Wood preservation for preventing biodeterioration in tropical location

Abstract:

Cross Laminated Timber (CLT) is a construction system based on pre-fabricated solid wood panels. As this system is produced with a natural material, its implementation is associated with the adoption of preventive measures against pathological processes intrinsic to wood, such as biodeterioration. This phenomenon can be defined as undesirable changes in wood elements provoked by living organisms that use wood as food supply. Among these organisms are the microorganisms, as fungi, and insects, as termite and wood-boring beetles. Their developments occur under favorable moisture and temperature circumstances, thus climate conditions are important factors concerning to wood structures durability. The use of CLT panels in tropical climates, must be associated with wood preservation methods to avoid the decay of the structural components. This paper aims to discuss preservation treatment applied to CLT panels in tropical locations, comparing the standards adopted in different countries where CLT buildings are used. Additionally a case study was conducted. Hence, samples of Pinus sp. from the south region of Brazil and treated with CCB (copper, chromium and boron solution) were tested to identify the penetration and retention of the preservation product. The tests followed the method suggested by the Brazilian standard ABNT NBR 6232:2013. The results showed that it is necessary to establish the quality control to avoid CLT production with no adequate wood protection against xilophagous organisms.


Reference:
OLIVEIRA, Gabriela Lotufo; OLIVEIRA, Fabiana Lopes de; BRAZOLIN, Sergio. Wood preservation for preventing biodeterioration in tropical location. In: INTERNATIONAL CONFERENCE ON BUILDING PATHOLOGY AND CONSTRUCTION REPAIR, CINPAR, 14., 2018, Firenze-Italy. Proceedings… 9 p.

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