Polymeric Waste from Recycling Refrigerators as an Aggregate for Self-Compacting Concrete

Abstract

The inadequate disposal of household appliances by consumers and industries have annually been generating enormous amounts of polymeric waste (PW). So, the interest in reuse of PW in civil construction has increased. The production of new cementitious materials, such as concrete with PW, proves to be a promising solution to inappropriate disposal of this waste. In this study, self-compacting concrete (SCC) was developed with partial replacement of the coarse aggregates by polymeric waste (PW) from the recycling of refrigerators. In the SCC reference mixture, Portland cement, silica fume, sand, gravel and superplasticizer were used. The study also grouped the gravel as replaced by 5%, 10%, 15% and 20% of PW. In order to analyze the samples, the following tests were used: spreading, viscosity, passing ability, compressive strength, tensile strength, microstructure, modulus of elasticity, specific gravity, absorption, voids index and electrical resistivity. The SCC found showed adequate homogeneity and viscosity, staying within the normative parameters. The mechanical resistance was above 20 MPa; specific mass between 1870 to 2260 kg/m3; modulus of elasticity ranged from 34 to 14 GPa; and electrical resistivity between 319 to 420 ohm.m. Due to the mechanical resistance, the SCC with PW can be used for structural purposes and densely reinforced structures such as pillars, beams and foundation elements.

Effect of Silica Fume as a Waste Material for Sustainable Environment on the Stabilization and Dynamic Behavior of Dispersive Soil

“…The use of silica fume (SF) in different engineering applications provides an important advantage in environmentally and economically sustainable ways. SF has been used both as a partial cement replacement in concrete production [17][18][19][20][21] and to improve the engineering properties of problematic soils [22][23][24]. SF was first used in several countries during the industrial revolution of the mid-twentieth century to reduce the release of material into the atmosphere [25].…”

Use of recycled aggregates from civil construction in self-compacting mortar

“…Recently, several studies have been developed on CAA with the addition or substitution of fine natural aggregates with fine recycled residues, of a mineral nature or from the manufacture of products, which are usually discarded, with some examples being mentioned, such as fly ash and bark ash. rice [14], recycled rubber powder waste [15], [16], marble and granite powder [17], [18], of plastics, as polymeric waste recycled from refrigerators [19]. With respect to construction and demolition waste, there is still little work on the subject.…”

Investigação das propriedades físicas e mecânicas do compósito cimentício autoadensável com substituição do agregado miúdo por resíduo de vidro

“…A evolução constante da construção civil provoca a busca de tecnologias inovadoras para melhorar a qualidade e segurança das edificações e reduzir o impacto causado no meio ambiente, tendo a construção civil grande importância nas pesquisas nas áreas sustentáveis (Silva et al, 2020).…”