Title:
Performance Evaluation of Using Waste Glass Powder and Fly Ash in Alkali-Activated Slag Binder and Mortar Samples as Partial Precursors
Author(s):
Qingli (Barbara) Dai
Publication:
Web Session
Volume:
ws_F23_QingliDai.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
10/29/2023
Abstract:
Recycled glass power can be used to as a partial precursor in alkali‐activated slag (AAS) cement binder. The municipal glass power was processed with sizes of 30‐50 μm and applied with 15% and 20% replacement ratio of slag cement for AAS sample preparation. To increase the usage of recycled glass particles, the AAS mortar was then prepared by extending glass powder modified AAS binder and applying 25% glass particles in sieving size #8‐#16. The recycled tire steel fibers (RSF) were also used in the AAS mortar as enforcement. The results showed the glass powder modified AAS binder has comparable compressive strength and early‐stage shrinkage deformation with limited reduction. The applied glass particles in mortar samples showed slightly reduced compressive strength and also reduced shrinkage deformation. Finally, the RSF reinforcement in glass powder and particle modified AAS mortar can largely improve the compressive, tensile and flexural strength. The magnetic polar interaction between the recycled tire steel fibers and slag cement lead to strong bonding behavior and thus contributes to the strength improvement. These results can facilitate the recycling of municipal glass power and particles in AAS binder and mortar, and also demonstrate that the added tire steel fibers can largely improve the fracture strength and properties of AAS mortar.