Knowledge Agora

Title	Construction and Demolition Waste (CDW) Recycling-As Both Binder and Aggregates-In Alkali-Activated Materials: A Novel Re-Use Concept
ID_Doc	7841
Authors	Robayo-Salazar, RA; Valencia-Saavedra, W; de Gutiérrez, RM
Title	Construction and Demolition Waste (CDW) Recycling-As Both Binder and Aggregates-In Alkali-Activated Materials: A Novel Re-Use Concept
Year	2020
Published	Sustainability, 12, 14
Abstract	This article demonstrates the possibility of producing alkali-activated materials (AAM) from a mixture of mechanically processed concrete, ceramic, masonry, and mortar wastes, as a sustainable alternative for recycling construction and demolition wastes (CDWs) under real conditions. The addition of 10% Portland cement allowed the materials to cure at room temperature (25 degrees C). CDW binder achieved a compressive strength of up to 43.9 MPa and it was classified as a general use and low heat of hydration cement according to ASTM C1157. The concrete produced with this cement and the crushed aggregates also from CDW reported a compressive strength of 33.9 MPa at 28 days of curing and it was possible to produce a high-class structural block with 26.1 MPa according to ASTM C90. These results are considered one option in making full use of CDWs as binder and aggregates, using alkaline activation technology thereby meeting the zero-waste objective within the concept of the circular economy.
PDF

Similar Articles

ID	Score	Article
10039		Mejía-de-Gutiérrez, R; Robayo-Salazar, R; Valencia-Saavedra, W Construction and demolition waste as raw material for concrete and construction elements obtained through alkaline activation(2023)Revista De La Academia Colombiana De Ciencias Exactas Fisicas Y Naturales, 47.0, 184
26379		Kryvenko, P; Rudenko, I; Sikora, P; Sanytsky, M; Konstantynovskyi, O; Kropyvnytska, T Alkali-activated cements as sustainable materials for repairing building construction: A review(2024)
7891		Frías, M; Martínez-Ramírez, S; de la Villa, RV; Fernández-Carrasco, L; García, R Reactivity in cement pastes bearing fine fraction concrete and glass from construction and demolition waste: Microstructural analysis of viability(2021)
16027		García-Díaz, A; Delgado-Plana, P; Bueno-Rodríguez, S; Eliche-Quesada, D Investigation of waste clay brick (chamotte) addition and activator modulus in the properties of alkaline activation cements based on construction and demolition waste(2024)
6276		Juan-Valdés, A; Rodríguez-Robles, D; García-González, J; Gómez, MISD; Guerra-Romero, MI; De Belie, N; Morán-del Pozo, JM Mechanical and microstructural properties of recycled concretes mixed with ceramic recycled cement and secondary recycled aggregates. A viable option for future concrete(2021)
19685		Shivaprasad, KN; Yang, HM; Singh, JK A path to carbon neutrality in construction: An overview of recent progress in recycled cement usage(2024)
19007		Li, YL; Yuan, Q; Li, JB Calcined Cutter Soil Mixing Residue-Based Alkali-Activated Cement: Compressive Strengths, Reaction Products, and Sustainability(2022)Acs Sustainable Chemistry & Engineering, 10.0, 1
8679		Al-Janabi, A; Black, L; Adu-Amankwah, S Improvement of Recycled Cement Powder Characteristics from C&DWastes by Accelerated CO₂ Curing and/or Heat Treatment(2024)
22133		Joseph, AM; Matthys, S; De Belie, N Properties of Concrete with Recycled Aggregates Giving a Second Life to Municipal Solid Waste Incineration Bottom Ash Concrete(2022)Sustainability, 14.0, 8
12270		Cantero, B; del Bosque, IFS; Matías, A; de Rojas, MIS; Medina, C Inclusion of construction and demolition waste as a coarse aggregate and a cement addition in structural concrete design(2019)Archives Of Civil And Mechanical Engineering, 19.0, 4