Fabrication and Mechanical Characterization of Geopolymeric Pavers Obtained by Using Demolition Waste

Palomino-Ñaupa C.K.; Medina-Huaco L.M.; Huamán-Mamani F.A. · Nanotechnology Perceptions (2024) · DOI: 10.62441/nano-ntp.v20is4.66

Resumen

Demolition residues (bricks, mortars and concrete) were collected, separated, crushed, ground and sieved into powder. The powder obtained was mixed with sodium hydroxide solution of various molar concentrations (9, 12 and 15 molar) until workable plastic pastes were obtained. The pastes obtained were used as binders in geopolymeric mortars and pavers, which were evaluated physically, microstructurally and mechanically (at 14 and 28 days of curing). In parallel, and for comparison purposes, conventional Portland cement mortars and pavers were manufactured. The microstructure found in conventional and geopolymeric mortars and pavers was similar, presenting two well differentiated phases, a continuous one of binder and a discontinuous one of unconnected fine aggregate particles. In general, the geopolymeric materials manufactured presented less porosity than the conventional ones and their mechanical strength was lower, although sufficient for their application as type I pavers (according to the Peruvian technical standard-NTP 399.611).

Instituciones: Universidad Católica San Pablo