Causes Analysis And Prevention Measures Of Concrete Surface Water Stain

The fair-faced concrete after pouring concrete is the component surface,the use of it represents the natural contour of concrete.There are many different between ordinary concrete and fair-faced concret,like smooth surface,uniform color,angular,touch damage and pollution free,natural,dignified.But in the actual engineering application,due to many various factors,it is difficult to achieve satisfactory visual quality.Such as surface marks,honeycomb,pits and other defects is difficult to stop.Among these defects,the surface blot is more difficult to prevent than others,it will affect the quality of fair faced concrete.And these defects will make us to do a lot of repair work,so compared with the ordinary concrete structure,fair-faced concret 's advantages like low cost,energy saving and low row,rapid progress are not reflected in practice.In this paper,combining with the author,s participate on highways in chengdu,collecting relevant data and documents at home and abroad.In the specific research,Using theoretical analysis,sum up the experiences of engineering,the finite element analysis method to study the;temperature field of concrete,humidity factors,template factors for the formation of a stain on the surface of the impact of as-cast concrete,The formation of the concrete surface in order to avoid the water stain,proposed in view of the concrete internal temperature,humidity,templates,raw material factors of prevention and control measures,by controlling the deformation of the concrete and enhance its ability to resist deformation to reduce surface stain occurs.Through the previous analysis,put forward a series of fair-faced concrete surface smudges on the prevention and control measures.This paper summary the fair-faced concrete surface stain control application of construction measures to Provide related experience for construction of similar projects.