Publicomos

Notice (permalien)

Réf.

43300

Type

article

Titre

Effect of innovative bioproducts on air lime mortars

Langues

English

Auteurs

Oliveira, Alexandre / Pereira, Alice S. / Lemos, Paulo C. / Faria, Paulina / Silva, Vítor / Guerra, João P. L.

Maison d'édition

Elsevier

Date

2021

Addenda

Article n° 101985.

Titre de la revue

Journal of Building Engineering

Vol. & n°

v. 35

ISSN

2352-7102

Mots-clés

lime mortar / sustainability / air lime / building materials / analysis of materials / artificial ageing tests / biotechnology / bacteria / cleaning agents / durability / mortar

Résumé en anglais

In this work, air lime mortars were bioformulated with two innovative bioproducts, one resulting from iron-supplemented Escherichia coli cultures and a second one exploiting microbial mixed cultures grown with crude glycerol as substrate. The bioproducts were lyophilized and, for the mortar formulation, suspendedin water and used as mixing liquid. Workability of mortars was evaluated by the flow table consistence and 90-days-old samples were tested for different properties, such as thermal conductivity, bulk density,porosimetry, water absorption, drying, surface hardness and compressive strength. With water content to ensure workability, bioformulated mortars presented higher thermal insulation and reduced water absorption when compared with a non-bioformulated control mortar. However, the presence of bioproducts decreased the compressive strength of the air lime mortar. Contact with water, simulating weathering, diminished that decrease.The strategy utilized in the present work meet so me of the goals of a circular economy approach maximizing natural resources by the use of wastes to produce the bioproducts and increasing lime mortars durability.

DOI

https://doi.org/10.1016/j.jobe.2020.101985