Utilization of wastes from medium density fiberboards production as an aggregate for lightweight cement composite

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.

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The study of strength of wood-cement composites based on waste wood

Forestry Engineering Journal ◽

10.12737/14630 ◽

2015 ◽

Vol 5 (3) ◽

pp. 191-199

Author(s):

Филичкина ◽

Maria FilichkinaM ◽

Копарев ◽

Vladimir Koparev

Keyword(s):

Cement Composite ◽

Strength Properties ◽

Material Strength ◽

Cement Composites ◽

Compression Method ◽

Waste Wood ◽

Good Range ◽

Wood Cement Composites ◽

Construction Product

The article presents the results of studies on the production of wood-cement composite with various fillers, such as sawdust, gravel, bark and shavings, the binder acts as a cement. The developed technology allows producing the construction product with a good range of strength properties depending on the product. In the work carried out tests of samples on the strength of a compression method on the equipment VSFEU. The result of testing the strength of steel obtained dependence of material strength on the fraction of components in the mixture components, which then led to the conclusion that the strength limits varied from 0.38 MPa to 2.72 MPa.

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Effect of carbon dioxide injection on production of wood cement composites from waste medium density fiberboard (MDF)

Waste Management ◽

10.1016/j.wasman.2005.04.010 ◽

2006 ◽

Vol 26 (5) ◽

pp. 509-515 ◽

Cited By ~ 19

Author(s):

H. Qi ◽

P.A. Cooper ◽

H. Wan

Keyword(s):

Carbon Dioxide ◽

Medium Density Fiberboard ◽

Cement Composites ◽

Medium Density ◽

Carbon Dioxide Injection ◽

Wood Cement Composites

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SHORT NOTES: APPLICATION OF MINERAL FILLER IN MEDIUM DENSITY FIBERBOARD (MDF) AND ITS EFFECT ON MATERIAL PROPERTIES AS A FUNCTION OF PARTICLE SIZE

Wood Research ◽

10.37763/wr.1336-4561/66.5.891899 ◽

2021 ◽

Vol 66 (5) ◽

pp. 891-899

Author(s):

TOMASZ OZYHAR

Keyword(s):

Particle Size ◽

Material Properties ◽

Filler Content ◽

Urea Formaldehyde ◽

Medium Density Fiberboard ◽

Strength Properties ◽

Inorganic Filler ◽

Formaldehyde Resin ◽

Medium Density ◽

Wood Fibers

The addition of inorganic filler material in medium density fiberboard (MDF) and the effect on material properties as a function of particle size was examined. Medium density fiberboard was manufactured in a laboratory scale environment to a target raw densityof 750 kgm-3. Wood fibers were replaced by using calcium carbonate at 3 and 10 wt.% using fillers with weighted median particle sizes of d50= 2.0 μm and d50= 30 μm, respectively. Urea formaldehyde resin was used as binder in all MDF. The influence of filler addition on the modulus of elasticity, bending and tensile strength, dimensional stability and liquid permeability was investigated. The results demonstrate the effect of filler content and its dependence on particle size. The addition of filler with d50= 30 μm does not have any influence on material properties up to a filler content of 10 wt.%. Using the finer filler with d50= 2.0 μm at 10 wt.% filler, the quantity significantly increases the water adsorption and swelling behavior and reduces the strength properties of the MDF.

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ADSORPTION OF NANOWOLLASTONITE ON CELLULOSE SURFACE: EFFECTS ON PHYSICAL AND MECHANICAL PROPERTIES OF MEDIUM-DENSITY FIBERBOARD (MDF)

CERNE ◽

10.1590/0104776020162222146 ◽

2016 ◽

Vol 22 (2) ◽

pp. 215-222 ◽

Cited By ~ 13

Author(s):

Hamid Reza Taghiyari ◽

Roya Majidi ◽

Asghar Jahangiri

Keyword(s):

Mechanical Properties ◽

Density Functional ◽

Medium Density Fiberboard ◽

Physical And Mechanical Properties ◽

Mechanical Tests ◽

National Standard ◽

Medium Density ◽

Wood Fibers ◽

Strong Adsorption ◽

Cellulose Surface

ABSTRACT Effects of nanowollastonite (NW) adsorption on cellulose surface were studied on physical and mechanical properties of medium-density fiberboard (MDF) panels; properties were then compared with those of MDF panels without NW-content. The size range of NW was 30-110 nm. The interaction between NW and cellulose was investigated using density functional theory (DFT). Physical and mechanical tests were carried out in accordance with the Iranian National Standard ISIRI 9044 PB Type P2 (compatible with ASTM D1037-99) specifications. Results of DFT simulations showed strong adsorption of NW on cellulose surface. Moreover, mechanical properties demonstrated significant improvement. The improvement was attributed to the strong adsorption of NW on cellulose surface predicted by DFT, adding to the strength and integrity between wood fibers in NW-MDF panels. It was concluded that NW would improve mechanical properties in MDF panels as a wood-composite material, as well as being effective in improving its biological and thermal conductivity.

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Effect of calcite addition on technical properties and reduction of formaldehyde emissions of medium density fiberboard

BioResources ◽

10.15376/biores.16.2.3718-3733 ◽

2021 ◽

Vol 16 (2) ◽

pp. 3718-3733

Author(s):

Osman Camlibel

Keyword(s):

Liquid Paraffin ◽

Urea Formaldehyde ◽

Medium Density Fiberboard ◽

Formaldehyde Emission ◽

Modulus Of Rupture ◽

Medium Density ◽

Wood Fibers ◽

Hot Press ◽

Ammonium Sulphate Solution ◽

Hot Press Process

Physical, mechanical, and formaldehyde emission properties were studied for medium density fiberboard (MDF) produced with oak (75%) and pine (25%) fibers that had been mechanically refined in the presence of calcite particles. The calcite slurry was prepared at two levels of solids, 1.5% and 3% (10 and 20 kg·m-³). Chips were cooked for 4 min at 185 °C, under 8 bar vapor pressure in an Andritz defibrillator. 1.8% liquid paraffin, 0.72% ammonium sulphate solution, and 11% urea-formaldehyde were added by percentage based on oven-dried wood fibers in the blowline at the exit of the defibrator. The fibers were dried to 11% moisture content. MDF boards (2100 mm × 2800 mm × 18 mm) were created using a continuous hot-press process. The addition of calcite in the course of MDF production resulted in improved physical properties, such as thickness swelling (ThS 24 hours) and water absorption (WA 24 hours). MDF boards prepared with calcite exhibited higher internal bond (IB), modulus of rupture (MOR), and modulus of elasticity (MOE). Resistance to axial withdrawal of screw also was increased by addition of 3% calcite. In addition, the lowest levels of formaldehyde emission were observed for MDF prepared with calcite at the 3% level.

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About the Possibility of Recycling Water Treatment Sludge in the Wood–Cement Composites Production

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.299.305 ◽

2020 ◽

Vol 299 ◽

pp. 305-310

Author(s):

Zh.A. Sapronova ◽

S.V. Sverguzova ◽

A.V. Svyatchenko

Keyword(s):

Compressive Strength ◽

Water Treatment ◽

Water Absorption ◽

Average Density ◽

Cement Composites ◽

Water Treatment Sludge ◽

Regulatory Requirements ◽

Sorption Material ◽

Industrial Machine ◽

Wood Cement Composites

The paper presents the results of a study of the possibility of recycling water treatment sludge in the production of wood-cement composites. Sludge is formed during the treatment of sewage, containing industrial machine oil, with a sorption material, based on thermally modified chestnut tree waste (CTW). It was found that the addition of sludge leads to an increase in the density of the samples. Thus, the samples without the addition of sludge have an average density of 860 kg/m3, samples with the addition of sludge in an amount of 10 mass% - 875 kg/m3, 20 mass% - 879 kg/m3, 30 mass% - 882 kg/m3, 42 mass % - 887 kg/m3. Studies of the change in water absorption of samples, depending on the amount of sludge added, showed that the values slightly decrease for samples containing sludge, what is explained by the presence of oil in the mixture. The compressive strength of the samples with the addition of sludge in the amount of 42 mass% was 3.1 MPa, what corresponds to the regulatory requirements for a wood cement composites.

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Simple production of medium density fiberboards (MDF) reinforced with chitosan

Holzforschung ◽

10.1515/hf-2017-0101 ◽

2018 ◽

Vol 72 (4) ◽

pp. 275-281 ◽

Cited By ~ 5

Author(s):

Xiaodi Ji ◽

Yue Dong ◽

Ruidong Yu ◽

Wenxin Du ◽

Xue Gu ◽

...

Keyword(s):

Fourier Transform ◽

Photoelectron Spectroscopy ◽

Medium Density Fiberboard ◽

National Standard ◽

Medium Density ◽

Wood Fibers ◽

Hot Press ◽

X Ray ◽

Amide Bonds ◽

Simple Production

AbstractA simple and efficient method was developed for preparing medium density fiberboard (MDF) reinforced with chitosan via the traditional hot-press manufacturing process. The mechanical and dimensional properties of the MDF were investigated as a function of the chitosan amount. At the 4% level of added chitosan, the MDF reached the optimal performance and met completely the requirements of the Chinese national standard GB/T 11718-2009. Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS) and X-ray powder diffraction (XRD) characterizations revealed that wood fibers and chitosan might interact with each other through the formation of hydrogen and amide bonds during the hot-pressing process. The fracture surfaces of the MDFs are indicative for strong bonds at the interface, which explain the excellent MDF performance.

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The analysis of influence of polymer admixtures on properties of lightweight concrete

MATEC Web of Conferences ◽

10.1051/matecconf/201925208007 ◽

2019 ◽

Vol 252 ◽

pp. 08007 ◽

Cited By ~ 1

Author(s):

Jacek Góra ◽

Danuta Barnat-Hunek ◽

Paweł Wlaź ◽

Monika Garbacz

Keyword(s):

Tensile Strength ◽

Compressive Strength ◽

Statistical Analysis ◽

Lightweight Concrete ◽

Strength Properties ◽

Freezing And Thawing ◽

Factors Of Influence ◽

Freezing And Thawing Cycles ◽

Acetate Copolymer

The article presents the results of testing physical and strength properties of concrete with the addition of lightweight perlite in the amount of 10 and 20%. The additive was introduced by volume substituting a part of the sand. In addition, the effect of using siloxane admixtures and a vinyl acetate copolymer with different degree of dosing, as well as applied simultaneously, were analysed. The tests were carried out in the field of bulk density and proper density, determination of tightness and porosity, compressive strength and tensile strength after 28 days of maturation. In terms of durability of concrete, absorption and resistance of concretes to the freeze-up effects after 100 freezing and thawing cycles were tested. The results of the study were subjected to statistical analysis using the analysis of variance. The analysed factors of influence were the amount of perlite addition, as well as the type and amount of the added admixture

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