Mechanical properties of polymer composites reinforced by silica-based materials of various sizes
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ORIGINAL ARTICLE
Mechanical properties of polymer composites reinforced by silica‑based materials of various sizes Ibrahim Alameri1 · Meral Oltulu1 Received: 21 May 2020 / Accepted: 11 July 2020 © King Abdulaziz City for Science and Technology 2020
Abstract Polymer composites have good mechanical, friction, durability, and wear performance after being reinforced with waste or nanofiller. These features make them flexible in many structural applications. This study was carried out to improve the mechanical performance of polymer composites using silica-based, waste, and nanomaterials. To achieve this, marble dust of millimeter size, silica fume of micrometer size, and Nano-SiO2 of nanometer size were added separately or in combination to the polymer matrix. The samples were tested to obtain the compressive strength, tensile strength, ultrasonic pulse wave velocity, dynamic modulus of elasticity, toughness, and density of reinforced polymer composites. The results of the tests on the polymer composites indicated that the best ratios were 30%, 5% and 1% for separately added marble dust, silica fume and nano-silica groups, respectively, while the contribution of nano-silica to marble dust/silica fume was the optimum when added by 1%. Moreover, the results showed that adding marble dust to polymer composites increased ductility while adding silica fume and nano-silica reduced the ductility of the samples. Additionally, the microstructural properties of the polymer composites with waste marble dust and silica fume, and nano-SiO2 additives were evaluated using a scanning electron microscope (SEM) to provide a close relationship between the morphological structure and mechanical properties. This study opens up a new way for added value using waste materials like marble dust/silica fume as well as nanomaterials in polymer composite applications. Keywords Polymer composites · Polyester · Waste materials · Nano-silica · Mechanical properties · SEM
Introduction Over the last two centuries, people have used mortar and concrete produced with Portland cement as common construction materials (Ohama 1995). This is due to their low cost, ease of application, and high compressive strength. On the other hand, traditional Portland cement concrete has some deficiencies because of its properties such as delayed hardening, large drying shrinkage, low flexural and splitting tensile strength, high permeability, and low chemical resistance (Toufigh et al. 2016). The use of polymers to reduce these deficiencies has been very popular in recent years (Nawy 2008; Fowler et al. 2012; Bulut and Şahin 2017). In the twenty-first century, polymer composites, which are a mineral aggregates bound together by a thermoset * Ibrahim Alameri [email protected] 1
Department of Civil Engineering, Faculty of Engineering, Ataturk University, Erzurum, Turkey
resin, have been widely used for traditional concrete repairs, as well as overlays of concrete bridge decks (Reis and Ferreira 2004; Wang et al. 2019). Applications of polymer composites in
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