编者按:预拌混凝土的出现解决了现场搅拌混凝土的不足,但在应用的过程中也产生了一些问题,如混凝土的早期开裂问题一直是大家关注的重点,也是解决的难点,尤其是表面系数大的板、墙以及大体积混凝土施工工艺不良等原因造成的混凝土开裂问题,引发了很多不必要的纠纷。因此,找出混凝土早期开裂的原因,从而采取相应的防治措施是解决问题的关键。本期特别策划请专家及现场工作人员结合实际施工案例,就混 Editor’s note: The emergence of ready-mixed concrete to solve the shortcomings of the site mixing concrete, but also in the process of application has some problems, such as early cracking of concrete has been the focus of attention, but also to solve the difficulties, especially the surface coefficient Large panels, walls and mass concrete construction process caused poor concrete cracking problems, triggered a lot of unnecessary disputes. Therefore, to find out the reasons for the early cracking of concrete, so to take appropriate preventive measures is the key to solve the problem. Special planning for this issue, experts and field staff with the actual construction cases, mix