Mechanical and thermal performance of a geopolymeric and hybrid material based on fly ash

This article presents an evaluation of the thermal behavior of a hybrid (FA/OPC) and geopolymer (FA100) material. The FA100 system is based on fly ash (FA), which has an elevated content of unburned material (14.8%). The FA/OPC system is comprised of a mixture of fly ash and ordinary Portland cement (OPC) at a proportion of 80/20. The thermal performance was evaluated by several tests, such as exposure to high temperatures (up to1000°C) and direct flame resistance. In addition, the effect of cyclic exposure was studied at 700°C for 10 cycles. FA/OPC hybrid material retains 92% of its initial strength and FA100 retains 113.3% of its initial strength at 700°C. Both materials can withstand 10 exposure cycles with a strength loss of less than 45%. In direct flame exposure, a temperature gradient of about 500°C was observed. These results indicate that these types of materials could possibly be used as fire-resistant materials in civil structures.

• Autores: Vásquez Molina, Diego Alejandro; Mejía Arcila, Johanna Mercedes; Mejía de Gutiérrez, Ruby
• Tipo de recurso: Article of journal
• Fecha de publicación: 2016
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/60604
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/60604; http://bdigital.unal.edu.co/58936/
• Palabra clave: 62 Ingeniería y operaciones afines / Engineering; fly ash; geopolymer; hybrid material; fire resistance
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional