In sugar industries,the growing amount of sugarcane bagasse ash(SBA),a byproduct released after burning bagasse for producing electricity,is currently causing environmental pollution.The residual ash displays a pozzolanic potential;and hence,it has potential as a cement addictive.This study focuses on enhancing suitability of SBA through incorporating ground blast furnace slag(BFS)in manufacturing self-compacting concretes(SCCs).For this purpose,SBA was processed by burning at 700℃for 1 h,before being ground to the cement fineness of 4010 cm2/g.SCC mixtures were prepared by changing the proportions of SBA and BFS(i.e.,10％,20％,and 30％)in blended systems;and their performance was investigated.Test results showed that the presence of amorphous silica was detected for the processed SBA,revealing that the strength activity index was above 80％.The compressive strength of SCC containing SBA(without BFS)could reach 98％-127％of that of the control;combination of SBA and 30％BFS gets a similar strength to the control after 28 d.Regarding durability,the 10％SBA+30％BFS mix exhibited the lowest risk of corrosion.Moreover,the joint use of SBA and BFS enhanced significantly the SCC's sulfate resistance.Finally,a hyperbolic formula for interpolating the compressive strength of the SBA-based SCC was proposed and validated with error range estimated within±10％.

Sustainable Developments in Civil Engineering Research Group,Faculty of Civil Engineering,Ton Duc Thang University,Ho Chi Minh City 700000,Vietnam;Department of Civil Engineering,Kaohsiung University of Science and Technology,Kaohsiung 80778,China;Department of Civil Engineering,Lac Hong University,Bien Hoa 810000,Vietnam

[1]Duc-Hien LE;Yeong-Nain SHEEN;Khanh-Hung NGUYEN-.Enhancing compressive strength and durability of self-compacting concrete modified with controlled-burnt sugarcane bagasse ash-blended cements)[J].结构与土木工程前沿,2022(02):161-174

fineness,SBA+30

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