Effective use of sawdust for the production of eco-friendly and thermal-energy efficient normal weight and lightweight concretes with tailored fracture properties

Ahmed, Wisal; Khushnood, Rao Arsalan; Memon, Shazim Ali; Ahmad, Sajjad; Baloch, Waqas Latif; Usman, Muhammad

doi:10.1016/j.jclepro.2018.03.009

Cited by 69 publications

(22 citation statements)

References 25 publications

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“…Sawdust, a light-weight, inexpensive, and environmentally friendly material, is frequently used in practical engineering. Applications include its use as an additive in concrete or in amended lateritic clay as a landfill liner to retain heavy metals [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Properties of Sand-Sawdust Mixture for Modeling Deposit Soil

Pan

Xue-ju

et al. 2019

Applied Sciences

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Soil mixtures with various materials such as scraps of rubber tire, iron powder, and synthetic fibers have been widely used in civil engineering for experimental research or infrastructure construction and maintenance. However, these materials are not only expensive, but may also result in environmental concerns. In recent years, sawdust, because of its light-weight, inexpensive, and environmental friendly characteristics, has frequently been used in the shaking table test to adjust the dynamic properties of experimental soil. However, the dynamic properties of a sand-sawdust mixture for the shaking table test are still unclear. In this paper, the dynamic properties and the hysteresis curve characteristics of the sand-sawdust mixture as well as the influence of the sawdust content and confining pressure on the dynamic properties were studied using a series of consolidated drained dynamic triaxial tests. The test results show that, with the increase of the shear strain, the shape of the hysteresis loops changes from symmetrical willow-leaf to asymmetry sharp-leaf. For a given confining pressure, both the shear modulus and damping ratio decreases as the sawdust percentage increases. It was observed that, with an increase in confining pressure, the shear modulus increased while the damping ratio decreased slightly in the shear strain range of 10−3 to 7×10−3. It was also observed that the maximum shear modulus increased as the confining pressure increased, while the maximum damping ratio remained nearly constant. In addition, both the maximum shear modulus and the maximum damping ratio decreased as the sawdust content increased. Finally, the normalized shear modulus and damping ratio were established, which can be used in simulations using the shaking table test.

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Section: Introductionmentioning

confidence: 99%

Dynamic Properties of Sand-Sawdust Mixture for Modeling Deposit Soil

Pan

Xue-ju

et al. 2019

Applied Sciences

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“…The low density and high thermal insulation value of waste wood aggregate such as sawdust [24] makes it a good alternative ingredient for the production of lightweight concrete and thermal insulation construction composites. Ahmed et al [41] observed that a mix design of coarse aggregate, sand and cement, with different dosages of sawdust as partial replacement for sand, produced eco-friendly and thermal efficient normal and lightweight concretes.…”

Section: Lightweight Sawdust Concretementioning

confidence: 99%

Engineering Characteristics and Potential Increased Utilisation of Sawdust Composites in Construction—A Review

Mwango¹,

Kambole²

2019

JBCPR

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Many timber producing countries generate more than 2 million m 3 of sawdust annually. In developing countries, sawdust is often disposed of by open dumping, open burning, or dumping in landfills. This poses huge environmental challenges related to air pollution, greenhouse gas emissions, and destruction of plant and aquatic life. Findings from this review article reveal that sawdust can be used to make sawdust construction composites with good modulus of elasticity, water absorption and strength characteristics that satisfy international specifications. These composites include particleboards, sawdust concrete blocks or bricks and sawdust concrete. The article concludes that partially replacing 5% to 17% of sand with sawdust, or replacing cement with sawdust ash in proportions of 5% to 15% in concrete mixes can produce structural concrete with compressive strengths greater than 20 MPa. Partially replacing 10% to 30% of sand used in the manufacture blocks and bricks with sawdust can also produce sawdust bricks and blocks with compressive strengths greater than 3 MPa. Sawdust composites are also attractive for their low thermal conductivity, high sound absorption and good sound insulation characteristics. These findings indicate that increased utilisation of sawdust composites in construction will mitigate against potential sawdust environmental pollution, conserve energy and reduce disposal costs.

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“…Application of sawdust in civil engineering has been the focus of many studies. Ahmed et al [8] worked on adding sawdust to concrete mix in light and normal weight concrete. They summarized that sawdust can be a good alternative for fine-grain materials.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Recycled Sawdust in Controlling Sulphate Attack in Cemented Clay

Chegenizadeh

Keramatikerman²,

Miceli

et al. 2020

Applied Sciences

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Application of sawdust in civil engineering projects, specifically those with geotechnical applications, has been the interest of many studies. This study focuses on exposure of soil samples treated with sawdust to MgSO4. This study was conducted in three stages. The first stage was compaction. In this stage, the compaction characteristics of each mixture were derived. The second stage was to run unconfined compressive strength (UCS) testing and report the UCS peaks relevant to each mixture. The third stage was microstructural examination (i.e., SEM) conducted on the chosen samples before and after sulphate exposure to highlight the reactions during exposure. The results of first stage (i.e., compaction tests) suggested that increasing sawdust content, the OMC (Optimum moisture content) decreased and MDD (Maximum dry density) decreased. In the second stage, the UCS (Unconfined compressive strength) testing was conducted on 640 samples [including reliability tests] and the outcome suggested that sawdust increased the resistance of samples against sulphate attack. In stage three, the micro analysis backed the main body results, suggesting that sawdust had a positive effect on helping to form a better connection between the particles and therefore more resistance noted.

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Effective use of sawdust for the production of eco-friendly and thermal-energy efficient normal weight and lightweight concretes with tailored fracture properties

Cited by 69 publications

References 25 publications

Dynamic Properties of Sand-Sawdust Mixture for Modeling Deposit Soil

Dynamic Properties of Sand-Sawdust Mixture for Modeling Deposit Soil

Engineering Characteristics and Potential Increased Utilisation of Sawdust Composites in Construction—A Review

Investigation on Recycled Sawdust in Controlling Sulphate Attack in Cemented Clay

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