scholarly journals Reusing Iraqi Construction and Aggregates Waste to Manu-facturing Eco-Friendly Polymer Concrete

2019 ◽  
Vol 29 (3) ◽  
pp. 63
Author(s):  
Awham M. Hameed ◽  
Mohammad T. Hamza
Keyword(s):  
Physical Characteristic ◽  
Low Cost ◽  
Construction And Demolition Waste ◽  
Polymer Concrete ◽  
Schmidt Hammer ◽  
Cement Concrete ◽  
Demolition Waste ◽  
The World ◽  
Different Types ◽  
Rebound Hardness

The recycling and reusing of waste materials to produce suitable materials is very important subjects to scientific research in world now, because the decrease natural resources and create a hole or risk in future of the world. The aim of our research to produce polymer concrete (PC) has high mechanical and physical characteristic. This PC was prepared by using the waste of aggregates and demolitions to make PC have good mechanical and physical characteristic with low cost as compared as cement concrete. In this research different types of construction and demolition waste were used as aggregates replacement (i.e. waste of cement/concrete debris, waste of ceramics and the waste of blocks) while the type of polymer resins (i.e. Epoxy) as cement replacements. The weight percentages of resin were changed within (20, 25 and 30) % to manufacture this polymer concrete. The tests we done like physical such as den-sity and mechanical such as compressive strength, flexural strength. Splitting tensile strength and Schmidt hammer rebound hardness.

scholarly journals A New Low-Cost and Reliable Method to Evaluate the Release of Hg0 from Synthetic Materials

Processes ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1282
Author(s):  
Marta Lazzaroni ◽  
Barbara Nisi ◽  
Daniele Rappuoli ◽  
Jacopo Cabassi ◽  
Orlando Vaselli
Keyword(s):  
Low Cost ◽  
Central Italy ◽  
Elemental Mercury ◽  
Blocking Agent ◽  
Construction And Demolition Waste ◽  
Concrete Wall ◽  
Demolition Waste ◽  
Mining Site ◽  
Gaseous Elemental Mercury ◽  
Synthetic Materials

Mercury is a toxic and noxious element and is the only metal that naturally occurs as gas. One of the most challenging topics (included in the United Nations Minimata convention) is to understand the adsorption–release processes of manmade materials (e.g., concrete, bricks, tiles, painting). Adsorption of Hg by construction and demolition waste materials has recently been studied, but investigations on how much Hg0 can be released from these products are rather poor. The abandoned mining site of Abbadia San Salvatore (Siena, central Italy) where, for about one century, cinnabar was roasted to produce liquid mercury, is known for the high concentrations of (i) Hg0 in edifices and structures and (ii) total and leachate Hg in synthetic materials. In the present paper, a new, simple and low-cost method to measure the amount of GEM (Gaseous Elemental Mercury) released from anthropic materials (concrete, wall rocks, and tiles) located in the Hg0-rich environments of the former mining site, is proposed. The efficiency of a specific paint that was supposed to act as blocking agent to Hg0 was also tested.

scholarly journals Role of Nanomaterials in the Treatment of Wastewater: A Review

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 495 ◽  
Author(s):  
Asim Ali Yaqoob ◽  
Tabassum Parveen ◽  
Khalid Umar ◽  
Mohamad Nasir Mohamad Ibrahim
Keyword(s):  
Wastewater Treatment ◽  
Low Cost ◽  
Review Article ◽  
Polluted Water ◽  
Flowing Water ◽  
Health Issues ◽  
Modern Equipment ◽  
The World ◽  
Different Types

Water is an essential part of life and its availability is important for all living creatures. On the other side, the world is suffering from a major problem of drinking water. There are several gases, microorganisms and other toxins (chemicals and heavy metals) added into water during rain, flowing water, etc. which is responsible for water pollution. This review article describes various applications of nanomaterial in removing different types of impurities from polluted water. There are various kinds of nanomaterials, which carried huge potential to treat polluted water (containing metal toxin substance, different organic and inorganic impurities) very effectively due to their unique properties like greater surface area, able to work at low concentration, etc. The nanostructured catalytic membranes, nanosorbents and nanophotocatalyst based approaches to remove pollutants from wastewater are eco-friendly and efficient, but they require more energy, more investment in order to purify the wastewater. There are many challenges and issues of wastewater treatment. Some precautions are also required to keep away from ecological and health issues. New modern equipment for wastewater treatment should be flexible, low cost and efficient for the commercialization purpose.

Application of PC and PMC in Industry and Industrial Environment

2013 ◽  
Vol 687 ◽  
pp. 21-25 ◽  
Author(s):  
David W. Fowler
Keyword(s):  
Portland Cement ◽  
Polymer Concrete ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Industrial Environment ◽  
The World ◽  
Polymer Modified Concrete ◽  
Parking Facilities

Abstract: Polymer concrete and polymer-modified concrete have been widely used around the world since the 1970s. Polymer concrete has been used for repair of portland cement concrete, for overlays and for precast components. Polymer-modified concrete has been used extensively for overlays for bridges and parking facilities and as a thin spray-on mortar for exterior surfaces.

Use of Waste Materials in the Production of Concrete

2014 ◽  
Vol 634 ◽  
pp. 85-96 ◽  
Author(s):  
Jorge Brito ◽  
Rui Silva
Keyword(s):  
Economic Growth ◽  
State Of The Art ◽  
Construction And Demolition Waste ◽  
Waste Materials ◽  
Demolition Waste ◽  
Industrial Activities ◽  
China And India ◽  
Rapid Economic Growth ◽  
Different Types ◽  
The University

The world’s demand for construction aggregates has been increasing over the last years, mainly due to the rapid economic growth of countries such as Brazil, China and India. Naturally, this growth stimulates the development of construction and demolition activities, thereby generating increasing amounts of waste. This paper presents a state-of-the-art review of the experimental research on the effect of incorporating aggregates of different types and shapes, sourced from construction and demolition waste. This review also covers studies on the incorporation of waste materials coming from industrial activities, emphasising those performed in the Instituto Superior Técnico, of the University of Lisbon, Portugal.

scholarly journals Study case about the production of masonry concrete blocks with CDW and kaolin mining waste

2021 ◽  
Vol 8 (6) ◽  
pp. 990-1004
Author(s):  
Felipe Bastos ◽  
◽  
Adeildo Cabral ◽  
Perboyre Alcântara ◽  
Lino Maia ◽  
...  
Keyword(s):  
Total Solid ◽  
Raw Material ◽  
Construction And Demolition Waste ◽  
Kaolin Clay ◽  
High Grade ◽  
Demolition Waste ◽  
The World ◽  
Concrete Blocks ◽  
Study Case ◽  
Natural Aggregates

<abstract> <p>The worldwide generation of construction and demolition waste is about 30% to 35% of the total solid waste produced annually. In addition, the extraction of minerals leaves a high-grade environmental liability with tailings, such as kaolin clay, Brazil being one of the countries with the largest deposits and production of this mineral in the world. The kaolin clay extraction serves several industries such as ceramics, crockery, and paper, among others. The objective of this work is to insert these two wastes as raw material of construction elements, specifically masonry concrete blocks, thus giving an end to the residues, demonstrating their reutilization potential. Here, blocks were manufactured with replacement of natural aggregates, stone powder, and sand, by construction and demolition waste and of kaolin clay waste. The replacement percentages were up to 34% and 16%, respectively. The blocks made with pneumatic vibration compacting procedure presented strength beyond than what is established by norm, thus giving a favorable perspective of use for these residues as building elements.</p> </abstract>

Incorporation of Fired Ceramic Waste into Binary and Ternary Earth-Binder (S) Mixtures for Compressed Blocks

2014 ◽  
Vol 798-799 ◽  
pp. 498-502
Author(s):  
Wilson Acchar ◽  
Jaquelígia B. Silva ◽  
Vamberto M. Silva ◽  
Luciano Costa Góis ◽  
Ana M. Segadães
Keyword(s):  
Construction Industry ◽  
Low Income ◽  
Low Cost ◽  
Building Construction ◽  
Construction And Demolition Waste ◽  
Ambient Conditions ◽  
Demolition Waste ◽  
Waste Dumps ◽  
Compressed Earth Blocks ◽  
Earth Blocks

In Brazil, the majority of construction and demolition waste materials (CDW) is sent to waste dumps or landfill sites. Having low cost applications in mind, this work has the purpose of investigating the effect of the incorporation of fired ceramic rubble reclaimed from CDW obtained directly from the building construction industry on the final properties of compressed earth blocks, which are especially interesting in low-income and marginalized communities. To this aim, clay-based mixtures containing up to 5 wt.% of ceramic rubble were prepared. Lime and cement were added as binders (6, 8, 10 and 12 wt.%). Cylindrical test pieces were produced by uniaxial compression and left to harden at ambient conditions for 7, 28 and 56 days. The hardened specimens were characterized in terms of microstructure (SEM), compressive strength, water absorption and wear resistance. The results obtained in physical and mechanical evaluation tests demonstrated that small contents of ceramic rubble from the building construction industry can easily be incorporated into compressed earth blocks without degradation of typical properties, enabling savings in cement addition.

scholarly journals New System to Determine the Evolution of the Dynamic Young’s Modulus from Early Ages in Masonry Mortars

2020 ◽  
Vol 10 (22) ◽  
pp. 8129
Author(s):  
Engerst Yedra ◽  
Daniel Ferrández ◽  
Carlos Morón ◽  
Edmundo Gómez
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Low Cost ◽  
Construction Materials ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Dynamic Young’S Modulus ◽  
Cement Mortars ◽  
Dynamic Young's Modulus ◽  
Mechanical Disturbances

This work presents a new method to determine the evolution of the dynamic Young’s modulus (MOE) from small mechanical disturbances caused by cement mortar samples and whose value is collected using a low-cost Arduino accelerometer. The results obtained are correlated with measurements made using traditional ultrasound techniques, in addition to the evolution of MOE being related to the variation in mechanical properties that cement mortars experience over time. In this way, in this work, a secure application method is presented that allows us to advance the knowledge of construction materials with the incorporation of construction and demolition waste (CDW) and—more specifically—of cement mortars made with aggregates recycled from ceramic or concrete waste.

scholarly journals Ecofibers for the Reinforcement of Cement Mortars for Coating Promoting the Circular Economy

2020 ◽  
Vol 12 (7) ◽  
pp. 2835 ◽  
Author(s):  
Carolina Piña Ramírez ◽  
Alejandra Vidales Barriguete ◽  
Julián García Muñoz ◽  
Mercedes del Río Merino ◽  
Patricia del Solar Serrano
Keyword(s):  
Circular Economy ◽  
Building Materials ◽  
Cement Mortar ◽  
Construction And Demolition Waste ◽  
Construction Sector ◽  
Demolition Waste ◽  
Vapour Permeability ◽  
Cement Mortars ◽  
Different Types ◽  
Recycled Fibres

Nowadays, nobody can deny that climate change is a reality and that the life cycle of buildings contributes greatly to that reality. Therefore, proposals such as the circular economy must be integrated into the construction sector. This article shows part of the results of a research project whose objective is to introduce circular economy criteria in building materials, seeking new uses for construction and demolition waste from buildings. In particular, this article analyses the possibility of replacing fibres currently used to reinforce cement mortars with recycled fibres. After consulting the bibliography, we can conclude that some studies analyse the behaviour of cement mortars reinforced with different types of fibres, but none has been found that analyses the behaviour of these mortars for the application of continuous coatings. For this purpose, a two-stage experimental plan is designed to test cement mortar samples with different types of fibres, recycled fibres and commercial fibres, taking into consideration the characteristics that these mortars have to comply to be applied as continuous coatings. Moreover, a detailed study about the porosity of these mortars and its influence on how the mortars behave with regard to compression, water vapour permeability and impermeability has been conducted. From the results obtained, it can be concluded that the mortars containing recycled fibres have very similar resistance, absorption and permeability values to those containing commercial fibres, so that they might be suitable for application as external coatings.

scholarly journals REVIEW ON GREEN BUILDING RATING TOOLS WORLDWIDE: RECOMMENDATIONS FOR AUSTRALIA

2019 ◽  
Vol 25 (8) ◽  
pp. 831-847
Author(s):  
I. M. Chethana S. Illankoon ◽  
Vivian W. Y. Tam ◽  
Khoa N. Le ◽  
Cuong N. N. Tran ◽  
Mingxue Ma
Keyword(s):  
Sustainable Development ◽  
Greenhouse Gases ◽  
Green Building ◽  
Environmental Issues ◽  
Green Buildings ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Adverse Impacts ◽  
The World ◽  
Emission Of Greenhouse Gases

Buildings could be led to adverse impacts on environment, such as generation of construction and demolition waste, and emission of greenhouse gases (GHG). Therefore, promotion on development of green buildings is in need. With the increasing awareness in sustainable development, various rating tools are promoted to evaluate the performance of green buildings. Nowadays, these tools function as a guideline for green building development. There are various green building rating tools developed worldwide, and various countries follow different rules, incentives and regulations. However, despite of promotion of green building rating tools, environmental issues from buildings are still significant in Australia. This research compared green building rating tools in Australia and other countries or regions around the world. This research found that rating tools in Australia lack of (1) mandatory criteria and (2) regulations and incentives. This paper recommended that governmental incentives should be promoted.

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