Starch Sandstones in Building Bio-materials

Mansour, Gabriel; Zoumaki, Maria; Tzetzis, Dimitrios

doi:10.1051/matecconf/202031801046

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…The modulus of elasticity is measured from the stress–strain curve of the plastic sand brick 61 . This is done by analyzing the straight portion of the curve within the elastic deformation range.…”

Section: Resultsmentioning

confidence: 99%

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The use of recycled high‐density polyethylene waste to manufacture eco‐friendly plastic sand bricks

Gounden,

Mwangi,

Mohan

et al. 2023

SPE Polymers

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High‐density polyethylene (HDPE) polymer is one of the largest contributors to plastic wastes causing detrimental effects on various sectors of society, and is not biodegradable in nature. In the first stage, river sand and a recycled HDPE as a binder were used to manufacture eco‐friendly plastic sand bricks with various sand(s):plastic(p) ratios: 60s:40p; 65s:35p; 70s:30p; 75s:25p; 80s:20p; 85s:15p. In the second stage, 1%, 5%, and 10% of Kaolin Clay was added to each ratio of sand:plastic, respectively. Three mechanical tests were conducted: compressive strength, impact, and short beam strength. First, the addition of 5% Kaolin Clay to 75s:25p ratio increased compressive strength significantly from 21.4 to 52.76 MPa. Second, the addition of 10% Kaolin Clay in the ratio of 75s:25p mixture increased the impact strength from 4.8 to 5 J. Finally, the addition of 5% Kaolin Clay in the ratio of 60s:40p mixture increased the short beam strength significantly from 1.84 to 2.27 MPa. SEM analysis showed a well‐compacted interface indicating effective bonding between the HDPE and river sand particles in the 75s:25p ratio. Hence, the results of this study present a potential for the use of recycled HDPE plastic to manufacture plastic sand bricks.Highlights Addition of Kaolin Clay improved the mechanical properties of the composite material.

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Section: Resultsmentioning

confidence: 99%

“…The modulus of elasticity is measured from the stressstrain curve of the plastic sand brick. 61 This is done by analyzing the straight portion of the curve within the elastic deformation range. The modulus of elasticity represents the material's stiffness and its ability to resist deformation when subjected to compressive forces.…”

Section: Modulus Of Elasticitymentioning

confidence: 99%

The use of recycled high‐density polyethylene waste to manufacture eco‐friendly plastic sand bricks

Gounden,

Mwangi,

Mohan

et al. 2023

SPE Polymers

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Effect of Process Parameters on the Physical and Mechanical Properties of Cornstarch-Based Construction Materials

Tulip,

Sarker,

Nahar

et al. 2023

Construction Materials

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Concrete is used globally due to its useful mechanical and durability properties. However, concrete requires a massive amount of cement, which is the second-largest source of carbon emission (5–7% of global CO2 emissions) due to its high energy consumption. The gelatinization effect of corn starch as a binder has been explored in the place of cement in concrete. However, there is a need to optimize the various processing conditions to enhance the material strength of the corn starch-based material known as CoRncrete. Two experiments were conducted to optimize the ratio of sand, starch, water, curing temperatures, and time. The compressive and tensile strength of the CoRncrete samples were analyzed. The results showed that the optimum processing conditions having a sand grain size of 0.250–0.425 mm, a mixture ratio of starch, water, and sand 1:1:5, and curing temperature and time of 110 °C and 24 h can yield a maximum compressive strength up to 18.9 MPa. Statistical analysis revealed that the size of sand grains and curing temperatures had the most significant impact on the material’s strength. Microstructural analysis, employing scanning electron microscopy (SEM) and micro-computed tomography (microCT), unveiled numerous internal pores and cracks within the hardened cubic blocks, which significantly decreased the strength. Consequently, future investigations should concentrate on reducing internal pore spaces and cracks to enhance the durability of CoRncrete.

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Corn Starch-Based Sandstone Sustainable Materials: Sand Type and Water Content Effect on Their Structure and Mechanical Properties

et al. 2022

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A new biodegradable, sustainable and environmentally friendly building material is introduced and studied in this work, which can be applied to lightweight architectural structures, aiming for the reduction of the greenhouse gas emissions and mitigation of the climate change effects. The focus was to investigate the effect of water concentration and different types of sand on the mechanical properties of corn starch-based artificial sandstone. A series of cubic, cylindrical and disk specimens were prepared by varying the concentration of water and using different sources of commercial quartz sand. The quasi-static and cyclic compressive properties of starch-based artificial sandstone samples were measured as a function of water concentration and sand type, while the structure of the artificial sandstone specimens was examined by scanning electron microscopy (SEM) and optical microscopy. Moreover, the Brazilian Test was employed as the indirect method to determine the tensile strength of the samples based on the type of the commercial sand they contained. The experimental results showed that the homogeneous grading of sand grains and the latter’s chemical composition have a significant effect on the mechanical properties of the sandstone samples. The highest compression values were obtained using the microwave heating method at a water concentration of about 12 wt%, while the cyclic compression and Brazilian Tests have shown that the granulometric grading of the sand particles and the chemical composition of the sand influence the compressive and tensile strength of the material.

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Starch Sandstones in Building Bio-materials

Cited by 4 publications

References 8 publications

The use of recycled high‐density polyethylene waste to manufacture eco‐friendly plastic sand bricks

The use of recycled high‐density polyethylene waste to manufacture eco‐friendly plastic sand bricks

Effect of Process Parameters on the Physical and Mechanical Properties of Cornstarch-Based Construction Materials

Corn Starch-Based Sandstone Sustainable Materials: Sand Type and Water Content Effect on Their Structure and Mechanical Properties

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