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Sustainable acoustic insulation for prefabricated concrete homes in Andean zones

Paredes Marcel, Lopez Fausto, Castillo Tito, Andrade Alexis, Arroba Valeria

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

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2021

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Vol. 30, No. 3

496--508

EN

The construction sector is undoubtedly one of the main promoters for economic and social development. The modern concept of the prefabrication of elements originated from the industrial revolution to reduce costs and increase production through the mechanization of work, increasing the quality and ease of control in the plant. Prefabricated concrete homes are aimed at the popular sectors, however, when talking about acoustic habitability comfort we refer to constructive solutions used in a building to minimize the transmission of sounds (noise pollution) from outside or from an adjoining enclosure. This is achieved with the use of acoustic insulation materials. In the present research, through a bibliographic review, the updated state-of-the-art search methodology is developed, supported by the Delphi and AHP (hierarchical analytical process) methods and with the opinion of experts to compare the properties of acoustic insulating materials; in order to publicize the best acoustic insulators to be installed inside prefabricated concrete homes. Within the bibliographic review, new technologies with sustainable materials found as feasible prototypes were investigated in Ecuador, where thanks to its diversity of ecosystems and the necessary existing technology, the natural fibers used in the prototypes for insulation/absorption are easily found acoustics in homes.

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Mortar for 3D printers using river sand, Portland cement and hydraulic lime

Palacios Javier, Paredes Marcel, Castillo Tito, Paredes Oscar

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

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2020

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Vol. 29, No. 4

399--408

EN

The 3D printing is a construction technology that uses mortar to make elements and structures. In this research, four types of mortar were elaborated using Portland cement types I and HE, adding hydraulic lime. Mortars with cement types I and HE without hydraulic lime presented higher resistance to compression than mortars made with lime. The four mortars had an adequate resistance to compression and features that are suitable for use in 3D printers.

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Microplastics in the drinking water of the Riobamba city, Ecuador

Paredes Marcel, Castillo Tito, Viteri Rafaela, Fuentes Gabriela, Bodero Elba

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

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2019

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Vol. 28, No. 4

653--663

EN

The city of Riobamba captures for human consumption groundwater from melting glaciers, from seven wells in the foothills of the Chimborazo volcano. The objective is determine the percentage of existing microplastics in drinking water distribution system. Sixty two samples were collected, analysed with a cellulose filter and Nile red dye. Then observed in a stereoscope, obtaining presence in 12 samples of the 62 analysed. The results of the analysis show that there is a 19% presence of microplastics.