Influence of anti-washout admixtures on the strength and microstructural characteristics of geopolymer concrete

被引：0
作者：
Bellum R.R. [1 ]
机构：
[1] Department of Civil Engineering, Aditya Engineering College (Autonomous), Aditya Nagar, ADB Road, East-Godavari District, Surampalem, 533437, Andhra Pradesh
来源：
Journal of Building Pathology and Rehabilitation | 2021年 / 6卷 / 1期
关键词：
Anti-washout admixtures; Compressive strength; Fly ash; Geopolymer concrete; GGBFS; Microstructure;
D O I：
10.1007/s41024-021-00129-y
中图分类号：
学科分类号：
摘要：
Recent investigations proved that geopolymers produced with different industrial by-products have shown superior mechanical and microstructural performances compared to ordinary Portland cement (OPC) concrete. This study investigates the effectiveness of using different anti-washout admixtures (AWAs) to produce geopolymer concrete (GC) based underwater concrete (UWC). Two different AWAs were used in the present study i.e. Arabic gum (AG) and xanthan gum (XG). However, in the fabrication of GC two types of industrial by-products were used such as fly ash (FA) and ground granulated blast furnace slag (GGBFS). The influence of GC mixes in UWC was assessed in terms of workability, washout resistance, compressive strength, bleeding capacity and microstructural characteristics. The results indicate that among all GC samples, AG based mixes are most suitable for AWAs in the production of UWC. Moreover, enhanced compressive strength and better anti-washout resistance was observed in case of AG based UWC samples as compared to XG samples. The UWC based GC showed an enhanced compressive strength of 54.73 MPa with the addition of 0.5% Arabic gum. The XRD, SEM and EDS analysis revealed the better formation of geopolymerization products in UWC mixes produced with AG. © 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG.
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