Softwood surface compatibility with inorganic geopolymer

Research describes softwood – pine (Pinus sylvestris L.) and spruce (Picea abies [L.] Karst) and hardwood – birch(Betula pendula Roth) binding with inorganic geopolymer binder, the main focus is on the softwood and geopolymerbinding principles. Geopolymer binder is formed from calcined clay and liquid glass. The research describesgeopolymer binder compositions with various ratios of liquid glass and clay. This research focuses on mechanicalstrength of bonded wood samples in shear test and on visualization of binder in three dimensions using X-ray computed tomography with submicron resolution. The scan results are compared with mechanical strength test results. The resultsof the research shows, that inorganic binder with spruce wood can achieve 7 MPa shear strength. The research describes binding principles that function between wood and geopolymer and explains the main reasons for destruction of joint. Copyright © 2017 VBRI Press.