scholarly journals Volume Change Control of High Plasticity Clay by the Stabilization of Fine-grained Cements

2017 ◽  
Author(s):  
Murat Mollamahmutoğlu ◽  
Eyubhan Avcı ◽  
Altan Erdem
Keyword(s):  
Volume Change ◽  
High Plasticity ◽  
Fine Grained ◽  
High Plasticity Clay

scholarly journals The effect of egg shell powder on the compression strength of fine-grained soil

2018 ◽  
Vol 195 ◽  
pp. 03011
Author(s):  
Niken Silmi Surjandari ◽  
Raden Harya Dananjaya ◽  
Ely Jauharotus S
Keyword(s):  
Low Cost ◽  
High Plasticity ◽  
Test Results ◽  
Fine Grained ◽  
Structure Changes ◽  
Liquidity Index ◽  
Fine Grained Soil ◽  
Problematic Soils ◽  
High Plasticity Clay ◽  
Egg Shell

High plasticity clay has several problems including a high plasticity index and low bearing capacity. Stabilization of high plasticity clay is still extensively explored, especially for a low-cost and easily obtainable material. The purpose of this research is to study the effect of eggshell powder (ESP) on high plasticity clay. This research uses a soil sample obtained from Jenggrik Village, Ngawi Regency, East Java. Furthermore, the problematic soils at liquidity index of 0 - 1.25 are mixed with the ESP in various percentages, i.e. 0%, 10%, 15%, 20%. Several laboratory tests have been conducted to examine the effects of the mixtures, such as index properties, unconfined compressive strength and Scanning Electron Microscopy (SEM). The result indicates that the liquidity index affects the soil stabilized by ESP. SEM test results show that the soil structure changes, it becomes dense on a mixture containing 10% ESP. The conclusion of this research is that the higher the liquidity, the lower the strength.

Strength Development in Cement Admixed Fine-Grained Dredged Marine Soils

2015 ◽  
Vol 802 ◽  
pp. 272-276
Author(s):  
Amira Azhar ◽  
Chee Ming Chan
Keyword(s):  
Bottom Ash ◽  
Strength Development ◽  
High Plasticity ◽  
Fine Grained ◽  
Effect Of Water ◽  
Curing Period ◽  
Binder Ratio ◽  
High Plasticity Clay ◽  
Water Binder Ratio

Dredged marine soils (DMS) are considered as wastes and are currently not being recycled. Solidification of DMS needs to be undertaken before the materials can be reused.This study focused on the development of strength of three solidified fine-grained DMS which are high plasticity clay (CH), high plasticity silt (MH) and low plasticity silt (ML) admixed with cement and bottom ash. This paper discussed the effect of water-binder ratio and curing period on the strength development of the solidified DMS. The results show that the strength increased with prolonged curing. The strength increased when the water-binder ratio was decreased. CH samples with water-binder (w/b) ratio =1 has the highest strength that are up to 4.7 MPa. Optimal w/b ratio for solidified DMS is w/b=3.

scholarly journals Influence of Waste Toothbrush Fiber on Strength and Freezing–Thawing Behavior in High Plasticity Clay

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Fatih Isik ◽  
R. Kagan Akbulut ◽  
A. Sahin Zaimoglu
Keyword(s):  
Clayey Soil ◽  
Polypropylene Fiber ◽  
Engineering Properties ◽  
Waste Materials ◽  
High Plasticity ◽  
Fine Grained ◽  
Reinforcement Material ◽  
Fine Grained Soil ◽  
High Plasticity Clay ◽  
Waste Polypropylene

AbstractThe use of waste materials in civil engineering applications has gained importance nowadays. Consuming limited natural resources and increasing waste disposal costs have led researchers to evaluate waste materials for different geotechnical applications. In this respect, some waste materials are used as reinforcement in soils to improve their engineering properties. The main objective of this paper was to investigate the usability of waste polypropylene fiber as a reinforcement material in high plasticity fine-grained soils. For this purpose, waste toothbrush bristle (WTB) was used as a polypropylene fiber reinforcement material and added to fine-grained soil at ratios of 0.2%, 0.4%, 0.6% and 0.8% by dry total weight. The effect of WTB on freezing–thawing behavior and unconfined compression strength of unreinforced and reinforced clayey soil was evaluated. The results indicated that addition of WTB to high plasticity clay improved its behavior against freezing–thawing. Also, undrained shear strength increases with respect to increment in WTB ratio.

Wetting-induced volume changes in compacted silty clays and high-plasticity clays

2008 ◽  
Vol 45 (2) ◽  
pp. 252-265 ◽  
Author(s):  
Valéry Ferber ◽  
Jean-Claude Auriol ◽  
Yu-Jun Cui ◽  
Jean-Pierre Magnan
Keyword(s):  
Quantitative Description ◽  
Silty Clay ◽  
High Plasticity ◽  
Stress Tests ◽  
Swelling Potential ◽  
Volume Changes ◽  
Compaction Rate ◽  
Fine Grained ◽  
Microstructural Model ◽  
High Plasticity Clay

Wetting-induced deformations of compacted fine-grained soils are of particular interest in earthworks engineering, where embankment design needs to take into account potential future water-content variations. The influence of compaction rate on swelling potential and, more generally, wetting-induced deformations are analyzed in this paper on the basis of an original physical microstructural model. The interpretation of macroscopic experimental results obtained on a high-plasticity clay and a silty clay shows that the model enables quantitative description of intra- and inter-aggregate pore volume changes due to wetting. Using this approach, a fundamental difference was observed between the high-plasticity clay and the silty clay in wetting tests under vertical stress: tests performed on the high-plasticity clay can be analyzed using a microstructural model, whereas this model is not relevant for the analysis of silty clay behaviour, which is better interpreted in the framework of a conventional elastoplastic model. The interpretations were compared to microstructure observations, which support the main tendencies deduced from the model.

Stabilization of clayey subgrade with waste pumice for road infrastructure

2015 ◽  
Vol 22 (5) ◽  
Author(s):  
Ömür Çimen ◽  
Mehmet Saltan ◽  
S. Nilay Keskin
Keyword(s):  
Mechanical Properties ◽  
Road Construction ◽  
High Plasticity ◽  
Test Results ◽  
Index Properties ◽  
Compression Tests ◽  
Unconfined Compression ◽  
Swelling Potential ◽  
Project Costs ◽  
High Plasticity Clay

AbstractHigh-plasticity clayey subgrade, which is unsuitable for road construction, may sometimes occur along highway routes. In such cases, engineers need to change the route of a highway project, resulting in an increase in road length and project costs. In this study, waste pumice was examined for stabilization of high-plasticity clayey subgrade, which is inappropriate for road construction. For this purpose, the physical and index properties of clay and pumice were determined. Then, the pumice was mixed with high plasticity clay at different ratios by weight. By performing standard Proctor compaction tests on the mixtures, the effects of adding pumice on compaction were also studied. Unconfined compression tests and California bearing ratio (CBR) tests were performed on all pumice-clay mixtures, and the test results and the CBR ratios were compared for each sample, respectively. The results showed that pumice stabilization improved the mechanical properties and reduced the swelling potential of high plasticity clayey subgrade.

Analysis of Three Dimensional Nonlinear Coupled Finite Element Based on some Concrete Rock-Fill Dam

2014 ◽  
Vol 998-999 ◽  
pp. 522-525
Author(s):  
Juan Juan Jin ◽  
Min He ◽  
Peng Liu
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
High Plasticity ◽  
Element Analysis ◽  
Rock Fill ◽  
Arching Effect ◽  
Earth Core ◽  
Gravel Soil ◽  
High Plasticity Clay ◽  
The Difference

As the future highest dam in the world, Shuang Jiang Kou rock-fill dam was the water retaining structure of homonymous hydropower station, a controlling engineering on Da Du River hydropower development, which is under design now. This dam is a central earth core dam with a height of 312 meters. A type of gravel soil stiffer than clay, which is made by artificial compounding of clay and gravel, is introduced to reduce the difference in displacement of earth core and rock filled shell zone. Because of the introduced less flexible central core, a more remarkable arching effect of the abutment on earth core might occur simultaneously. A three dimensional coupled nonlinear finite element analysis is carried out to study the three dimensional arching effect of Shuang Jiang Kou rock-fill dam. Computation results show that the arching effect is much notable. Then an innovation is proposed in design, in which a contact high-plasticity clay layer is introduced. It is verified that this innovation is effective and necessary.

Water Retention and Compressibility of a Lime-Treated, High Plasticity Clay

2013 ◽  
Vol 31 (4) ◽  
pp. 1171-1185 ◽  
Author(s):  
Maria Mavroulidou ◽  
Xiwei Zhang ◽  
Michael J. Gunn ◽  
Zeljko Cabarkapa
Keyword(s):  
Water Retention ◽  
High Plasticity ◽  
High Plasticity Clay

Nature, genesis and industrial properties of the kaolin from Masirah Island, Oman

Clay Minerals ◽  
2017 ◽  
Vol 52 (3) ◽  
pp. 275-297 ◽  
Author(s):  
Bernhard Pracejus ◽  
Iftikhar Ahmed Abbasi ◽  
Salah Al-Khirbash ◽  
Mohammad Al-Aamri
Keyword(s):  
Ceramic Materials ◽  
Raw Material ◽  
Sulfide Deposit ◽  
High Plasticity ◽  
Shallow Marine ◽  
Secondary Minerals ◽  
Fine Grained ◽  
Coastal Marine ◽  
Mode Of Occurrence ◽  
Industrial Use

AbstractKaolin deposits >10 m thick overlie unconformably a Mesozoic ophiolite sequence at Jabal Humr, Masirah Island, Oman. The clay's mineralogical and chemical composition, plasticity and moisture content were measured to determine its genesis and suitability for commercial usage. The clay-rich raw material contains 76–94% kaolinite and varying amounts of quartz (micro sheets coating kaolinite) and calcite as well as secondary sulfates. The mode of occurrence, an associated shallow-marine iron oolite/pisolite unit, various secondary minerals which can only form in a gossan environment (oxidation zone of a much older sulfide deposit), and minerals such as gypsum that are highly unstable within a laterite, have led to the conclusion that the Jabal Humr kaolinite deposit cannot have the lateritic origin that has been suggested previously. Rather, it must have formed in a coastal marine environment with a subsequent strong geochemical overprint from the underlying gossan environment, after being enveloped by Tertiary carbonates. A high plasticity and its light colour after firing indicate that this material is suitable for industrial use, especially in pottery. Occasional high contents of up to ∼25% extremely fine-grained quartz (sheet-like, <50 nm thick) reduce the need for quartz addition during the processing for ceramic materials; such natural kaolinite-quartz mixtures already produce a suitable blend of materials. The possible occurrence of spalling during or after firing, caused by the sporadic presence of accessory calcite, can be avoided by by further addition of quartz which leads to the formation of calcium silicate.

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