The influence of alkali-resistant glass fibres on properties of fine-aggregate concretes

Abstract

The aim of this paper is to assess the effect of modification of fine-aggregate concrete properties with zirconia alkali-resistant glass fibres. Three types of fine-aggregate composites were subject to tests: normal-weight concretes made of natural sand, non-foamed and foamed lightweight concretes made of expanded glass aggregate. The concretes were modified with the glass fibres mainly in quantities ranged from 1.0 to 5.0 kg/m3. Even such low contents resulted in the increase of both flexural and compressive strength, by up to 45 % and 26 %, respectively. In the case of normal-weight fine-aggregate concretes the applied glass fibres turned out to be especially effective in improvement of the properties in early ages. At the age of 28 days both types of concretes revealed similar percentage strength increase. In comparison to HP 12 mm the application of longer fibres (HP 24 mm) led to slightly higher results of flexural strength tests. On the other hand, the shorter fibres were definitely more effective in the improvement of compressive strength due to their greater number and more uniform dispersion in concrete volume. The used contents of alkali-resistant glass fibres did affect neither density nor water absorption of the hardened concretes.

Mechanical and Durability Performances of Alkali-resistant Glass Fiber-reinforced Concrete

“…This leads to alkali-resistant glass fibers which came into prominence and are now widely used in construction. These fibers have been reported to have increased the split tensile strength and wear resistance of the composite (Domagała et al, 2019;Sivakumar & Santhanam, 2007;Zhu et al, 2019).…”

Properties of Alkali-Resistant Glass Fiber Reinforced Coral Aggregate Concrete

“…Thus, alkali-resistant glass fibers (ARGF) are produced and widely used in construction materials. Incorporating ARGFs can significantly increase the splitting tensile strength [32][33][34][35][36][37], modulus of rupture [32][33][34][35][36][37], flexural toughness [32], and wearing resistance of concrete [33] if no agglomeration of fibers occurs. Crack initiations and propagations are much suppressed, and the maximum crack width and length are reduced [32,35,38].…”