Evaluation Of Anti-mold Effect Of Preservatives And Treatment Methods On Strand Woven Bamboo Lumber Made Of Neosinocalamus Affinis

Strand woven bamboo lumber samples made by Neosinocalamus affinis, asympodial species, were treated by brushing on the surface, non-pressure dipping,vacuum dipping and heat treatment with ZJFC-I and Huake-108, and the anti-moldeffects of different preservatives and treatments were compared. Leaching resistanceand weathering characteristics of treated samples were measured too. It was aimed tofind suitable preservative and treatment process for maintaining long-term anti-moldeffect of strand woven sympodial bamboo lumber, which could meet therequirements of building elements and outdoor bamboo flooring so as to providebasis anti-mold data for outdoor applications and process reorganization of strandwoven bamboo lumber made by Neosinocalamus affinis.Firstly, anti-mold effects of strand woven bamboo lumber made of sympodialbamboo with different resin soaking contents were studied. Results showed theaverage anti-mold effects of the samples were poor and resin soaking contents hadno obvious effect on inhabiting mold growth, and the distinction of anti-mold effectson different resin soaking contents of the samples was not clear.Secondly, the anti-mold effects of strand woven bamboo lumber samples madeby Neosinocalamus affinis, which were treated by different treatments with ZJFC-Iand Huake-108, two of anti-mold agents with good effect tested by previous tests,were compared and evaluated. Results showed that their mold-resistant efficiencyenhanced with the concentrations of preservatives increased. The averagemold-resistant efficiency of ZJFC-Ⅰ were superior to Huake-108. In addition,biohouse, a anti-ultraviolet oil, could enhance the anti-mold effects of ZJFC-Ⅰ. Theanti-mold effects of samples heated by160℃was superior to samples which werenot heated and heated by190℃when the concentration of mold preservative werein the range of0.3%and1.0%, but the anti-mold effects of samples which were notheated was superior to samples heated by160℃and190℃when the concentrationof mold preservative were in the range of2.0%and3.0%.Thirdly, leaching resistance with different concentrations of ZJFC-Ⅰ were alsostudied. Results showed that fixation of the preservative with higher concentrationswere better than that of lower ones. And in the testing condition, the leaching resistance of the preservative was better when the concentration was above2.0%.Finally, weathering characteristics of the strand woven bamboo lumber made byNeosinocalamus affinis were measured. Exposed outdoors over9months, samplestreated with Huake-108had a better anti-mold effects and less colour changes thanthat of ZJFC-Ⅰ. The internal mildew or decay could be efficiently prevented whensamples treated with Huake-108or ZJFC-Ⅰ.Besides, the chemical compositions ofsamples treated and untreated had different degree of degradation, and thedistinguishing of different treatments was not clear.