Impacts of high CDW levels on the chemical, microstructural, and mechanical behavior of cement-based mortars
To minimize the environmental impacts of construction and demolition waste (CDW) generation, it is essential to investigate sustainable materials' chemical and microstructural aspects, such as fine recycled concrete aggregate into cement-based mortars. A comprehensive experimental program was c...
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Elsevier
2025-07-01
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949822825000322 |
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| author | M.L. Peixoto S.D. Jesus H.S. Cavalcante B.S. Teti R.C. Manta N.B. Lima H.C.B. Nascimento S. Fucale N.B.D. Lima |
| author_facet | M.L. Peixoto S.D. Jesus H.S. Cavalcante B.S. Teti R.C. Manta N.B. Lima H.C.B. Nascimento S. Fucale N.B.D. Lima |
| author_sort | M.L. Peixoto |
| collection | DOAJ |
| description | To minimize the environmental impacts of construction and demolition waste (CDW) generation, it is essential to investigate sustainable materials' chemical and microstructural aspects, such as fine recycled concrete aggregate into cement-based mortars. A comprehensive experimental program was conducted to evaluate workability, compressive strength, and microstructural characteristics, providing insight into sustainable applications in construction. In this sense, the main goal of the present work is to examine the mechanical behavior of mortars produced with CDW due to their potential for introduction into the civil construction market. The mortars were made to evaluate the mechanical behavior and characterization tests of recycled and natural aggregates, consistency index, mass density, resistance to simple compression, x-ray diffraction, and scanning electron microscopy. The results revealed that the grains' maximum characteristic dimension corresponds to 2.36 mm, equivalent to the fine sand used. However, the water absorption of the recycled aggregate was 20.1 %, which is higher than the water absorption of fine sand, which corresponds to 12.5 %. The 1:4 ratio with 30 % replacement content showed better workability and compressive strength of 44.92 MPa. However, the 1:7 ratio showed high consistency rates due to the water-cement ratio. Further, the XRD results revealed diffraction peaks associated with Quartz, Portlandite, and Ettringite phases, corroborating the technical feasibility of using CDW. Finally, high partial replacements of fine natural aggregate by fine recycled concrete aggregate have technical and sustainable. This work highlights its potential to reduce construction costs and environmental impact, contributing to the circular economy. |
| format | Article |
| id | doaj-art-9029835c9a234bd58329890cd158376b |
| institution | Kabale University |
| issn | 2949-8228 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Next Materials |
| spelling | doaj-art-9029835c9a234bd58329890cd158376b2025-02-09T05:01:50ZengElsevierNext Materials2949-82282025-07-018100514Impacts of high CDW levels on the chemical, microstructural, and mechanical behavior of cement-based mortarsM.L. Peixoto0S.D. Jesus1H.S. Cavalcante2B.S. Teti3R.C. Manta4N.B. Lima5H.C.B. Nascimento6S. Fucale7N.B.D. Lima8Brazilian Institute for Material Joining and Coating Technologies (INTM), Federal University of Pernambuco, Recife 50740-540, Brazil; Polytechnic School, University of Pernambuco, Recife 50720-001, Brazil; Corresponding author at: Brazilian Institute for Material Joining and Coating Technologies (INTM), Federal University of Pernambuco, Recife 50740-540, Brazil.Brazilian Institute for Material Joining and Coating Technologies (INTM), Federal University of Pernambuco, Recife 50740-540, Brazil; Polytechnic School, University of Pernambuco, Recife 50720-001, BrazilBrazilian Institute for Material Joining and Coating Technologies (INTM), Federal University of Pernambuco, Recife 50740-540, Brazil; Department of Fundamental Chemistry, Federal University of Pernambuco, Recife 50740-560, BrazilBrazilian Institute for Material Joining and Coating Technologies (INTM), Federal University of Pernambuco, Recife 50740-540, BrazilBrazilian Institute for Material Joining and Coating Technologies (INTM), Federal University of Pernambuco, Recife 50740-540, BrazilBrazilian Institute for Material Joining and Coating Technologies (INTM), Federal University of Pernambuco, Recife 50740-540, Brazil; Department of Mechanical Engineering, Federal University of Pernambuco, Recife 50740-540, Brazil; Corresponding author at: Brazilian Institute for Material Joining and Coating Technologies (INTM), Federal University of Pernambuco, Recife 50740-540, Brazil.Brazilian Institute for Material Joining and Coating Technologies (INTM), Federal University of Pernambuco, Recife 50740-540, Brazil; Department of Fundamental Chemistry, Federal University of Pernambuco, Recife 50740-560, Brazil; Corresponding authors at: Brazilian Institute for Material Joining and Coating Technologies (INTM), Federal University of Pernambuco, Recife 50740-540, Brazil.Polytechnic School, University of Pernambuco, Recife 50720-001, BrazilBrazilian Institute for Material Joining and Coating Technologies (INTM), Federal University of Pernambuco, Recife 50740-540, Brazil; Department of Fundamental Chemistry, Federal University of Pernambuco, Recife 50740-560, Brazil; Corresponding authors at: Brazilian Institute for Material Joining and Coating Technologies (INTM), Federal University of Pernambuco, Recife 50740-540, Brazil.To minimize the environmental impacts of construction and demolition waste (CDW) generation, it is essential to investigate sustainable materials' chemical and microstructural aspects, such as fine recycled concrete aggregate into cement-based mortars. A comprehensive experimental program was conducted to evaluate workability, compressive strength, and microstructural characteristics, providing insight into sustainable applications in construction. In this sense, the main goal of the present work is to examine the mechanical behavior of mortars produced with CDW due to their potential for introduction into the civil construction market. The mortars were made to evaluate the mechanical behavior and characterization tests of recycled and natural aggregates, consistency index, mass density, resistance to simple compression, x-ray diffraction, and scanning electron microscopy. The results revealed that the grains' maximum characteristic dimension corresponds to 2.36 mm, equivalent to the fine sand used. However, the water absorption of the recycled aggregate was 20.1 %, which is higher than the water absorption of fine sand, which corresponds to 12.5 %. The 1:4 ratio with 30 % replacement content showed better workability and compressive strength of 44.92 MPa. However, the 1:7 ratio showed high consistency rates due to the water-cement ratio. Further, the XRD results revealed diffraction peaks associated with Quartz, Portlandite, and Ettringite phases, corroborating the technical feasibility of using CDW. Finally, high partial replacements of fine natural aggregate by fine recycled concrete aggregate have technical and sustainable. This work highlights its potential to reduce construction costs and environmental impact, contributing to the circular economy.http://www.sciencedirect.com/science/article/pii/S2949822825000322Construction and demolition wasteRecycled aggregateMortarMicrostructural characteristics |
| spellingShingle | M.L. Peixoto S.D. Jesus H.S. Cavalcante B.S. Teti R.C. Manta N.B. Lima H.C.B. Nascimento S. Fucale N.B.D. Lima Impacts of high CDW levels on the chemical, microstructural, and mechanical behavior of cement-based mortars Next Materials Construction and demolition waste Recycled aggregate Mortar Microstructural characteristics |
| title | Impacts of high CDW levels on the chemical, microstructural, and mechanical behavior of cement-based mortars |
| title_full | Impacts of high CDW levels on the chemical, microstructural, and mechanical behavior of cement-based mortars |
| title_fullStr | Impacts of high CDW levels on the chemical, microstructural, and mechanical behavior of cement-based mortars |
| title_full_unstemmed | Impacts of high CDW levels on the chemical, microstructural, and mechanical behavior of cement-based mortars |
| title_short | Impacts of high CDW levels on the chemical, microstructural, and mechanical behavior of cement-based mortars |
| title_sort | impacts of high cdw levels on the chemical microstructural and mechanical behavior of cement based mortars |
| topic | Construction and demolition waste Recycled aggregate Mortar Microstructural characteristics |
| url | http://www.sciencedirect.com/science/article/pii/S2949822825000322 |
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