Effect of fineness of ash on pozzolanic properties and acid resistance of sugarcane bagasse ash replaced cement mortars  

作　　者：Shan E ALI Rizwan AZAM Muhammad Rizwan RIAZ Mohamed ZAWAM 

机构地区：[1]Department of Civil Engineering,University of Engineering&Technology Lahore,Lahore 54890,Pakistan [2]Faculty of Engineering,Cairo University,Cairo 12613,Egypt

出　　处：《Frontiers of Structural and Civil Engineering》2022年第10期1287-1300,共14页结构与土木工程前沿（英文版）

摘　　要：This paper addresses the potential use of Sugar Cane Bagasse Ash(SCBA)as a pozzolanic material for partial cement replacement in concrete mixtures.Cement mortars containing SCBA having five different particle size distributions at a replacement rate of 20%by weight were used to study the chemical and physical pozzolanic properties of SCBA.The durability of SCBA replaced mortars was also evaluated.SCBA with 0%retained on sieve No.325 was used to replace 20%by weight of cement and create mortar specimens that were subjected to sulfuric acid attack of varying concentrations(1%–3%by weight of water).The tested samples were observed to check visual distortion,mass loss,and compressive strength loss at 1,7,14,28,and 56 d of acidic exposure,and the results were compared to those for the control sample,that was lime water cured,at the same ages.The SCBA sets were found to meet the requirements for pozzolan class N specified by ASTM C 618.Mortars containing SCBA with 0%or 15%retention produced better compressive strength than the control mortars after 28 d.Additionally,X-ray fluorescence and X-ray diffraction analysis showed that the SCBA had favorable chemical properties for a pozzolanic material.Furthermore,SCBA replaced samples at all ages showed improved resistance against acidic attack relative to that of the control mortars.Maximum deterioration was seen for 3%concentrated solution.This study’s findings demonstrated that SCBA with an appropriate fineness could be used as a pozzolanic material,consistently with ASTM C 618.

关 键 词：durability cement replacement sugarcane bagasse ash fineness of ash pozzolanic properties mortar acid resistance 

分 类 号：TU578.1[建筑科学—建筑技术科学]