Title:
Incorporating Recycled Glass Fiber into MgO/Slag-based Mortar
Author(s):
Mohamed Wendlassida Kaboré, Youssef El Bitouri
Publication:
Symposium Paper
Volume:
370
Issue:
Appears on pages(s):
11-24
Keywords:
Recycled Glass Fiber-Reinforced Polymer (rGFRP), mechanical strength, toughness, shrinkage, MgO-slag binder
DOI:
10.14359/51751744
Date:
5/1/2026
Abstract:
The recycling of glass fiber-reinforced polymer (rGFRP) into cementitious materials appears to be a promising solution. This paper examines the effect of recycled glass fiber-reinforced polymer (rGFRP) from wind turbine blades on the mechanical properties of magnesium oxide (MgO)-activated ground granulated blast furnace slag (GGBFS) mortars. rGFRP larger than 2 mm was incorporated into the mortar at 3% and 5% (%wt). The results show that incorporating rGFRP slightly reduced the workability of the mortar. In terms of porosity, no significant effect was observed with the addition of rGFRP. Compressive strength was slightly improved, reaching 17.3 MPa with 5% rGFRP, while flexural strength remained unaffected. The main benefit of incorporating rGFRP is improving the flexural toughness, which can be interesting in some applications. In addition, the results highlight a reduction of autogenous shrinkage with the incorporation of rGFRP. SEM observations show good bonding between the rGFRP and the matrix, with some tearing of the rGFRP after the flexural test.
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