984 resultados para Demolition waste


Relevância:

60.00% 60.00%

Publicador:

Resumo:

Pós-graduação em Geografia - IGCE

Relevância:

60.00% 60.00%

Publicador:

Resumo:

Pós-graduação em Geociências e Meio Ambiente - IGCE

Relevância:

60.00% 60.00%

Publicador:

Resumo:

Pós-graduação em Geografia - IGCE

Relevância:

60.00% 60.00%

Publicador:

Resumo:

The large volume of waste generated by construction and demolition has become increasingly a matter of concern to society. The handling and disposal of RCD's to gain prominence as over the years intensified the requirements for a sustainable world. This paper presents the positive and negative factors that the management of construction and demolition waste can bring in the municipality of Guaratinguetá-SP. This study examines the methods used in waste management since he was not done any treatment to the present day. Presents comparative tables on the feasibility of installing a central crushing of inert waste and implementation of an inert waste landfill in the municipality of Guaratinguetá and Cachoeira Paulista. And yet the work being done by the city of Guaratinguetá reuse the material in class A in paving roads

Relevância:

60.00% 60.00%

Publicador:

Resumo:

This work presents the results obtained in analyzes of aggregates from construction and demolition waste produced by the plant of the City of Guaratinguetá. Using this data and comparing with the specifications of NBR 15115, it was found that the materials do not possess the requisite minimum characteristics to be utilized as a basis for low-pavement traffic. In order to identify the main reasons of the material does not fit in the standard, we used the data obtained in a study conducted by Professor. Dr. Luiz Eduardo de Oliveira at the plant of the company AB Environmental Solutions Ltd., located in Pindamonhangaba. With different characteristics, the aggregates from construction and demolition waste produced by this plant showed the possibility of using pavements. The use of these residues in paving reduces the impact on the environment caused by construction.

Relevância:

60.00% 60.00%

Publicador:

Resumo:

Taking as starting the environmental, social and economic impact of construction and demolition waste in Brazilian cities were created legal mechanisms for management and administration, seeking to minimize the impacts to the maximum, since the irregular deposition can be characterized as environmental crime. CONAMA Resolution No. 307 of 2002 establishing the mandatory implementation of an Integrated Management System Construction Waste and Demolition, guiding the classification and designation of the waste generating agents, collection agents and transporters, and the areas of culling and disposal of waste. The technical partnership between the Ministry of Cities, the Environment Ministry and the Caixa Econômica Federal, coordinated by Pinto & Gonzales (2005) Management in the work and management of construction waste, proposed a guidance manual to guide the implementation of a System Integrated Management of Construction Waste in Municipalities. The municipality of Guanambi in the state of Bahia, in full economic rise, lacks a waste management of construction and demolition, since there has areas for the disposal of waste being proposed in this paper the diagnosis of waste generation in the municipality as part of the methodology proposed by the work of Pinto & Gonzales (2005).

Relevância:

60.00% 60.00%

Publicador:

Resumo:

Deconstructions, although hardly covered in Civil Engineering courses, are a very important field of study. Due to numerous factors, such as obsolescence, buildings life cycle comes to an end leading to their deactivations. Decommissioning is a process that intends to plan the hole deactivation by providing the cleaning of contaminated areas, avoiding risks to public health, as well as promoting a screening of generated waste, whether dangerous or not, offering their correct disposal or even reuse when possible. Decommissioning must be developed by a plan that covers from the recognition of the area until its releases to other uses. When this procedure is appropriate, attention must be paid to the cost effective of its implementation and to the cleaning standard that the plan intends to reach. The execution of the service allows to reuse the area, becoming productive again

Relevância:

60.00% 60.00%

Publicador:

Resumo:

CONAMA Resolution 307 / 02, in Article 4, states that the primary goal of those involved in the reuse process of construction and demolition waste is not the generation of such wastes, secondarily is the reduce, reuse, recycling and proper disposal of such material. The disposal problem of large volumes of waste generated coupled with the scarcity of natural resources and environmental degradation involved in the extraction process of such materials resulted in several studies, that after many analyzes proposed various forms of reuse and recycling . The NBR 15.116/04 provides requirements for the use of recycled aggregates in paving and concrete without structural function. This work aims to show the usage potential of recycled aggregates from waste generated in construction and demolition sampled Group AB Areias, Pindamonhangaba (SP) in order to meet the standards in Brazil, as well as the environmental contribution by reducing the use of raw materials extracted from nature. After stabilization and particle size analysis of the California Bearing Ratio and Proctor, obtained mixtures of recycled aggregates showed higher values submitted by the minimum standards related, with excellent potential for use in paving

Relevância:

60.00% 60.00%

Publicador:

Resumo:

The current problematic of the construction and demolition (C&D) waste faced for the Brazilian cities, is one of the main degradation factors of the environment, over all about the promise of the urban ambient quality. This scenery must mainly to the unsustainable management adopted by the great majority of the Brazilian cities. Therefore, this work aims at to offer subsidies for medium cities, having as study object the city of Rio Claro-SP, (Brazil), in the elaboration of plans and integrated programs of sustainable management of the construction and demolition waste, in accordance with CONAMA Resolution nº 307/2002, that’s set up a sustainable management system of C&D waste. In this direction, the diagnosis of the management was elaborated for the city of Rio Claro, (generation, collects, transport and disposal) and the public administration of the construction and demolition waste, as well as of the study of the related aspects with C&D waste recycling plant. Later, was suggested a plan of improvements for the public manager of C&D waste: areas of temporary disposal to facility the appropriating destination, appropriated areas of final disposal, incentives to the recycling of C&D waste, new legislations, education and orientation programs and adequacy the agents of C&D waste management (generating, transporting, addressee and public manager), directing for an environmental, economic and social sustainability.

Relevância:

60.00% 60.00%

Publicador:

Resumo:

Pós-graduação em Engenharia Civil - FEIS

Relevância:

60.00% 60.00%

Publicador:

Resumo:

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Relevância:

60.00% 60.00%

Publicador:

Resumo:

Two of the major problems caused by construction activity are the production of construction and demolition waste (CDW) and the exploitation of mineral resources, causing big impacts on the environment. Therefore, the recycling has been shown as an alternative to mitigate the harmful effects of waste on the urban environment and prevent the exploitation of new raw materials. This course work aims to study the behavior of recycled aggregates from Vale do Paraíba in concrete and mortar. Initially, it presents the definitions of recycled aggregates according to CONAMA Resolution No. 307/2002, the aggregate settings for concrete and mortar (such as the grain size, its origin and density, and the characterization parameters according to ABNT), and the definition of ACI method of concrete mix design. Afterwards, it presents the characterization of materials separated by assays. After that, it shows the theoretical concrete proportioning applying the ACI method and experimental concrete proportioning. Then, the analysis of results is performed to finally conclude that the materials provided can't be used to replace natural aggregates because they cannot have the same performance. With the studies, it could be observed that the recycled aggregate presents a great complexity and diversity in origin, therefore the form how the material should be handled requires great care

Relevância:

60.00% 60.00%

Publicador:

Resumo:

Two of the major problems caused by construction activity are the production of construction and demolition waste (CDW) and the exploitation of mineral resources, causing big impacts on the environment. Therefore, the recycling has been shown as an alternative to mitigate the harmful effects of waste on the urban environment and prevent the exploitation of new raw materials. This course work aims to study the behavior of recycled aggregates from Vale do Paraíba in concrete and mortar. Initially, it presents the definitions of recycled aggregates according to CONAMA Resolution No. 307/2002, the aggregate settings for concrete and mortar (such as the grain size, its origin and density, and the characterization parameters according to ABNT), and the definition of ACI method of concrete mix design. Afterwards, it presents the characterization of materials separated by assays. After that, it shows the theoretical concrete proportioning applying the ACI method and experimental concrete proportioning. Then, the analysis of results is performed to finally conclude that the materials provided can't be used to replace natural aggregates because they cannot have the same performance. With the studies, it could be observed that the recycled aggregate presents a great complexity and diversity in origin, therefore the form how the material should be handled requires great care

Relevância:

60.00% 60.00%

Publicador:

Resumo:

Il calcestruzzo è uno dei materiali più utilizzati nell’edilizia, ma il meno sostenibile. Per la sua produzione vengono sfruttate elevate quantità di risorse naturali non rinnovabili con un impatto ambientale non trascurabile, sia per le sostanze emesse in atmosfera, sia per le macerie derivate post utilizzo. L’ingresso nel XXI secolo ha segnato definitivamente l’affermazione del concetto di sviluppo sostenibile nei riguardi di tutti i processi produttivi dei beni, che devono essere necessariamente strutturati secondo una logica di risparmio energetico e di controllo della produzione di scorie e rifiuti, prevedendone un loro riutilizzo in altri settori, o un loro smaltimento senza provocare danni all’ambiente. Anche l’industria del cemento e del calcestruzzo è chiamata a svolgere il proprio ruolo per contribuire ad un miglior bilancio ecologico globale, indirizzando la ricerca verso possibilità d’impiego di materiali “innovativi”, che siano in grado di sostituire parzialmente o totalmente l’uso di materie prime non rinnovabili, tenendo conto dell’enorme richiesta futura di infrastrutture, soprattutto nei paesi in via di sviluppo. Negli ultimi anni si sta sempre più affermando il potenziale del riciclo dei materiali ottenuti dalla demolizione di edifici (C&DW – Construction and Demolition Waste), questo dovuto anche a politiche di gestione dei rifiuti che incentivano il risparmio, il riutilizzo, il riciclo e la valorizzazione dei beni. I calcestruzzi con aggregati di riciclo sono generalmente suddivisi in due macrogruppi: quelli ottenuti da aggregati di riciclo di solo calcestruzzo (RCA – Recycled Coarse Aggregate) e quelli da aggregati da demolizione totale (MRA – Mixed Recycled Aggregate) che però contengono molte impurità. Come anche uno può subito pensare gli aggregati riciclati hanno delle proprietà diverse da quelli naturali, questi contengono oltre l’aggregato naturale anche il legante coeso, polveri di laterizio, vetro, ceramica, plastica eccet., i quali offrono una miscela ricca di cloruri, solfati, silice amorfa ed altri componenti dannosi per la nuova miscela di calcestruzzo. In presenza di questi prodotti, gli aggregati non solo non soddisfano i requisiti chimici, ma influiscono negativamente anche sulle proprietà fisico-meccaniche del calcestruzzo. Per questo vedremmo in questa tesi tramite un accurata analisi degli aggregati, e del loro “contributo” per il corretto comportamento del calcestruzzo, leggendo criticamente come le normative regolano i requisiti che gli aggregati debbono soddisfare, vedendo le varie possibilità di riutilizzo dei materiali di riciclo da demolizione. La tesi mira all'incentivo dei materiali da riciclo, come scelta sostenibile per il futuro dell'edilizia. E' stato calcolato che la produzione totale di macerie da demolizione nel mondo, non supera il 20% in massa degli aggregati che vengono utilizzati per la produzione del calcestruzzo nei paesi sviluppati. Dai vari studi è stato valutato in media che col solo 20% di riciclato sostituito, le caratteristiche del calcestruzzo indurito cambiano di poco dal normale miscelato con aggregati naturali; ovviamente se gli aggregati da riciclo sono stati selezionati e sottoposti ai vari test delle norme europee standardizzate. Quindi uno può subito pensare in linea teorica, tralasciando i costi di gestione, trasporto eccet. , che basta utilizzare per ogni metro cubo di calcestruzzo 20% di riciclato, per rispondere allo smaltimento dei rifiuti da C&D; abbassando cosi i costi degli inerti naturali, sempre parlando di economie di scala. Questo è in linea teorica, ma riflette un dato rilevante. Nel presente lavoro si partirà da una veloce lettura sul comportamento del calcestruzzo, su i suoi principali costituenti, concentrandoci sugli aggregati, analizzandone le sue proprietà fisico-meccaniche, quali la granulometria, la resistenza meccanica e la rigidezza, valutando l’importanza dei legami coesivi tra aggregato alla pasta cementizia. Verranno inoltre analizzate le azioni deleterie che possono instaurarsi tra aggregato di riciclo e pasta cementizia. Dopo aver visto le varie politiche sulla gestione dei rifiuti, la legislazione passata e presente sull’uso dei materiali riciclati, si analizzeranno vari studi sulle proprietà fisico-meccaniche dei calcestruzzi con aggregati di riciclo seguiti da università e poli di ricerca internazionali. Se gli aggregati di riciclo sono selezionati con metodo, in presenza di piani di gestione regionale e/o nazionale, è possibile soddisfare le prestazioni richieste del calcestruzzo, nel rispetto delle politiche di sostenibilità economico-ambientali. Può essere il calcestruzzo riciclato una scelta non solo sostenibile, ma anche economica per il settore edile? Si può avere un calcestruzzo riciclato ad alte prestazioni? Quali sono le politiche da mettere in atto per un mercato di produzione sostenibile del riciclato? Questo e molto altro verrà approfondito nelle pagine seguenti di questa tesi.