Effects of Fines Contents on Engineering Properties of Sand-Fines Mixtures

Phan, Vu To-Anh; Hsiao, Darn-Horng; Nguyen, Phuong Thuc-Lan

doi:10.1016/j.proeng.2016.02.034

Cited by 35 publications

(12 citation statements)

References 6 publications

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“…Various techniques such as moist tamping, dry or moist pluviation, air pluviation and dry funnel deposition on sample preparations of sandy soil on triaxial test to measure soil behaviour have been presented by previous researchers (examples; [23]; [24]; [22]; [5]; [25]). Moist or wet tamping technique is the most popular technique applied for sample preparation as used by past researchers such as [26]; [27]; [28]; [29]. Through this technique, the homogeneous of the sample can be produced ( [17]; [25]; [30]).…”

Section: Table 1 Sand and Kaolin Composition In Sand Mixturesmentioning

confidence: 99%

Influence of Grain Sizes on Undrained Strength of Sand Mixtures

Othman¹,

Marto²,

Pakir³

et al. 2019

IJITEE

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Sand is known as the main material in land reclamation works to develop and widen an area. It is important for the Geotechnical Engineer to ensure the sand used can accommodate the burden imposed from the structures to be built on it. Previous researchers have conducted studies on the strength of sand, whether focusing on the sand itself or with the presence of fines. However, the study of sand grain size effects in sand mixtures in affecting sand behavior is extremely limited. The sizes and angularity of the sand particle are believed to contribute to the behavior of sand mixtures soil. Hence, the study to investigate the effect of sand grain size on sand mixtures in term of undrained strength is being carried out. The sand was sieved to coarse sand, medium sand and fine sand then each size was mixed with kaolin at 0 %, 20 % and 40 %. The undrained strength was obtained from triaxial test on undrained condition. As a result, it is found that the maximum deviator stress, qmax increases with the decrease of fines (kaolin) content. On the other hand, at the same fines content, increased of sand size leads to the increased of qmax, which means the increased of undrained shear strength. In addition, the angular shape of sand particle was thought to contribute to the high value of undrained shear strength for the sand mixtures.

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Section: Table 1 Sand and Kaolin Composition In Sand Mixturesmentioning

confidence: 99%

Influence of Grain Sizes on Undrained Strength of Sand Mixtures

Othman¹,

Marto²,

Pakir³

et al. 2019

IJITEE

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“…Besides, G 0 is affected (reduced) by the amount of fines. Phan et al (2016) studied the influence of low plasticity fines content on sand-fines specimens at a given relative density and found out that as fines content increase the internal friction angle decreases and the cohesion intercept increases.…”

Section: Introductionmentioning

confidence: 99%

Behaviour of cement-stabilised silty sands subjected to harsh environmental conditions

Consoli

Carretta

Leon

et al. 2020

Proceedings of the Institution of Civil Engineers - Geotechnica

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The present study evaluates the effect of three distinct amounts of fines, Portland cement and dry unit weights on the accumulated loss of mass (ALM), maximum shear modulus at small strains (G 0) and tensile strength (q t) of stabilised sands subjected to wet-dry cycles. Tensile strength test results showed that addition of fines to a sand stabilised with cement increased its tensile strength, irrespective of the dry unit weight ( d) and cement amount present in the mixture. Increasing the amounts of fines of compacted cement-stabilised silty sand specimens subjected to wetting-drying cycles reduces ALM and increases G 0 and q t of the mixtures. This may be due to the fact that specimens with larger amounts of fines have more contact points amongst particles, which provides better opportunities for the cement to develop more efficient bonds within the soil fabric, improving its mechanical performance. The increase in cement content and in  d of compacted cement-stabilized silty sand specimens reduced their ALM and increased G 0 after each one of the twelve wet-dry cycles. The G 0 and q t of cement-stabilized silty sand specimens with fines increases up to the sixth cycle, remaining practically constant after that, when these specimens are subjected to wetting-drying cycles.

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“…Compaction with a certain amount of fines content (30%) increases the maximum dray density and decrease optimum moisture content [5]. The amalgamate of fines up to a certain percentage increases the maximum dry density of poorly graded sands [6][7][8]. Dust shield polymer increases dry density and shear strength of soils [9].…”

Section: Introductionmentioning

confidence: 99%

“…The fines content improves dry density, shear strength, and reduce angle of internal friction (ϕ) up to a threshold of fines content [14,19,20]. The internal friction angle decreases with increase in fine content and cohesion increases [6,19,21,22]. The undrained shear strength, soil modulus, and pore pressure decreased when the clay content increased [23].…”

Section: Introductionmentioning

confidence: 99%

A Disaster Resilient Road: Effects of Fines on Density and Shear Strength of Sands

Shahin¹,

Khan²,

Bari³

2020

IJTET

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During a massive flood or earthquake, the roads are mainly damaged due to the looseness of the subgrades. In recent times for any new constructions of roads and embankments the subgrades mainly constructed with the sand filling. It is difficult to achieve the desired degree of compaction beyond a certain limit. That's why the bases (subgrades) become loose. This study aims to overcome the situation by increasing compaction and shear strength properties of sand filling. In this paper, an intensive laboratory investigation of fines with sands is investigated by a series of the proctor test and direct shear test. In this study, fines were mixed with the sand samples in a proportion of 10%, 20%, 30%, 45% and 55% to examine the effect on maximum dry density. Tests indicated that 45 to 55% fines with sands having different Fineness Modulus (FM), the Maximum Dry Density (MDD) of the sand can be increased up to 18 to 26% depending on FM. The results revealed that the density and shear strength (cohesion) of sand both increase significantly with the addition of fines with it up to a certain percentage. This increment in MDD and shear strength makes the bases (subgrades) stronger and stable. This result can be used in disaster resilient road or embankment construction and also for the structures having a shallow foundation.

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Effects of Fines Contents on Engineering Properties of Sand-Fines Mixtures

Cited by 35 publications

References 6 publications

Influence of Grain Sizes on Undrained Strength of Sand Mixtures

Influence of Grain Sizes on Undrained Strength of Sand Mixtures

Behaviour of cement-stabilised silty sands subjected to harsh environmental conditions

A Disaster Resilient Road: Effects of Fines on Density and Shear Strength of Sands

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