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Aired-time and chamotte hydraulic mortars
The aim of this research project has been to obtain aired-li me based hydraulic mortars with the addition of chamotte or burnt clay powder obtained from the ceramic industry waste. By doing this, hydraulic properties have been included into lime and hydraulic mortars with a great improvement in mechanical properties.…
Quantification of Damage Progression in a Thermally Aged Duplex Stainless Steel
Ferrite of austeno-ferritic stainless steels maintained for a long time at temperatures in the range of 270 °C to 400 °C is embrittled like the known 475 °C embrittlement of ferritic stainless steels. Deformation and damage micromechanisms of a material must be known in order to apply the "local approach to fracture"…
Mechanical Properties Degradation at Room Temperature in ZRY-4 by Hydrogen Brittleness
A hot rolled Zircaloy-4 alloy, annealed with a final cold rolling, presenting rounded grains, was studied. Hydrogen cathodic charge with a homogenization heat treatment was used to pre-charge the specimens with different hydrogen contents. Hydrogen embrittlement susceptibility analysis was held using J integral and J-…
Development of Bulk Bi2+xSr3-yCa yCu 2O8+delta Superconductors by Partial-Melting Route for Fault Current Limiters Application
The production of bulk Bi2+xSr3-yCa yCu 2O8+delta (Bi-2212) superconductors for fault current limiter application was developed via a partial-melting route. Aiming high Ic (critical current), which is the essential superconducting characteristic for application of this material in the construction of Fault Current Lim…
Rheological Properties and Shear Induced Texture Development of Thermotopic Liquid Crystalline Polymer Melts
The flow behavior of two commercial liquid crystalline polymers (LCPs), trade name Vectra B 950 and Vectra L 950 supplied by Ticona, was investigated using a capillary rheometer with a special double slit die. The pressure drops in convergent and divergent wedge passage between the two slit sections, which are influen…
TABLE OF CONTENTS
Novelda Stone: widely used within the Spanish architectural heritage
Novelda Stone is a calcareous rock, of the biocalcarenite type. It is extracted from the «Vinalopó Medio» area (Alicante, eastern Spain). Novelda stone is known as construction material from the 13th century. From final of the 19th century until the present time, it has been used in Madrid, Valencia and Alicante. In t…
Ornamental sandstones used in Ciudad Rodrigo, Salamanca: petrographic and chemical characterization of the quarry materials
Petrographic and chemical study of the Ciudad Rodrigo (province of Salamanca, Spain) sandstones reveals the existence of several types of stone (Red, Brown, Striped, Nodular and White). To some extent all of them have been used in the construction of the historical part of this city. The proximity of the quarries to t…
An analytical comparison of two commercial consolidating products applied to eocene sandstones from 16th and 19th century monuments in San Sehastián, northern Spain
The conservation of buildings in the Basque Country made of Eocene sandstone is somewhat problematical, because this type of rock is relatively unstable. This instability is due to the variable content of carbonate cement (0-28%) and the presence of K-feldspar grains (1-13%) which appear to have been dissolved by both…
Modeling Mechanical Properties Of Knitted Fabric Composites - Part I: Overview And Geometric Description
Modeling Mechanical Properties of Knitted Fabric Composites - Part III: Applications
Fractomechanical Properties of As-Cast and Austempered SG Cast Iron Between -40 °C and +20 °C
The spheroidal graphite (SG) cast iron fractomechanical response varies with the test temperature and with the microstructure parameters. In the present paper, we analyze this variation performing fractomechanical tests in a temperature range from -40°C to +20°C, doing also Charpy and tensile tests for material charac…
Modeling Mechanical Properties of Knitted Fabric Composites-Part II: Theoretical Description
Determination of iron sulphides in roofing slates from the north west of Spain
The most important production of roofing slates in the world is quarried from the Ordovician formations of the Truchas Syncline, which have the largest amount of working quarries. Roofing slates, sometimes, have crystallized iron sulphides such as pyrite, pyrrhotite and other minerals. These iron sulphides oxidise and…
Kinetic study of a grinding system in a cuban cement factory
A kinetic study realized in a moulding system in a cement factory ("Palmarito de Cauto" Santiago de Cuba) is presented. This objective of this study is the production of a pozzolonic cement PZ-250 with an addition until 40% of pozzolan. The present paper confirms the satisfactory predictions and permits to recommend t…
Effect of a Shot Peening Pre Treatment on the Fatigue Behaviour of Hard Chromium on Electroless Nickel Interlayer Coated AISI 4340 Aeronautical Steel
Multiple layer systems of coatings are considered to have larger resistance to crack propagation in comparison to coatings with simple layer. With regard to fatigue, it is possible to improve the resistance of a component with the application of shot peening treatment, whose compressive residual stresses delay or elim…
Determination of CTOD C in Fibre Metal Laminates by ASTM and Schwalbe Methods
Fibre Metal Laminates (FMLs) have arisen as a demand of the aeronautical industry to use thin sheets with high resistance to fatigue crack growth, high damage tolerance, corrosion resistance and high specific strength. Considering these requirements, FMLs are an advantageous choice when compared to metal alloys curren…