This paper describes the results of three-dimensional (3D) finite element analyses investigating installation effects groups stone columns in purely cohesive soils. Installation is simplified to insertion rigid cylindrical elements with conical tips a single homogeneous soil layer (Tresca plasticity and quasi-incompressible elastic law). column simulated as reference case installations two grou...

Although High Resolution X-ray CT (HRXCT/μ-CT) has become an invaluable tool for the 3D characterization of many materials, including natural stones [1], the technique suffers from some important limitations. A first shortfall of HRXCT is the limitation of resolution; although high-end X-ray tubes have a focal spot size of 400 nm (and therefore can deliver images with this spatial resolution), ...

The weathering of Stone Mountain Granite (adamellitc) forms kaolinite, endcllite, allophane and gibbsite of which kaolinite is the most stable. Bulk density ranges from 2.65 in fresh rock to a minimum of 1.48 in saprolite. It is a good index of weathering. Abrasion pH ranges from 5.0 in saprolite to 9.3 in fresh rock, and is direct]y related to bulk density and the amount of clay mineral. Among...

When embankment is constructed on very soft soil, special construction methods are adopted. One of the techniques a piled embankment. Piled (stone columns) embankments provide an economic and effective solution to problem constructing over soils. This method can reduce settlements, time cost. Stone columns improvement for soils under light structures such as rail or road embankments. The presen...

introduction & objective: after urinary tract infection and prostatic disorders , the urine stones are the third common genitourinary diseases. demographic, environmental and genetic factors affect urine stone formation. the aim of our study is to survey epidemiologic factors in patients with urinary stones referring to educational hospitals of hamadan during 2010-2013.      materials & methods...

§1.1. im-babbar2 is often listed amongst the materials supplied to craft workers in the Ur III and Isin periods.2 The term literally means “white clay,” but it is more frequently translated, with its Akkadian correspondence ga‡‡u, as “gypsum, whitewash” (CAD G s.v.). This already introduces a problem, since gypsum and whitewash are not clay. However, this can readily be removed if we relax the ...

The conservation of stones containing swelling clay minerals such as montmorillonites is a challenging task. In this context, inhibitors (DAA) were tested and treatment based on consolidation with TEOS (ethyl silicate) was carried out sandstone minerals: the Itararé Sandstone (commercial name). laboratory experiment, inhibition swelling, pore size distribution, capillarity, colorimetric alterat...