Use of Bioceramics Enhanced with Effective Microorganisms as an Additive for Construction. Study of Physical and Mechanical Properties in Cement Mortars and Gypsum Plasters

María Jesús Morales-Conde,Manuel Alejandro Pedreño-Rojas,Filomena Pérez-Gálvez

doi:10.3390/app11083519

María Jesús Morales-Conde, Manuel Alejandro Pedreño-Rojas + Show 1 more

Open Access

https://doi.org/10.3390/app11083519

Copy DOI

Journal: Applied Sciences	Publication Date: Apr 14, 2021
Citations: 1	License type: CC BY 4.0

Affiliation: Universidad de Sevilla

Abstract

Biomaterials are materials that are used to manufacture devices that interact with biological systems. According to their chemical composition, they can be classified as biometals, biopolymers, bioceramics, biocomposites and semiconductors. Thus, in the present work, the application of bioceramics, enhanced with effective microorganisms, to construction materials (cement mortars and gypsum plasters) was studied in order to see the benefits that its incorporation contributes to construction materials. This first work constitutes the first phase of an experimental campaign in which the influence of bioceramics on the physical and mechanical properties (flexural and compressive strength) of the studied materials was analyzed. Furthermore, scanning electron microscopy (SEM) and mercury intrusion porosimetry (MIP) techniques were used. According to the results, a slight improvement in the mechanical properties of the new composites was observed. Besides, a more compact matrix was observed when bioceramics were used as an aggregate to the mixtures.

Highlights

A more compact matrix was observed when bioceramics were used as an aggregate to the mixtures
Summary, results obtained from the tests performed and their measureAs allall thethe results obtained from the tests performed and their measurement ment variability (CoV)
Bioceramics were used as additives, in different percentages, to the generation of new gypsum plasters and cement mortars in order to study their effect on the physical and mechanical properties of these materials

Summary

Bioceramics

The bioceramics used are aluminum silicate (atomized porcelain) in a very fine powder, a particle diameter of 42 μm (Figure 1). It has a pH diluted at 1% in H2 O of 8.4 and a density of 2.6 g/cm. Its chemical composition is as follows (Table 1): Appl. Sci. 2021, 11, x FOR PEER REVIEW with

Gypsum Plasters

Dry State Density

Mechanical Properties

Mechanical

Fresh State Bulk Density

Conclusions