Use of dry sludge from waste water treatment plants as an additive in prefabricated concrete brick

Authors

  • A. Yagüe Dept. Ingeniería de la Construcción, Universitat Politècnica de Catalunya, ETSECCPB
  • S. Valls Dept. Ingeniería de la Construcción, Universitat Politècnica de Catalunya, ETSECCPB
  • E. Vázquez Dept. Ingeniería de la Construcción, Universitat Politècnica de Catalunya, ETSECCPB
  • V. Kuchinow UBENA, BBS, S.L

DOI:

https://doi.org/10.3989/mc.2002.v52.i267.324

Keywords:

dry sludge, waste water, prefabricated concrete, physical properties, mechanical properties, environmental impact, leaching

Abstract


Dry sludge from the Sabadell Water Treatment Plant was used to prepare prefabricated concrete bricks. After characterising the sludge and the manufacturing process used to make the bricks, we define the conditions of addition of the sludges in the manufacture. Reference samples not containing sludge and samples containing 2 % of dry sludge by cement weight were prepared. The variation in density, porosity, absorption coefficient and compressive strength of the bricks with the presence of sludge was determined over time. Leaching of the bricks was determined according to the NEN 7345 standard. In most cases the addition of sludge produces a decrease in porosity and absorption coefficients and an increase in compressive strength, so one could expect these bricks to have greater durability. As regards leaching pollutants in the bricks, they are below the limit of the Dutch NEN standard for construction materials and thus can be classified as inert material.

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Published

2002-09-30

How to Cite

Yagüe, A., Valls, S., Vázquez, E., & Kuchinow, V. (2002). Use of dry sludge from waste water treatment plants as an additive in prefabricated concrete brick. Materiales De Construcción, 52(267), 31–41. https://doi.org/10.3989/mc.2002.v52.i267.324

Issue

Section

Research Articles