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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Aggregate Absorption Factor as an Indicator of the Freeze=Thaw Durability of Structural Lightweight Concrete
The purpose of this phase of the investigation was: To correlate the freeze-thaw results on concrete tested by the Texas Transportation Institute method with those obtained using the ASTM Method C 290. To develop preliminary durability acceptance criteria for concretes prepared with synthetic aggregates. In these tests, five synthetic lightweight aggregates available in Texas were used to prepare concrete for the freezing and thawing test. Freezing and thawing tests were made on concrete beams prepared with these aggregates by the ASTM Method C 290 and the results compared with previously made test using the I.T.I. method. The coarse aggregates were also subjected to a freeze-thaw tests. No apparent relationship was found between the freeze-thaw tests on the concrete and the aggregate. The absorption factor was determined for each aggregate. The Coarse Aggregate Absorption Factor for this investigation is the change in percent absorption between 100 minutes and 1,000 minutes. The following conclusions were suggested by the results of this phase of the study. The aggregate Absorption Factor of the lightweight coarse aggregates studied is a readily obtainable property which can be used to predict the durability of the resulting concrete. A relationship was established between T.T.I. and ASTM (C 290) concrete freeze-thaw tests. (Author)
Aggregate Absorption Factor as an Indicator of the Freeze=Thaw Durability of Structural Lightweight Concrete
The purpose of this phase of the investigation was: To correlate the freeze-thaw results on concrete tested by the Texas Transportation Institute method with those obtained using the ASTM Method C 290. To develop preliminary durability acceptance criteria for concretes prepared with synthetic aggregates. In these tests, five synthetic lightweight aggregates available in Texas were used to prepare concrete for the freezing and thawing test. Freezing and thawing tests were made on concrete beams prepared with these aggregates by the ASTM Method C 290 and the results compared with previously made test using the I.T.I. method. The coarse aggregates were also subjected to a freeze-thaw tests. No apparent relationship was found between the freeze-thaw tests on the concrete and the aggregate. The absorption factor was determined for each aggregate. The Coarse Aggregate Absorption Factor for this investigation is the change in percent absorption between 100 minutes and 1,000 minutes. The following conclusions were suggested by the results of this phase of the study. The aggregate Absorption Factor of the lightweight coarse aggregates studied is a readily obtainable property which can be used to predict the durability of the resulting concrete. A relationship was established between T.T.I. and ASTM (C 290) concrete freeze-thaw tests. (Author)
Aggregate Absorption Factor as an Indicator of the Freeze=Thaw Durability of Structural Lightweight Concrete
W. B. Ledbetter (Autor:in) / E. Buth (Autor:in)
1967
16 pages
Report
Keine Angabe
Englisch
Civil Engineering , Ceramics, Refractories, & Glass , Roads , Texas , Concrete , Absorption , Freezing , Physical properties , Melting , Particle size , Structural properties , Thickness , Density , Mixtures , Water , Design , Tables , Gravity , Tests
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