Please login first
María Dolores Esteban  - - - 
Top co-authors
Miguel-Ángel Climent

47 shared publications

University of Alicante

Isidro Sánchez

23 shared publications

University of Alicante

José Marcos Ortega

16 shared publications

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

José Luis Pastor

3 shared publications

Department of Civil Engineering, University of Alicante, P.O. Box 99, E-03080 Alicante, Spain

5
Publications
0
Reads
0
Downloads
20
Citations
Publication Record
Distribution of Articles published per year 

Total number of journals
published in
 
3
 
Publications
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.
PROCEEDINGS-ARTICLE 25 Reads 0 Citations Effects of Silica Fume on the Pore Structure and Properties of Mortars Exposed to Sulphate Aggressive Media José Marcos Ortega, María Dolores Esteban, Mark Williams, Is... Published: 17 May 2018
The 3rd International Electronic Conference on Materials Sciences, doi: 10.3390/ecms2018-05231
DOI See at publisher website
Article 0 Reads 5 Citations Performance of Sustainable Fly Ash and Slag Cement Mortars Exposed to Simulated and Real In Situ Mediterranean Condition... José Marcos Ortega, María Dolores Esteban, Isidro Sánchez, M... Published: 31 October 2017
Materials, doi: 10.3390/ma10111254
DOI See at publisher website ABS Show/hide abstract
Nowadays, cement manufacture is one of the most polluting worldwide industrial sectors. In order to reduce its CO2 emissions, the clinker replacement by ground granulated blast–furnace slag and fly ash is becoming increasingly common. Both additions are well-studied when the hardening conditions of cementitious materials are optimum. Therefore, the main objective of this research was to study the short-term effects of exposure, to both laboratory simulated and real in situ Mediterranean climate environments, on the microstructure and durability-related properties of mortars made using commercial slag and fly ash cements, as well as ordinary Portland cement. The real in situ condition consisted of placing the samples at approximately 100 m away from the Mediterranean Sea. The microstructure was analysed using mercury intrusion porosimetry. The effective porosity, the capillary suction coefficient and the non-steady state chloride migration coefficient were also studied. In view of the results obtained, the non-optimum laboratory simulated Mediterranean environment was a good approach to the real in situ one. Finally, mortars prepared using sustainable cements with slag and fly ash exposed to both Mediterranean climate environments, showed adequate service properties in the short-term (90 days), similar to or even better than those in mortars made with ordinary Portland cement.
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 1 Read 12 Citations Long-Term Behaviour of Fly Ash and Slag Cement Grouts for Micropiles Exposed to a Sulphate Aggressive Medium José Marcos Ortega, María Dolores Esteban, Raúl Rubén Rodríg... Published: 30 May 2017
Materials, doi: 10.3390/ma10060598
DOI See at publisher website ABS Show/hide abstract
Nowadays, one of the most popular ways to get a more sustainable cement industry is using additions as cement replacement. However, there are many civil engineering applications in which the use of sustainable cements is not extended yet, such as special foundations, and particularly micropiles, even though the standards do not restrict the cement type to use. These elements are frequently exposed to the sulphates present in soils. The purpose of this research is to study the effects in the very long-term (until 600 days) of sulphate attack in the microstructure of micropiles grouts, prepared with ordinary Portland cement, fly ash and slag commercial cements, continuing a previous work, in which these effects were studied in the short-term. The microstructure changes have been analysed with the non-destructive impedance spectroscopy technique, mercury intrusion porosimetry and the “Wenner” resistivity test. The mass variation and the compressive strength have also been studied. The impedance spectroscopy has been the most sensitive technique for following the sulphate attack process. Considering the results obtained, micropiles grouts with slag and fly ash, exposed to an aggressive medium with high content of sulphates, have shown good behaviour in the very long-term (600 days) compared to grouts made with OPC.
Top