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The Civil Palaces in Gravina street, Alicante: building stones and salt weathering
This paper presents a study into the architecture and construction of the 18th Century Civil Palaces located in Gravina street (Provincial Museum of Fine Arts of Alicante), the building stones used and the mineral related decay processes that these materials have suffered. The original building stones and other stones…
Correlation of Dynamic and Steady Flow Viscosities of Food Materials
Eight commercial foods representing a wide range of viscosities (i.e. honey, condensed milk, mayonnaise, tomato ketchup, cream cheese, yogurt, process and Mozzarella cheeses) were investigated. Their steady shear viscosity and dynamic complex viscosity were determined by rheological measurements at two temperatures us…
Relationship between flexural toughness energy and impact energy of high strength fiber reinforced concrete (HSFRC)
A simple, economical and practical impact resistance test method has been developed for high strength fiber reinforced concrete (HSFRC). The results indicated that there is a logarithmic relation between flexural toughness energy (EFT) and impact energy (El) for FRC In this study, three different aspect ratios of hook…
Fourier-Transform-Rheology on linear polystyrene melts
Large amplitude oscillatory shear (LAOS) was applied to a linear polymer melt in order to study the mechanical harmonic generation in the nonlinear regime. In the nonlinear regime mechanical harmonics at 3w1, 5w1, etc. are generated under oscillatory shear with a shear frequency w1. These higher harmonics can be analy…
Condition of knowledge about the Friedel’s salt
A vast bibliography revision is done about the Friedel's salt. The structure, more possible mechanisms of formation and stability intervals in presence of other salts and temperature effect and by pH are pointed out.
Rheology of Reactive Polymer Blends: Separation of Mixing and Reatcion Steps
The crosslinking reaction in various types of polymer blends was followed by rheological measurements. Miscible polymers with controlled glass transition temperature, chain length and number of functional units per chain were synthesized by bulk radical copolymerization. Other experiments were carried out on immiscibl…
Balkan Seminar on rheology and 9th National Workshop on Rheology
Influence of water-repellent treatment on the properties lime and lime pozzolan mortars
The influence that water-repellent products can have on physical and micro-structural properties of lime mortars, and lime plus pozzolan mortars has been studied. Three water repellent products have been used. Mixes of the previously mentioned three water repellents plus a biocide product were also applied. Treatments…
Polymer and Composite Rheology
Early hydration cement Effect of admixtures superplasticizers
Early hydration of portland cement with superplasticizer admixtures of different nature has been studied. These admixtures were: one based on melamine synthetic, other based on vinyl copolymer and other based on polyacrylate copolymers. The dosage of the formers were constant (1% weigth of cement) and for the third, t…
Fundamental cocycles of tiling spaces
We study continuous cocycles defined on the set of planar tilings with values in discrete groups. Following Schmidt we show that for generalized domino tilings, L-tiles, and some systems of paths there exists a fundamental cocycle, i.e. we find a cocycle cf, so that all other continuous cocycles c are cohomologous to…
Degradation of high barrier ethylene–vinyl alcohol copolymer under mild thermal‐oxidative conditions studied by thermal analysis and infrared spectroscopy
Abstract A study of the thermal‐oxidative degradation of a high barrier ethylene–vinyl alcohol copolymer with 32 mol% of ethylene (EVOH) has been carried out by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and Fourier‐transform infrared spectroscopy (FTIR) under mild temperature conditions…
One‐step preparation of polyurethane dispersions by miniemulsion polyaddition
Abstract The application of the miniemulsion process to synthesize polyurethane dispersions with diameters of about 200 nm in a one‐step procedure, free of molecular weight restrictions, is described. With IR and NMR spectroscopy, it is shown that the reaction of the diisocyanate with the diol is the main reaction, wh…
Slag founding: kinetic study and election of a grinding system
Here we offer results obtained in laboratories and industry, concerning the kinetic study of steelfounding in cement manufacture. We choose the most suitable grinding system, valuing also its economical and environmental repercussion. The obtained results indicated that the kinetic method is extremely useful to solve…
INFLUENCE OF POINT DEFECTS ON THE SHEAR ELASTIC COEFFICIENTS AND ON THE MELTING TEMPERATURE OF COPPER
We present molecular dynamics simulations of the influence of point defects on the shear elastic properties of copper. We find that vacancies do not influence these properties at all, while the introduction of interstitials causes a large reduction of the elastic coefficients. The simulations establish a phase diagram…
Characterization of random reactive ion etched-textured silicon solar cells
Hemispherical reflectance and internal quantum efficiency (IQE) measurements have been employed to evaluate the response of Si nanostructured surfaces formed by using reactive ion etching (RIE) random texturing techniques. Random RIE-textured surfaces typically exhibit broadband anti-reflection behavior with solar-wei…
Intrinsic Fluorescence of Carboxylate-Terminated Polyamido Amine Dendrimers
The “intrinsic” fluorescence of carboxylate-terminated polyamido amine (PAMAM-CT) dendrimers is studied by two fluorescence techniques—excitation-emission matrices (EEMs) and lifetimes. The EEMs show similar spectral profiles for all dendrimer generations (a broad peak with an excitation and emission maximum of 380 an…
Molecular Design of Heat Resistant Polyimides Having Excellent Processability and High Glass Transition Temperature
The relationship between the imide structures and morphology are discussed in order to develop heat resistant polyimides having excellent processability and toughness. Addition-type imide oligomers consisting of asymmetric 2,3,3′,4′-biphenyltetracarboxylic dianhydride (a-BPDA) and 3,4′-oxydianiline (3,4′-ODA) and/or 4…
Metastable MnS Crystallites through Solvothermal Synthesis
Metastable (β and γ) and stable (α) MnS crystallites were synthesized by solvothermal reaction in various solvents at 190−200 °C. In tetrahydrofuran and benzene, the metastable MnS crystallites can be obtained. In water, ammonia liquor, ethylenediamine, α-MnS, which is converted from the metastable phase, would be obt…