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

Thiago A. Hemkemeier, Fernando C.R. Almeida, Almir Sales, Agnieszka Klemm

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

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.
Original languageEnglish
Title of host publicationInternational Conference on Concrete Repair, Rehabilitation and Retrofitting
EditorsM. G. Alexander, H. Beusahausen, F. Dehn, J. Ndawula, P. Moyo
PublisherMATEC Web of Conferences
Number of pages6
DOIs
Publication statusPublished - 5 Oct 2022
EventInternational Conference on Concrete Repair, Rehabilitation and Retrofitting - Cape Town, South Africa
Duration: 3 Oct 20225 Oct 2022
https://iccrrr2022.org/ (Link to conference website)

Conference

ConferenceInternational Conference on Concrete Repair, Rehabilitation and Retrofitting
Abbreviated titleICCRRR 2022
Country/TerritorySouth Africa
CityCape Town
Period3/10/225/10/22
Internet address

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