Valuation of sewage sludge ash as a component of precast concrete

  • F. Baeza Brotons Departamento de Ingeniería de la Construcción, Universidad de Alicante, España.
  • P. Garcés Terradillos Departamento de Ingeniería Civil, Universidad de Alicante, Carretera de San Vicente del Raspeig S/N, España
  • J. Payá Bernabeu Instituto de Ciencia y Tecnología del Hormigón (ICITECH), Universitat Politècnica de València, España
  • O. Galao Malo Departamento de Ingeniería Civil, Universidad de Alicante, España
Keywords: sustainability, industrial products, mineral additions

Abstract

This paper proposes binary and ternary combinations of sewage sludge ash (SSA) with fly ash, marble dust and rice hull ash, as partial replacement or addition relative to Portland cement in concretes with a similar dosage to that used in the manufacture of precast blocks, with very dry consistency given its manufacturing process in plant. Several physical-mechanical tests were carried out on concrete and mortar specimens with curing ages of 28 and 90 days: density, water absorption and compressive strength. It is proved that replacing cement by SSA involves a decrease in density and compressive strength compared to the reference sample, however, the combinations of residues significantly improve the characteristics of the cementitious materials. The addition of SSA provided densities and resistances similar to the control sample and significantly reduces the water absorption.

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Published
2015-01-30
How to Cite
Baeza Brotons, F., Garcés TerradillosP., Payá Bernabeu, J., & Galao Malo, O. (2015). Valuation of sewage sludge ash as a component of precast concrete. Revista ALCONPAT, 5(1), 44 - 57. https://doi.org/10.21041/ra.v5i1.76
Section
Applied Research