Title: Study of high-strength concrete creep and shrinkage for long-span bridges
Abstract: High-strength concrete creep and shrinkage tests as well as its application to the long-span pre-stressed concrete girder bridge are described in the paper.The test results include size effect of creep and shrinkage specimens and comparative analysis of creep and shrinkage.Some influences of two kinds of water reducing agent,early strength agent and silicon powder on creep and shrinkage are analyzed.The methods of equivalent thickness and size effect are proposed.The tests show that component size and humidity conditions merely affect dry creep and dry shrinkage,therefore,it is proposed that the method of shifting a similar curve is adopted to adjust humidity.If there is lack of data(results) between creep and equivalent thickness,interpolation method is adopted according to present data.Calculation reckoning should be indicated in detail and the present data should be proved.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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