scholarly journals Predictive models to determine the behavior of plastic and liquid limit of Lateratic soil for Raod construction at Egbema: Imo state of Nigeria

2012 ◽  
Vol 2 (1) ◽  
pp. 25 ◽  
Author(s):  
Solomon Ndubuisi Eluozo ◽  
C. Nwaobakata
Keyword(s):  
Predictive Models ◽  
Design Parameter ◽  
Performance Testing ◽  
Road Construction ◽  
Liquid Limit ◽  
Engineering Properties ◽  
Lateritic Soil ◽  
Design Parameters ◽  
Predictive Values ◽  
Laboratory Results

Predictive values to determine the behaviour of plastic and liquid of lateritic soil for road design and construction has been developed, this two parameters has a relationship in term of soil classification through their laboratory results, both parameters sample were subjected to through laboratory analysis for several locations, the laboratory results of both parameters were plotted to determine there behavious and limits, the results generated equations at various locations, the equations were resolved and it generated theoretical values, the model values displayed there relationship on the classification of soil for road construction. The implementation of a laboratory testing proceedure is to classify subgrade material and assess sustain properties and moisture sensitivity (heavy, collapse, softening) that can influence long-term pavement performance. Testing implementation consists of classification testing, these are (i.e., gradation analysis, Atterberg Limits and sulfate tests). Generated predictive models producing theoretical values, are engineering properties of soil testing for various parameters (i.e., swell/consolidation, R-value, unconfined compressive strength, California Bearing Ratio, and Resilient Modulus Tests). This are also design parameters that should generate predictive models that can be applied as design parameter in the study area, the study is imperative because predictive models generated and validated has ascertain proof of the workability of the models as design parameter in design of flexible pavements in the study location.

Stabilization Effect of Aluminum Dross on Tropical Lateritic Soil

2018 ◽  
Vol 39 ◽  
pp. 86-96 ◽  
Author(s):  
Ayobami Adebola Busari ◽  
Isaac I. Akinwumi ◽  
Paul O. Awoyera ◽  
O.M. Olofinnade ◽  
T.I. Tenebe ◽  
...  
Keyword(s):  
Solid Waste ◽  
Soil Sample ◽  
Road Construction ◽  
Liquid Limit ◽  
Plasticity Index ◽  
Engineering Properties ◽  
Lateritic Soil ◽  
Suitable Material ◽  
Aluminum Dross ◽  
Stabilized Soil

This experimental research assessed the engineering and geotechnical properties of Aluminum dross (ALDR). Glumly, this solid waste is usually open dumped with detrimental effect on the environment. In a bid to reduce solid waste in the environment and also improve pavement interlayer properties, this research utilized ALDR as a stabilizer for tropical lateritic soil. The lateritic soil was stabilized with the addition of this solid waste at 2% intervals from 2% to 16%. Response surface analysis was used in optimizing the strength and consistency of the stabilized soil sample. The addition of this non-conventional stabilizer helped in modifying the engineering properties of the soil sample, this had indications on the atterberg limit as the liquid limit, and the plasticity index increased from 43% to 54.61% and 28.02%- 40.8% respectively, while the plasticity index reduced from 15.1% - 13.8% signifying soil improvement. The load-bearing capacity of the sample increased from 51.22% to 62.41%. Additionally, the unconfined test showed that addition of ALDR residue improved the consistency of the stabilized soil sample. From the model equation, a positive relationship exists between CBR and UCS. R2value of 0.81 showed the robustness of the model developed. The research showed that aluminum dross is a suitable material for improving the engineering properties of the tropical lateritic soil towards a sustainable road construction.

Predictive models for the engineering properties of some Quaternary clay deposits in the U.S.S.R

1991 ◽  
Vol 7 (1) ◽  
pp. 687-694
Author(s):  
E. I. Tkachuk
Keyword(s):  
Predictive Models ◽  
Physical Property ◽  
Engineering Properties ◽  
Behaviour Pattern ◽  
Model Parameters ◽  
Deformation Characteristics ◽  
Predictive Values ◽  
Rock Types ◽  
Clay Deposits ◽  
Type Form

AbstractThe influence of indicators of composition, induration state and physical property on strength (durability) and deformation characteristics of genetically dissimilar Quaternaryclay rocks has been investigated. About 200 samples describing specific territorial geological-genetic rock types and including from 18 to 980 values for each of between 12 to 60 property indicators are analyzed. The type, form and closeness of relationships are considered together with the quantitative behaviour pattern of the most important property variations. From this the most informative indirect indicators are determined, property behaviour Statistical models are obtained and the predictive values of the model parameters are analyzed.

scholarly journals Characterisation of Lateritic Soil from Selected Locations along Ibadan – Oyo Expressway for Highway Pavement Construction

2018 ◽  
Vol 1 (March 2018) ◽  
Author(s):  
O.M Osuolale ◽  
A.A Raheem ◽  
J.R Oluremi ◽  
A.K Adeosun
Keyword(s):  
Liquid Limit ◽  
West African ◽  
Engineering Properties ◽  
Lateritic Soil ◽  
Dry Density ◽  
Sieve Analysis ◽  
Maximum Dry Density ◽  
Base Course ◽  
Pavement Construction ◽  
Highway Pavement

A good understanding of the engineering properties of lateritic soil is highly essential for effective use of the soil for highway pavement construction. The alarming rate of highway pavement failures within the study area has been attributed to paucity of information on the properties of the soil within the study zone. Therefore, the lateritic soils along selected locations along Ibadan – Oyo were characterised for their suitability for highway construction. Ten (10) lateritic soil samples were collected and they were labelled Trial Pit (TP) 1 to 10. The samples were subjected to the following laboratory tests: Sieve analysis, Liquid Limit (LL), Plastic Limit (PL), and Shrinkage Limit (SL), British Standard (BS), West African Standard (WAS), Modified AASHTO compaction and California bearing ratio. The samples were classified using AASHTO classification system. The results of the sieve analyses for percentage passing the 75 m ranged from 15.6 – 33.7%, LL, PL and SL ranged from 30.1 – 39.2%, 2.6 – 23.1%, and 2.1 – 9.3%, respectively. The maximum dry density (MDD) and optimum moisture content (OMC) for British, West African and Modified AASHTO compaction ranged from (1.48 – 1.94 g/cm’ and 10.40 – 16.40%), (1.69 – 2.40 g/cm’ and 9.60-14.40%) and (1.79 – 2.60 g/cm’ and 6.60- 11.60%), respectively. The ten samples are classified as A-2-6 soil. Based on the characterisation, all the samples are only suitable for fill and subgrade except sample TP2 that is also suitable for subbase and base course construction in highway pavement.

scholarly journals Effect of Untreated Oil Palm Fruit Fibre on the Engineering Properties of Road Construction Earth Materials

2020 ◽  
Author(s):  
Chidozie Maduabuchukwu Nwakaire ◽  
Ukomadu Chidebele Evaristus ◽  
Onu Chijioke Elijah
Keyword(s):  
Oil Palm ◽  
Road Construction ◽  
Soil Samples ◽  
Direct Application ◽  
Engineering Properties ◽  
Lateritic Soil ◽  
Palm Fruit ◽  
Road Pavement ◽  
The Earth ◽  
Control Samples

Abstract This study first evaluated the engineering properties of lateritic soil samples from three selected locations in South Eastern Nigeria (Nawfia, Okpuno, and Ugwuoba). The effect of Oil Palm Fruit Fibre (OPFF) on the properties of these soil materials was investigated, with special emphasis on road construction applicability. The samples were subjected to different tests to ascertain their index properties. Varying proportions of OPFF from 0.5% to 3% were incorporated into the soil samples and the effects were observed based on compaction and California Bearing Ratio (CBR) results. The control samples without inclusion of OPFF achieved the highest Maximum Dry Densities (MDD), the MDDs reduced linearly as the OPFF content increased. Consequently, the CBR values decreased with increase in OPFF. The reduction in MDD for the Nawfia samples ranged from 0.29% to 5.31% as the OPFF increased from 0.5% to 3%. The MDD of the Okpuno sample also reduced within the range of 1.25% to 9.51% whereas the reduction for the Ugwuoba soil is within the range of 1.55% and 9.79%. With the inclusion of the OPFF, there was up to 75% to 83% drop in CBR values of the soil rendering them very unsuitable for pavement subgrade. It was concluded that the presence of fibre depreciated the engineering properties of the earth materials. Direct application of OPFF in any part of road pavement has been dissuaded.

scholarly journals Geotechnical and Chemical Evaluation of Tropical Red Soils in a Deltaic Environment: Implications for Road Construction

2016 ◽  
Vol 8 (3) ◽  
pp. 42
Author(s):  
Akaha C. Tse ◽  
Adunola O. Ogunyemi
Keyword(s):  
Road Construction ◽  
Liquid Limit ◽  
Engineering Properties ◽  
Dry Density ◽  
Maximum Dry Density ◽  
Geological Investigation ◽  
Red Soils ◽  
Laboratory Test Results ◽  
Major Oxide ◽  
Composite Engineering

Tropical red soils which occur in the dry flatlands and plains of the eastern Niger Delta Nigeria were evaluated using combined conventional engineering geological investigation with major oxide geochemistry to determine their properties and evaluate their engineering performance in road construction. Laboratory test results indicate that the brownish materials are uniformly graded, silty clayey sandy soils. The silica to sesquoxide ratio values of 3 to 4.37 indicate that they are non-lateritic tropically weathered soils. The average values of the specific gravity, liquid limit, plasticity index and shrinkage limits are 2.67, 37%, 10% and 7.6% respectively. They are soils of low to medium plasticity. The unsoaked and soaked CBR values range from 14-38% and 3-9% respectively whereas the average undrained shear strength is 172kN/m2. Maximum dry density and optimum moisture content values fall between 1680 to 1880kN/m2 and 13-16% respectively. Generally the soils classify as A-7-6 to A-2-4 subgroups of the AASHO classification. The overall implication of these composite engineering properties is that the non-lateritic soils rate as poor to fair subgrade materials.

scholarly journals The effect of randomly distributed natural fibers on some geotechnical characteristics of a lateritic soil

2021 ◽  
Vol 3 (6) ◽  
Author(s):  
A. K. Lawer ◽  
S. I. K. Ampadu ◽  
F. Owusu-Nimo
Keyword(s):  
Natural Fibers ◽  
Road Construction ◽  
Engineering Properties ◽  
Lateritic Soil ◽  
Dry Density ◽  
Ratio Test ◽  
Maximum Dry Density ◽  
Unconfined Compression Test ◽  
Palm Fiber ◽  
Geotechnical Characteristics

AbstractWeak lateritic subgrades are more often than not encountered during road construction in Ghana. This makes it necessary to find economically efficient ways to improve the engineering properties of these marginal lateritic soils. The objective of this study is to investigate the effects of coconut fiber (30 mm, 60 mm and 90 mm fiber lengths) and palm fiber on some geotechnical characteristics of a weak lateritic subgrade. The lateritic soil was collected from the KNUST campus and blended with various percentages of the fibers varying between 0.1 and 1.0% by weight of dry soil. The mixed materials were then subjected to various laboratory tests including compaction, unconfined compression test and 4-day-soaked California bearing ratio test. From the results, it was observed that increasing the fiber content decreased the maximum dry density and increased the optimum moisture content. The inclusion of the fiber increased the soaked CBR from 7 to a maximum of 18, 22, and 25 at 30 mm, 60 mm and 90 mm fiber lengths, respectively. The unconfined compressive strength also increased from 140 to a maximum of 353 kPa, 398 kPa and 447 kPa, respectively, for 30 mm, 60 mm and 90 mm fiber lengths. Similarly, palm fiber inclusion recorded maximum soaked CBR value of 14% and UCS value of 352 kPa. These peak values were obtained at optimum fiber contents of 0.2%.

Feasibility of Reusing Marine Dredged Clay Stabilized by a Combination of By-Products in Coastal Road Construction

2019 ◽  
Vol 2673 (12) ◽  
pp. 519-528 ◽  
Author(s):  
Thien Quoc Tran ◽  
Young-sang Kim ◽  
Gyeong-o Kang ◽  
Ba Huu Dinh ◽  
Tan Manh Do
Keyword(s):  
Clayey Soil ◽  
Ph Value ◽  
Road Construction ◽  
Liquid Limit ◽  
Engineering Properties ◽  
X Ray Diffraction ◽  
Initial Water ◽  
Effective Stabilizer ◽  
By Products ◽  
Water Contents

Road construction work on poor subgrade in coastal, port, and reclamation sites is a traditional challenge for geotechnical engineers because of the typically very weak clayey soil in these domains. This research investigates the effects of adding a new green binder (Fa-RmLG), in different proportions and initial water contents, on the engineering properties of marine dredged clay (MDC) collected from Yeosu port, South Korea. The new green binder used is a combination of fly ash (Fa), phosphogypsum (G), lime (L), and red mud (Rm). In this study, five binder mixtures using different proportions of Fa, G, L, and Rm were blended into MDC with different water contents varying in a range of 1.2 to 2.0 times the liquid limit (LL) value. Tests of unconfined compressive strength, California bearing ratio, swelling, and shrinkage were performed on the stabilized MDC mixtures. As a result, large increases in the strength and bearing capacity as well as significant reductions of the swelling and shrinkage values of the stabilized MDC mixtures were recorded compared with unstabilized MDC. Scanning electric microscope and X-ray diffraction analyses were performed to observe the formation and presence of gels inside the stabilized MDC mixtures. Regarding environmental impact, the pH of the stabilized MDC mixtures did not increase above the corrosive limit (pH = 12.5) by the measured pH value. These results indicate that the new green binder can be used as an effective stabilizer for the stabilization of MDC in coastal road construction.

scholarly journals Stabilization of Lateritic Soil with Mahogany (Hardwood) Sawdust Ash

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
A.T., Oriaje ◽  
K.A. Adeyemo ◽  
O.Y. Ojo
Keyword(s):  
Road Construction ◽  
Soil Samples ◽  
Engineering Properties ◽  
Lateritic Soil ◽  
Engineering Material ◽  
Material Particle ◽  
Lateritic Soils ◽  
Naturally Occurring ◽  
Natural Moisture Content ◽  
Under Construction

Most naturally occurring laterites possess poor engineering properties despite their extensive uses for filling and subgrade materials. Few works have been reported on the use of mahogany sawdust ash (MSA) for the stabilization of lateritic soils. This investigation explores the effect of Hardwood Sawdust on the performance of lateritic soils as an engineering material. Particle size distribution, natural moisture content, specific gravity and consistency limits tests were conducted on soil samples obtained from burrow pits at Oke-Baale roundabout of Osogbo West-Bye pass road under construction for classification purpose. Engineering behaviour was also investigated through compaction and unsoaked California Bearing Ratio (CBR) performed on natural and admixed specimens, with the inclusion of 2, 4 and 6% MSA by weight of soil. Preliminary tests indicate that the natural samples were well-graded and rated medium as subgrade material in road construction. Reduction in the plasticity index (PI) of samples from 17 to 14% at 4% MSA were observed. MDD decreased to 1.54, 1.38 and 1.45 Mg/m3 at 2, 4 and 6% MSA respectively. The CBR increased to 18.8, 20.2 and 20.4% at 2, 4 and 6% MSA respectively. The research demonstrated that there is an impressive potential for MSA to enhance the mechanical properties of lateritic soils.

scholarly journals An investigation into the cause of road failure along Sagamu-Papalanto highway southwestern Nigeria

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Ubido Oyem Emmanuel ◽  
Igwe Ogbonnaya ◽  
Ukah Bernadette Uche
Keyword(s):  
Construction Materials ◽  
Road Construction ◽  
Linear Shrinkage ◽  
Liquid Limit ◽  
Dry Density ◽  
Maximum Dry Density ◽  
Southwestern Nigeria ◽  
Low Resistivity ◽  
The Road ◽  
Cause Of Failure

AbstractInvestigation into the cause of road failure has been carried out along a 60 km long Sagamu –Papalanto highway southwestern Nigeria. Geochemical, mineralogical, geotechnical and geophysical analyses were conducted to evaluate the cause of failure along the study area. The results of the laboratory tests showed that the percentage amount of fines ranges from 12 to 61.3%, natural moisture content from 6.8 to 19.7%, liquid limit in the range of 25.1–52.2%, linear shrinkage between 3.96 to 12.71%, plastic limit ranges from 18.2–35%, plasticity index ranges from 5.2 to 24.6%, free swell in the range from 5.17–43.9%, maximum dry density ranges from 1.51–1.74 g /cm3, specific gravity ranges from 2.52–2.64 and CBR between 3 and 12%. The Cone Penetrometer Test (CPT) shows a resistance value of 20–138 kgf/cm2. The major clay mineral that is predominant in the studied soil is kaolinite. The major oxides present are SiO2, Al2O3, Fe2O3, K2O, Na2O, MgO and CaO. The result of the 2D Electrical Resistivity Imaging revealed a low resistivity values for profile 2 and 3 ranging from 100 Ωm – 300 Ωm, between a distance of 20 m – 240 m along the profile to a depth of 7.60 m and a low resistivity value ranging from 50 Ωm – 111Ωm, between a distance of 80 m − 120 m along the profile to a depth of 15 m. It was concluded that the low CBR, low MDD and the class of subsoils namely A-26, A-7, A-2-7 (clayey soils) which were identified are responsible for the cause of failure experienced in the study area. These makes the soils unsuitable as road construction materials and hence, there is need for stabilization during the reconstruction and rehabilitation of the road.

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