No abstract

It is a well-known fact that industrial solid wastes which are commonly employed in construction sector make a significant contribution in reduction of environmental pollution. In this study, solid borax waste and silica fume were used as additive materials. In the briquette compositions, 3, 5 and 10% proportions of solid borax waste and 2, 5 and 10% proportions of silica fume were used in mixtures. In order to determine material characterization, micro structure (SEM) analyses of solid borax waste and silica fume were performed besides of physical and mechanical tests. Moreover, DTG analyses were implemented to specify material's behavior under high temperature loads. According to the test results, the values of maximum compressive strength and minimum bulk density were obtained using mixtures with proportions of 2% silica fume and 10% solid borax waste. Additionally, it was determined that the briquettes having low density and high compressive strength could be produced using aforementioned all mixtures.Key words: Clay brick, Silica fume, Solid borax waste. ResumenEs un hecho bien conocido que los desechos industriales sólidos que son comúnmente empleados en el sector de la construcción, ya que hacen una contribución significativa en la reducción de la contaminación ambiental. En este estudio, los residuos de bórax sólido y el humo de sílice se utilizaron como materiales aditivos. En las composiciones de briquetas, se utilizaron en mezclas proporciones de 3, 5 y 10% de residuos de bórax sólido y proporciones de 2, 5 y 10% de humo de sílice. Con el fin de determinar la caracterización de los materiales, se realizaron análisis de microestructura (SEM) de residuos sólidos de bórax y de sílice, además de pruebas físicas y mecánicas. Además, se realizaron análisis de DTG para especificar el comportamiento del material bajo cargas de alta temperatura. De acuerdo con los resultados de la prueba, se obtuvieron los valores de resistencia máxima a la compresión y densidad aparente mínima con mezclas con proporciones de 2% de humos de sílice y 10% de residuos sólidos de bórax. Finalmente, se determinó que briquetas que tenían baja densidad y alta resistencia a la compresión se podrían producir, usando todas las mezclas mencionadas anteriormente.Palabras clave: Ladrillo de arcilla, humo de sílice, desechos sólidos de bórax.

Mechanical properties of mortar containing recycled asphaltRecycled asphalt is used in this paper as replacement for a part of cement in the production of cement composite. A part of cement was replaced with a sieved recycled asphalt powder in the proportion of 5 to 15 % of the cement weight. The testing comprised the analysis of density, Blaine specific surface area, setting time, particle size distribution, compressive strength, resistance to freezing and thawing, water absorption, and the SEM-EDS and XRD analyses. The results show that the density, compressive strength, and Blaine surface area decrease, and that toughness increases, with an addition of recycled asphalt into cement composite. Key words:recycled asphalt, mechanical properties, durability properties, microstructure, mineralogical structure Stručni rad Özlem Çelik Sola, Cemil Ozyazgan Mehanička svojstva morta s dodatkom recikliranog asfalta U radu je korišten reciklirani asfalt kao zamjena dijela cementa za pripremu cementnog kompozita. Dio cementa je zamijenjen prosijanim prahom od recikliranog asfalta u omjeru od 5 do 15 % na masu cementa. Ispitivanje je obuhvatilo analizu gustoće, Blainove specifične ploštine, vrijeme vezivanja, granulometrijski sastav, tlačnu čvrstoću, otpornost na smrzavanje i odmrzavanje, apsorpciju vode te SEM-EDS i XRD analize. Rezultati su pokazali da se dodatkom recikliranog asfalta u cementnom kompozitu smanjuje gustoća, tlačna čvrstoća i Blainova specifična ploština, a povećava se žilavost mješavina.