Preliminary Study of Hot Mix Asphalt Containing Water Treatment and Sewage Sludge

Throughout the world, considerable quantities of water treatment sludge (WTS) and sewage sludge (SS) are produced as waste. This study assessed in the laboratory, the possibility to use both waste products when they are incorporated as filler at 1% with relation to the total mass of a hot mix asphal...

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Bibliographic Details
Published inArchives of civil engineering Vol. 66; no. 1; pp. 225 - 240
Main Authors Bastidas-Martínez, J G, Camapum De Carvalho, J, Lucena, L C, Farias, M M, Rondón-Quintana, H A
Format Journal Article
LanguageEnglish
Published Warsaw De Gruyter Poland 01.01.2020
Polish Academy of Sciences
Subjects
Abrasion resistance
Asphalt
Cyclic loads
Damage
Fillers
Friction resistance
Frictional wear
hot mix asphalt
mineral filler
Moisture effects
Moisture resistance
Sewage sludge
Sludge
Stiffness
Tension tests
Variance analysis
Water treatment
water treatment sludge
Wear resistance
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Summary:Throughout the world, considerable quantities of water treatment sludge (WTS) and sewage sludge (SS) are produced as waste. This study assessed in the laboratory, the possibility to use both waste products when they are incorporated as filler at 1% with relation to the total mass of a hot mix asphalt - HMA. To this end, both waste products were initially reduced to ash through a calcination process. Resistance tests under monotonic load (Marshall and indirect tension tests), and cyclic load (resilient modulus test) were applied on mixes that contained WTS and SS. Besides, moisture damage (modified Lotmman test), and abrasion (Cantabro) resistance were assessed. An analysis of variance (ANOVA) test was performed in order to verify if the results are statically equal or not to those of the control HMA. As a general conclusion, it is reported that both materials show a resistance increase under monotonic load and higher stiffness under cyclic load (cohesion) when they are incorporated into the mix as filler despite the fact that the asphalt content used was less than the control mix. However, some problems are observed associated with moisture damage resistance, and friction wear (adherence).
ISSN:1230-2945
2300-3103
DOI:10.24425/ace.2020.131785