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They are investigating the use of volcanic ash from the La Palma volcano to make cement and concrete

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A team from the Polytechnic University of Valencia (UPV), part of the Institute of Concrete Science and Technology (Icitech), is studying various samples of volcanic ash from the Cumbre Vieja volcano on the island of La Palma to assess their potential use in the manufacture of cement and Concrete.

The results obtained so far show that volcanic ash is sufficiently reactive to be used in the manufacture of admixed cements (Type II) or pozzolan cements (Type IV). Likewise, the ashes show good homogeneity considering the different origins of the samples collected.

“So far we have carried out physical, chemical, mineralogical and mechanical tests and the results show that this volcanic ash meets the regulatory requirements for its use as a mineral additive in cement,” says Jordi Payá in a statement from the Icitech Institute’s Building Materials Chemistry Research Group (Giquima). the Politecnica de Valencia.

In addition to Jordi Payá, María Victoria Borrachero, Lourdes Soriano and José Monzó, researchers from the Icitech Institute, participate in the project; Mauro Tashima, hired at the Polytechnic University of Valencia on a Maria Zambrano grant funded by the Ministry of Universities with funds from the European Union’s Next Generation Funds; and Stanislav Barashkin, student of the official master’s degree in concrete engineering at the UPV.

Volcanic ash hundreds or thousands of years old has usually been studied, but in this case it is ash that was recently emitted, making it unique. On the other hand, each volcanic emission produces ash with different properties, which is why it is necessary to study each case specifically, according to the Icitech team.

“This volcanic ash should be considered as a natural residue, since it is a material that has occupied or occupies spaces corresponding to infrastructures, industries, communication routes, fields and houses, so it is important to be able to carry out these studies reusing this material “, adds Mª Victoria Borrachero.

In this sense, Lourdes Soriano points out that in order to recover part of the social and economic activity and, moreover, to protect the environment, a recovery is necessary that implies the use of several million tons that may be available this ash. .


“And given the initial results of our study, cement-based materials are a good alternative to deal with this large amount of waste. For this reason, this project is another example of the societal impact of research in this case, our UPV contribution to the island’s recovery strategies,” adds Lourdes Soriano.

Therefore, the main objective of the Giquima-Icitech team of the Universitat Politècnica de València is to give value to this ash in the field of construction, through collection, management, conditioning and application by a cement or construction company. . “Now we are already analyzing projects in which the results obtained from the research can be applied,” adds José Monzó.

The development of this study was possible thanks to the collaboration of the Presidium of the Government of the Canary Islands, the Military Emergency Unit (UME) and the General Directorate for the Coordination of Actions of the Government of the Generalitat Valenciana.

The Giquima-Icitech team from Universitat Politècnica de Valencia will present the results of the project at the next National Congress on Materials, taking place from June 28th to July 1st in Ciudad Real.

Looking to the future, it will focus its work on evaluating the behavior of these cements over the longer term – one year – and on optimizing the dosage in the composition of the new cements with ash from Cumbre Vieja.


Source europapress.es

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