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Study on Influencing Factors of Compressive Strength of Permeable Concrete Based on Orthogonal Test
YANG Fujian CHEN Xiaoqiang CHEN Daiguo HUANG Xiaohui LI Qian
(School of Civil Engineering and Architecture,Southwest University of Science and Technology CAS Key Laboratory of Mechanical Behavior and Design of Materials,University of Science and Technology of China Sichuan Lglitter Technology Group Co.,Ltd.)
Abstract: The static compression load,loading time,the molded layers and the tamping times are selected as the influencing factors to design orthogonal test. This paper studied the compressive strength of permeable concrete. The sensitivity and the best combination of influencing factors of compressive strength were obtained by means of range analysis and variance analysis,and two sensitive factors were selected as variables to verify the results of orthogonal test. The study results show that the primary and secondary order of the factors affecting the strength of permeable concrete is the tamping times,static compression load,loading time and the molded layers. The best combination of factors is static compression load for150 kg,loading for 6 min,3 layers,20 to 30 times for each layer of the pieces. Reasonable selection of molding method is beneficial to improve the compressive performance of permeable concrete.
Keywords: permeable concrete; compressive strength; orthogonal tests; range analysis; variance analysis; research