抗渗和抗冻性不足,是桥梁结构和隧道衬砌混凝土呈现破坏的主要原因。 采取改变混凝土内部结构,首先是增加相对封闭孔的数量,也即当浸入水中时,混凝土孔隙不致被水充满,则可提高混凝土的抗渗和抗冻性。 因为在相对封闭孔隙中,借助凝胶孔能够 Impermeability and lack of frost resistance, is the main reason for the destruction of the bridge structure and tunnel lining concrete. To change the internal structure of concrete, the first is to increase the number of relatively closed hole, that is, when immersed in water, the concrete pores will not be filled with water, you can improve the concrete impermeability and frost resistance. Because of the relatively closed pores, with the help of gel pores