Some geotechnical properties of two laterite soils compacted at different energies

Ogunsanwo, Olufemi

doi:10.1016/0013-7952(89)90013-6

Cited by 22 publications

(9 citation statements)

References 5 publications

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“…In addition to the BS light and BS heavy compaction tests, the West African Standard compaction tests were also carried out using a BS compaction mould with a 4.5 kg rammer falling 45 cm onto five layers, each layer receiving 10 blows (Ola, 1980;Ogunsanwo, 1989;Osinubi, 1998).…”

Section: Methods Of Testingmentioning

confidence: 99%

“…Ogunsanwo (1988) reported specific gravity values that varied from 2.707 to 2.84 for some lateritic soils from south-western Nigeria. Two other laterite soils investigated by Ogunsanwo (1989) had specific gravity values of 2.73 and 2.78, respectively. Thus, the soils in this study have specific gravities that are typical of lateritic soils.…”

Section: Properties Of Ironstone Lateritic Gravelsmentioning

confidence: 99%

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Properties of Ironstone Lateritic Gravels in Relation to Gravel Road Pavement Construction

Nwaiwu

Alkali

Ahmed³

2006

Geotech Geol Eng

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A laboratory investigation was conducted to determine properties of five samples of 'oolitic ironstone' lateritic gravel aggregates which are relevant to their use as road construction materials. Measured values of physico-chemical, physico-mechanical as well as index properties and compaction characteristics are similar to those of other lateritic, gravels occurring in West Africa which are used in road pavement applications. These lateritic clayey gravels have good workability as engineering construction materials and are rated fair to good as road aggregates in terms of probable in-situ behaviour based on water absorption values. Relationships between maximum dry unit weight and optimum moisture content as well as those between California bearing ratio and some derived soil parameters such as grading modulus, plasticity product or plasticity modulus can be described using a third-order polynomial function. The maximum dry unit weight has a bimodal frequency distribution and can be predicted from logarithm to base 10 of compaction energy with fairly good accuracy.

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Section: Methods Of Testingmentioning

confidence: 99%

Section: Properties Of Ironstone Lateritic Gravelsmentioning

confidence: 99%

Properties of Ironstone Lateritic Gravels in Relation to Gravel Road Pavement Construction

Nwaiwu

Alkali

Ahmed³

2006

Geotech Geol Eng

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“…A database was compiled by extracting data on lateritic soils from published literature (e.g Meireles, 1967;Ola, 1975Ola, , 1983Ogunsanwo, 1985aOgunsanwo, , 1985bOgunsanwo, , 1989aOgunsanwo, , 1989bOgunsanwo, , 1993 and laboratory tests. The data from published literature cover lateritic soils occurring within and outside Africa.…”

Section: Database and Statistical Analysismentioning

confidence: 99%

Comparative reliability evaluation of lateritic soils as hydraulic barriers

2005

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A numerical investigation to determine the existence or otherwise of congruence between laboratory-based and field-based models for predicting hydraulic conductivity of compacted clay liners has been conducted. The comparisons here are based on values of the reliability index estimated with the use of the two models for cases when hydraulic conductivity is assumed to be normally and lognormally distributed. The laboratory reduced Proctor and modified Proctor compactive efforts were assumed to correspond to the lowest and highest compactor weights (165 kN and 338 kN for sheepsfoot rollers only from literature) respectively. The standard Proctor compactive effort was assumed to correspond to the mean compactor weight of 261.4 kN. Reliability estimates from the laboratory-based model were consistently higher than the corresponding values from the field-based model for each of the variables common to the two models. As laboratory samples usually involve small samples which are often unrepresentative of field situations, it is considered that reliability levels estimated with the use of the field-based model provide more realistic assessment of compacted lateritic soils as hydraulic barriers. Compactor weight of 300 kN and above may be needed for effective compaction of lateritic soil liners. Reliability-based designs of lateritic soil liners should incorporate appropriate probability distribution types for variables in the field-based model.

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“…The evaluation of dam sites among many other parameters includes stability studies, simulation of the probable maximum flood (PMF), uplift pressures under the dam, depth to bedrock, stratigraphic continuity and structural mapping [1,2]. Studies have shown that the engineering properties of soils improved through compaction and/or addition of other soils with better properties [3,4,5]. Movement of water through soils depends on two factors: The forces acting upon the water molecules and the ease with which they can flow through the soil.…”

Section: Introductionmentioning

confidence: 99%

Geological and Geoelectrical Investigation of a Proposed Dam Site Using Vertical Electrical Sounding at Osuworowo Stream, Utughughu Arochukwu, South Eastern Nigeria

Ezebunanwa

Nwugha

Emeghara

et al. 2020

JGEESI

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Geophysical studies was carried out at a proposed dam site across Osuworowo stream in Arochukwu, south eastern Nigeria to investigate the depth to bedrock, possible geologic structures and foundation conditions of the dam axis. The study area is located between latitudes 5°23.58”N and 5°23.707”N and longitude 7°53.93”E and 7°53.97”E. Its elevation ranges from 90 ft to 149 ft. Six Vertical Electrical Soundings (VES) were carried out along the stream course using ABEM SAS 1000 TERRAMETER and this was done using Schlumberger configuration with maximum half current electrode separation of 55m able to reveal deep seated structures. The ip2win software was used to model the VES data to give resistivities which vary between 258 Ωm and 39000 Ωm with three and four geoelectric layer combinations of sand, sandstone, sandyshale, shalysand and ale units. The high resistivities of the geoelectric layers sand thickness and dip showing high gradient in elevation differences are indications that the site is suitable for the dam construction. The geological result shows the presence of faults this is confirmed by change in strike and dip.

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Some geotechnical properties of two laterite soils compacted at different energies

Cited by 22 publications

References 5 publications

Properties of Ironstone Lateritic Gravels in Relation to Gravel Road Pavement Construction

Properties of Ironstone Lateritic Gravels in Relation to Gravel Road Pavement Construction

Comparative reliability evaluation of lateritic soils as hydraulic barriers

Geological and Geoelectrical Investigation of a Proposed Dam Site Using Vertical Electrical Sounding at Osuworowo Stream, Utughughu Arochukwu, South Eastern Nigeria

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