Abstract
The possibility of recycling waste from medium density fiberboard (MDF) production into wood-cement composites was evaluated. A large quantity of lignocellulosic wastes is generated worldwide from various sources, including wood and furniture industries, leading to environmental concerns. Medium density fiberboard (MDF) is an engineered wood product, which is made from wood fibers (mainly form coniferous trees) with wax and a resin binder. This paper presents an experimental study which investigated the potential utilization of medium density fiberboard wastes (MDFW) for producing lightweight insulation concrete. The wastes were screened on #8 mm sieve to exlude big irregular elements which could negatively affect compaction and strength properties. All lignocellulosic substrates have detrimental effects on cement setting so different techniques were applied to offset the retarding effect of compounds like sugar and tannin present in the bio-based particles before mixing the wastes with cement. One type of cement CEM I 42,5 R was used in the experiment. Flexural strength, compressive strength in air-dry and wet states, and water absorption of lightweight concrete were tested. Compressive strength ranging from 0,5 to 5.3 MPa was obtained depending on the material used for the initial impregnation of MDFW fibers.
Highlights
Lignocellulosic materials are obtained from wood and other plants
This paper presents the outcomes from a tentative research on the development of a lightweight cement composite with the pre-treated Medium density fiberboard (MDF) wastes (MDFW) as an organic aggregate
The weighed medium density fiberboard wastes (MDFW) portions were thoroughly mixed with water or particular solutions in the standard mixer for mortars and than they were tightly covered with foil to avoid water loss by evaporation
Summary
Lignocellulosic materials are obtained from wood and other plants. They are mainly composed of lignin and cellulosic compounds. Various human activities are the source of large amounts of lignocellulosic wastes, which could be utilized in making cement-bonded construction materials instead of their disposal. This type of wastes have a number of suitable properties such as low density, low thermal conductivity, low requirements of processing equipment. The retarding effects of woods and other plant materials on cement setting is caused among others by soluble sugars, hemicelluloses, condensed tannins and gallotannins [1, 2, 3]
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