This paper reports the strength behaviour of concrete containing three types of recycled polyethylene terephthalate (PET) aggregate. Results are also analysed to determine the PET-aggregate’s effect on the relationship between the flexural and splitting tensile strengths and compressive strength and to know whether the relationships between compressive strength and other strength characteristic...

The effects of ionic strength of the permeating fluid on the clogging of soil filters and drainage layers are addressed using both experimental and modeling investigations. In the experimental phase, a sandy soil representative of soil filters was permeated with pore fluids containing kaolinite particles. The ionic strength of the solutions was changed using different concentrations of NaOH and...

Soil pH declined from 5.9 to 5.0 in 8 years beneath plantations of Eucalyptus saligna (Sm.) in Hawaii. In stands of Albizia falcataria, (L.) Fosberg, the soil pH change was more dramatic, declining from 5.9 to 4.6. We measured several components of soil acidity beneath four mixtures of the two tree species to gain insight on the processes responsible for the decline in soil pH. These components...

Starting from descriptive data on crop yield and various other properties, the aim of this study is to reveal the trends on soil behaviour, such as crop yield. This study has been carried out by developing web application that uses a well known techniqueCluster Analysis. The cluster analysis revealed linkages between soil classes for the same field as well as between different fields, which can...

Constructing structures on lateritic soil is challenging in geotechnical engineering due to the various physical and characteristics. Many studies investigated different stabiliser materials strengthen parameters of soil. This study used activated carbon coir fibre (ACF) stabilise soils as an environmentally friendly binder. Experiments including unconfined compressive strength (UCS) test direc...

The behaviour of the cryogenically treated En52 martensitic valve steel has been experimentally analyzed in this paper. Material samples are subjected to deep cryogenic treatment after completing the regular heat treatment. The critical properties of the valve steel like wear resistance, hardness, tensile strength and impact strength are evaluated for the cryo treated En52 valve steel samples a...

Three studies conducted in Alabama evaluated impacts associated with a clear cut harvest in three physiographic regions. Machine impacts were assessed via tabulation of soil disturbance classes, measurement of bulk density and soil strength, or a combination of the two. Soil disturbance classes were similar among all locations with untrafficked areas comprising approximately 20 percent of the h...

the influence of lime on the shear strength of soil has been known for centuries. the conventional method to increase the lime content of a soil is to add less than 10% hydrated lime in the form of powder or grout to the soil. this method is convenient for soils to be used as fill material in projects such as road construction, land fill pavements or lime pile; but is not applicable where a lar...

The significant influence of transverse isotropy on mechanical behaviours soil has long been recognised, but it is still difficult to capture well under 3D stress conditions. In this study, a method establishing non-orthogonal elastoplastic (NOEP) constitutive models for transversely isotropic (TI-soil) proposed. effect considered by extending the characteristic with fabric tensor TI-soil. exte...