UTILISATION OF PLASTIC SACKS FIBRE AND BRAN ASH FOR SOFT CLAY SHEAR STRENGTH

2016 ◽  
Vol 78 (8-5) ◽  
Author(s):  
Nyimas Septi Rika Putri ◽  
Ratna Dewi ◽  
Muhammad Ilham
Keyword(s):  
Shear Strength ◽  
Soft Soil ◽  
Soft Clay ◽  
Dry Weight ◽  
Strength Properties ◽  
Optimum Level ◽  
Soil Stabilisation ◽  
Strength Tests ◽  
Bearing Load ◽  
Soil Shear Strength

Soft soil possess poor mechanical properties, thus produce problems when bearing load. To overcome the problems, soft soil has to be stabilised. To do soil stabilisation, it Is imperative to add some mixture as additional substance in order to improve the characteristic of the soft soil. Plastic sacks fibre is one of the easily obtainable material which consists of high density profile, while bran ash contains good carbon and silica. This research aimed to determine the optimum level of plastic sacks waste fibre and bran ash to obtain the maximum soil shear strength and to compare the original soil shear strength with the modified mixture soil shear strength. The strength tests were conducted on the laboratory scale using the triaxial test device for the Unconsolidated Undrained (UU) test. Soft clay sample was mixed with the chop of plastic sacks fibre with the following level of composition : 0.4 % , 0.6 %, 0.8 %, 1 %, and also the bran ash composition content of  0 %, 2 % and 4 % to the dry weight of soil with the test unit of 36 pieces. Based on laboratory testing, the maximum cohesion value reside on variation of 0.8 % plastic sacks fibre and 2 % bran ash with the value of 0.65 kg/cm2, and the maximum shear angle lays on variation of 1 % of plastic sacks fibre and 0 % of bran ash with the value of 9.95 degree. For the mixture variation of 0.8 % plastic sacks fibre and 2 % of bran ash, it produced a shear strength of 0.67 kg/cm2 and abled to increase the soil shear strength by 87.08 %. As a conclusion, the use of plastic sacks fibre and bran ash was found to be able to improve the soft clay shear strength properties.

Undrained Uniaxial Capacities of Suction Bucket Foundations in Rows

2018 ◽  
Author(s):  
Zhong Xiao ◽  
Yumin Lu ◽  
Ying Liu
Keyword(s):  
Finite Element ◽  
Shear Strength ◽  
Soft Soil ◽  
Failure Mechanisms ◽  
Soft Clay ◽  
Finite Element Models ◽  
Simple Construction ◽  
Bucket Foundation ◽  
Spacing Ratio ◽  
Soil Shear Strength

Suction bucket foundations in rows, sunk by self-weight and passive suction, can be used as footings of breakwater, trestle bridge, offshore cofferdam and other structures, and they have a fine application prospect on soft soil for their advantages of good bearing capacities, simple construction, low investment, being reusable and so forth. A large number of finite-element models for suction bucket foundations in undrained soft clay were established to investigate uniaxial capacities of suction bucket foundations, and the effects of foundations spacing ratio, embedment ratio and soil shear strength were studied. The results show that foundations spacing ratio has certain effect on the uniaxial capacities of a suction bucket foundation but is less influential than other factors; embedment ratio and soil shear strengths have more influence on the uniaxial bearing capacities and failure mechanisms of bucket foundation. Based on these results, simplified formulae are proposed to predict uniaxial capacities of suction bucket foundations in rows for designers to use directly.

scholarly journals Compaction and Plasticity Comparative Behaviour of Soft Clay Treated with Coarse and Fine Sizes of Ceramic Tiles

2018 ◽  
Vol 34 ◽  
pp. 01012 ◽  
Author(s):  
Mohammed Ali Mohammed Al-Bared ◽  
Aminaton Marto ◽  
Indra Sati Hamonangan Harahap ◽  
Fauziah Kasim
Keyword(s):  
Soil Stabilization ◽  
Soft Soil ◽  
Soft Clay ◽  
Cost Effective ◽  
Dry Weight ◽  
Dry Density ◽  
Ceramic Tiles ◽  
Marine Clay ◽  
Maximum Dry Density ◽  
Stiff Soil

Recycled blended ceramic tiles (RBT) is a waste material produced from ceramic tile factories and construction activities. RBT is found to be cost effective, sustainable, environmental-friendly and has the potential to be used as an additive in soft soil stabilization. Recent reports show that massive amounts of RBT are dumped into legal or illegal landfills every year consuming very large spaces and creating major environmental problems. On the other hand, dredged marine clay obtained from Nusajaya, Johor, Malaysia has weak physical and engineering characteristics to be considered as unsuitable soft soil that is usually excavated, dumped into landfills and replaced by stiff soil. Hence, this study investigates the suitability of possible uses of RBT to treat marine clay. Laboratory tests included Standard proctor tests and Atterberg limits tests. The plasticity of marine clay was evaluated by adding 10%, 20%, 30% and 40% of 0.3 mm RBT. In addition, the compaction behaviour of treated marine clay was compared by adding two different sizes (0.3 mm and 1.18 mm diameter) of RBT. For both coarse and fine sizes of RBT, 10%, 20%, 30% and 40% of the dry weight of the soft clay were added. The mixture of each combination was examined in order to evaluate the Maximum Dry Density (MDD) and the optimum moisture content (OMC) for the treated soft clay. MDD and OMC for soft untreated samples were 1.59 Mg/m3 and 22%, respectively. Treated samples with 10%, 20%, 30% and 40% of 0.30 mm size RBT resulted in a significant reduction of OMC ranged from 19 to 15% while MDD resulted in increment ranged from 1.69 to 1.77 Mg/m3. In addition, samples treated with 10%, 20%, 30% and 40% of 1.18 mm size RBT resulted in major reduction of OMC ranged from 15 to 13.5% while MDD increased effectively from 1.75 to 1.82 Mg/m3. For all mix designs of soft clay-RBT, MDD was gradually increasing and OMC was sharply reducing with further increments of both sizes of RBT.

The Effect of Heat Induction on Shear Strength of Soft Soil in Radial Zone

2020 ◽  
Vol 998 ◽  
pp. 329-334
Author(s):  
Maraden Panjaitan ◽  
Lawalenna Samang ◽  
Achmad Bakri Muhiddin ◽  
Tri Harianto
Keyword(s):  
Compressive Strength ◽  
Shear Strength ◽  
Soft Soil ◽  
Soft Clay ◽  
Experimental Result ◽  
Small Scale ◽  
Infrastructure Development ◽  
Heat Induction ◽  
Vane Shear Test ◽  
Radial Zone

The main problem in infrastructure development at the soft clay was its bearing capacity therefore it needs to be improved. In this research, the improvement method was carried out by modeling in small scale of preloading and heat induction combination. Location of soft clay sampling was in Takalar, Indonesia. The purpose of this study was to investigate the change of the shear strength of soft soil corresponding with heat induction at the radial zone. The shear strength was obtained by vane shear test and compressive strength from unconfined compressive test (UCT). The heat applied ranging from 100o C, 200o C, 300o C, and 400o C with static preloading load 0.20 kg/cm2. The strengths of the soil in radial zones have been tested at R0, R1, and R2. At lowest temperature 100° at R0 the compressive strength was 0.203 kg/cm2, at highest temperature 400° at R0 the compressive strength 0.467 kg/cm2, there was a significant increasing of compressive strength value with the change of temperature. At the highest temperature 4000 the shear strength from vane shear tests resulting at R0 0.240 kg/cm2, R1 of 0.128 kg/cm2, R2 of 0.077 kg/cm2. At the lowest temperature of 100o C shows R0 at 0.116 kg/cm2, R1 at 0.070 kg/cm2, R3 of 0.046 kg/cm2. The results show a tendency of declining strength value as the soil farther away from center of heat induction. The experimental result from this model produces strength that can be used as a parameter of the foundation model on soft soil.

Rate of strength increase of unsaturated lateritic soil

2008 ◽  
Vol 45 (9) ◽  
pp. 1335-1343 ◽  
Author(s):  
Meen-Wah Gui ◽  
Chun-Ming Yu
Keyword(s):  
Shear Strength ◽  
Failure Criterion ◽  
Matric Suction ◽  
Slope Instability ◽  
Lateritic Soil ◽  
Strength Increase ◽  
Residual Soil ◽  
Strength Tests ◽  
Soil Shear Strength ◽  
Intact Soil

Lateritic soil is a kind of residual soil that is widely distributed in Asia. The water table of the soil is normally very deep so the upper part of the soil is often unsaturated. The largest lateritic soil area in Taiwan is the Linkou terrace. Because the soil here is loosely cohered and consolidated, the problem of slope instability and landslides has always been a major concern. To evaluate the triggering mechanism of landslides, it is necessary to obtain the failure criterion that represents both the saturated and unsaturated conditions of the soil before any analysis is carried out. The parameter required to define such a failure criterion is the rate of shear strength increase, tan φb, which can be obtained via a series of laboratory strength tests in a modified triaxial system under various matric suction levels. Both the intact and remolded lateritic soils taken from Linkou terrace have been tested for this purpose. The results confirm that matric suction in the lateritic soil contributes significantly to the soil shear strength and that intact soil has a higher strength than remolded soil.

scholarly journals STUDI SIFAT MEKANIS TANAH MERAH DENGAN PENGUJIAN TRIAKSIAL

2018 ◽  
Vol 7 (1) ◽  
pp. 29-34
Author(s):  
Redaksi Tim Jurnal
Keyword(s):  
Shear Strength ◽  
Soil Type ◽  
Clay Soil ◽  
Soft Soil ◽  
Soft Clay ◽  
Liquid Limit ◽  
Red Soil ◽  
Triaxial Tests ◽  
Limit Value ◽  
Triaxial Apparatus

Characteristics soft soil can cause instability and long-term degradation problems. This is because the soil has a low shear strength value and high compressibility. One type of soil belonging to the soft soil type is soft clay soil. Red soil belongs to the soft clay soil type. Therefore, the purpose of this research to determines the parameters of the shear strength of red soil in the area of Pakjo City Palembang, South Sumatra Province. The equipment had been used to obtain parameters of mechanical properties of red soil was using Triaxial apparatus. The results of the red soil properties index include: water content value (□ 27.70%, specific gravity value (Gs) 2.67, liquid limit value (LL) 66.00%, value of plastic limit of 25.13% and index value (IP) of 40.87% Classification of soil CH (USCS) and A-7-6 (AASHTO). The result of the Triaxial tests was the value of cohesion (c): 16.25-18, 15 kPa, and internal friction (□): 13.50-14.75⁰. The result of shear strength (□) : 17.68-24.02 kPa. The shear strength value of red soil indicates soil which includes soft soil (12.5-25 kPa).

scholarly journals Shear strength properties of Hong Kong soils for slope stability

2020 ◽  
Vol 27 (1) ◽  
pp. 48-54
Author(s):  
Hong Yau Wong
Keyword(s):  
Shear Strength ◽  
Hong Kong ◽  
Slope Stability ◽  
Triaxial Compression ◽  
Quantitative Relationship ◽  
Site Investigation ◽  
Standard Penetration Test ◽  
Strength Properties ◽  
Triaxial Tests ◽  
Soil Shear Strength

With the recent advancement in technology, the method, accuracy and speed of slope stability analysis have been vastly improved. Nevertheless, the reliability and appropriateness of such analysis can be very much in doubt if the soil behaviour, in particular the shear strength behaviour, is not fully understood. The objective of this paper is therefore to evaluate the shear strength behaviour of various soil types in Hong Kong. This comprises the collection, processing and analysis of the laboratory and field works carried out in the past few decades, in particular the triaxial compression testing in the laboratory and standard penetration test (SPT) in the field. For correlating SPT with soil shear strength, a fairly large number of carefully controlled site investigation works with SPT are carried out both above and below any Mazier sampling. Laboratory triaxial tests are then carried out in these Mazier samples. Finally, it is hoped that a basically quantitative relationship between soil shear strength and SPT can be obtained as this would enable a soil shear strength profile to be established once the corresponding SPT profile has been determined on site by carrying out SPT in adequate number of drill holes.

scholarly journals Effects of Fly Ash and Granulated Ground Blast Furnace Slag on Stabilization of Crude Oil Contamination Sandy Soil

2019 ◽  
Vol 9 (2) ◽  
pp. 80-85
Author(s):  
Farman K. Ghaffoori ◽  
Mohamed M. Arbili
Keyword(s):  
Shear Strength ◽  
Fly Ash ◽  
Crude Oil ◽  
Sandy Soil ◽  
Dry Weight ◽  
Strength Properties ◽  
Industrial Wastes ◽  
Environment Friendly ◽  
Compaction Properties ◽  
Furnace Slag

This paper deals with on stabilization of crude oil-contaminated soil. Industrial waste materials such as GGBFS and fly ash (FA) are used to achieve acceptable results for compaction and strength properties. GGBFS and FA utilized in two groups of soil (clean soil and 6% contaminated with crude oil) with varying proportions of GGBFS and FA by weight of soil. The primary goals of this study explain to establish a conclusion that GGBFS and FA are the best byproduct stabilizer material for increasing the strength and stability of soil by investigating samples of soil. In this study, the effect of GGBFS and FA on compaction properties (OMC and MDD) and direct shear strength (cohesion and angle of friction) observed. Different percentages of GGBFS (0%, 10%, and 15%) and FA (0%, 10%, and 15%) by dry weight were utilized in mixtures of sandy soil samples for different experiments. Ultimately, bases on the experimental results, it is summarized that the use of industrial wastes, i.e. GGBFS and Flyash, are affected in shear strength and compaction properties. Although, they have environment-friendly behavior for the construction project purpose.

scholarly journals GGBS And Fly Ash Effects on Compressive Strength by Partial Replacement of Cement Concrete

2019 ◽  
Vol 5 (4) ◽  
pp. 913-921 ◽  
Author(s):  
Azmat Ali Phul ◽  
Muhammad Jaffar Memon ◽  
Syed Naveed Raza Shah ◽  
Abdul Razzaque Sandhu
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Strength Properties ◽  
Partial Replacement ◽  
Optimum Level ◽  
Granulated Blast Furnace Slag ◽  
Strength Tests ◽  
Compaction Factor ◽  
Compressive Strength Of Concrete ◽  
Furnace Slag

This paper investigates the compressive strength properties of concrete with Ground Granulated Blast Furnace Slag (GGBS) and Fly Ash in concrete by partial replacement of cement. The incremental demand of cement in the construction field is a concern for environmental degradation, in this regard; replacement of cement is carried out with waste materials by using GGBS and Fly Ash. On optimum level of GGBS and Fly Ash was assessed with varied percentage from 0 to 30% for different curing days. Replaced concrete were tested with the slump, compaction factor, Vee-bee and compressive strength. Cement to water ratio was maintained at 0.47 for all mixes. The compressive strength tests were conducted for 3, 7, 14 and 28 days of curing on a M25 grade concrete. The results obtained from the slump, compaction factor, Vee-bee and compressive strength of concrete containing GGBS and Fly Ash was increased as the curing time increases. The workability of replaced concrete improved when slump value achieved 30% as compared to controlled one SF0 and the compressive strength obtained 26.30% improvement at SF9 as compared to SF0. The outcomes indicated that the addition of GGBS and Fly Ash enhances the workability and compressive strength which eventually improved the mechanical properties of concrete.

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