Properties of geopolymers sourced from construction and demolition waste: A review

Alhawat, Musab; Ashour, Ashraf; Yıldırım, Gürkan; Aldemir, Alper; Şahmaran, Mustafa

doi:10.1016/j.jobe.2022.104104

Cited by 85 publications

(40 citation statements)

References 151 publications

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“…The works provided demonstrate the potential of useful materials composed on industrial byproducts (fly ash) and CDW that provide environmental benefits [38,39]. This approach is important from the point of view of implementation of circular economy, which emphasizes the essence of using recycling materials, saving natural resources [40][41][42], and reducing the ecological impact of building materials [43,44]. Furthermore, the research highlights the possibility of using mixed CDW for the manufacturing of geopolymer concrete.…”

Section: Discussionmentioning

confidence: 88%

Investigation of Mechanical Properties and Microstructure of Construction- and Demolition-Waste-Based Geopolymers

et al. 2022

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Construction and demolition waste (CDW) is the third-most abundant waste generated annually in the countries of the European Union. One of the alternatives to the use of these wastes is geopolymeric materials. Partial replacement of commonly used raw materials for the production of these materials can help reduce the number of landfills and the consumption of natural resources. In this study, the authors partially replaced metakaolin and fly ash with clay bricks and concrete debris. The research method in article is connected with analysis of microstructures and the mechanical and physical properties of the geopolymers. The results obtained show the possibility of manufacturing useful construction materials based on industrial byproducts (fly ash) and CDW. Compressive strength and flexural strength were, for samples containing metakaolin, 20.1 MPa and 5.3 MPa, respectively. Geopolymers containing fly ash displayed 19.7 MPa of compressive strength and 3.0 MPa of flexural strength. The results for both synthesized materials give them perspectives for future applications in the construction industry.

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Section: Discussionmentioning

confidence: 88%

Investigation of Mechanical Properties and Microstructure of Construction- and Demolition-Waste-Based Geopolymers

et al. 2022

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“…Shooshtarian et al [19] thought the increasing rate of construction waste generation indicates low resource efciency in the architecture, engineering, and construction industry. And in the implementation of new materials, Alhawa et al [20] found that there are still several barriers facing commercial of cleaner solution in the construction industry. Tere are also problems with the construction supply chain, such as Zheng et al [21] found the inefcient supply chain of CDW resource utilization hinders the green development of countries around the world, including China.…”

Section: Development Of Construction Waste Recyclingmentioning

confidence: 99%

“…Substituting equations ( 3), ( 4), ( 6), ( 11), ( 12), ( 14), ( 19), (20), and ( 22) into the objective function (25), we can obtain:…”

Section: Te Driving Path Of Incentivementioning

confidence: 99%

Incentive Regulation of Construction Waste Resource Recycling: Subsidy and Tax Incentive

Xiang

Zhang

Tan

et al. 2022

Mathematical Problems in Engineering

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Construction waste destroys the sustainability of environment and economy. In the study of game theory at present, the construction waste resource-based products supply chain only considers that there is only one type of enterprise producing renewable building materials or new building materials in the market, but in the construction market, there is no single type of enterprise. It isvery important for government to protect the environment and promote the resource utilization and development of construction waste. Therefore, this study establishes a game theory model between traditional building materials enterprise and construction waste recycling enterprise, which considers the decision-making behavior of enterprise under no regulation, subsidy incentive regulation, or tax incentive regulation. The findings are listed as follows: (1) both subsidies and tax incentives can effectively improve the economic benefits and production initiative of construction waste recycling enterprise. (2) The impact coefficient of unit new building materials on the environment and the tax rate of unit new building materials are the key factors that affect government decision-making. (3) Resource utilization cost coefficient and builder’s preference for renewable building materials have a great impact on the profits of construction waste recycling enterprise. These results will provide reference for the government to formulate incentive regulations and promote the development of construction waste resources.

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“…Our literature survey clearly indicates that clays and clay minerals play an important role in the construction industry, particularly as SCMs in cement and concrete, for making geopolymer cement and bricks. How clay and clay minerals modify the properties of the above construction materials have been studied in detail [21][22][23][24][25]. It has been reported that different clay and clay minerals affect the properties in different ways and to different extents.…”

Section: Introductionmentioning

confidence: 99%

Clays and Clay Minerals in the Construction Industry

Singh

2022

Minerals

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Clay is a naturally occurring material that can be converted to different clay minerals through thermal treatments, and can be used for the development of different products. Clays and clay minerals have been used for different applications in different sectors. Detailed information regarding the applications of these materials in the construction industry are described. Clay has been used as a supplementary cementitious material in Portland cement (OPC) mortars and concretes. These minerals decrease raw materials and CO2 emissions during the production of Portland cement clinker and, at the same time, increase the compressive strength of concrete at a later age. Therefore, they are conducive to the sustainability of construction materials. A new type of cement, Limestone calcined clay cement (LC3), and a binding material geopolymer cement have also been developed using clay minerals. The properties of these binders have been discussed. Applications of clay products for making bricks have are also described in this article.

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Properties of geopolymers sourced from construction and demolition waste: A review

Cited by 85 publications

References 151 publications

Investigation of Mechanical Properties and Microstructure of Construction- and Demolition-Waste-Based Geopolymers

Investigation of Mechanical Properties and Microstructure of Construction- and Demolition-Waste-Based Geopolymers

Incentive Regulation of Construction Waste Resource Recycling: Subsidy and Tax Incentive

Clays and Clay Minerals in the Construction Industry

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