The paper contains results of assessments of granulometric composition, specific and bulk density, porosity and permeability coefficients of 3 composites with different coarse sand to silt loam proportions, each with 2 slightly diversified variants of organic substance content. The composites were made and tested regarding their potential applications for constructing the carrying layer of a football pitch and were compared, concerning their granulation and water permeability, with DIN 18035 standard. It was determined that the size distribution curve of the composites with the extreme, i.e. the biggest and the smallest content of sand in some areas of standard interval differed slightly from the standard requirements. The composite best adjusted to the standard with regard to granulation was the composite with an medium content of sand. Values of permeability coefficients for more compact composites (i.e. of smaller porosity), at relatively lower values depended on granulation - unlike these which reached higher values of the coefficients, independent of the granulation, obtained at an analogous granulation but lesser cvompaction. The investigations demonstrated that all tested composites satisfied the requirements of water permeability standards, however the limit permissible value was satisfied by even the most compacted composite with the highest content of silt loam. ...
The paper presents the results of research on the suitability of local natural ground for construction of the surface of planned football field, in terms of water permeability and retention capabilitiey. Physico-water properties of silt loam collected from the area of planned football field were tested. Under conditions of very low water permeability of the tested ground in the sub-arable horizon, there is a possibility of persistent considerable moisture content in the planned football field surface after heavy rainfall. Therefore, the football pitch will be damaged, which may make difficult or even prevent football playing and worsen the esthetical values of the football field. In conclusion of conducted field and laboratory analyses it may be stated that granulometric composition, low water permeability and very high water capacity definitely disqualify the natural silt loam in the area of the designed football field as a material suitable for constructing either the carrying layer or the drainage layer of the football pitch. ...
