Avaliação das propriedades físicas e mecânicas de blocos de solo-cimento formulados com coprodutos siderúrgicos

Abstract

RESUMOEste trabalho tem por objetivo caracterizar o desempenho de resistência mecânica e absorção de água de blocos solo-cimento para alvenaria, após 28 dias de cura, com a incorporação limite dos seguintes coprodutos siderúrgicos em substituição parcial ao solo: adições de até 20 % em massa do pó de balão coletado em altoforno, até 10 % de poeiras de despoeiramento de aciaria elétrica, e até 20 % de escória granulada de forno elétrico a arco. As formulações propostas incluem adições simultâneas de pós obtidos do descarte da produção de blocos solo-cimento, onde a substituição parcial ao solo foi de até 20 % em massa. Os resultados obtidos sugerem a potencialidade de uso dos resíduos siderúrgicos em blocos intertravados de solo-cimento para alvenaria sustentável, como alternativa de aplicação para esses resíduos. Verificou-se a possibilidade de bons resultados confrontando os valores exigidos por norma (absorção de água < 20% e resistência mecânica > 2,0 MPa) com destaque quando se utilizou 20% pó de balão juntamente com 10% de reuso do bloco solocimento; 10% de escória de aciaria ou 20% de escória de aciaria juntamente com 10% de reuso do bloco solo-cimento; e 2,5% de pó de despoeiramento juntamente com 20% de reuso do bloco solo-cimento. Palavras-chave:Coprodutos siderúrgicos, solo-cimento, alvenaria sustentável, estabilização. ABSTRACTThis work aims to characterize the mechanical resistance performance and water absorption of soil-cement blocks for masonry, after 28 days of moist curing, with the incorporation limit of the following steel coproducts to partial replacement of soil: up to 20% by weight of balloon blast furnace dust powder additions, 10% of dedusting dust secondary from electric arc furnace, and 20% of granulated slag of electric arc furnace. The proposed formulations also evaluated simultaneous additions of soil-cement blocks discarded, after granulated by crushing, with partial replacement of soil in up to 20% by mass. The results suggest the potential use of steel residues in soil-cement interlocked blocks for sustainable masonry, as applying alternative to this waste. It was found that the results that stood out, comparing standard specification (water absorption < 20% and strength > 2.0 MPa), the results that stood out were using 20% powder flask along with a 10% reuse of the soil-cement block; 10% of steel slag or 20% of steel slag with 10% reuse of soil-cement block; and 2.5% dusting powder with 20% reuse of the soil-cement block.

Soil-cement blocks: a sustainable alternative for the reuse of industrial solid waste

“…According to Castro et al (2016), it is possible to incorporate steel by-products, such as balloon blast furnace dust powder, electric furnace dust, and granulated blast furnace slag. The authors point out that the wastes used are composed of granulometries corresponding to the typical range of fine and medium sand, except for balloon blast furnace dust powder, which is finer.…”

Soil-cement bricks with insertion of scheelite-tailings: Mechanical behavior and physico-chemical evaluation of kneading water

“…The technology of soil-cement also makes possible the viability of incorporating products of residual origin to the material, contributing, under the sustainable aspect, with the correct targeting of industrial by-products that act as aggressive mechanisms to the environment. The tailings, from the fine processing, from the scheelite extraction, due to its granulometry similar to the soil used in this technology, becomes possible to be used as recycled aggregate, advocating environmentally correct advantages that are directly linked to the brick production practice of soil-cement with recycled raw materials (Castro, Costa, Borba, Fagury-Neto & Rabelo, 2016).…”

Manufacture of Soil-Cement Bricks With the Addition of Sugarcane Bagasse Ash

“…Soil-cement bricks are produced by pressing and do not require subsequent burning, and therefore are designated "green bricks" (Castro et al, 2016). Estabragh et al (2011) reported that soil-cement bricks could be used for slope and landfill protection and also as a pavement base in highways.…”