Guidelines for assessing the valorization of a waste into cementitious material: dredged sediment for production of self compacting concrete

Abstract

This article presents some guidelines in order to analyse the feasibility of including a waste material in the production of a structural cementitious material. First of all, the compatibility of the waste with a cementitious material has to be assured; then, if necessary, a decontamination step will be carried out; after, decision on the type of material has to be taken based on different aspects, with special emphasis on the granulometry. As a last step, mechanical, environmental and durability properties have to be evaluated. Then the procedure is illustrated with a full example, obtaining a self compacting concrete (SCC) including dredged sediment taken from a Spanish harbour. RESUMEN:Directrices para evaluar la puesta en valor de un residuo en la fabricación de un material base cemento: producción de hormigón autocompactante a partir de sedimentos dragados. Este artículo presenta algunas directrices con el fin de analizar la posibilidad de incluir un material de desecho en la producción de un material base cemento estructural. En primer lugar, debe asegurarse la compatibilidad de los residuos con el material base cemento. Tras ello, si es necesario, se llevará a cabo la etapa de descontaminación del residuo. Después debe tomarse la decisión sobre el tipo de material a utilizar en base a diferentes aspectos, haciendo especial énfasis en la granulometría. Como último paso, deben evaluarse las propiedades mecánicas, ambientales y de durabilidad del producto final. El procedimiento a seguir se ilustra con un ejemplo concreto basado en la obtención de un hormigón autocompactante (SCC) incluyendo en su fabricación sedimentos dragados tomados de un puerto español.

Portland blended cements: demolition ceramic waste management

“…Since CB, MB and SW have similar reactivity and considering the replacement level (8,24 and 40% w/w) by ceramic waste, in general, the emission in 72, 216 and 360 g CO 2 / kg cement could be reduced, respectively. Portland blended cements: demolition ceramic waste management • 7 In 2014, according to the Association of Portland Cement Manufacturers in Argentina (AFCP) (31), 11,438,165 t of cement were exported to the domestic market.…”

Improving the Properties of Self-compacted Concrete with Using Combined Silica Fume and Metakaolin

“…In fact, Silica fume (SF) increases the cement cohesion and compressive resistance because it has a higher specific surface than metakaolin and cement, other studies confirmed these results and indicated that the use of metakaolin and Silica fume (SF) could increase the compressive resistance [9,[15][16][17]. Several experimental researches were conducted in recent years to investigate the effect of regular, volcanic, waste aggregate materials on different properties of self-compacted concrete [18][19][20][21]. Although there are acceptable studies about Silica fume (SF) and metakaolin, but there is only limited studied about the use of both of them simultaneously.…”

Effects of waste sulfur content on properties of self-compacting concrete

“…Beside economic, there are also important environmental benefits by using industrial by-products. Also, data regarding the use of waste and cementitious materials in SCC was analyzed in previous study, show that industrial waste is among the most prominent (15). Namely, the design of SCC allows usage of industrial and building wastes in case of producing SCC with the same or better engineering properties (6,14,16,17), while the purpose of using powdered waste industrial residues is to ensure sustainable production of SCC and to produce "green concrete" (6,(18)(19)(20)(21).…”