Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Sustainable approaches for developing concrete and mortar using waste seashell
A comprehensive experimental program was performed to recycle high contents of seashell waste as fine aggregate or cement substitution. This effort strongly contributes toward preserving natural resources and mitigating various toxic substances emitted into the atmosphere during cement manufacturing. The first part of this study was dedicated to study possibility of 100% fine aggregate substitution in mortars and concretes whose mechanical properties are comparable to those made by natural sand. Efficiency of this approach was demonstrated by representing several mortar/concrete compositions. In the second part, 10 types of blended cement, with binary composition of seashell powder (up to 30% by mass) and ordinary Portland cement (OPC), were prepared and their physical/chemical properties were studied in comparison with characteristics of OPC. Mortars made of these blended cements, were produced and their properties including water demand and compressive/flexural strength were characterised. All the blended cements presented 28-day compressive/flexural strength relatively close to that of OPC. Furthermore, incorporation of seashell powder resulted in extending setting times (advantageous for constructing in hot climate), and reducing water demand (beneficial for enhancing mechanical strength) of the mortars. The requirements specified by several standards were extensively used to ensure performance of the proposed sand and cements.
Sustainable approaches for developing concrete and mortar using waste seashell
A comprehensive experimental program was performed to recycle high contents of seashell waste as fine aggregate or cement substitution. This effort strongly contributes toward preserving natural resources and mitigating various toxic substances emitted into the atmosphere during cement manufacturing. The first part of this study was dedicated to study possibility of 100% fine aggregate substitution in mortars and concretes whose mechanical properties are comparable to those made by natural sand. Efficiency of this approach was demonstrated by representing several mortar/concrete compositions. In the second part, 10 types of blended cement, with binary composition of seashell powder (up to 30% by mass) and ordinary Portland cement (OPC), were prepared and their physical/chemical properties were studied in comparison with characteristics of OPC. Mortars made of these blended cements, were produced and their properties including water demand and compressive/flexural strength were characterised. All the blended cements presented 28-day compressive/flexural strength relatively close to that of OPC. Furthermore, incorporation of seashell powder resulted in extending setting times (advantageous for constructing in hot climate), and reducing water demand (beneficial for enhancing mechanical strength) of the mortars. The requirements specified by several standards were extensively used to ensure performance of the proposed sand and cements.
Sustainable approaches for developing concrete and mortar using waste seashell
Edalat-Behbahani, Ali (Autor:in) / Soltanzadeh, Fatemeh (Autor:in) / Emam-Jomeh, Mojtaba (Autor:in) / Soltan-Zadeh, Zahra (Autor:in)
European Journal of Environmental and Civil Engineering ; 25 ; 1874-1893
06.08.2021
20 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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