Fig. 1. Cutting model of glulam for each test specimen.
Fig. 2. Chromatograph of mangium tannin extract (a) and tannin resorcinol formaldehyde, TRF (b).
Fig. 3. MALDI mass spectrum of (a) details of the 800-1000 Da range; (b) details of the 1000-2000 Da range.
Fig. 4. The flavonoid units in mangium tannin extract.
Fig. 5. X-ray diffraction patterns of mangium extract (a) and TRF (b).
Table 1. Chromatic photometric absorption bands of mangium tannin extract and TRF
Table 2. MALDI peaks for the mangium tannin extract
Table 3. Physical properties of glulams
Table 4. ANOVA of physical and mechanical properties of glulam
Table 5. Duncan’s test for the physical and mechanical properties of glulam based on wood species
Table 6. Duncan’s test for the physical and mechanical properties of glulam based on adhesive type
Table 7. Mechanical properties of glulams
Table 8. Glulam delamination test
Table 9. Formaldehyde emissions from glulam
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