2017 Volume 71 Issue 1 Pages 463-469
The influence of stripping time of sheathing boards on porosity of concrete with various types of cement was considered. Parameters included season of placement, type of cement and water-binder ratio. Specimens for pore size distribution measurement were the surface part and inside part of concrete cored from the wall elements. As a result, it was confirmed that, the pore size distribution was different under the influence of type of binder and water-binder ratio, the stripping time of sheathing boards had an influence on porosity of concrete of surface part, and when the stripping time of sheathing boards was shorter, quantity of the volume of coarse pore increased. It is concluded that, the compressive strength of stripping time of sheathing boards has a marked influence on the quantity of pore volume of the surface part after stripping of sheathing boards, and when sheathing boards were removed at low concrete strength development stages, the porosity does not become dense structure of the surface part.
