My work can be summarized as follows: (1) According to the characteristics of crack on concrete structure, I realize the width measurement algorithm.

本文主要完成以下工作：1根据混凝土结构裂缝图像的特点，实现了混凝土结构裂缝宽度的测量算法。

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Mechanism for effects of polypropylene fiber on crack resistance of concrete was also discussed.

同时，探讨了聚丙烯纤维对混凝土抗裂性能影响的机理。

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The paper puts forward the means for the control of plastic concrete crack based on the different reasons.

文章根据大坍落度混凝土裂缝产生的不同原因，提出了裂缝控制的措施。

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