Mechanical Strengths of Sawdust-Ash-Admixed Gum Arabic Concrete

Elinwa, Augustine Uchechukwu

doi:10.21467/jmm.8.1.12-29

Cited by 3 publications

(5 citation statements)

References 16 publications

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“…Additionally, the use of inhibitors, in general, has increased the compressive strength compared to the sample without inhibitors. This has been observed in the study of other researchers [ 32 , 33 , 34 , 35 , 36 ]. Inhibitors can be used as an accelerator, which is characterized by higher hydration at an early age [ 37 , 38 , 39 ].…”

Section: Resultssupporting

confidence: 80%

The Effect of Eco-Friendly Inhibitors on the Corrosion Properties of Concrete Reinforcement in Harsh Environments

et al. 2022

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In the present research, the synergistic effect of Arabic and guar gum inhibitors on the corrosion efficiency of concrete reinforcement was investigated. Thus, eight types of Arabic and guar gum combinations with 100, 250, 500, 750, and 1000 ppm were added to the steel reinforcement for 1, 7, 28, 48, and 72 days. The corrosion behavior of the samples was investigated by the electrochemical impedance (EIS) test. Water transmissibility, electrical resistivity, and compressive strength of concrete were also studied. The results showed that adding inhibitors generally increased the compressive strength of concrete. It was also found that water transmissibility was reduced by the addition of inhibitors. The electrical resistivity of the samples increased slightly with increasing time up to 72 days. EIS and Tafel results have demonstrated that Arabic and guar gums are effective inhibitors for reinforced concrete structures. Furthermore, scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) utilized to analyze the samples indicated that inhibitor grain size was enhanced by enhancing the concentration of the inhibitor combination, showing that the guar and Arabic inhibitor combinations were properly absorbed on the reinforcement surface. Results showed that a sample with 250 ppm Arabic gum and 250 ppm guar gum having a properly distributed inhibitor combination on the reinforcement surface creates a desirable cathode current.

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Section: Resultssupporting

confidence: 80%

The Effect of Eco-Friendly Inhibitors on the Corrosion Properties of Concrete Reinforcement in Harsh Environments

et al. 2022

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“…Elinwa [16] used a mixture of Gum Arabic and Sawdust Ash to replace cement in concrete and discovered that with the Gum Arabic alone, the mechanical strength of the concrete increased, but with the mixture of Gum Arabic and Sawdust Ash, the mechanical strength of the concrete decreased. It was observed in the works of Elinwa and Abdukadir [17] that when SDA is used in reinforced concrete, it delays the process of corrosion of the reinforcements.…”

Section: Introductionmentioning

confidence: 99%

Properties of Sawdust Concrete

Onyechere

2022

Jour. of build. mater. Sci.

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This work examined the structural properties of concrete obtained bypartially replacing cement with sawdust ash. The sawdust ash which is apozzolan was obtained by burning sawdust which is a waste product fromprocessing of timber in an open air. The burnt ash was passed through a150 µm metric sieve to obtain the ash used. Physical and chemical analysiswere performed on the ash to verify its suitability as a partial substitute forcement in concrete. Chemical analysis was also carried out on the OrdinaryPortland Cement (OPC) sample. Concrete mixes were produced by replacing OPC with 0%, 5%, 10%, 20% and 30% of Sawdust Ash (SDA). Bothfresh and hardened properties of the concrete produced were investigated.The chemical investigation on the ash showed that it contained most ofthe basic compounds found in OPC making it suitable to serve as a partialsubstitute for OPC in concrete. Investigation on the concrete showed thatboth the workability and density of the concrete reduce as the SDA contentincreases. Analysis on the hardened concrete revealed that the compressivestrength of the concrete decreases as the ash content increases for the earlyages of curing. However, from 21 days curing age upwards, the compressive strength decreases as SDA increases up to 10% of SDA at which thecompressive strength jumped to a maximum value, and then starts reducingagain as the percentage SDA increases. Thus, the SDA concrete gained rapid strength at later ages indicating its pozzolanic activity.

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“…Gum Arabic is a natural binder from the hardened sap of acacia trees. Gum Arabic is found in the Middle East and North Africa [23,24]. It is called Gum Arabic because it is exported from Arabia countries [24].…”

Section: Introductionmentioning

confidence: 99%

“…Gum Arabic is found in the Middle East and North Africa [23,24]. It is called Gum Arabic because it is exported from Arabia countries [24]. Gum Arabic is not harmful; it is a normal branched-chain multi-functional hydrocolloid with a complex of calcium, magnesium and potassium [25].…”

Section: Introductionmentioning

confidence: 99%

“…Gum Arabic is not harmful; it is a normal branched-chain multi-functional hydrocolloid with a complex of calcium, magnesium and potassium [25]. Its chemical properties and features are being used in a wide range of industrial sectors such as textiles, ceramics, lithography, cosmetics and pharmaceuticals, encapsulation, food, etc [24]. For example, it is used worldwide as a stabilizer in wine, soft drink, candies, cosmetics, postage stamps, envelopes, paint and traditional treatment of diverse diseases [23].…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of Straw Bale Performance Using Gum Arabic

Njike¹,

Oyawa²,

Abuodha³

2021

TOBCTJ

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Background: The negative impacts of the construction industry are compelling arguments for embracing technology that contributes to carbon footprint reduction and resources conservation. Toward the achievement of objective 9 of the Sustainable Development Goals, the development of new building’s materials like straw bale has advanced in the construction industry. As demonstrated in the literature, straw bale is an eco-friendly material that presents many advantages, like its contribution towards a circular economy. However, it has low compressive strength and displays high displacement under compression load. So far, no attempt has been made in order to enhance the strength of straw bales. Objective: This study aimed to develop alternative material to straw bale using chopped straw stems mixed with a binder (gum Arabic) and determine its stress-strain characteristic. Methods: The manufacturing process of the new material involved the use of chopped straw and gum Arabic to form straw blocks. Results: Results obtained show that the compressive strength of straw block (1.25MPa) is greater than the strength of straw bale (0.02MPa). Also, the average displacement recorded during compression load on straw blocks (29mm) was 2.8 times smaller than the displacement in straw bale (80mm). In terms of shape and size, straw blocks match with conventional materials like cement or compressed block. This will facilitate their use in construction compared to straw bales that require skilled laborers for pre-compression and plastering. Conclusion: The use of gum arabic helps in holding straw stems together and forms a compact material with improved strength compared to straw bale. Performance improvement of the characteristics of load-bearing straw bale walls can be addressed by using straw blocks.

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Mechanical Strengths of Sawdust-Ash-Admixed Gum Arabic Concrete

Cited by 3 publications

References 16 publications

The Effect of Eco-Friendly Inhibitors on the Corrosion Properties of Concrete Reinforcement in Harsh Environments

The Effect of Eco-Friendly Inhibitors on the Corrosion Properties of Concrete Reinforcement in Harsh Environments

Properties of Sawdust Concrete

Enhancement of Straw Bale Performance Using Gum Arabic

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