The influence of coarse content on the erosion of clay lumps during dredge pipe transport

In dredging and land reclamation, there are growing economic and environmental pressures to make beneficial use of fine-grained/cohesive soils. Due to these pressures, there is renewed interest in researching ways to optimise the beneficial use of fine-grained soils in dredging and reclamation.<br/>Stiff cohesive clayey soils soil break up into...

A predictive model of concrete compressive strength based on level of contamination of coarse aggregate: Experimental study and relation to the water absorption of the coarse aggregate

Recycled aggregate concrete is emphasized more and more nowadays due to its importance towards the construction industry and general welfare of our planet. Being such a significant feature with regard to universal sustainable development, every aspect of its properties should be evaluated, examined and optimized so that there is a well-known,...

Design of grabs for coarse material: Enhancing the penetration and cutting depth for limestone

Due to the constant growth of global maritime shipping, the optimization of grabs used for unloading bulk carriers is more and more relevant. Especially for a coarse material like limestone, the average payload can be improved, by altering the grab design. It is suggested that the penetration and cutting depth of a grab can be improved, which...

Core Analysis and Well Data Interpretation for Facies Extrapolation with a focus on coals and coarse sand in the Carboniferous of the Southern North Sea

In 1990, the 44/21a-6 well was drilled in the Southern North Sea. Core material was taken from the Westphalian A/B part of the core. Some of this core material was recently obtained by the TU Delft via the North Sea Core Initiative. Since the Westphalian A/B in the Pennine Basin is fluvio-deltaic in origin, it is highly variable both vertically...

Top-Down Networks: A coarse-to-fine reimagination of CNNs

Biological vision adopts a coarse-to-fine information processing pathway, from initial visual detection and binding of salient features of a visual scene, to the enhanced and preferential processing given relevant stimuli. On the contrary, CNNs employ a fine-to-coarse processing, moving from local, edge-detecting filters to more global ones...

Longshore transport of coarse-grained material: An assessment of the longshore transport behavior of the dynamic rock slope at Maasvlakte 2

The consortium Projectorganisatie Uitbreiding Maasvlakte (PUMA), consisting out of Van Oord and Boskalis, constructed a hard sea defence for the protection of Maasvlakte 2, which is the expansion of the Port of Rotterdam. This hard sea defence consists of a Dynamic Rock Slope (DRS) with a Block Dam (BD) situated in front of it. The BD is build...

A CFD study in a side heated cavity filled with coarse grained porous media

A CFD study is made to get more insight in the flow, temperature and heat distribution in a side heated cavity filled with coarse grained porous media. This was investigated for 105≤Ra≤107 and 0.01≤Ri≤100. The question is how the solid beads influence the heat transfer. It was found that the spheres dampen the flow, influence the local heat...

Aerosol Optical Properties over the Northwestern European Seas

Atmospheric particulate matter (aerosols), originating from both natural and anthropogenic sources, is affecting the regional and global climate through direct, indirect, and semi-direct effects on the radiative energy budget of the Earth-atmosphere system. In order to quantify these effects it is necessary to determine the load of aerosol...

Enhancing iterative solution methods for general FEM computations using rigid body modes.

A global scale intervention, A local scale integration: Developing the empty course grains of Tehran South

“While it is important to identify world cities, it is also important to identify the lack of connectivity. Silences are as interesting as utterances. They tell us much about the process of globalization.” (Short, 2008) Silences refer to the cities whose connectivity is less than that predicted by their population, and they are called Black...

Modelling the equalizing process of rockfill dumps with a plough: Subsea cut and transport processes

A way to equalize granular rockfill dumps at a sea or river bed is the use of a plough. A plough can be modeled as a set of straight blades in sequence. Several cutting models for dry and saturated sand are present in the literature. In cutting coarse material, the increase in pore water pressures caused by dilatancy of the grain structure play...