SOME Strategies for Reusing Residues from Waste Water Treatment Plants: Preparation of Binding Materials

Title: SOME Strategies for Reusing Residues from Waste Water Treatment Plants: Preparation of Binding Materials
Author(s): Monzó
Paper category : conference
Book title: International RILEM Conference on the Use of Recycled Materials in Building and Structures
Editor(s): E. Vázquez, Ch. F. Hendriks and G.M.T. Janssen
Print-ISBN: 2-912143-52-7
e-ISBN: 2912143756
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 814 - 823
Total Pages: 10
Nb references: 18
Language: English

Abstract: Some aspects on the reusing of sewage sludge pellets (SSP) obtained from drying
sludge process and on the reusing of sewage sludge ash (SSA), obtained from
incineration of wastewater sludges, in building materials manufacturing have been
studied
In the first place, the possibility of the reuse of sewage sludge pellets (SSP) in the
concrete manufacturing for pavements is analyzed. Some problems related to setting
process and mechanical strength development of concrete have been studied. The
replacement of sand 6.1% by SSP (dried weight) and the addition of hardening
acceleration agent to the mixture let to obtain concrete with similar strength
characteristics than plain control concrete.
Secondly, the use of SSP as substituting material in raw mix formulation in Portland
cement manufacturing has been studied. It has been demonstrated the feasibility of the
replacing of limestone with the addition of 11% (dried mater) SSP in raw mix with
minimal changes in the dosage of the other components of the raw.
In third place, the pozzolanic behaviour of the sewage sludge ash (SSA) has been
investigated, attending to the study of lime fixation by thermogravimetric techniques in
cement/SSA pastes and by the development of mechanical strength of cement/SSA
mortars. Also, the effect of the ash on the setting of cement pastes has been studied.
Experimental results showed the feasibility of the partial replacement (15 and 30%) of
cement by SSA in mortars. On the other hand, the sewage sludge ash/ fly ash mixture
has been investigated, as an alternative to improve the properties of Portland cement
concrete containing SSA.

Online publication: 2004-09-29
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143756.090