自密实混凝土干缩预测的灰色理论与方法

Grey System Theory and Method of Drying Shrinkage Prediction of Self Compacting Concrete

对灰色系统理论GM(1,1)数学模型进行了研究,建立和验证了C40自密实混凝土干缩的预测模型,并对C40自密实混凝土8 d至16 d的干缩率和变化趋势作了预测。结果表明,GM(1,1)数学模型对短期干缩的预测效果较佳;对中长期干缩的预测,需要较多的训练样本才能够较为准确。

This paper creates and verifies the mathematic model of drying shrinkage of C40 SCC （self-compacting concrete） under the research of gray system theory GM（ 1,1 ）. It also gives a prediction of drying shrinkage of C40 SCC in the period of 8d to16d. The result shows that GM（1,1） is good to predict the short term shrinkage, but the medium and long-term Shrinkage forecasts based on GM（1,1） need more training samples in order to be more accurate.