Abstract
The aim of this study was to investigate the effect of the knife-incising pretreatment on the surface checks occurrence of red pine heavy timber after drying. The effect of knife-incising was evaluated by comparison with surface checks which occurred in the control and kerfed material. The results revealed that the knife-incising treatment was effective compared with control in the prevention of surface checks, and the effect is similar to that of the kerfing treatment. In addition, the combination of incising and kerfing was most effective in preventing surface checks.
Highlights
IntroductionThe knife-incising treatment was assumed to be the best method to protect the surface from check occurrence by dispersing the stress during the drying
The results revealed that the knife-incising treatment was effective compared with control in the prevention of surface checks, and the effect is similar to that of the kerfing treatment
One specimen selected from each pretreatment condition was used for the measurement of final moisture content and distribution
Summary
The knife-incising treatment was assumed to be the best method to protect the surface from check occurrence by dispersing the stress during the drying. In this study, knife-incising pretreatment was applied, and after drying, the effect of knife-incising on the surface checks occurrence was evaluated by comparison with the surface checks occurred in the control and kerfed material. During drying of heavy timbers surface checks often occur and negatively influence the appearance of the building after construction. Various methods such as high-temperature and low-humidity pretreatment, incising (CO2 laser), and longitudinal kerfing have been tested
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