Damage to buildings on expansice soils in Kibaha, Tanzania

Lucian, Charles; Hintze, Staffan; Stille, Håkan

doi:10.4314/jbld.v13i2.41406

Cited by 11 publications

(22 citation statements)

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“…4, the swell pressure increases as the IMC decreases for the same initial dry density which is greater than 1.25 g/cm 3 . A low IMC is accountable for absorbing more water to supply the water demand for mineral expansion which results excessive swelling or high swelling pressure development in the volume constrained conditions.…”

Section: The Effects Of Initial Dry Density and Moisture Content On Smentioning

confidence: 99%

“…Further, no significant effects of IMC on the measured swelling pressure can be seen up to 1.25 g/cm 3 dry density of the soil. When the soil's initial dry density is increased beyond 1.25 g/cm 3 , the swelling pressure increases with decreasing the IMC. Fig.4 Variation of swelling pressure with initial dry density and IMC When the dry density is low, more void volume is expected in the soil specimen.…”

Section: The Effects Of Initial Dry Density and Moisture Content On Smentioning

confidence: 99%

“…The wet mass required to achieve a predetermined dry density (e.g: 1.30 g/cm 3 , 1.50 g/cm 3 ) in a compacted specimen of 100 mm diameter and 50 mm height was measured. The measured soil mass was poured into a stainless steel ring of 100 mm diameter and it was statically compacted (by pressing the soil using compression apparatus) to achieve the specimen height of 50 mm.…”

Section: Sample Preparation Proceduresmentioning

confidence: 99%

“…The soil was mixed with water to achieve three different IMCs; 10%, 20%, and 30%. The soil with each moisture content was used to obtain 4 -7 samples with different initial dry densities ranging from 1.00 -1.68 g/cm 3 . The diameter and the height of all specimens were 76.0 mm and 25.5 mm, respectively, and grease was not applied around the internal perimeter of the specimen ring.…”

Section: The Effects Of Initial Dry Density and Moisture Content On Smentioning

confidence: 99%

“…Swelling pressure which is defined as the pressure required holding the soil at constant volume when water is added can simultaneously cause lifting, or heaving of structures whereas differential settlement can be caused by shrinkage [3]. Failures result when the volume changes are irregularly distributed underneath the foundation.…”

Section: Introductionmentioning

confidence: 99%

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Factors Affecting the Swelling Pressure Measured by the Oedemeter Method

Jayalath¹

2016

Geomate

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Expansive soils are common in arid and semi-arid climate regions of the world and cause severe problems on civil engineering structures. The Swelling potential of the expansive soil mainly depends upon the properties of soil and environmental factors, and stress conditions. Swelling pressure is a key parameter used in designing structures in and on expansive soil. The swelling pressure of soil is measured in the laboratory using a representative soil samples. The size and the surface friction of the sample ring used in the swelling pressure test have effects on the measured swelling pressure and they have not properly been investigated. In this study, a series of constant volume swelling tests were conducted using an automated consolidation-swell apparatus to evaluate the effect of sample ring size, ring friction, initial dry density, and initial moisture content (IMC). Test results indicate an exponential growing trend of swelling pressure when the dry density is increased. Similarly, high swell pressures are achieved when the IMC is increased for the same dry density. A higher swelling pressure was measured when the friction of the specimen ring was reduced. The measured swelling pressure increases with increasing the height of the sampling ring and it decreases when the ring diameter is increased. Therefore, it is recommended to use a standard sample ring reducing inside wall friction using lubricants when measuring the swelling pressure in the laboratory. Further, the sample ring size, initial density and initial moisture content of soil should be given when reporting swelling pressure of soil.

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Section: The Effects Of Initial Dry Density and Moisture Content On Smentioning

confidence: 99%

Section: The Effects Of Initial Dry Density and Moisture Content On Smentioning

confidence: 99%

Section: Sample Preparation Proceduresmentioning

confidence: 99%

Section: The Effects Of Initial Dry Density and Moisture Content On Smentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Factors Affecting the Swelling Pressure Measured by the Oedemeter Method

Jayalath¹

2016

Geomate

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膨润土和波斯铁木在酸性矿井废水处理中的吸附效率

Ntwampe

2023

Mine Water Environ

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We conducted jar tests on the efficacy of using various mixtures of pulverized bentonite clay and Parrotia persica plant to treat AMD from a mine in Mogale City, South Africa without adding alkalinity. Two nearly identical sets of experiments were conducted using the same materials after they were rinsed using distilled and potable waters, respectively, to remove impurities, and then dried in an oven at 60 °C for 24 h, after which they were pulverized again. The pH, electrical conductivity, oxidation reduction potential, turbidity, and metal concentrations were measured before and after the experiments. The samples were treated in a jar test using standard procedures, i.e. rapid and slow mixing and settling for 1 h. The results showed that increasing the concentration of P. persica relative to the bentonite improved treatment effectiveness and that the highest turbidity removal (> 96.8%) was produced by rinsing the mixtures with potable water, drying them, and then pulverizing them again. Potentially toxic metals were removed by more than 93.7%. The morphological structure of the SEM micrographs indicate that the removal mechanism involves both physical and chemical phenomena and that the clay and P. persica are both important, particularly to the physical aspects.

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An Analytical Bending Solution for Analysis and Design of Long Beams Constructed on the Expansive Soil

Musa

2018

Arab J Sci Eng

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Damage to buildings on expansice soils in Kibaha, Tanzania

Cited by 11 publications

References 0 publications

Factors Affecting the Swelling Pressure Measured by the Oedemeter Method

Factors Affecting the Swelling Pressure Measured by the Oedemeter Method

膨润土和波斯铁木在酸性矿井废水处理中的吸附效率

An Analytical Bending Solution for Analysis and Design of Long Beams Constructed on the Expansive Soil

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