Banca de DEFESA: CLEANTO CARLOS DE QUEIROZ JUNIOR

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : CLEANTO CARLOS DE QUEIROZ JUNIOR
DATE: 30/06/2022
TIME: 08:30
LOCAL: Remota
TITLE:

STUDY OF THE INFLUENCE OF THE PARTIAL REPLACEMENT OF NATURAL SAND BY THE CUTTING WASTE OF ORNAMENTAL STONES ON THE PROPERTIES OF MORTARS FOR 3D PRINTING

KEY WORDS:

Mortar, 3D printing, RPPO, mechanical properties, residue.

PAGES: 74
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Materiais Não-Metálicos
SPECIALTY: Materiais Conjugados Não-Metálicos
SUMMARY:

The substitution of natural raw materials by residues, especially in the construction industry, has been widespread. This is due to the reduction of the environmental impact caused by the extraction of raw materials, as well as the cost reduction with the proper destination of residues. Likewise, the number of researches that study new construction methods has grown, such as 3D printing, an alternative to production of materials in an intelligent way, with less cost and waste, in addition to lower production time. Thus, this work aimed to evaluate the influence of the partial replacement of fine aggregate using the ornamental stone cutting residue (RPPO - acronym in portuguese) on the properties of mortars for 3D printing. Initially, a reference mortar was produced that met the consistency and workability parameters for 3D printing and, later, the fine aggregate was replaced by RPPO in proportions of 5, 10 and 15%. For the determination of the fresh and hardened state properties of the mortars, consistency, squeeze-flow, water absorption, specific mass, and mechanical strength were carried out. In addition, the physical and chemical characterization of the RPPO was carried out by granulometry, X-ray diffractometry (XRD) and X-ray fluorescence (FRX). The results indicate that the addition of RPPO increased the mechanical strength, however, it also increased the absorption and the void index, because of the presence of calcite in the residue. The mortar density also decreased with the presence of RPPO. Therefore, the partial replacement of natural sand by RPPO provided greater mechanical strength to the mortar, but also caused an increase in absorption and void content.

BANKING MEMBERS:
Presidente - 1298936 - ANTONIO EDUARDO MARTINELLI
Externo à Instituição - KLEBER CAVALCANTI CABRAL - UFERSA
Externo à Instituição - ULISSES TARGINO BEZERRA - IFPB