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José Marcos Ortega     University Lecturer 
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José Marcos Ortega published an article in January 2019.
Research Keywords & Expertise
0 A
0 Clio
0 Impedance Spectroscopy
0 Laser
0 Microstructure
Top co-authors See all
Miguel-Ángel Climent

47 shared publications

University of Alicante

Isidro Sánchez

23 shared publications

University of Alicante

Javier Sanchez

17 shared publications

Universitat d’Alacant (SPAIN)

Antonio José Tenza-Abril

16 shared publications

Department of Civil Engineering, University of Alicante, 03690 Alicante, Spain

Marta Cabeza

16 shared publications

University of Vigo; EEI; Campus Universitario Lagoas Marcosende; 36310 Vigo Pontevedra Spain

16
Publications
7
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39
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Publication Record
Distribution of Articles published per year 
(2009 - 2019)
Total number of journals
published in
 
11
 
Publications See all
Article 0 Reads 0 Citations Effects of Using Mine Tailings from La Unión (Spain) in Hot Bituminous Mixes Design Antonio José Tenza-Abril, José Miguel Saval, Victoria Eugeni... Published: 14 January 2019
Applied Sciences, doi: 10.3390/app9020272
DOI See at publisher website ABS Show/hide abstract
Currently, political policies aimed at curbing the abuse of natural resources have given rise to a conscientiousness leading to the reevaluation of wastes. Wastes generated from previous mining operations greatly impact the environment, often leaving a legacy of elevated concentrations of heavy metals in the surrounding soil and water. In this study, two types of waste from the mining district of La Union (Spain) were used to study their use as a component of road wearing courses. The physical and mechanical characteristics were determined to identify the optimal content of bitumen, as well as the fatigue resistance using the four-point beam fatigue test, in all the mixtures manufactured. The mine tailings exhibited adequate physical and mechanical properties to be utilized as a coarse aggregate for a wearing course. The results indicate that one of the studied mine tailing forms could be used as a wearing course component, since it has properties similar to a control mix that is typically used in wearing course construction.
Article 0 Reads 2 Citations Mechanical Performance of Eco-Friendly Concretes with Volcanic Powder and Recycled Concrete Aggregates Viviana Letelier, José Marcos Ortega, Ester Tarela, Pedro Mu... Published: 27 August 2018
Sustainability, doi: 10.3390/su10093036
DOI See at publisher website ABS Show/hide abstract
At present, reducing the environmental impact of the construction industry is a major subject of study. In terms of the use of recycled concrete aggregates (RCA), most recently conducted studies have shown that the use of a limited percentage of those aggregates does not significantly affect the properties of concretes. This work analysed the mechanical properties of medium-strength concretes with a high contribution to sustainability, where cement and natural coarse aggregates (NCA) were partially replaced by volcanic powder (VP) and RCA, respectively. Three mixing ratios of VP replacement were tested in concretes without RCA and concretes with 30% RCA replacing NCA. Results show that when VP is used without RCA, up to 10% of the cement can be replaced by VP without a significant loss in the mechanical properties. When a combination of 5% VP and 30% RCA is used, the weakness of the recycled concrete is strengthened, obtaining stronger concretes than a control concrete with no recycled materials. Finally, the greenhouse gas assessment showed that the simultaneous incorporation of VP and RCA reduces CO2 emissions produced in the manufacture of concrete by up to 13.6%.
Article 0 Reads 0 Citations Skin friction coefficient change on cement grouts for micropiles due to sulfate attack José L. Pastor, J. Marcos Ortega, Miguel A. Climent, Isidro ... Published: 01 February 2018
Construction and Building Materials, doi: 10.1016/j.conbuildmat.2017.12.091
DOI See at publisher website
Article 1 Read 5 Citations Short-Term Behavior of Slag Concretes Exposed to a Real In Situ Mediterranean Climate Environment José Marcos Ortega, Isidro Sánchez, Marta Cabeza, Miguel Áng... Published: 08 August 2017
Materials, doi: 10.3390/ma10080915
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
At present, one of the most suitable ways to get a more sustainable cement industry is to reduce the CO2 emissions generated during cement production. In order to reach that goal, the use of ground granulated blast-furnace slag as clinker replacement is becoming increasingly popular. Although the effects of this addition in the properties of cementitious materials are influenced by their hardening conditions, there are not too many experimental studies in which slag concretes have been exposed to real in situ environments. Then, the main objective of this research is to study the short-term effects of exposure to real Mediterranean climate environment of an urban site, where the action of airborne chlorides from sea water and the presence of CO2 are combined, in the microstructure and service properties of a commercial slag cement concrete, compared to ordinary Portland cement (OPC). The microstructure was studied with mercury intrusion porosimetry. The effective porosity, capillary suction coefficient, chloride migration coefficient, carbonation front depth, and compressive strength were also analyzed. Considering the results obtained, slag concretes exposed to a real in situ Mediterranean climate environment show good service properties in the short-term (180 days), in comparison with OPC.
Article 3 Reads 8 Citations Influence of Silica Fume Addition in the Long-Term Performance of Sustainable Cement Grouts for Micropiles Exposed to a ... José Marcos Ortega, María Dolores Esteban, Raúl Rubén Rodríg... Published: 02 August 2017
Materials, doi: 10.3390/ma10080890
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
At present, sustainability is of major importance in the cement industry, and the use of additions such as silica fume as clinker replacement contributes towards that goal. Special foundations, and particularly micropiles, are one of the most suitable areas for the use of sustainable cements. The aim of this research is to analyse the effects in the very long-term (for 600 days) produced by sulphate attack in the microstructure of grouts for micropiles in which OPC (ordinary Portland cement) has been replaced by 5% and 10% silica fume. This line of study is building on a previous work, where these effects were studied in slag and fly ash grouts. Grouts made using a commercial sulphate-resisting Portland cement were also studied. The non-destructive impedance spectroscopy technique, mercury intrusion porosimetry, and Wenner resistivity testing were used. Mass variation and the compressive strength have also been analysed. Apparently, impedance spectroscopy is the most suitable technique for studying sulphate attack development. According to the results obtained, grouts for micropiles with a content of silica fume up to 10% and exposed to an aggressive sulphate medium, have a similar or even better behaviour in the very long-term, compared to grouts prepared using sulphate-resisting Portland cement.
Article 0 Reads 15 Citations Microstructural Effects of Sulphate Attack in Sustainable Grouts for Micropiles José Marcos Ortega Álvarez, María Esteban Pérez, Raúl Rodríg... Published: 08 November 2016
Materials, doi: 10.3390/ma9110905
DOI See at publisher website ABS Show/hide abstract
Nowadays, the use of micropiles has undergone a great development. In general, they are made with cement grout, reinforced with steel tubing. In Spain, these grouts are prepared using OPC, although the standards do not forbid the use of other cements, like sustainable ones. Micropiles are in contact with soils and groundwater, in which the presence of sulphates is common. Their deleterious effects firstly affect to the microstructure. Then, the aim of this research is to study the effects of sulphate attack in the microstructure of micropiles grouts, prepared with OPC, fly ash and slag commercial cements, compared to their behaviour when they are exposed to an optimum hardening condition. The microstructure evolution has been studied with the non-destructive impedance spectroscopy technique, which has never been used for detecting the effects of sulphate attack when slag and fly ash cements are used. Its results have been contrasted with mercury intrusion porosimetry and “Wenner” resistivity ones. The 28-day compressive strength of grouts has been also determined. The results of microstructure characterization techniques are in agreement, although impedance spectroscopy is the most sensitive for following the changes in the porous network of grouts. The results showed that micropiles made using fly ash and slag cements could have a good performance in contact with aggressive sodium sulphate media, even better than OPC ones.
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