Influence of sand drying and mixing sequence on the performance of mortars with fine recycled concrete aggregates

Fine recycled concrete aggregates (fRCA, 0–4 mm) are produced from demolished concrete structures and consist of natural aggregates and old cement mortar. The presence of old cement mortar has detrimental effect on the fresh properties and trength of new concrete. This study aims to investigate the working mechanism and effectiveness of...

In-Line Resistance and Temperature Measurement of Conductive Inks

The necessary metal-based inks typically consist of silver nanoparticles dispersed in a liquid carrier medium. In order to keep the ink stable and printable, the agglomeration and sedimentation of these functional components need to be prevented as long as they are not printed onto a substrate. This is typically done by the addition of organic ...

Frame aggregation in central controlled 802.11 WLANs The latency versus throughput tradeoff

Frame aggregation is widely used in 802.11 WLANs in order to provide a significant throughput improvement. However, the latency increase that comes as a counterpart can reduce the quality experienced by the users of applications with real-time constraints. This letter explores the throughput versus latency tradeoff in the context of central...

The sustainable city [De duurzame stad]

Urban Dynamics. Opportunities for sustainability. Cities and urban agglomerations have shown strong growth in recent decades. Not just worldwide, but also in the Netherlands. Some 44 percent of the country’s population now lives in cities, even though urban areas cover just 13 percent of its territory. According to forecasts by Statistics...

Applying machine learning techniques for forecasting flexibility of virtual power plants

The validity and applicability of using a generic exposure assessment model for occupational exposure to nano-objects and their aggregates and agglomerates

Background: Control banding can be used as a first-tier assessment to control worker exposure to nano-objects and their aggregates and agglomerates (NOAA). In a second tier, more advanced modelling approaches are needed to produce quantitative exposure estimates. As currently no general quantitative nano-specific exposure models are available,...

Occupational exposure to nano-objects and their agglomerates and aggregates across various life cycle stages: A broad-scale exposure study

Hydrodynamic perspective on asphaltene agglomeration and deposition

In this work, we propose a detailed numerical model for asphaltene agglomeration and deposition, as induced by a resolved turbulent liquid carrier phase flow, in which transport, breakup, and re-entrainment are also taken into account. Asphaltene phase separation is represented by the appearance of adhesive primary particles, which bond upon...

Kinetic energy density and agglomerate abrasion rate during blending of agglomerates into powders

Problems related to the blending of a cohesive powder with a free flowing bulk powder are frequently encountered in the pharmaceutical industry. The cohesive powder often forms lumps or agglomerates which are not dispersed during the mixing process and are therefore detrimental to blend uniformity. Achieving sufficient blend uniformity requires...

Water migration mechanisms in amorphous powder material and related agglomeration propensity

The agglomeration phenomenon of amorphous particulate material is a major problem in the food industry. Currently, the glass transition temperature (Tg) is used as a fundamental parameter to describe and control agglomeration. Models are available that describe the kinetics of the agglomeration process as a function of the distance of the...

Adlayers of palladium particles and their aggregates on porous polypropylene hollow fiber membranes as hydrogenization contractors/reactors

Principal approaches for the preparation of catalytic membrane reactors based on polymer membranes containing palladium nanoparticles and for the description of their characteristics are presented. The method for the development of adlayers composed of palladium nanoparticles and their aggregates on the surface of hydrophobic polypropylene...

Nanotechnologies, engineered nanomaterials and occupational health and safety - A review

The significance of engineered nanomaterials (ENM) and nanotechnologies grows rapidly. Nanotechnology applications may have a positive marked impact on many aspects of on human every day life, for example by providing means for the production of clean energy and pure drinking water. Hundreds of consumer nano-based products are already on the...

Net charge affects morphology and visual properties of ovalbumin aggregates

The effect of ovalbumin net charge on aggregate morphology and visual properties was investigated using chromatography, electrophoresis, electron microscopy, and turbidity measurements. A range of differently charged ovalbumin variants (net charge ranging from -1 to -26 at pH 7) was produced using chemical engineering. With increasing net charge...

Assessing the extent of protein intermolecular interactions at air-water interfaces using spectroscopic techniques

There is an ongoing debate about whether a protein surface film at an air-water interface can be regarded as a gelled layer. There is literature reporting that such films show macroscopic fracture behavior and a rheology comparable to three-dimensional protein bulk-networks. If this is the case, a complete description of the formation of...

Aggrecan turnover in human intervertebral disc as determined by the racemization of aspartic acid

We have used the racemization of aspartic acid as a marker for the "molecular age" of aggrecan components of the human intervertebral disc matrix (aggregating and non-aggregating proteoglycans as well as the different buoyant density fractions of aggrecan). By measuring the D/L Asp ratio of the various aggrecan species as a function of age and...

Early Agglomeration Recognition System - EARS: From bench-scale testing to industrial prototype

<p class=MsoNormal style="MARGIN: 0cm 0cm 0pt; mso-hyphenate: none"><wegspanlang=EN-GB><wegfont face="Times New Roman">This report describes the development and testing of a method to monitor and control agglomeration in a bubbling fluidised-bed combustor. EARS - for Early Agglomeration Recognition...

VerkennEND<br />SETe evaluatie kwaliteitsbeïnvloeding poederkoolvliegas: bijstoken van biomassa in een poederkoolcentrale of bijmenging van biomassa-assen met poederkoolvliegas

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