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Showing 1 to 13 of 13 for “"Frost Resistance"”.
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Studies on the frost resistance of natural stone
This work deals with the effects of freeze-thawing on the deterioration of some types of natural stone, especially stones frequently used in old buildings in Sweden. Laboratory studies were performed mainly on Gotland sandstone. This stone has been widely used in old buildings in the whole Baltic …
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Moisture Conditions and Frost Resistance of Concrete in Hydraulic Structures
… the winter conditions in Sweden, the effects of frost action may have a considerable impact on the deterioration of concrete. Both superficial and internal damage, which are suspected to have been caused by frost action, have been found in concrete in hydraulic structures. These observations have …
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The influence of ageing on the salt-frost resistance of concrete
… of the influence of ageing on the salt-frost resistance of concrete. The ageing mechanisms investigated were hydration, drying and carbonation. Specimens of ‘micro’-concrete, either with OPC alone as the binder or with silica or slag as part of the binder, were freeze/thaw tested at …
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ΣΥΜΒΟΛΗ ΣΤΗ ΜΕΛΕΤΗ ΤΩΝ ΙΔΙΟΤΗΤΩΝ ΔΟΜΙΚΩΝ ΦΥΣΙΚΩΝ ΛΙΘΩΝ ΤΗΣ ΕΛΛΑΔΑΣ
… IN PARTICULAR THERE WERE STUDIED THE FROST RESISTANCE; THE VISCOELASTIC BEHAVIOUR OF THE STONES AFTER REMAINING FOR HOURS OR DAYS ATTEMPERATURES HIGHER THAN THE ENVIRONMENT TEMPERATURE; AND THE DYNAMIC BEHAVIOUR UNDER THE INFLUENCE OF CORROSIVE GASES, CARBON DIOXIDE, SULPHUR DIOXIDE …
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Analysis of air-void system in hardened concrete from a three-dimensional perspective
The frost-resistance of concrete can be greatly enhanced by entrainment of small air bubbles in the cement paste. When the volume and distribution of the entrained air is properly controlled, the microstructure is protected from pressure exerted by freezing water. ASTM C457 “Standard Test Method …
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Fabric and Strength of Clays Stabilized with Lime
… compressive strength, porosity, permeability and frost heave resistance were investigated for cylindrical specimens of a Devonian Red-Marl containing various amounts of lime (2-14 wt%), cured for up to 24 weeks at different temperatures (25, 50 and 75°C) and in different environments (sealed, …
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A quantitative study of the crown moisture content in relation to killing temperature of winter wheat and barley
Thesis (M.S.)--Michigan State University of Agriculture and Applied Science. Dept. of Farm Crops, 1962
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Advances in measuring parameters of the air-void system in hardened concrete
To improve the freezing and thawing resistance of concrete, air bubbles are entrained and distributed evenly and closely. Evaluation of the parameters of the air-void system in hardened concrete is detailed in ASTM C457 “Standard Test Method for Microscopical Determination of Parameters of the …
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Microstructure characterization of foamed cement and concrete
… to create a network of fine bubbles that enhance frost resistance. Experience has shown that fresh air content alone cannot predict the effectiveness of the entrained air system. Instead, parameters such as bubble spacing factor measured on polished sections are more useful for assessing …
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Utilization of radiant heat for the protection of vegetation from frost damage
Thesis (M.S.)--Michigan State College of Agriculture and Applied Science. Dept. of Agricultural Engineering, 1948
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Beyond productivity- Effects of extreme weather events on ecosystem processes and biotic interactions
… beyond productivity, (2) to test if such a high resistance or resilience in response to drought regarding productivity also exists in more naturally grown plant communities and (3) to further elucidate possible mechanisms of the surprisingly large stability of the plant communities. To …
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Plasticity, Intraspecific Variability and Local Adaptation to Climatic Extreme Events of Ecotypes/Provenances of Key Plant Species
… selective pressure as a result of high drought-resistance across the whole distribution range. The impacts of drought on increment became not visible before the second year after the treatment, stressing the need for more long-time experiments in climate impact research. Even in a generally …
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Factores que afectan a la resistencia, funcionalidad y durabilidad de las aceras
… research deals with some aspects related to the resistance, functionality and durability of the materials employed in sidewalk construction. Due to the great variety of solutions for sidewalks, the study has been focussed on structures formed by granular subbases of suitable soils, concrete bases …