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Appl. Sci. 2017, 7(10), 985;

Production of Aerated Foamed Concrete with Industrial Waste from the Gems and Jewels Sector of Rio Grande do Sul-Brazil

Laboratory of Environmental Studies for Metallurgy (LEAMet), Post-Graduation Program in Mining, Metallurgical and Materials Engineering (PPGE3M), Department of Engineering, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul 90130-120, Brazil
Post-Graduation Program in Civil Engineering (PPGEC), Department of Civil Engineering, Polytechnic School, Meridional College (IMED), Passo Fundo, Rio Grande do Sul 99070-220, Brazil
Author to whom correspondence should be addressed.
Received: 29 August 2017 / Accepted: 21 September 2017 / Published: 26 September 2017
(This article belongs to the Section Materials)
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The use of solid waste for the development of new building materials has been an alternative to reduce environmental impacts through the preservation of natural resources. In this context, this paper evaluates the possibility of using agate gemstone waste, called rolled powder, which basically consists of silica (SiO2), in the manufacture of aerated foamed concrete blocks completely replacing the natural sand. Preformed foam was used as the air entrained by mechanical stirring with a mixture of natural foaming agents derived from coconut. To produce test specimens, the water/cement ratio and foam concentrations were varied, with three and four levels, respectively. The specimens were left for 28 days at room temperature to be cured, and then underwent analysis to determine their compressive strength, density, and the distribution of air-voids. The experiments demonstrated that the best water/cement ratio was 1.28 for 18% (of total solid mass) addition of foam, which generated a sample with a density of 430 kg/m3, and a compressive strength of 1.07 MPa. The result for compressive strength is 11% smaller than the requirements of the Brazilian standard (NBR 13438) for autoclaved aerated concrete blocks, but the results are promising. View Full-Text
Keywords: agate waste; foaming agent; aerated concrete block agate waste; foaming agent; aerated concrete block

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Pedro, R.; Tubino, R.M.C.; Anversa, J.; De Col, D.; Lermen, R.T.; Silva, R.A. Production of Aerated Foamed Concrete with Industrial Waste from the Gems and Jewels Sector of Rio Grande do Sul-Brazil. Appl. Sci. 2017, 7, 985.

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