Caractérisation et mise en œuvre des sols argileux destinés aux matériaux de construction cuits
(2012)
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- Abstract
- (en) Kasai oriental is one of the provinces of the DRC where the price of construction materials is higher. A cement bag, for example, is four to five times more expensive than in the other provinces. The main reason is the dependence of this province, none of these construction materials are produced locally. The most effective solution to this problem is to locally produce building materials and one of them is the clay bricks. This thesis focuses on the analysis and good understanding of the nature and behavior of Kasai oriental soils (DRC), and aims to propose solutions to their use in clay bricks manufacturing. The study is limited to the temperatures from 550°C up to 900°C. In this range, firing at 900°C would be suitable to kasaien climate realities. Eight soil samples were collected at Mbujimayi and Muene-Ditu, two major cities of the province. All samples are divided into three sites: Mbujimayi, Luetet and Nduba. Geotechnical, chemical, mineralogical and mechanical analyses were conducted at the Université catholique de Louvain in Belgium. They showed that all sites contain suitable soils for clay bricks manufacturing. Nevertheless, some soils need to be improved for their brick quality by additives. Two soils (one for Mbujimayi and another for Muene-Ditu) are completely unsuitable for producing acceptable quality bricks. Our studies also provide hydromechanical characteristics of soils which are important to understand their behavior during mining processes and other civil engineering works. Ultrasonic tests were also conducted in this work to auscultate the degree of cracking of bricks during the different stages of development. In addition to the influence of microcracking, they show a good correlation between acoustic properties of bricks and their uniaxial compressive strengths.
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Citations
Shimatu Mbuyi, J. (2012). Caractérisation et mise en œuvre des sols argileux destinés aux matériaux de construction cuits. https://hdl.handle.net/2078.5/162214