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二十年来世界各国的路面发展中,沥青路面一直居于主要地位,我国情况也是如此。但七十年代中期以后,国际上由于沥青价格上涨,水泥混凝土路面又有回升之势。我国因沥青材料短缺,近年来也修了一些水泥混凝土路面及桥面。根据有关资料介绍:在混凝土中加入体积比2％的短钢纤维,直径如普通细针,长1.3～5厘米,所拌成的混凝土能起拟制裂缝作用,并具有耐磨、不易开裂优点,初裂时的抗弯强度达98～140kgf/
In the past 20 years, the pavement development of all countries in the world has always been at the forefront of asphalt pavement. The same is true in our country. However, since the mid-1970s, due to the rising price of bitumen in the world, the cement concrete pavement picked up again. Due to the shortage of asphalt material in our country, some cement concrete pavement and bridge deck have also been repaired in recent years. According to the information on the introduction: in the volume of concrete by adding 2% of the volume of short steel fibers, such as ordinary fine needle diameter, length of 1.3 to 5 cm, mixed concrete can play the role of the proposed crack, and wear-resistant, easy to crack , The flexural strength of the initial crack reaches 98 ~ 140kgf /