Carbonation and chloride penetration of repair mortars with water treatment plant sludge and sugarcane bagasse ash sand

Water treatment plant sludge (WTPS) and sugarcane bagasse ash sand (SBAS) (wastes from water treatment and sugar/ethanol industries) can be used as replacements of natural sand in concrete. Thus, this paper aims to evaluate carbonation depth and chloride penetration of cementitious repair mortars pr...

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Bibliographic Details
Published in:MATEC Web of Conferences 2022, Vol.364, p.4011
Main Authors: Hemkemeier, Thiago A., Almeida, Fernando C.R., Sales, Almir, Klemm, Agnieszka J.
Format: Article
Language:English
Subjects:
Accelerated tests
Ashes
Bagasse
Carbonation
Chlorides
Ethanol
Mortars (material)
Penetration tests
Sand
Sludge
Sugarcane
Water treatment
Water treatment plants
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Summary:Water treatment plant sludge (WTPS) and sugarcane bagasse ash sand (SBAS) (wastes from water treatment and sugar/ethanol industries) can be used as replacements of natural sand in concrete. Thus, this paper aims to evaluate carbonation depth and chloride penetration of cementitious repair mortars produced with WTPS and SBAS. Three mortars compositions were analysed: plain reference sample (REF); sample with 3% of WTPS (3WTPS); and sample with 30% of SBAS (30SBAS). They were subjected to tests of accelerated carbonation and immersion in NaCl solution up to 84 days (12 weeks). The results showed that SBAS mortars had the best performance in relation to carbonation and chloride penetration tests. 3WTPS mortars had similar results to the reference sample. This is due to refinement of pores given by incorporation of fine waste materials making it difficult for aggressive agents to penetrate cement matrices. Therefore, 3WTPS and 30SBAS composites can be satisfactorily used in buildings repair services for more sustainable and durable construction.
ISSN:2261-236X
2274-7214
2261-236X
DOI:10.1051/matecconf/202236404011