Environmental and economic perspectives of concrete with high mineral addition content: a case study

Concrete, the most consumed building material in the world, requires a large amount of natural resources, and its production has a strong impact on the increase of the greenhouse effect. Fly ash and ground granulated blast-furnace slag are highly available industrial by-products, which can replace c...

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Main Authors:	Isaia, Geraldo Cechella, Gastaldini, Antonio Luiz Guerra
格式:	Online
语言:	por
出版:	ANTAC - Associação Nacional de Tecnologia do Ambiente Construído 2008
在线阅读:	https://seer.ufrgs.br/ambienteconstruido/article/view/3537
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id	ojs-article-3537
record_format	ojs
spelling	ojs-article-35372008-04-17T13:28:40Z Environmental and economic perspectives of concrete with high mineral addition content: a case study Perspectivas ambientais e econômicas do concreto com altos teores de adições minerais: um estudo de caso Isaia, Geraldo Cechella Gastaldini, Antonio Luiz Guerra concreto com adições minerais; altos teores; custo; energia; emissão Co2; efeito estufa Concrete, the most consumed building material in the world, requires a large amount of natural resources, and its production has a strong impact on the increase of the greenhouse effect. Fly ash and ground granulated blast-furnace slag are highly available industrial by-products, which can replace cement in high contents with significant advantages. This paper presents a case study in which the replacement of cement in 90% by those two mineral additions has reduced costs in 5% in costs, energy consumption in 58%, and CO2 emission in 81%, and increased the durability mean index in 34%. The use of 90% mineral additions in 5.4% (351 Mm³) of the world’s concrete production, from 2005, could save 78Mt of cement, resulting in the maintenance of world cement production at the level of 1.78 Mt/year, without future increases. There would be an annual reduction of 130 Mt on the extraction of raw materials, an economy of 0.4 EJ in energy - the same consumed by Denmark - and a 8.7% reduction of production costs of concrete with 90% of fly ash and blast-furnace slag, compared to conventional Portland cement concrete. O concreto, material de construção mais consumido no mundo, requer elevada quantidade de recursos naturais, e sua produção contribui para o aumento do efeito estufa. Cinza volante e escória granulada de alto-forno são resíduos industriais com grande disponibilidade, podendo substituir o cimento em altos teores com significativas vantagens. Este trabalho apresenta estudo de caso demonstrando que a substituição do cimento pelas duas adições, em até 90%, acarretou diminuição de 5% no custo, 58% no consumo de energia, 81% na emissão de CO2, e aumentou em 34% o índice médio de durabilidade. A simulação do emprego do traço com 90% de adições minerais em 5,4% (351 Mm³) da produção mundial de concreto, a partir de 2005, economizaria 78 Mt de cimento, mantendo a produção atual de cimento no patamar de 1,78 Mt/ano, sem acréscimos futuros. Anualmente, deixariam de ser extraídas 130 Mt de matéria-prima, seriam economizados 0,40 EJ de energia, quantidade igual à consumida pela Dinamarca, e haveria ganho financeiro de 8,7% sobre o custo de produção do concreto com 90% de cinza volante e escória comparado ao concreto com cimento Portland comum. ANTAC - Associação Nacional de Tecnologia do Ambiente Construído 2008-04-17 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.ufrgs.br/ambienteconstruido/article/view/3537 Ambiente Construído; v. 4, n. 2 (2004): Edição Especial Resíduos na Construção Civil; 19-30 Ambiente Construído; v. 4, n. 2 (2004): Edição Especial Resíduos na Construção Civil; 19-30 Ambiente Construído; v. 4, n. 2 (2004): Edição Especial Resíduos na Construção Civil; 19-30 1678-8621 1415-8876 por https://seer.ufrgs.br/ambienteconstruido/article/view/3537/1937 Direitos autorais 2016 Ambiente Construído https://creativecommons.org/licenses/by/4.0
institution	Universidade Federal do Rio Grande do Sul
collection	OJS
language	por
format	Online
author	Isaia, Geraldo Cechella Gastaldini, Antonio Luiz Guerra
spellingShingle	Isaia, Geraldo Cechella Gastaldini, Antonio Luiz Guerra Environmental and economic perspectives of concrete with high mineral addition content: a case study
author_facet	Isaia, Geraldo Cechella Gastaldini, Antonio Luiz Guerra
author_sort	Isaia, Geraldo Cechella
title	Environmental and economic perspectives of concrete with high mineral addition content: a case study
title_short	Environmental and economic perspectives of concrete with high mineral addition content: a case study
title_full	Environmental and economic perspectives of concrete with high mineral addition content: a case study
title_fullStr	Environmental and economic perspectives of concrete with high mineral addition content: a case study
title_full_unstemmed	Environmental and economic perspectives of concrete with high mineral addition content: a case study
title_sort	environmental and economic perspectives of concrete with high mineral addition content: a case study
description	Concrete, the most consumed building material in the world, requires a large amount of natural resources, and its production has a strong impact on the increase of the greenhouse effect. Fly ash and ground granulated blast-furnace slag are highly available industrial by-products, which can replace cement in high contents with significant advantages. This paper presents a case study in which the replacement of cement in 90% by those two mineral additions has reduced costs in 5% in costs, energy consumption in 58%, and CO2 emission in 81%, and increased the durability mean index in 34%. The use of 90% mineral additions in 5.4% (351 Mm³) of the world’s concrete production, from 2005, could save 78Mt of cement, resulting in the maintenance of world cement production at the level of 1.78 Mt/year, without future increases. There would be an annual reduction of 130 Mt on the extraction of raw materials, an economy of 0.4 EJ in energy - the same consumed by Denmark - and a 8.7% reduction of production costs of concrete with 90% of fly ash and blast-furnace slag, compared to conventional Portland cement concrete.
publisher	ANTAC - Associação Nacional de Tecnologia do Ambiente Construído
publishDate	2008
url	https://seer.ufrgs.br/ambienteconstruido/article/view/3537
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Environmental and economic perspectives of concrete with high mineral addition content: a case study

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