Experimental Study on Road Properties of High Liquid Limit Soil in Yunfu Highway

2015 ◽  
Vol 9 (1) ◽  
pp. 46-51 ◽  
Author(s):  
Zhu Lei
Keyword(s):  
Unconfined Compressive Strength ◽  
Laboratory Tests ◽  
Southern China ◽  
Physical And Mechanical Properties ◽  
Liquid Limit ◽  
Engineering Properties ◽  
Filling Material ◽  
Test Results ◽  
Plastic Limit ◽  
Better Than

There are a large number of high liquid limit soil distributed in southern China. As one of the special soils commonly seen in highway construction, high liquid limit soil cannot be used in subgrade filling directly due to its special engineering properties. With the idea of saving engineering investment and protecting environment, high liquid limit soil must be improved to be qualified subgrade filling material. First, detailed laboratory tests are carried out to reveal the special properties of high liquid limit soil. Then, based on the characters of high liquid limit soil, the improving tests of liquid plastic limit, unconfined compressive strength, CBR and compaction are completed by adding different percentages of quicklime and white lime to the high liquid limit soil to study the change in the physical and mechanical properties and strength. The results show that, after being improved by lime, the high liquid limit soil can be used as subgrade filling of expressway as its liquid limit, plastic index being reduced, the strength increased and the value of CBR increased remarkably, and modified effectiveness of quicklime is better than that of white lime. Through comparison and analysis of the test results, it is found that high liquid limit soil with 5% quicklime can be used as subgrade filling material for highway since it is not only economical but also qualified to meet the requirement of improvement and strength.

scholarly journals Experimental Study on Improvement of Marine Soft Soil with Alkali Residue

2018 ◽  
Vol 53 ◽  
pp. 04021
Author(s):  
SHAO Yong ◽  
LIU Xiao-li ◽  
ZHU Jin-jun
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Void Ratio ◽  
Soft Soil ◽  
Compressive Modulus ◽  
Engineering Properties ◽  
Test Results ◽  
Use Of Resources ◽  
One Year

Industrial alkali slag is the discharge waste in the process of alkali production. About one million tons of alkali slag is discharged in China in one year. It is a burden on the environment, whether it is directly stacked or discharged into the sea. If we can realize the use of resources, it is a multi-pronged move, so alkali slag is used to improve solidified marine soft soil in this paper. The test results show that the alkali residue can effectively improve the engineering properties of marine soft soil. Among them, the unconfined compressive strength and compressive modulus are increased by about 10 times, and the void ratio and plasticity index can all reach the level of general clay. It shows that alkali slag has the potential to improve marine soft soil and can be popularized in engineering.

scholarly journals Compressibility behaviour of remoulded, fine-grained soils and correlation with index properties

2000 ◽  
Vol 37 (3) ◽  
pp. 712-722 ◽  
Author(s):  
A Sridharan ◽  
H B Nagaraj
Keyword(s):  
Liquid Limit ◽  
Plasticity Index ◽  
Engineering Properties ◽  
Test Results ◽  
Index Properties ◽  
Initial Water ◽  
Fine Grained ◽  
Wide Range ◽  
The Relationship ◽  
Water Contents

Correlating engineering properties with index properties has assumed greater significance in the recent past in the field of geotechnical engineering. Although attempts have been made in the past to correlate compressibility with various index properties individually, all the properties affecting compressibility behaviour have not been considered together in any single study to examine which index property of the soil correlates best with compressibility behaviour, especially within a set of test results. In the present study, 10 soils covering a sufficiently wide range of liquid limit, plastic limit, and shrinkage limit were selected and conventional consolidation tests were carried out starting with their initial water contents almost equal to their respective liquid limits. The compressibility behaviour is vastly different for pairs of soils having nearly the same liquid limit, but different plasticity characteristics. The relationship between void ratio and consolidation pressure is more closely related to the shrinkage index (shrinkage index = liquid limit - shrinkage limit) than to the plasticity index. Wide variations are seen with the liquid limit. For the soils investigated, the compression index relates better with the shrinkage index than with the plasticity index or liquid limit.Key words: Atterberg limits, classification, clays, compressibility, laboratory tests.

The correlation of index properties with some basic engineering properties of soils

1978 ◽  
Vol 15 (2) ◽  
pp. 137-145 ◽  
Author(s):  
C. P. Wroth ◽  
D. M. Wood
Keyword(s):  
Soil Mechanics ◽  
Liquid Limit ◽  
Engineering Properties ◽  
Cone Penetrometer ◽  
Plastic Limit ◽  
The North ◽  
The United Kingdom ◽  
Liquidity Index ◽  
Remoulded Soil ◽  
The North Sea

Experimental evidence is produced to show that it is reasonable to assign a unique strength to all soils when at their respective liquid limits, and to redefine the plastic limit as the water content at which the strength is 100 times that at the liquid limit. Combining these assumptions with ideas of critical state soil mechanics it is then possible to relate the compression index of the remoulded soil to its plasticity index, and to suggest a unique relation between remoulded strength and liquidity index, irrespective of actual values of liquid and plastic limits. Field data from the Gulf of Mexico and from the North Sea are presented in support of these relations. The predictions of strength are best for overconsolidated clays, having water contents near the plastic limit.Recently in the United Kingdom the cone penetrometer has become the recommended test for determination of the liquid limit, in preference to the Casagrande test. Having redefined the plastic limit it would be logical to use the cone penetrometer to determine this too, by using cones with different weights. Experimental data are shown to illustrate and support this proposal.

scholarly journals LOESSES NEAR KRAKÓW IN LIGHT OF GEOLOGICAL-ENGINEERING RESEARCH

2013 ◽  
Vol 35 (1) ◽  
pp. 41-57 ◽  
Author(s):  
Aleksandra Borecka ◽  
Bartłomiej Olek
Keyword(s):  
Laboratory Tests ◽  
Field Tests ◽  
Physical And Mechanical Properties ◽  
Engineering Properties ◽  
Geotechnical Parameters ◽  
Engineering Research ◽  
Loess Area ◽  
Geological Engineering ◽  
Analysis Laboratory

Abstract This work is only a preliminary study on the evaluation of geological engineering properties of loess area of Kraków. It has been expanded to include field tests (CPTU, DMT), which is an alternative to expensive and time-consuming laboratory tests. The field tests allow enough detail to track the variability of physical and mechanical properties of soils, but in many cases, provide too much information, because their interpretation is often based only on a qualitative analysis. Laboratory and field tests are complementary and should be continued in order to determine best the correlation between the measured values of the resistance probes (CPTU, DMT) and the results obtained from laboratory tests. This will provide new calculation formulas for the evaluation of geotechnical parameters of loess in situ.

UNCONFINED COMPRESSIVE STRENGTH AND MICROSTRUCTURE OF CLAY SOIL STABILISED WITH BIOMASS SILICA

2015 ◽  
Vol 77 (11) ◽  
Author(s):  
Fauziah Kasim ◽  
Aminaton Marto ◽  
Nur Amalina Abdul Rahman ◽  
Choy Soon Tan
Keyword(s):  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Clay Soil ◽  
Soft Soil ◽  
Soft Clay ◽  
Engineering Properties ◽  
Test Results ◽  
Electron Microscopic ◽  
Treated Sample ◽  
Basic Characteristics

This study presents the Unconfined Compressive Strength (UCS) and microstructure of clay soil stabilized with locally made Biomass Silica (BS) in the form of SH-85. Since the construction of highway on soft soil raises many problems due to its low strength, understanding about the basic characteristics of soft clay and mixed with BS, play important role for improving the strength of the soft clay. The study carried out had the specific objectives to determine engineering properties of soft clay, to investigate the UCS of soft clay treated with BS and to analyze microstructure of the soft soil treated by BS with respect to various curing periods. In this study, 30 samples of clay soil were prepared under various curing periods (0, 7, 14 and 28 days) and mixed with BS at various percentages (5 %, 7 % and 9 %). The test results show that BS can increase the strength of the clay soil. The 9% BS treated sample for 7 days curing time achieved UCS of 710 kPa. This was approximately 6 times greater than that of untreated soil strength. The highest strength was 1216 kPa at 28 days curing for soil mixed with 9% BS. The images of Scanning Electron Microscopic show that the voids of the clay would filled by the new component resulted by the reaction of BS stabilizer with the natural clay samples. This led to a continuous soil fabric resulting with stronger and denser soil.

Characterization and Effective Utilization of Volcanic Ash for Soil Improvement

2012 ◽  
Vol 248 ◽  
pp. 292-297 ◽  
Author(s):  
Ahmad Rifa’i ◽  
Noriyuki Yasufuku ◽  
Kiyoshi Omine
Keyword(s):  
Volcanic Ash ◽  
Soil Stabilization ◽  
Early Stage ◽  
Soft Soil ◽  
Physical And Mechanical Properties ◽  
Soil Improvement ◽  
Liquid Limit ◽  
Engineering Properties ◽  
Engineering Practice ◽  
Effective Utilization

Volcanic ash becomes environmental important issues as waste material if it is not effectively reduced or reused. In engineering practice, utilization of volcanic ash as substitution material is limited. Indonesia has a large road on soft soil and volcanic ash. The objectives of this paper are focused to study the characterization, classification and utilization of volcanic ash as soil stabilization material which give benefit in engineering practice and also be environmental friendly material. Engineering properties, mineral composition and soil mixture characteristics involve physical and mechanical properties are discussed. Result shows that the effect of addition of volcanic ash after curing time 14 days can improve the engineering properties of soft soil, decrease liquid limit, change curve of grain size distribution, increase bearing capacity, and decrease swelling potential. The soil-volcanic ash mixture with 35% of volcanic ash and 5% of lime is obtained as optimum mixture design. This result is still early stage and need further study.

scholarly journals Test on the Stabilization of Oil-Contaminated Wenzhou Clay by Cement

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Chuang Yu ◽  
Raoping Liao ◽  
Chaopeng Zhu ◽  
Xiaoqing Cai ◽  
Jianjun Ma
Keyword(s):  
Contaminated Soil ◽  
Contaminated Soils ◽  
Unconfined Compressive Strength ◽  
Liquid Limit ◽  
Soil Samples ◽  
Experimental Results ◽  
Engineering Properties ◽  
Contaminated Sites ◽  
Coastal Cities ◽  
Scanning Electron

Oil-contaminated soils have been paid much attention due to the reclamation of industrial lands in coastal cities of China. As known, oil-contaminated soils are inapplicable for construction due to their weak engineering properties, thus leading to the requirement of remediation and reclamation for oil-contaminated sites. This study presents an experimental investigation on the stabilization of contaminated soils with Portland cement. Investigations including the Atterberg limits, unconfined compressive strength, direct shear strength, and microstructure of cement-stabilized soils have been carried out, verifying the suitability of applying cement to improve engineering properties. Experimental results show that the geotechnical properties of contaminated soil are very poor. With the application of cement, the liquid limit and plasticity index of contaminated soil samples decrease dramatically, and the strength of treated soils has been improved. Experimental results from scanning electron microscope (SEM) indicate that cement-stabilized oil-contaminated soil is featured with a stable supporting microstructure, owing to the cementation between soil particles. This also confirms the applicability of cement to be served as an additive to treat oil-contaminated soils.

Study on Libyan Silt Property and Suggestions on its Application in Subgrade Construction

2014 ◽  
Vol 587-589 ◽  
pp. 1305-1310
Author(s):  
Ze Yu Zhang ◽  
Li Yun Peng ◽  
Jian Ye Wang ◽  
Abobakir Abdulali
Keyword(s):  
Mechanical Properties ◽  
Direct Shear Test ◽  
Shear Test ◽  
Physical And Mechanical Properties ◽  
Soil Improvement ◽  
Liquid Limit ◽  
Direct Shear ◽  
Test Results ◽  
Soil Slope ◽  
Capillary Water

The basic physical and mechanical properties of Libyan soil are analyzed through some experiments, including direct shear test, grading analysis test and compression test. According to the test results, the soil is named as low liquid limit silt featured by weak strength, high compressibility and permeability, which directly influences sub-grade stability, durability and pavement’s usability. In order to solve these problems, measures are discussed from two aspects, namely, soil improvement and construction method. The strength of the soil is apparently increased by the cement and lime adding, and the compressibility is decreased at the same time. And the rising height of capillary water reducing and protection forms for silt soil slope are also proved to be effective in the subgrade construction.

scholarly journals STABILISASI TANAH LEMPUNG MENGGUNAKAN KERIKIL UNTUK MENINGKATKAN DAYA DUKUNG (CBR) DI LABORATORIUM SEBAGAI BAHAN TIMBUNAN

2018 ◽  
Vol 1 (1) ◽  
pp. 41
Author(s):  
Annisaa Dwiretnani
Keyword(s):  
Carrying Capacity ◽  
Clay Soil ◽  
Soil Classification ◽  
Liquid Limit ◽  
Optimum Moisture Content ◽  
Plasticity Index ◽  
Test Results ◽  
Plastic Limit ◽  
Soil Plasticity ◽  
Cbr Test

Clay is a type of soil that has a high shrinkage when the change in water content. Construction of roads built on clay soil often damaged, eg cracked or bumpy roads would be damaged so that road before reaching the age of the plan. This study analyzes the behavior of clay in the area of Mendalo Darat, Provinsi Jambi, get maximum soil density and optimum moisture content with the addition of gravel 10%, 20%, 30% and 40%, then tested in the from of nature of the soil, the California Bearing Ratio (CBR). The results, according to the Unified Soil Classification System (USCS) methods. The addition of gravel will cause the properties of the soil Liquid Limit (LL) decreased with Plastic Limit (PL) decreased so that the Plasticity Index (PI) decreased. The addition of gravel will be working actively on the CBR test. From the test results obtained, clay that is stabilized with gravel on variations of 10%, 20%, 30% and 40% indicate an increase in crayying capacity soil and significant decrease in plasticity index. On the gravel mixture of 40% there is significant increase in carrying capacity of 11,90% of power support for the original soil, and on the gravel mixture of 40% also decreased index plasticity of 1,21 % of the original soil plasticity index. The smaller the plasticity index, the carrying capacity is getting bigger.Keywords: clay, stabilized, CBR

scholarly journals UTILIZAÇÃO DA COMPACTAÇÃO PARA REDUÇÃO DO POTENCIAL DE COLAPSO/ EXPANSÃO DE UM SOLO SILTO ARGILOSO DE MASSAPÊ DA CIDADE DE ICÓ – CE

2016 ◽  
Vol 13 (1) ◽  
Author(s):  
Gleiber Da Silva Chagas ◽  
Alfran Sampaio Moura ◽  
Andressa De Araujo Carneiro
Keyword(s):  
Grain Size ◽  
Laboratory Tests ◽  
Expansive Soils ◽  
Liquid Limit ◽  
Shallow Foundations ◽  
Housing Development ◽  
Plastic Limit ◽  
Clayey Silt ◽  
The City

RESUMO: No presente trabalho apresenta-se um estudo do comportamento de um solo silte argiloso, de massapê da cidade de Icó-CE, que será utilizado como suporte das fundações das estruturas de um conjunto habitacional. O objetivo do trabalho é averiguar a eficiência da técnica da compactação na redução do potencial de colapso/expansão do solo estudado. Foi realizada uma caracterização do solo por meio de ensaios de laboratório (granulometria, limite de liquidez, limite de plasticidade, densidade real, compactação e CBR) e campo (SPT). Além disso, realizaram-se ensaios especiais do tipo edométrico simples e duplo. Foram coletadas ainda, em uma empresa local, um total de 20 furos de sondagens à percussão (SPT) e que foram realizadas no local do estudo. Pela análise dos resultados foi possível verificar que a compactação mostrou-se uma técnica eficiente para minorar ou mesmo eliminar o potencial de expansão/colapso do solo estudado. A realização deste trabalho contribui para a área do conhecimento pois comprova, a partir do estudo de um caso real, que a compactação de solos potencialmente colapsíveis ou expansivos, de fato, reduz seu potencial a níveis aceitáveis para uso como suporte de fundações superficiais de edifícios. ABSTRACT: FIn this paper we present a study of the behavior of a clayey silt soil, the city massapê Icó-CE, which will be used to support the foundations of the structures of a housing development. The objective is to ascertain the efficiency of the technique of compression in reducing the potential for collapse / expansion of the studied soil. A characterization of the ground by means of laboratory tests (grain size, liquid limit, plastic limit, real density, compaction and CBR) and field (SPT). In addition, there were special tests of simple and double edometer type. Were also collected, in one place, a total of 20 percussion boreholes (SPT) and were performed at the study site company. By analyzing the results we observed that compaction proved to be an efficient technique to reduce or even reduce the potential for expansion / collapse of the studied soil. This work contributes to the field of knowledge as proof, from the study of a real case that the compression of potentially collapsible or expansive soils, in fact, reduces its potential to acceptable levels for use as support shallow foundations of buildings.

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