Open image in new windowRockfalls on roadways are a serious hazard to users. Many resources are invested in rock slope maintenance and measures of stabilization and protection to mitigate the risk. Catchment areas (ditches) are one of the least expensive and most effective protective measures to contain and restrict rockfall onto roadways. While th...

Open image in new windowThe costs associated with rockfall risk are high. Many resources are invested in rock slope maintenance and stabilization, and protection measures to reduce rockfall hazards on transport infrastructures. However, few studies aim to evaluate the relative influence of the different factors (geometrical and material properties)...

Design of asphalt mixtures for paving by using volcanic porous aggregates, rubber from used tyres and plastic waste

Laboratory Test onVolcanic Rocks an Aggregates for students of civil engineering

Laboratory Tests on Bituminous Mixtures for sudents of civil engineering

Los áridos son uno de los materiales básicos más importantes de la industria de la construcción. Junto con el agua, constituye uno de los dos productos de mayor consumo per cápita en el mundo y una de las cuatro materias primas más importantes de la producción minera mundial después del petróleo, el gas y el carbón. Una de las peculiaridades de los...

I. Menéndez-Pidal; A. Lomoschitz; M.A. Franesqui; J.L. Jiménez; E. Sanz. Didactica en los anejos de Geologia y Geotecnia en los TFT de las titulaciones de Ingenieria Civil: bases metodológicas, Congreso Universitario de Innovacion educativa en las enseñanzas técnicas. Valencia. pp. 1 - 18. 2015.

A procedure for on-site identifying, monitoring and control of top-down propagated cracks in asphalt pavements is proposed, allowing precise and high-performance evaluation of the extent and depth of surface-initiated cracking by using ultrasonic techniques, and making it possible to apply this methods for pavement management systems. The methodolo...

The current work analyze 5 factors that define the stop distance of falling rocks: block shape (F ), block size (T), talus height (H ), talus slope (H:V) and ditch inclination (H:V). The principal goal is to determine the influence of each factor to improve the territory planning decisions. We conclude that the lithology is a significant factor of...

Design method of rockfall catchment areas to be used along linear infrastructures

Resumen: Los Trabajos Fin de Título (TFT) de las titulaciones de ingeniería civil, en su modalidad de "trabajos de carácter profesional directamente relacionados con los estudios cursados", deben incluir anejos específicos de Geología y Geotecnia, cuya elaboración resulta en ocasiones compleja para los estudiantes: 1º) por el tiempo transcurrido en...

The article presents a historical and documental study of traditional modes of transport in inland areas of the Canary island and theire volutionover the lasttwocenturies.These in landareas be ingcharacterised by their geographicisolation from continental road networks. The study consider the activity and organisation of land transport in acordance...

An experimental research study to verify the application of the "Equiviscous Temperature" (EVT) concept, related to a defined "Low Shear Viscosity" (LSV), as an indicator for the rutting susceptibility of bitumen is presented in this paper. New paving performance-related characterisation methodologies using dynamic shear tests in low frecuency osci...

An experimental research study to verify the application of the "Equiviscous Temperature" (EVT) concept, related to a defined "Low Shear Viscosity" (LSV), as an indicator for the rutting susceptibility of bitumen is presented in this paper. New paving performance-related characterisation methodologies using dynamic shear tests in low frecuency osci...

The article presents a historical documentary research work, supplemented by field work and technical analysis, on traditional road engineering in insular territory isolated from continental road networks. The work studies the organization of the road network and its evolution, typology and construction techniques, tools and traditional materials,...

The article presents a historical documentary research work, supplemented by field work and technical analysis, on traditional road engineering in insular territory isolated from continental road networks. The work studies the organization of the road network and its evolution, typology and construction techniques, tools and traditional materials,...

An economical and environmentally-friendly solution to stabilize jointed vertical rock slopes in works of improvement and cross section widening of a part of the GC-503 local road in Gran Canaria Island (Spain) is presented in this paper. Due to the montainous relief of this territory, this road cross over a extremely narrow section between two dee...

The mountainous and remote Canary archipelago is a highly fragmented territory and this had been further accentuated by the process of urban development towards rural areas (largely protected natural areas) as a result of increasing levels of motor transport. Future guidelines, including European guidelines, point towards the development of sustain...

The mountainous and remote Canary archipelago is a highly fragmented territory and this had been further accentuated by the process of urban development towards rural areas (largely protected natural areas) as a result of increasing levels of motor transport. Future guidelines, including European guidelines, point towards the development of sustain...