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

54 shared publications

Civil Engineering Department, University of Alicante, 03690 Sant Vicent del Raspeig, Alicante, Spain

Isidro Sánchez

36 shared publications

Departamento de Ingeniería Civil, Universidad de Alicante, Ap. Correos 99, 03080 Alacant/Alicante, Spain

Antonio José Tenza-Abril

20 shared publications

Departamento de Ingeniería Civil, Universidad de Alicante, Ap. Correos 99, 03080 Alacant/Alicante, Spain

Javier Sánchez

18 shared publications

Universitat d’Alacant (SPAIN)

Marta Cabeza

18 shared publications

Grupo ENCOMAT, Escola de Enxeñaría Industrial, Universidade de Vigo, Campus Universitario, 36310 Vigo, Spain

25
Publications
39
Reads
7
Downloads
51
Citations
Publication Record
Distribution of Articles published per year 
(2009 - 2019)
Total number of journals
published in
 
12
 
Publications See all
Article 0 Reads 0 Citations Effects of Red Mud Addition in the Microstructure, Durability and Mechanical Performance of Cement Mortars José Marcos Ortega, Marta Cabeza, Antonio José Tenza-Abril, ... Published: 08 March 2019
Applied Sciences, doi: 10.3390/app9050984
DOI See at publisher website ABS Show/hide abstract
Recently, there has been a great effort to incorporate industrial waste into cement-based materials to reach a more sustainable cement industry. In this regard, the Bayer process of obtaining alumina from bauxite generates huge amounts of waste called red mud. Few research articles have pointed out the possibility that red mud has pozzolanic activity. In view of that, the objective of this research is to analyse the short-term effects in the pore structure, mechanical performance and durability of mortars which incorporate up to 20% of red mud as a clinker replacement. As a reference, ordinary Portland cement and fly ash Portland cement mortars were also studied. The microstructure was characterised through mercury intrusion porosimetry and non-destructive impedance spectroscopy, which has not previously been used for studying the pore network evolution of red mud cement-based materials. The possible pozzolanic activity of red mud has been checked using differential scanning calorimetry. The non-steady state chloride migration coefficient and the mechanical properties were studied too. According to the results obtained, the addition of red mud entailed a greater microstructure refinement of the mortar, did not worsen the resistance against chloride ingress and reduced the compressive strength compared to control binders.
Article 1 Read 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 1 Citation Long-term effects of waste brick powder addition in the microstructure and service properties of mortars José Marcos Ortega, Viviana Letelier, Carlos Solas, Giacomo ... Published: 01 September 2018
Construction and Building Materials, doi: 10.1016/j.conbuildmat.2018.06.161
DOI See at publisher website
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 2 Citations Short-Term Performance of Sustainable Silica Fume Mortars Exposed to Sulfate Attack José Marcos Ortega, María Dolores Esteban, Mark Williams, Is... Published: 18 July 2018
Sustainability, doi: 10.3390/su10072517
DOI See at publisher website ABS Show/hide abstract
Nowadays, the reuse of wastes is essential in order to reach a more sustainable environment. The cement production results in CO2 emissions which significantly contribute to anthropogenic greenhouse gas emissions. One way to reduce them is by partially replacing clinker by additions, such as silica fumes or other wastes. On the other hand, the pore structure of cementitious materials has a direct influence on their service properties. One of the most popular techniques for characterizing the microstructure of those materials is mercury intrusion porosimetry. In this work, this technique has been used for studying the evolution of the pore network of mortars with different percentages of silica fume (until 10%), which were exposed to aggressive sodium and magnesium sulfate solutions up to 90 days. Between the results of this technique, intrusion-extrusion curves and logarithms of differential intrusion volume versus pore size curves were studied. This characterization of the pore network of mortars has been complemented with the study of their compressive strength and their steady-state ionic diffusion coefficient obtained from samples’ resistivity. Generally, silica fume mortars showed different performance depending on the aggressive condition, although the greatest deleterious effects were observed in the medium with presence of both magnesium and sodium sulfates.
CONFERENCE-ARTICLE 33 Reads 0 Citations <strong>Effects of Silica Fume on the Pore Structure and Properties of Mortars Exposed to Sulphate Aggressive Media</str... José Marcos Ortega, María Dolores Esteban, Mark Williams, Is... Published: 17 May 2018
Proceedings of The 3rd International Electronic Conference on Materials Sciences, doi: 10.3390/ecms2018-05231
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The use of additions as clinker replacement has become very popular, due to the advantages that they provide, especially regarding the improvement of cement industry sustainability. The microstructure of cement-based materials has a direct influence on their service properties. In this research, mortars with different contents of silica fume (up to 10%) have been studied. These mortars were exposed to aggressive media with presence of sodium and magnesium sulphate along 90 days. On one hand, the evolution of their pore structure was characterised using different results provided by mercury intrusion porosimetry technique, such as intrusion-extrusion curves and logarithm of differential intrusion volume versus pore size curves. On the other hand, the compressive strength and the steady-state ionic diffusion coefficient obtained from resistivity of the samples, which was measured using impedance spectroscopy, were also studied. In general, silica fume mortars showed good performance, although the greatest deterioration of these mortars was observed in a mixed magnesium and sodium sulphate solution.

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