Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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 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.
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 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.
Carbonation and chloride penetration of repair mortars with water treatment plant sludge and sugarcane bagasse ash sand
Hemkemeier, Thiago A. (Autor:in) / C.R. Almeida, Fernando (Autor:in) / Sales, Almir (Autor:in) / Klemm, Agnieszka (Autor:in) / Alexander, M. G. / Beusahausen, H. / Dehn, F. / Ndawula, J. / Moyo, P.
05.10.2022
Hemkemeier , T A , C.R. Almeida , F , Sales , A & Klemm , A 2022 , Carbonation and chloride penetration of repair mortars with water treatment plant sludge and sugarcane bagasse ash sand . in M G Alexander , H Beusahausen , F Dehn , J Ndawula & P Moyo (eds) , International Conference on Concrete Repair, Rehabilitation and Retrofitting . vol. 364 (2022) , 04011 , MATEC Web of Conferences , vol. 364 (2022) , EDP Sciences , International Conference on Concrete Repair, Rehabilitation and Retrofitting , Cape Town , South Africa , 3/10/22 . https://doi.org/10.1051/matecconf/202236404011
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
DDC:
624
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