Unconfined Compressive Strength of Clay Strengthened by Coconut Fiber Waste

Widianti, Anita; Diana, Willis; Fikriyah, Zahroh Shofiyatul

doi:10.2991/aer.k.210204.010

Cited by 5 publications

(8 citation statements)

References 18 publications

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“…Bagasse ash has a very high percentage of SiO2, namely 81.12%. The coir fiber content is 0.75% (based on research results by Widianti et al) [21], while the bagasse ash content varies between 0%-10% of the specimen's total weight. Table 2 displays the mixed design of the specimens.…”

Section: Methodsmentioning

confidence: 99%

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Increasing Unconfined Compressive Strength of Soft Clay Stabilized with Coir Fiber and Bagasse Ash Mix

Widianti,

Sundi,

Rahmawati

et al. 2024

U Karst

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Increasing coir fiber and bagasse ash waste can cause environmental degradation. Utilization of this waste in construction work is still rarely done. Coir fiber is a natural material with the highest coefficient of friction and tensile strength. Bagasse ash has a high silica content and is suitable for use as pozzolan. Soil stabilization with a combination of both is expected to improve the geotechnical properties of soft soil. This research aims to analyze the unconfined compressive strength (UCS) and secant modulus of soft clay stabilized with coir fiber-bagasse ash mix. Coir fiber as much as 0.75% and ash with varying contents: 0%, 2%, 4%, 6%, 8%, and 10% of the total weight of the mixture. The specimens were cured for 28 days. UCS tests were conducted according to ASTM D2166-16 with the axial stress and strain relationship curve results to determine the UCS and secant modulus. The results showed that the UCS value and secant modulus value increased along with increasing bagasse ash content. The maximum value was achieved at 8% ash variation with a UCS value of 472.45 kPa (an increase of 382% from a soil-coir fiber mix) and a secant modulus value of 21.94 MPa (an increase of 571% from a mixture of soil and coir fiber). The research results show that this mixed soil is classified as hard soil, which can withstand high loads. It is hoped that the results of this research can become a reference for stabilizing soft soil in the field.

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Section: Methodsmentioning

confidence: 99%

“…UCS peaks at a coir fiber percentage of 0.75%, with a value of 98.10 kPa. The strength decreases when the percentage of coir fiber is more than 0.75% [21]. Several UCS tests have also been carried out using a combination of coir fiber reinforcement and chemical stabilization.…”

Section: U Karstmentioning

confidence: 99%

Increasing Unconfined Compressive Strength of Soft Clay Stabilized with Coir Fiber and Bagasse Ash Mix

Widianti,

Sundi,

Rahmawati

et al. 2024

U Karst

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“…The clay was mixed with coir fibers with a fixed content of 0.75% of the mixture's total weight (based on the results of previous studies) [28] and ash with varying content, as presented in Tables 4 and 5.…”

Section: Mixture Design Of Specimensmentioning

confidence: 99%

“…Several studies have been done by many researchers and shown that coir waste is helpful as a soil-reinforcing material. The soil's mechanical properties experienced a significant improvement [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. Randomly incorporating fibers enhances soil properties such as shear strength, bearing capacity, and tensile strength.…”

Section: Introductionmentioning

confidence: 99%

Combination of Coir Fiber Waste and Coir-Wood Ash for Expansive Clay Stabilization

Widianti

2023

GEOMATE

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Coir waste randomly mixed into soil is an alternative material for strengthening expansive clay. However, these materials cannot reduce swelling due to water, requiring chemical stabilization. This study combined coir fibers with a mixture of coir-wood ash, the waste from the tofu home industry. No studies have utilized such a combination of structural materials. This study aims to examine the soaked and unsoaked California Bearing Ratio (CBR), swelling, unconfined compressive strength (UCS), and tensile strength of soil mixed with 0.75% fibers, and ash with varying content: 0%, 2%, 4%, 6%, 8%, and 10% of the mixture's total weight. The curing time was seven days, 14 days, and 28 days. Testing refers to ASTM. The test results unveiled that the unsoaked CBR, soaked CBR, UCS, and tensile strength increased with rising ash content and curing time. A 6%-8% ash content produced the highest CBR, UCS, and tensile strength. On the other hand, by including a 6%-10% ash content, the swelling was decreased to 0%. Combining coir fiber and coir-wood ash has proven very effective for stabilizing expansive clays. In comparison to soils merely reinforced with fiber, the addition of coir-wood ash can eliminate swelling and increase the value of soaked CBR, UCS, tensile strength, and secant modulus up to 534%, 349%, 105%, and 824 %, respectively.

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“…A study on the variation of the unlimited compressive strength (UCS) of a clay soil reinforced with coconut fiber concluded that the UCS of clay increases significantly with the addition of more coconut fiber. On the other hand, it was observed that the reinforced clay becomes stiffer than the initial soft clay, thus improving the stability of the soil being the coir a fiber with a higher tensile strength than others [51].…”

Section: Coconut Fiber (Coir)mentioning

confidence: 99%

Natural Fibers: An Alternative for the Reinforcement of Expansive Soils

et al. 2022

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The reinforcement of soils is the technique that geotechnical engineers currently use to improve the shear strength and bearing capacity parameters, especially when the land available for the execution of a project is not able to withstand the structural loads to which it is subjected. One of the techniques, used for this purpose since ancient times, is the incorporation of fibers into the soil matrix; however, great interest in its study has only begun in the last two, mainly because it constitutes a low-cost and environmentally friendly alternative. In this paper, a brief bibliographic review is presented on seven of the natural fibers that are currently used in order to improve the mechanical behavior of expansive clay soils (bamboo, jute, coco, palm, sugar cane bagasse, rise husk, and sawdust). It can be concluded that in many cases, the addition of certain amounts of natural fibers increases the parameters of resistance to the cutting of soils.

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Unconfined Compressive Strength of Clay Strengthened by Coconut Fiber Waste

Cited by 5 publications

References 18 publications

Increasing Unconfined Compressive Strength of Soft Clay Stabilized with Coir Fiber and Bagasse Ash Mix

Increasing Unconfined Compressive Strength of Soft Clay Stabilized with Coir Fiber and Bagasse Ash Mix

Combination of Coir Fiber Waste and Coir-Wood Ash for Expansive Clay Stabilization

Natural Fibers: An Alternative for the Reinforcement of Expansive Soils

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