Repair mortars with water treatment plant sludge (WTPS) and sugarcane bagasse ash sand (SBAS) for more eco-efficient and durable constructions

被引：12

作者：

Hemkemeier, Thiago A. ^{[1
]}

Almeida, Fernando C. R. ^{[2
]}

Sales, Almir ^{[1
]}

Klemm, Agnieszka J. ^{[3
]}

机构：

[1] Univ Fed Sao Carlos, Dept Civil Engn, Via Washington Luis,km 235, BR-13565905 Sao Carlos, SP, Brazil

[2] Univ Fed Minas Gerais, Dept Mat Engn & Construction, Ave Presidente Antonio Carlos,6627, BR-31270901 Belo Horizonte, MG, Brazil

[3] Glasgow Caledonian Univ, Sch Comp Engn & Built Environm, Cowcaddens Rd, Glasgow G4 0BA, Scotland

来源：

JOURNAL OF CLEANER PRODUCTION | 2023年 / 386卷

关键词：

Corrosion; Water treatment plant sludge; Sugarcane bagasse ash sand; Durability; CONCRETE; CEMENT; CORROSION; WASTE; CARBONATION;

D O I：

10.1016/j.jclepro.2022.135750

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Water treatment plant sludge (WTPS) and sugarcane bagasse ash sand (SBAS) can be used as fine aggregate in cementitious composites. This paper aims to evaluate carbonation depth, chloride penetration, steel corrosion probability, and corrosion rate of cementitious repair mortars produced with 3% WTPS and 30% SBAS. The results showed SBAS mortars have the best performance in relation to carbonation and chloride penetration tests. WTPS mortars have similar results to the reference sample. Both mixes with by-products were able to provide a more protective environment for steel reinforcement. They presented a delayed steel corrosion probability of 25% (for 3WTPS) and 113% (for 30SBAS) in comparison to the reference sample. This is due to increased alkalinity and refinement of pores given by incorporation of fine waste materials. Moreover, 3WTPS and 30SBAS can significantly reduce corrosion rates of steel reinforcement in the order of 70% and 97%, respectively. Therefore, 3WTPS and 30SBAS composites can be satisfactory used in jacketing repair mortars for more eco-efficient and durable constructions.

引用

页数：12