New engineered stones: Development and characterization of mineral-glass composites

Autor(es)

Santos, G. G. ^[1] ; Crovace, M. C. ^[1] ; Zanotto, E. D. ^[1]

Afiliação do(s) autor(es)

^[1] Fed Univ Sao Carlos UFSCar, Dept Mat Engn DEMa, Ctr Res Technol & Educ Vitreous Mat CeRTEV, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: COMPOSITES PART B-ENGINEERING; v. 167, p. 556-565, JUN 15 2019.
• Citações Web of Science: 0

Resumo

Engineered stones are high-end materials increasingly being used as kitchen countertops, floor and facade tiles, as well as in other architectural applications. These materials consist of approximately 70-95 wt% of mineral particles (usually quartz) dispersed in a matrix made of cement, ceramics or, much more often, polymer resins. Despite their very attractive aesthetic appeal, using polymer matrices is associated to low wear resistance, low chemical resistance and degradation by UV radiation or by contact with hot objects; therefore the use of a glass matrix can overcome some of these disadvantages. This paper addresses the development, optimization of compositions and thermal treatment of a novel type of composite - engineered stones - using recycled window glass and four distinct minerals. New glass-mineral composites were developed containing up to 70% weight of albite, alumina, petalite or quartz (the rest being window glass). The materials were characterized for their flexural strength, hardness, water absorption, thermal shock resistance and chemical durability. Except for the Quartz/glass composites, low-porosity materials ( < 10%) with competitive properties if compared to commercial products were obtained. For instance, an Alumina/glass composite showed a (4-point) flexural strength of approximately 115 MPa and a hardness of 9 GPa, whereas commercial products (polymer and ceramic matrix) showed average values of 10 MPa and 70 GPa, respectively. The Petalite/glass composite exhibited high thermal shock resistance (Delta T-c similar to 330 degrees C); whereas the Albite/glass composite showed very good chemical durability, with practically unchanged weight and visual aspect after coming into contact with both acidic and alkaline concentrated solutions. This new type of composite is thus very promising and warrants further study and development. (AU)

• Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
• Beneficiário: Edgar Dutra Zanotto
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs