Abstract
This article discusses experimental data on the flexural and compressive strength of Portland cement mortars containing additions or cement replacements consisting in petroleum or coal tar, by-products of the oil and coal industries. The materials studied were two coal (BACA and BACB) and two petroleum (BPP and BPT) tars. The results show that it is feasible to use such materials as a partial replacement for cement in mortar manufacture. This should lead to the design of a new sustainable product that will contribute to lowering the environmental impact of construction materials while at the same time opening up an avenue for the re-use of this type of industrial by-products.
Highlights
Tar, a by-product of the coal and oil industries, can be used to make coal anodes or coke or as carbon fibre precursors, among others (1-3).La brea natural es un subproducto de elevado peso molecular resultante de la destilación del petróleo o del alquitrán de carbón
The results show that it is feasible to use such materials as a partial replacement for cement in mortar manufacture
Parte 3: Determinación de la consistencia del mortero fresco (por la mesa de sacudidas)”. (12) UNE-EN 197-1: “Cemento. Parte 1: Composición, especificaciones y criterios de conformidad de cementos comunes”
Summary
La brea natural es un subproducto de elevado peso molecular resultante de la destilación del petróleo o del alquitrán de carbón. Las breas de petróleo y de alquitrán de carbón están constituidas por una compleja mezcla de hidrocarburos, fundamentalmente aromáticos y heterociclos (4). Estos materiales no habían sido nunca usados como adición para refuerzo de morteros de cemento Portland, contrariamente a las fibras de carbón, que han sido ampliamente estudiadas por las posibilidades que le aportan al hormigón (6-7). En un trabajo previo se ha realizado un estudio comparativo entre morteros fabricados con fibras de carbón y brea de petróleo de alto punto de reblandecimiento (8). Objeto de este estudio, son materiales que pueden ser calificados como subproductos de la industria del carbón o del petróleo
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