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A platform for research: civil engineering, architecture and urbanism
Pressure treatment of rubberwood (Heavea brasiliensis) with waterborne micronized copper azole: Effects on retention, copper leaching, decay resistance and mechanical properties
Highlights Efficacy of rubberwood impregnated with MCA was evaluated and compared with CCA. Treated rubberwood exhibited requisite amount of preservative retention. Treated wood showed sharp increase followed by gradual decrease in copper leaching. Except MOR, no deleterious effect was observed on hardness of treated rubberwood. SEM showed small size copper particles in the pits and parenchyma of treated wood. Treated wood exhibited lower weight loss compared to control after exposure to fungi. MCA treatments may be recommended in enhancing durability of perishable timbers.
Abstract This study objective was to investigate the biological efficacy of a commercial dispersion of micronized copper azole (MCA) on plantation grown rubberwood. MCA is a formulation containing micronized copper carbonates and azole, an organic co-biocide. The impact of MCA pressure treatments with various concentrations of the active ingredients and the treatment durations on retentions, leaching rate, mechanical properties and biological performance against brown and white rots were evaluated. Biological performance of MCA treated rubberwood at minimum retention of 2.8 ± 0.3 kg/m3 was found to be comparable to that of chromated copper arsenate (CCA) treatment at 15.1 ± 2.3 kg/m3. Field tests are being conducted to confirm the laboratory findings.
Pressure treatment of rubberwood (Heavea brasiliensis) with waterborne micronized copper azole: Effects on retention, copper leaching, decay resistance and mechanical properties
Highlights Efficacy of rubberwood impregnated with MCA was evaluated and compared with CCA. Treated rubberwood exhibited requisite amount of preservative retention. Treated wood showed sharp increase followed by gradual decrease in copper leaching. Except MOR, no deleterious effect was observed on hardness of treated rubberwood. SEM showed small size copper particles in the pits and parenchyma of treated wood. Treated wood exhibited lower weight loss compared to control after exposure to fungi. MCA treatments may be recommended in enhancing durability of perishable timbers.
Abstract This study objective was to investigate the biological efficacy of a commercial dispersion of micronized copper azole (MCA) on plantation grown rubberwood. MCA is a formulation containing micronized copper carbonates and azole, an organic co-biocide. The impact of MCA pressure treatments with various concentrations of the active ingredients and the treatment durations on retentions, leaching rate, mechanical properties and biological performance against brown and white rots were evaluated. Biological performance of MCA treated rubberwood at minimum retention of 2.8 ± 0.3 kg/m3 was found to be comparable to that of chromated copper arsenate (CCA) treatment at 15.1 ± 2.3 kg/m3. Field tests are being conducted to confirm the laboratory findings.
Pressure treatment of rubberwood (Heavea brasiliensis) with waterborne micronized copper azole: Effects on retention, copper leaching, decay resistance and mechanical properties
Shukla, S.R. (author) / Zhang, J. (author) / Kamdem, D.P. (author)
Construction and Building Materials ; 216 ; 576-587
2019-05-02
12 pages
Article (Journal)
Electronic Resource
English
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