研究表明：改善碾压混凝土的界面过渡区，提高混凝土用水泥韧性，选用优质骨料，提高混凝土的强度及添加外加剂可以提高碾压混凝土的抗裂性能。
Research shows that the crack resistance could be increased by improving the interface transition zone, using high quality aggregate, increasing concrete strength and adding the admixtures.
在界面存在一个从高硬度到低硬度的渐变过渡区。
There is a narrow transitional zone from high hardness to low hardness on the interface.
针对新老混凝土修补界面薄弱过渡区的特点，提出改善方法。
A method was proposed to counter the feature of repair at interfacial transition zone between old and new concrete.
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