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首页> 外文会议>The ninth international inorganic-bonded composite materials conference >The recycling of MDF fiber into wood-cement composites with carbon dioxide injection
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The recycling of MDF fiber into wood-cement composites with carbon dioxide injection

机译：注入二氧化碳将中密度纤维板纤维回收成木水泥复合材料

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摘要

The possibility of recycling medium density fiberboard (MDF) furnish into wood-cement compositesrnwas evaluated. Both virgin wood fiber and recycled MDF fiber had poor compatibility with cementrnif no treatment was applied. However, this problem was solved when a rapid hardening process withrncarbon dioxide injection was adopted. After 3-5 minutes of carbon dioxide injection, the compositesrnreached 22-27% of total carbonation degree and developed 50-70% of their ultimate strength.rnComposites containing recycled MDF fiber had similar strength to those containing virgin woodrnfiber under appropriate production conditions, but had lower toughness values especially at higherrnfiber/cement ratio. Composites containing recycled MDF fiber also had lower water absorptionrnamounts. There was a positive relationship between carbonation degree and strength of compositesrnright after carbon dioxide injection but this relationship was not evident 28 days after carbon dioxiderninjection. Composites subjected to carbon dioxide injection showed better physical and mechanicalrnproperties than those cured conventionally. Unlike composites cured conventionally, carbonatedrncomposites had higher strength and toughness with increased fiber content.
机译：评估了将中密度纤维板（MDF）配料回收为木水泥复合材料的可能性。如果不进行处理，则原始木纤维和再生MDF纤维与水泥的相容性均较差。但是，当采用二氧化碳注入快速硬化工艺时，该问题得以解决。注入二氧化碳3-5分钟后，复合材料达到了总碳酸化度的22-27％，发展了其极限强度的50-70％。rn在适当的生产条件下，含有再生MDF纤维的复合材料的强度与含有原生木纤维的复合材料的强度相近，但具有较低的韧性值，尤其是在较高的纤维/水泥比下。含有再生MDF纤维的复合材料的吸水率也较低。二氧化碳注入后复合材料的碳化程度与强度之间存在正相关关系，但二氧化碳注入后28天这种关系并不明显。经受二氧化碳注入的复合材料比常规固化的那些具有更好的物理和机械性能。与常规固化的复合材料不同，碳酸复合材料具有更高的强度和韧性，且纤维含量更高。

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