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Showing 1 to 6 of 6 for “"ASTM C457"”.
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Advances in measuring parameters of the air-void system in hardened concrete
… system in hardened concrete is detailed in ASTM C457 “Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete.” Microscopical methods are used to determine traverse lengths of air voids, aggregates, and pastes on the polished surface of …
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Analysis of air-void system in hardened concrete from a three-dimensional perspective
… from pressure exerted by freezing water. ASTM C457 “Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete” is widely used for measuring the air void system. This manually conducted measurement is tedious and time-consuming, so …
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Determining the Air Void Parameters of Concrete Using Digital Image Analysis of Polarized Light Micrographs
The ASTM C457 test has long been a standard used to obtain the air void parameters of concrete materials. These air void parameters provide valuable information that has been linked to the performance of concrete under conditions such as freezing and thawing cycles. The standard test procedure …
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Developing An Alternative Hardened Concrete Air Void Characterization Method
… air void system in concrete. This study uses ASTM C457, “Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete” as a baseline characterization method and attempts to thoroughly reduce the long sample preparation and characterization time …
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Microstructure characterization of foamed cement and concrete
… the hardened air-void parameters prescribed by ASTM C457 were also estimated using an automated flatbed scanner method. There was no significant change in the spacing factors of the concrete mixtures subjected to vibration, indicating the robustness of the air-void system. The results also …
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EFFECT OF CRACK-REDUCING TECHNOLOGIES AND SUPPLEMENTARY CEMENTITIOUS MATERIALS ON SETTLEMENT CRACKING OF PLASTIC CONCRETE AND DURABILITY PERFORMANCE OF HARDENED CONCRETE
… materials on freeze-thaw durability, based on ASTM C666 Procedure B, scaling resistance, based on a modified version of Canadian Test BNQ NQ 2621-900 Annex B, and characteristics of the air-void system, obtained following ASTM C457. The research also examined the correlation between air-void …