Strength characteristics of polymer-bonded sands

Garcia, Nicole F.; Valdès, Julio R.; Cortes, Douglas D.

doi:10.1680/jgele.15.00089

Cited by 7 publications

(3 citation statements)

References 18 publications

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“…Previous studies associated with heat-induced polymer bonded sands emphasize strength gain with minimal polymer contents. In a composite with low gravimetric polymer content (e.g., 1%) [20] and relatively small polymer particles, i.e., dpoly << d sand , the polymer volume is much smaller than the volume of voids (V p << V v ), and therefore, the polymer particles rest initially in the voids comprised by the sand grain assembly. Upon heating, the polymer particles melt, and upon cooling, the porous composite features hardened polymer menisci at contacts.…”

Section: Phase Relationshipsmentioning

confidence: 99%

“…The hot mix exits the chamber and falls by gravity into a cylindrical steel mold with diameter = 5 cm. Pre-lining of the mold with wax paper or aluminum foil, as in previous studies [19], [20], was not necessary because polypropylene does not adhere readily to steel. The mixture is allowed to cool in the mold under a sustained stress of approximately 600 kPa using a hydraulic press.…”

Section: Apparatusmentioning

confidence: 99%

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Hot mix method for the manufacture of sand-polymer bricks

Miranda,

Nascimento,

Valdes

2024

Rev. IBRACON Estrut. Mater.

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This manuscript presents a method to produce sand-polymer bricks motivated by the need to reuse plastic waste and to reduce the embodied energy and carbon footprint associated with manufacturing. The method is designed to be simple: it involves a custom-built apparatus that simultaneously mixes and heats dry sand and recycled polypropylene granules, until the latter melt. The hot mixture is then compressed in a mold until the polymer rehardens, thereby producing a bonded brick upon extrusion. Bricks with 10% and 20% polymer content (i.e., by mass, PCg), were prepared with either a fine sand or a coarse sand. The voids of the PCg = 10% bricks were approximately halfway filled with hardened polymer, whereas the voids of the PCg = 20% bricks were nearly entirely filled. Bricks with PCg = 20% were found to be potential candidates for replacement of fired clay bricks, as these exhibited infiltration levels well below specification thresholds for fired clay bricks and strengths comparable to those reported for fired clay bricks. Furthermore, the embodied energy associated with sand-polymer bricks was calculated to be around a third of that required for fired clay bricks. In addition, the manufacture of sand-polymer bricks requires minutes, whereas that of fired clay bricks requires hours. The results gathered suggest that bricks produced by the proposed method have potential for replacement of fired clay bricks in applications wherein replacement is favorable.

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Section: Phase Relationshipsmentioning

confidence: 99%

Section: Apparatusmentioning

confidence: 99%

Hot mix method for the manufacture of sand-polymer bricks

Miranda,

Nascimento,

Valdes

2024

Rev. IBRACON Estrut. Mater.

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“…Garcia et al [ 22 ] observed considerable increases in cementation forces, traction, and shear strength of sandy soil with polymer addition, compared with pure sand and another sand with artificial cementation.…”

Section: Introductionmentioning

confidence: 99%

The Application of an Eco-Friendly Synthetic Polymer as a Sandy Soil Stabilizer

Boaventura,

Sousa,

Casagrande

2023

Polymers

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The conducted investigation encompassed the comprehensive integration of mechanical, environmental, chemical, and microstructural evaluations of a composite amalgamating sandy soil and a synthetic polymer at two distinct concentrations (2.5% and 5%) across multiple curing intervals (0, 1, 2, 4, 7, 15, 30, and 45 days). The studied soil originates from an environmentally significant protected area in Brazil. The implementation of mechanisms for soil improvement in the region must adhere to technical criteria without causing environmental harm. Direct shear testing was conducted, permeability was assessed, and microstructure analysis and XRD and XRF/EDX studies of both the soil and composites were conducted. It was observed that longer curing times yielded improved results in shear stress, friction angle, and cohesive intercept, with SP_5% exhibiting the highest values compared with the soil and SP_2.5%. Adding the polymeric solution to the soil contributed to cementation and cohesion gains in the substrate. Through microstructural characterization, the polymer’s role as a cementing agent for the grains is evident, forming a film on the grains and binding them together. Based on the analyses and studies conducted in the research, it can be concluded that there is technical feasibility for applying the polymeric solution at both dosages in geotechnical projects.

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Freeze-thaw behavior of lime stabilized clay reinforced with silica fume and synthetic fibers

Saygılı

Dayan

2019

Cold Regions Science and Technology

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Strength characteristics of polymer-bonded sands

Cited by 7 publications

References 18 publications

Hot mix method for the manufacture of sand-polymer bricks

Hot mix method for the manufacture of sand-polymer bricks

The Application of an Eco-Friendly Synthetic Polymer as a Sandy Soil Stabilizer

Freeze-thaw behavior of lime stabilized clay reinforced with silica fume and synthetic fibers

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