Investigating the erosion resistance of cement-bentonite barrier material using hole erosion test

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This research aims to understand the erodibility of Cement-Bentonite Barrier (CBB) using Hole Erosion Test (HET). Past studies on CBB erodibility did not provide adequate characterisa-tion mainly due to method and apparatus used in the testing. Two types of CBB mixes cured for 7, 30 and 90 days investigated in the study: CBB with Fly Ash (FA) and/or ground granulated blast furnace (GGBS). Two key parameters were used to evaluate CBB erodibility: hydraulic shear stress and erosion rate. It was discovered that the improvement of the erosion resistance of CBB was dependent on the curing duration and material mixes. The critical hydraulic shear stress increased and erosion rate decreased with curing time. The critical hydraulic shear stress was higher and the erosion rate was lower for CBB material containing GGBS than PFA. The improvement rate of the erosion resistance was more significant at the early stage of curing than the later stage.

Details

Original languageEnglish
Title of host publicationScour and Erosion IX - Proceedings of the 9th International Conference on Scour and Erosion, ICSE 2018
EditorsYeh Keh-Chia
Publication statusPublished - 10 Oct 2018
Event9th International Conference on Scour and Erosion, ICSE 2018 - Taipei, Taiwan, Province of China
Duration: 5 Nov 20188 Nov 2018

Conference

Conference9th International Conference on Scour and Erosion, ICSE 2018
CountryTaiwan, Province of China
CityTaipei
Period5/11/188/11/18