Filter Medias from Recycled Concrete, Properties Investigated for Sorption Processes

2017 ◽  
Author(s):  
Ramune Zurauskiene ◽  
Marina Valentukeviciene ◽  
Youssef-Amine Boussouga
Keyword(s):  
Water Treatment ◽  
Waste Recycling ◽  
Recycled Concrete ◽  
Demolition Waste ◽  
Crushed Concrete ◽  
Concrete Properties ◽  
Particle Characteristics ◽  
Concrete Masonry ◽  
Milling Method ◽  
Water Absorbance

Every year construction demolition waste amount increases. 75 percent of this waste consists of concrete, masonry products and tile products. Concrete and reinforced concrete waste can be recycled and reused for new concrete product pro-duction, road installation, as well as formed water treatment. Crushed concrete particles are characterized by large surface area and many voids. These particle characteristics depend on used crushing-granulating method. Particles obtained by the milling method have larger number of voids, higher water absorbance and higher number of open pores. Crushed concrete particles, of which high amounts are formed in building or waste recycling sites, can be used as filler for water treatment filters.

A Brief Analysis of Domestic Construction and Demolition Waste Recycling Techniques

2012 ◽  
Vol 509 ◽  
pp. 1-5
Author(s):  
Su Ping Cui ◽  
Qi Dong Liu ◽  
Jian Hua Yan ◽  
Xin Du
Keyword(s):  
Natural Disaster ◽  
Waste Recycling ◽  
Recycled Concrete ◽  
Construction And Demolition Waste ◽  
Recycled Aggregate ◽  
Demolition Waste ◽  
Construction Waste ◽  
Healthy Development ◽  
Industrial Chain ◽  
Recycling Techniques

In this paper, the construction and demolition waste (C&D waste) recycling techniques in China is summarized, and proposed the C&D waste recycling suggestions in this foundation. The C&D waste can be divided into construction waste, decorating waste, demolition waste and natural disaster ruin waste. In addition to be buried, domestic C&D waste can be made into landscape material, roadbed material, recycled aggregate, recycled brick, recycled concrete, recycled admixture and so on. The state should establish positive promoting policies, improve the recycling industrial chain, and promote the healthy development of the C&D waste recycling.

scholarly journals Recycled concrete with coarse recycled aggregate. An overview and analysis

2018 ◽  
Vol 68 (330) ◽  
pp. 151 ◽  
Author(s):  
B. González-Fonteboa ◽  
S. Seara-Paz ◽  
J. De Brito ◽  
I. González-Taboada ◽  
F. Martínez-Abella ◽  
...  
Keyword(s):  
Natural Resources ◽  
State Of The Art ◽  
Recycled Concrete ◽  
Construction And Demolition Waste ◽  
Recycled Aggregate ◽  
Relevant Research ◽  
Demolition Waste ◽  
Waste Storage ◽  
Concrete Properties ◽  
Creep And Shrinkage

The construction field has contributed to environmental degradation, producing a high amount of construction and demolition waste (C&D waste) and consuming large volumes of natural resources. In this context, recycled concrete (RC) has been recognised as a means to preserve natural resources and reduce space for waste storage. During the last decades, many researchers have developed works studying different recycled concrete properties. This review focuses on structural RC made with coarse recycled aggregate from concrete waste. The main objective is to provide a state of the art report on RC’s properties and an analysis on how to predict them taking into account relevant research works. Moreover, the study tries to collect and update RC findings, proposing equations to define RC’s performance, in terms of mechanical strength, modulus of elasticity, stress-strain, creep and shrinkage.

scholarly journals Development of Concrete Incorporating Recycled Aggregates, Hydrated Lime and Natural Volcanic Pozzolan

2021 ◽  
Vol 6 (11) ◽  
pp. 155
Author(s):  
Natividad Garcia-Troncoso ◽  
Bowen Xu ◽  
Wilhenn Probst-Pesantez
Keyword(s):  
Compressive Strength ◽  
Recycled Concrete ◽  
Construction And Demolition Waste ◽  
Recycled Aggregate ◽  
Recycled Aggregates ◽  
Partial Replacement ◽  
Demolition Waste ◽  
Crushed Concrete ◽  
Natural Pozzolana ◽  
Concrete Materials

Recycling of construction and demolition waste is a central point of discussion throughout the world. The application of recycled concrete as partial replacement of mineral aggregates in concrete mixes is one of the alternatives in the reduction of pollution and savings in carbon emissions. The combined influence of the recycled crushed concrete, lime, and natural pozzolana on the mechanical and sustainable properties of concrete materials is firstly proposed in this study. In this research, unconventional construction materials are employed to produce concrete: the recycled crushed concrete is used as coarse aggregate, while lime and natural pozzolana are used as a partial replacement for cement. Substitutions of 10%, 20%, 50% of gravel are made with recycled aggregates, and 2%, 5%, 10% of cement with lime and natural pozzolan. Tests on the fresh and hardened properties, destructive (compressive strength) and non-destructive tests (sclerometer rebound and ultrasound) of mixtures are carried out. It is shown that the use of recycled materials can provide an increase in compressive strength of up to 34% with respect to conventional concrete. Life cycle cost and sustainability assessments indicate that concrete materials incorporating recycled aggregate possess good economic and environmental impacts.

scholarly journals Suitability Investigation of Recycled Concrete Aggregates for Concrete Production: An Experimental Case Study

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Woubishet Zewdu Taffese
Keyword(s):  
Construction Materials ◽  
Waste Recycling ◽  
Normal Weight ◽  
Recycled Concrete ◽  
Construction And Demolition Waste ◽  
Concrete Aggregate ◽  
Hardened Concrete ◽  
Demolition Waste ◽  
Concrete Production ◽  
The Difference

In developing countries, construction and demolition waste (CDW) is disposed to landfill, causing social, environmental, and economic crises. In these nations, CDW exponentially increase due to their rapid economic growth, industrialization, and urbanization. This paper aims to examine the possibility of recycling concrete waste for production of new concrete in Ethiopia. Physical and mechanical characteristics of recycled concrete aggregate (RCA) acquired from concrete waste are thoroughly examined. Though the RCA exhibited relatively lesser performance compared with the natural coarse aggregate (NCA), it reveals the same properties as of normal-weight aggregates in several instances. The performance of concrete specimens which employ RCA up to 20% is evaluated from workability, strength, and permeability aspects. The utilization of RCA slightly affects the workability and the water permeability properties of the concretes. Replacement of 10% of the NCA by the RCA enhances the compressive strength of the hardened concrete by 8%. The difference between the splitting tensile strength of the concretes which employ RCA and conventional aggregates is trivial. Generally, this work demonstrates the practicability of concrete waste recycling to produce new concrete or construction materials in Ethiopian context.

scholarly journals Influence of hydraulic jigging of construction and demolition waste recycled aggregate on hardened concrete properties

2021 ◽  
Vol 14 (3) ◽  
Author(s):  
Iago Lopes dos Santos ◽  
Luciana Vanni Frantz ◽  
Angela Borges Masuero
Keyword(s):  
Recycled Concrete ◽  
Construction And Demolition Waste ◽  
Recycled Aggregate ◽  
Recycled Aggregates ◽  
Hardened Concrete ◽  
Demolition Waste ◽  
Coarse Aggregates ◽  
Concrete Properties ◽  
Concrete Production ◽  
Wide Scale

abstract: Concern with the maintenance of natural resources has increased research about recycled aggregates for concrete production. However, the heterogeneity of recycled aggregates is one of the main constraints for their use in practice, because it can generate variability in concrete properties, hence reducing their final quality. Then, the jigging has been seen as a promising way of improving recycled aggregate quality. This paper aimed to evaluate its use for better application in concrete. A modified jig was used to sort recycled coarse aggregates. Concrete were produced with water/cement ratio from 0.5 and 100% of recycled coarse aggregate. The recycled aggregate properties upgrade were achieved and the results of compressive strength and modulus of elasticity of recycled concrete made with aggregate which were submitted to jigging were increased, indicating a potential application in wide scale.

Handbook of recycled concrete and demolition waste

2013 ◽  
Author(s):  
F. Pacheco-Torgal ◽  
V. W. Y. Tam ◽  
J. A. Labrincha ◽  
Y. Ding ◽  
J. de Brito
Keyword(s):  
Recycled Concrete ◽  
Demolition Waste

CONCRETO PERMEÁVEL COM AGREGADO DA RECICLAGEM DE RESÍDUOS DA CONSTRUÇÃO E DEMOLIÇÃO: REVISÃO BIBLIOGRÁFICA / PERMEABLE CONCRETE WITH AGGREGATE FROM CONSTRUCTION AND DEMOLITION WASTE RECYCLING: LITERATURE REVIEW

2020 ◽  
Vol 6 (9) ◽  
pp. 73169-73180
Author(s):  
Kelly Patrícia Torres Vieira Brasileiro ◽  
Bacus de Oliveira Nahime ◽  
Michell Macedo Alves ◽  
Pâmela Millena Kunan ◽  
Vitor Alvares ◽  
...  
Keyword(s):  
Literature Review ◽  
Waste Recycling ◽  
Construction And Demolition Waste ◽  
Demolition Waste

The influence of waste of concrete masonry units as coarse aggregate on concrete properties

2021 ◽  
Author(s):  
Hadeel R. Khatab ◽  
Mohanad IA. AL-Samaraie ◽  
Zaid Q. Mohammed ◽  
Abdullah A. AL-Samaraie
Keyword(s):  
Coarse Aggregate ◽  
Concrete Properties ◽  
Concrete Masonry ◽  
Masonry Units

Financial and economic evaluation of construction and demolition waste recycling in Hanoi, Vietnam

2021 ◽  
Vol 131 ◽  
pp. 294-304
Author(s):  
Ngoc Han Hoang ◽  
Tomonori Ishigaki ◽  
Rieko Kubota ◽  
Ton Kien Tong ◽  
Trung Thang Nguyen ◽  
...  
Keyword(s):  
Economic Evaluation ◽  
Waste Recycling ◽  
Construction And Demolition Waste ◽  
Demolition Waste

Environmental assessment of construction and demolition waste recycling in Bolivia: Focus on transportation distances and selective collection rates

2021 ◽  
pp. 0734242X2110291
Author(s):  
Navarro Ferronato ◽  
Gabriela Edith Guisbert Lizarazu ◽  
Marcelo Antonio Gorritty Portillo ◽  
Luca Moresco ◽  
Fabio Conti ◽  
...  
Keyword(s):  
Developing Countries ◽  
Environmental Impacts ◽  
Waste Recycling ◽  
Construction And Demolition Waste ◽  
Primary Data ◽  
Demolition Waste ◽  
Collection Rate ◽  
Material Recycling ◽  
Material Recovery ◽  
Selective Collection

Construction and demolition waste (CDW) management in developing countries is a global concern. The analysis of scenarios and the implementation of life cycle assessment (LCA) support decision-makers in introducing integrated CDW management systems. This paper introduces the application of an LCA in La Paz (Bolivia), where CDW is mainly dumped in open areas. The aim of the research is to evaluate the benefits of inert CDW recycling in function of the selective collection rate, defined as the amount of waste (%wt.) sorted at the source in relation to the total waste amount produced, and the distances from the CDW generation to the material recycling facility. The outcomes of the research suggest that increasing the selective collection rates (5% to 99%) spread the importance of transportation distances planning since it affects the magnitude of the environmental impacts (1.05 tCO2-eq to 20.7 tCO2-eq per km traveled). Transportation limits have been found to be lower than about 40 km in order to make recycling beneficial for all environmental impacts and for all selective collection rate, with the eutrophication potential as the limiting indicator. The theoretical analysis suggests implementing LCA with primary data and involving statistics related to the transportation of virgin materials avoided thanks to recycling. The outcomes of the research support the implementation of CDW recycling in developing countries since it has been found that material recovery is always beneficial.

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