Mechanical Analysis of Asphalt Pavements with Alternative Materials in Manaus - Amazonas

Pathologies in urban roads are common and recurring problems in the municipality of Manaus - AM, where defects have appeared early and successfully, especially the climatic condition of the differentiated region and the non-participation of the coarse aggregate in the asphaltic coating and sublayers. predominantly made of clay. Nevertheless, the Government often performs simple "hole-covering" operations to recover and restore such a structure, corroborating all the problems that trigger poor paving in the State Capital of Amazonas. Another challenge of the municipal administration is the disposal of construction waste, making it necessary to recycle it, highlighting the serious environmental problem caused by the extraction of the pebble. Aiming to contribute with alternatives the scarcity of stone material and the natural aggregate (pebble), substitute of gravel in the regional civil construction, it is proposed the use of construction and demolition waste (RCD). Asphalt concrete (AS) mixtures were made with recycled material, residual sand, portland cement, petroleum asphalt cement (CAP 50/70) and this binder modified with the addition of SBS (styrene and butadiene copolymer). Characterization tests were performed with aggregates, filler and petroleum asphalt cement (original and polymer), dosed by the Marshall method, and the asphalt mixtures were subjected to the Beam Fatigue Test at three different stress levels. The studies indicated satisfactory results of asphalt mixtures with the participation of RCD and SBS binder, compared to regional composites.

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A Practice for the Application of Waste in Road Asphalt Pavements in an Eco-Friendly Way

Applied Sciences ◽

10.3390/app11199268 ◽

2021 ◽

Vol 11 (19) ◽

pp. 9268

Author(s):

Francesca Russo ◽

Cristina Oreto ◽

Rosa Veropalumbo

Keyword(s):

Life Cycle ◽

Asphalt Mixture ◽

Asphalt Mixtures ◽

Construction And Demolition Waste ◽

Base Layer ◽

Asphalt Pavements ◽

Life Cycle Assessment Methodology ◽

Demolition Waste ◽

Road Asphalt ◽

Jet Grouting

The integration of circular economy principles in the design of road pavements raises the problem of obtaining high-performance asphalt mixtures for reduction of waste and environmental pollution compared to traditional solutions. In this study, the base and binder layers of road asphalt pavements were prepared by using reclaimed asphalt pavement and construction and demolition waste as coarse aggregates, while jet grouting waste and fly ash served as fillers. A leaching test was performed for the marginal materials, after which the engineering performances of the designed asphalt mixtures were investigated through laboratory tests. A life cycle assessment methodology was applied to determine the life cycle impacts of one cubic meter of each asphalt solution. Next, a multi-criteria decision analysis (MCDA) was performed for the solutions suggested for the binder and base layers. Finally, a sensitivity analysis was conducted to identify the most suitable MCDA solutions by varying the weights for a total of 24 different weight configurations. The results of this work revealed that the solutions utilizing jet grouting waste (in particular, the hot asphalt mixture for the binder layer and cold asphalt mixture for the base layer) were preferred to other traditional and alternative solutions in most decision-making scenarios.

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Minimisation and management strategies for refurbishment and renovation waste in Hong Kong

Engineering Construction & Architectural Management ◽

10.1108/ecam-02-2021-0113 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Ann T.W. Yu ◽

Kelvin S.H. Mok ◽

Irene Wong

Keyword(s):

Hong Kong ◽

Data Collection ◽

Management Strategies ◽

Government Support ◽

Construction And Demolition Waste ◽

Snowball Sampling ◽

Structured Interviews ◽

Demolition Waste ◽

Content Type ◽

The Government

PurposeThe capacity of landfills will reach saturation in the 2020s. There are more than 50,000 buildings in Hong Kong over 30 years old and which may require extensive refurbishment under the Mandatory Building Scheme. Additionally, most new owners/tenants tend to renovate their premises before moving in. Hence, there is an urgent need in Hong Kong, to explore strategies and measures to enable the development of effective refurbishment and renovation (R&R) waste management for such projects. The objectives of this paper are to investigate the process of R&R for identifying the perceived barriers and thereby the strategies for minimisation and management of R&R waste in Hong Kong.Design/methodology/approachDesktop study, semi-structured interviews, site observations and document reviews were used as the data collection methods to achieve the objectives of this research. Considering the nature and characteristics of the industry structure, the snowball sampling process was deployed for data collection. Thematic analysis and content analysis were used for data analysis. Waste minimisation and management strategies for R&R projects were then discussed and developed by the research team and a focus group meeting was held to validate the research findings. Six strategies were then proposed to the government.FindingsR&R projects contribute 10–20% of the construction and demolition waste. The barriers to recycling of R&R waste can be grouped into six major categories: (1) lack of sorting and storage spaces, (2) high cost, (3) insufficient government supporting policy, (4) complicated recycling processes, (5) immature recycling market and (6) insufficient public education. Also, six strategies are proposed in this study, which include (1) pre-refurbishment audit, (2) development of recycling market, (3) sea reclamation, (4) incineration, (5) government support and (6) education and research.Originality/valueThe strategies and measures proposed in this research could most adequately serve as reference for the government officials, building professionals and academic researchers. Such knowledge would make possible the development of effective strategies and measures for minimising and managing R&R waste.

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Laboratory Evaluation of Hot Asphalt Concrete Properties with Cuban Recycled Concrete Aggregates

Sustainability ◽

10.3390/su10082590 ◽

2018 ◽

Vol 10 (8) ◽

pp. 2590 ◽

Cited By ~ 6

Author(s):

Debora Acosta Alvarez ◽

Anadelys Alonso Aenlle ◽

Antonio Tenza-Abril

Keyword(s):

Asphalt Concrete ◽

Aggregate Size ◽

Asphalt Mixtures ◽

Recycled Concrete ◽

Construction And Demolition Waste ◽

Recycled Aggregates ◽

Laboratory Evaluation ◽

Maximum Aggregate Size ◽

Demolition Waste ◽

Aggregate Fraction

Recycled Aggregates (RA) from construction and demolition waste (CDW) are a technically viable alternative to manufacture of asphalt concrete (AC). The main objective of this work is to evaluate the properties of hot asphalt mixtures that have been manufactured with different sources of CDW (material from concrete test specimens, material from the demolition of sidewalks and waste from prefabrication plants) from Cuba. Dense asphalt mixtures were manufactured with a maximum aggregate size of 19 mm, partially replacing (40%) the natural aggregate fraction measured between 5 mm and 10 mm with three types of RA from Cuba. Marshall specimens were manufactured to determine the main properties of the AC in terms of density, voids, stability and deformation. Additionally, the stiffness modulus of the AC was evaluated at 7 °C, 25 °C and 50 °C. The results corroborate the potential for using these sources of CDW from Cuba as a RA in asphalt concrete, thereby contributing an important environmental and economic benefit.

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Dynamic Incentive Mechanism Design for Recycling Construction and Demolition Waste under Dual Information Asymmetry

Sustainability ◽

10.3390/su11102943 ◽

2019 ◽

Vol 11 (10) ◽

pp. 2943 ◽

Cited By ~ 3

Author(s):

Qidan Hu ◽

Ying Peng ◽

Chunxiang Guo ◽

Dong Cai ◽

Peiyang Su

Keyword(s):

Information Asymmetry ◽

Construction And Demolition Waste ◽

High Tech ◽

Demolition Waste ◽

Incentive Theory ◽

The Government ◽

Dynamic Cooperation ◽

Technology Level ◽

Incentive Mechanism Design

The generation of construction and demolition waste (CDW) is a problem for societies aspiring to sustainability. In this regard, governments have the responsibility to support the CDW recycling through subsidies. However, the information asymmetry, as well as the “dynamic nature” of the CDW recycling market, results in a number of barriers for the government to promote CDW recycling. In this paper, we establish a mathematical model that includes the government and the recycling enterprise in the presence of dual information asymmetry including the unknown recycling technology level and unobservable recycling efforts in one-stage and two-stage cooperation. Using the incentive theory, the static and dynamic optimal recycling incentive contracts of the government were designed, and the optimal decisions of the recycler were identified. A numerical simulation revealed that by designing reasonable contracts, the government can encourage the recycler to report the true technical level and achieve information screening. Furthermore, the subsidy of the high-tech recycler remained unchanged under different circumstances. However, the subsidy of the low-tech recycler was closely related to the probability of misreporting and the proportion of technology types. This finding suggests that the government and recycler are inclined towards long-term dynamic cooperation.

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A review on the evaluation of the potential utilization of construction and demolition waste in hot mix asphalt pavements

Resources Conservation and Recycling ◽

10.1016/j.resconrec.2020.104956 ◽

2020 ◽

Vol 161 ◽

pp. 104956 ◽

Cited By ~ 1

Author(s):

Abdulgazi Gedik

Keyword(s):

Hot Mix Asphalt ◽

Construction And Demolition Waste ◽

Asphalt Pavements ◽

Demolition Waste

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Influence of Partial Coarse Fraction Substitution of Natural Aggregate by Recycled Concrete Aggregate in Hot Asphalt Mixtures

Sustainability ◽

10.3390/su12010250 ◽

2019 ◽

Vol 12 (1) ◽

pp. 250 ◽

Cited By ~ 5

Author(s):

Debora Acosta Álvarez ◽

Anadelys Alonso Aenlle ◽

Antonio José Tenza-Abril ◽

Salvador Ivorra

Keyword(s):

Asphalt Concrete ◽

Coarse Fraction ◽

Asphalt Mixtures ◽

Recycled Concrete ◽

Construction And Demolition Waste ◽

Recycled Aggregate ◽

Concrete Aggregate ◽

Recycled Concrete Aggregate ◽

Demolition Waste ◽

Natural Aggregate

The main objective of this work is to evaluate the properties of hot asphalt mixtures that have been manufactured with different recycled concrete aggregate (RCA) percentages (0%, 20%, 40%, 60% and 80% of the fraction 5–13 mm) and asphalt (4%, 4.5% and 5%). Dense asphalt mixtures were made; partially replacing the natural aggregate (NA) fraction between 5 and 13 mm. Marshall specimens were manufactured to determine the main properties of the asphalt concrete (AC) in terms of density, voids, stability and deformation. Additionally, the optimal asphalt content (OAC) was determined, and measured the water sensibility, the stiffness modulus and the permanent deformation. The results corroborate the potential for using these sources of construction and demolition waste (CDW) as a RCA in asphalt concrete and show that the hot asphalt mixtures with up to 40% substitution of natural aggregate by recycled aggregate in the fraction 5–13 mm present good behavior.

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Incentive or Punitive Measure? Analysis of Environmental Regulations in Construction and Demolition Waste Recycling

Mathematical Problems in Engineering ◽

10.1155/2021/6619980 ◽

2021 ◽

Vol 2021 ◽

pp. 1-14

Author(s):

Jingsong Yang ◽

Jing Zhang ◽

Chunxiang Guo ◽

Ruwen Tan ◽

Minjiu Yu

Keyword(s):

Decision Making ◽

Social Welfare ◽

Environmental Regulations ◽

Waste Recycling ◽

Incentive Regulation ◽

Construction And Demolition Waste ◽

Demolition Waste ◽

Decision Making System ◽

Measure Analysis ◽

The Government

In order to investigate the formulation of appropriate environmental regulations in construction and demolition waste (CDW) recycling, this paper establishes a CDW recycling decision-making system consisting of a contractor, a developer, and the government and analyses the decision-making results and influencing factors of the various stakeholders. Three different types of environmental regulations have been considered in the model: (i) no regulation, (ii) incentive regulation, and (iii) punitive regulation. The research shows that the incentive regulation offers the constructor greater incentives to recycle CDW and yields higher profits for members of the system, and however, when recycling is very costly and CDW is highly damaging, punitive regulation should be implemented, as the incentive regulation leads to lower social welfare. In addition, governments should be more cautious when adopting incentive regulation, because social welfare may be negative under this condition whereas there is no such possibility under the punitive regulation.

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Influence of Milled Material and Construction Waste on the Properties of a Typical Soil of Iranduba City - AM / BR

International Journal for Innovation Education and Research ◽

10.31686/ijier.vol7.iss12.2070 ◽

2019 ◽

Vol 7 (12) ◽

pp. 348-355

Author(s):

Marcos Raiker Printes Ferreira ◽

David Barbosa de Alencar ◽

Felipe Wilson Leão da Silva ◽

Fábio Martins da Silva ◽

Consuelo Alves da Frota

Keyword(s):

Construction And Demolition Waste ◽

Natural Soil ◽

Technical Solution ◽

Demolition Waste ◽

Construction Waste ◽

Milled Material ◽

Stone Material ◽

Selection Parameters ◽

The City ◽

Typical Soil

The lack of stone material in the State of Amazonas and the possibility of using solid waste in the sublayers of pavements motivates the work in question, notably with the purpose of contributing as an alternative technical solution to the paving of the city of Iranduba / AM / BR. Compositions of soil mixed with waste from milled material (MM) and construction and demolition (CDW) were studied. The materials participating in the formulations were physically characterized, as well as the mechanical behavior of the natural soil (NS) and mixtures of soil-20% milled material (NS + 20MM) and soil-20% construction and demolition waste were determined. (NS + 20CDW). The results showed that the compositions with the participation of the milled material were the most efficient relative to the mixtures with the presence of the construction and demolition residue. It is noteworthy that both formulations, referring to natural soil, improved the expansion and presented an increase in the California Bearing Ratio, selection parameters for application in the base and subfloor layers.

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Efficient supervision strategy for illegal dumping of construction and demolition waste: A networked game theory decision-making model

Waste Management & Research ◽

10.1177/0734242x211032031 ◽

2021 ◽

pp. 0734242X2110320

Author(s):

Chenyu Liu ◽

Chunxiang Hua ◽

Jianguo Chen

Keyword(s):

Decision Making ◽

Forest Fires ◽

Evolutionary Game ◽

Small World ◽

Economic Benefits ◽

Construction And Demolition Waste ◽

Demolition Waste ◽

Illegal Dumping ◽

Government Supervision ◽

The Government

While the construction industry has brought substantial economic benefits to society, it has also generated substantial construction and demolition waste (CDW). Illegal dumping, which refers to dumping CDW in an unauthorized non-filling location, has become widespread in many countries and regions. Illegally dumping CDW destroys the environment, causing groundwater pollution and forest fires and causing significant economic impacts. However, there is a lack of research on the decision-making behaviours and logical rules of the main participants, construction contractors and the government in the illegal CDW dumping process. This paper constructs an evolutionary game model on a small-world network considering government supervision to portray the decision-making behaviours of illegal dumping participants and conducts a numerical simulation based on empirical equations to propose an effective supervision strategy for the government to manage illegal CDW dumping efficiently. It is found that the illegal dumping behaviours of contractors are mainly affected by the intensity of government supervision, the cost of fines and the income of illegal dumping; while for government, a supervision strategy is found to be necessary, and a supervision intensity of approximately 0.7 is the optimal supervision probability given supervision efficiency. Notably, under a low-level supervision probability, increasing the penalty alone does not curb illegal dumping, and a certain degree of supervision must be maintained. The results show that in addition to setting fines for illegal dumping, the government must enforce a certain level of supervision and purify the market environment to steadily reduce illegal dumping.

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