A new suction method for the measurement of pore size distribution of filter layer in permeable formwork

A water suction method for determining pore size distributions have been developed that is especially used for, but not restricted to, characterizing filter layer in permeable formwork. The laboratory method was presented for determining the distributions of pore sizes. The construction and the use of the apparatus are outlined. Results from three kinds of permeable formwork are analyzed and interpreted. The test results are compared with that obtained by the existing theories to predict the pore size distribution of nonwoven structures. The comparisons between measured and predicted pore size distributions confirmed the good accuracy of the Faure model.