Open AccessAnalysis of Effects of Winter Construction Treatments on Fiber Concrete Samples Using an Improved Box Dimension Method
Author(s) -
Yi Li,
Cong Sheng Guan
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/562/1/012039
Subject(s) - fractal dimension , polypropylene , materials science , fractal , fiber , dimension (graph theory) , microstructure , curing (chemistry) , fractal analysis , composite material , structural engineering , environmental science , mathematics , engineering , mathematical analysis , pure mathematics
The influence of winter construction on the microstructure of hybrid fiber concrete was studied. Ordinary concrete, basalt-polypropylene (BP) fiber reinforced concrete, and steel-polypropylene (SP) fiber reinforced concrete were investigated under three different working conditions: construction during winter without any protective measures, with some construction modification, and with standard curing and protection. The characteristic parameters of the resulting concrete microstructure were obtained using the Denmark Rapidair457 test system. Because the traditional box dimension method is unable to accurately analyze the uniformity of the pore size distribution. An improved box dimension method was used to accurately determine the scale-free interval, allowing comparative analysis of the fractal characteristics of the same concrete material under different working conditions. The results show highest air content for samples constructed during winter without any protective measures, followed by samples constructed during winter but with modified construction measures, and then lowest for samples constructed using standard maintenance practices. The specific surface of pores and the fractal dimension was highest for samples constructed using standard maintenance practices, followed by samples constructed during winter with modified construction measures, and then lowest for samples constructed during winter without any protective measures. The fractal dimension increased as the air content decreased, and increased as the specific surface increased. The pore structure test results were consistent with the analysis of the fractal dimension.