Propiedades físicas y mecánicas del hormigón usando polvo residual de desechos orgánicos como reemplazo parcial del cemento

Abstract

The continued growth in demand for cement has raised concerns in the industry about environmental and sustainability issues. In addition, the worldwide generation of large quantities of solid waste threatens human health and on environmental quality. This paper proposes to assess the feasibility of using a residual powder derived from organic waste of vegetable or animal origin for replacing part of Portland cement during concrete production. Specifically, the powder is derived from a living being such as the remains of food (meat, vegetables, fruits and eggshells), paper, wood, bones and seeds. Its scientific contribution is a conscious change due to development of an alternative material to contribute with more sustainable processes in the construction industry. Three types of mixtures for cement content were studied: aggregate/cement (A/C) ratios of 15, 10 and 6. Concrete samples were then made by replacing the cement with organic waste powder in percentages of 5%, 10%, 15%, and 20%. These mixtures were evaluated for their physical and mechanical properties. The results showed that the reference concrete had higher compressive strength than the concrete with low cement content (A/C ratio of 15:1). However, samples made with 5% of powder and an A/C ratio of 10:1 presented values at least 2.1% greater than compressive strength of the reference concrete. Mixtures rich in cement (A/C ratio of 6:1) and the powder replacements of up to 10% showed in the best mechanical behavior in 13% in relation to the reference concrete. Therefore, waste powder can be used as filling material to replace part of the cement, resulting in denser and more resistant concrete, as well as less specific absorption and voids.

Analysis of the mechanical resistance of cement with aggregates of petrous endocarp from macadamia nut

“…Unlike traditional inorganic materials, organic waste has a shorter biodegradation time, and its manufacturing process is designed to minimize pollution [2], while their intrinsic properties (like hardness or porosity), along with their relative abundance, present a clear advantage for being employed in construction industry. Thus, various investigations have resulted in efficient constructive elements with organic aggregates that match or improve some characteristics of common industrialized materials [3].…”

Analysis of the Mechanical Properties of Concrete Mix Added with Water Lily Ash (Eichornnia Crassipes)

“…Natural fibers and demolition wastes have been used to improve the mechanical properties of concrete mixtures [3][4][5]. However, the integrity of organic matter is compromised by the final use of the construction material [6,7]. Some investigations have been conducted to determine the effect of nopal mucilage or aloe vera in stabilizing concrete mixtures.…”