Investigation of the Influence of Aluminosilicate Adhesives Modified with Magnesite on the Strength Properties of Glued Wood Products

• Published in: Key engineering materials Vol. 986; pp. 53 - 58
• Main Author: Lashchivskiy, Vasyl
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 29.08.2024
• Subjects: Aluminosilicates; Aluminum silicates; Bend strength; Composition; Fire resistance; Magnesite; Magnesium carbonate; Shear strength; Water resistance; Wood products; Fire Test; Magnesite; Glued Wood; Aluminosilicate Adhesive; Strength Properties; Modified Agent
• ISSN: 1013-9826; 1662-9795; 1662-9795
• DOI: 10.4028/p-vZRUP5

The work is devoted to the study of magnesite influence on the strength properties of glued wood products with aluminosilicate adhesive. It they shown that the introduction of magnesite in the composition of aluminosilicate glue in the amount from 0.5 to 1.5 % contributes to an increase in the shear strength along the fibres by 1.57 times compared to the normative requirement (not less than 4 MPa). It we found that the bending strength of glued wood on a toothed spike is 1.4 times higher than the normative (not less than 26 MPa). After fire tests, no destruction of the glue joint on the spike we observed, and the bending strength of the samples increases proportionally to the introduction of magnesite in the glue composition. Water resistance of glue joints on the toothed spike when the samples we kept for 48 hours at the temperature 20 °С is higher than the standard value and increases with the increase of magnesite content in the glue composition. After boiling at the temperature 100 °С for 3 hours the samples containing 1.5 % magnesite meet the normative requirements (3 MPa).