Specific mass and water absorption from concrete manufactured with alternate aggregates


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Title: Specific mass and water absorption from concrete manufactured with alternate aggregates

Author(s): Edson Carlos Araujo, Fabricio Moura Dias

Publication: IBRACON

Volume: 4

Issue: 5

Appears on pages(s): 764 773

Keywords: concrete, sludge from water treatment plant, artificial sand, steel slag, aggregates.

Date: 11/30/2011

Concrete is the second most used material on the planet. Due to strong growth in emerging economies, there is an expectation of greater consumption of material in the coming years. Due to this growth, we can observe that the environment is being greatly damaged by the generation of waste. There are several sectors that generate these wastes, among them stands out the steel, the water treatment and the extraction of gravel as raw material for concrete producers. Therefore, this paper presents a study on the use of alternative solid waste as aggregates for the manufacture of concrete. The residues used are: sludge Water Treatment Station (WTS), Manufactured Sand and Steel Slag. For both concrete mixtures were used to replace all or part of the fractions of coarse aggregate (crushed) and fine aggregate (sand). This substitution was made in mass. To benchmark adopted a trait that is standard with the use of 100% of the constituents of concrete by concrete adopted in the region. The admisture corresponds to a standard adopted characteristic compression strength of 25 MPa and a water/cement ratio of 0,61. The concrete were analyzed for physical properties according to ABNT normes. The results of concrete tests made with artificial sand and steel slag show as efficient material for structural applications. However, the concrete with the addition of WTS can be used for non-structural, such as filling element in projects that require low resistance to compression. These data were statistically analyzed by ANOVA and the results indicate that with judicious use, waste studied here, may be alternative to the traditional use of aggregates for concrete manufacture.

Brazilian Institute of concrete, International Partner Access.