Soil Groups and Subgroups of South Africa

Merwe, C. R. Van Der

doi:10.1097/00010694-196702000-00011

Cited by 11 publications

(8 citation statements)

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“…Due to the landward increase up to 70 rel.%, an illite source from the Namibian deserts is obvious. Part of the material may be derived from South African soils, which are known to be rich in illite (Van der Merwe, 1966). Due to the increasing input of smectite by rivers (e.g.…”

Section: Illitementioning

confidence: 99%

Clay mineral distribution in surface sediments of the South Atlantic: sources, transport, and relation to oceanography

1996

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Section: Illitementioning

confidence: 99%

Clay mineral distribution in surface sediments of the South Atlantic: sources, transport, and relation to oceanography

1996

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“…On average, the liquid limit was 47.6%, the plasticity index (I p ) 23. 3 . Particle size distribution tests showed that, on average, the clay-size fraction was 20.4%, siltsize fraction 62.3%, and fine sand 17.3% (only traces of medium and coarse sand were measured).…”

Section: Index Properties and Classificationmentioning

confidence: 99%

“…Based on the data shown in Table 1, the potential expansiveness of the shallow hard brown marl samples from the trial pit ranges from medium to high according to the South African chart [3,4]. On the other hand, the softer brown marl found at 6m depth is categorized as very highly expansive based on the same chart.…”

Section: Index Properties and Classificationmentioning

confidence: 99%

Classification, soil-water characteristic curve and swelling/collapse behaviour of the Nicosia marl, Cyprus

2016

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Abstract. The city of Nicosia in the island of Cyprus is situated on a sedimentary basin, the surface layers of which are dominated by an expansive clayey soil called Nicosia marl. The high potential for volume change of this soil due to the seasonal changes of water content is the leading cause of foundation related damage to the buildings and infrastructure of the city. This paper presents preliminary results of a study focusing on the investigation of the Nicosia marl mechanical characteristics pertaining to moisture changes. Samples of Nicosia marl were collected from a borehole and a trial pit in the University of Cyprus campus. The pit which was subsequently used for installing an in-situ array of sensors monitoring suction and volumetric water content at depths inside the active zone. The SoilWater Characteristic Curve (SWCC) was measured in the laboratory for the entire range of degree of saturation. The potential of swelling/collapse at various values of vertical stress was studied through a series of oedometer tests.

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“…The activity of the soil is equal to 0.97 which is, qualitatively, classified with high or very high potential swelling according to Seed [3] and Van der Merwe [4] classification respectively. 3 Experimental methodology…”

Section: Preliminary Geotechnical Analysismentioning

confidence: 99%

Assessment of the Swelling Pressure of the Green Clay of Tangier (Morocco) Compared with the Soil-Moisture Conditions

Bahlouli

Bahi

2014

MATEC Web of Conferences

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The swelling phenomenon appears seriously when changing the soil-moisture conditions. The swelling pressure induced by the expansive soil can causes unfavourable problems or instability for the civil structures. So, understanding the soil behavior is considered a valuable work for engineers and consultants in the geotechnical and civil engineering sectors. In reality, the assessment of the swelling pressure of expansive soil depends, first of all, of test conditions related to the change of soil-moisture, as it happens, the influence of the combination "loading-start wetting" and also the unloading process after saturation. To this end, we establish an experimental study on the green clay of Tangier to evaluate the swelling pressure by using oedometer apparatus. Secondly, attention is bore to the combination "initial water content-dry density", another factor related to the change of the soil-moisture, to show the influence of initial state condition on the swelling pressure.

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Soil Groups and Subgroups of South Africa

Cited by 11 publications

References 0 publications

Clay mineral distribution in surface sediments of the South Atlantic: sources, transport, and relation to oceanography

Clay mineral distribution in surface sediments of the South Atlantic: sources, transport, and relation to oceanography

Classification, soil-water characteristic curve and swelling/collapse behaviour of the Nicosia marl, Cyprus

Assessment of the Swelling Pressure of the Green Clay of Tangier (Morocco) Compared with the Soil-Moisture Conditions

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