Fresh and Hardened Properties of Self-Leveling Mortars with Porcelain and Red Ceramic Wastes

Valdir M Pereira,Gladis Camarini

doi:10.1155/2018/6378643

Valdir M Pereira, Gladis Camarini

Open Access

https://doi.org/10.1155/2018/6378643

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Abstract

Self-leveling mortar (SLM) has several advantages when compared to the conventional mortar used in subfloors, especially when productivity is desired. In Brazil, the use of SLM is not still widespread related to conventional mortar. Few builders are using it in constructions. In the same way, the sustainable reuse of wastes in building materials is not so great, but it has grown, becoming increasingly important. In Brazil, a great amount of waste is generated by the manufacture of electrical porcelain insulators and red ceramic. These materials are formed mainly by amorphous silicates and aluminosilicates, which when added as cement replacement can generate pozzolanic reactions. The present study evaluated the feasibility of using such wastes to replace cement to make SLM. Mortars were studied in the fresh state (fluidity, segregation and/or bleeding, outflow rate, outflow time, and kinetics of temperature) and in the hardened state (compressive strength, flexural tensile strength, capillary water absorption, water penetration height, and air permeability). According to the results, the cement replacement by porcelain or ceramic in SLM diminishes the flow and increases the setting time. The compressive strength is higher than the minimum related to literature, and the low values of water absorption and permeability were reached with porcelain waste.

Highlights

Self-leveling mortar (SLM) is a building material with the property of leveling by gravity. is property increases productivity at the construction site because it reduces the number of stages significantly when compared with conventional mortar used for the same purpose, and the material guarantees fast and productive leveling of subfloors before applying the final layer [1]
In order to continue to study the reuse of waste materials in buildings, this experimental work evaluated the use of porcelain and red ceramic waste as a cement replacement in preparing SLM, mainly to subfloors
Kinetics of Temperature. e kinetics of temperature of the SLM were determined by means of a pseudoadiabatic test for a period of 24 hours. e measurements were performed on SLM by two thermocouples placed inside the mortars, and the temperature variations were stored in a Testo 177-T4 datalogger (Figure 2)

Summary

Research Article

Fresh and Hardened Properties of Self-Leveling Mortars with Porcelain and Red Ceramic Wastes. In Brazil, the use of SLM is not still widespread related to conventional mortar. In Brazil, a great amount of waste is generated by the manufacture of electrical porcelain insulators and red ceramic. E present study evaluated the feasibility of using such wastes to replace cement to make SLM. Mortars were studied in the fresh state (fluidity, segregation and/or bleeding, outflow rate, outflow time, and kinetics of temperature) and in the hardened state (compressive strength, flexural tensile strength, capillary water absorption, water penetration height, and air permeability). The cement replacement by porcelain or ceramic in SLM diminishes the flow and increases the setting time. The cement replacement by porcelain or ceramic in SLM diminishes the flow and increases the setting time. e compressive strength is higher than the minimum related to literature, and the low values of water absorption and permeability were reached with porcelain waste

Introduction

Materials and Methods

Styrofoam cup Styrofoam container

Glass plate

Ceramic waste Porcelain waste Reference

Air permeability