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采用L9(34)正交分析表,选取胶凝材料用量、粉煤灰掺量、矿粉掺量和水胶比四个因素,每个因素选取三个水平,分别对铁路箱梁C50配合比的10,28 d强度进行了正交分析。结果表明:对于10 d强度,粉煤灰的影响系数要高于水胶比和胶凝材料用量,矿粉影响系数最小;对于28 d强度,影响系数最大的是水胶比,其次是胶凝材料用量,影响系数最小的是矿粉用量。根据正交分析结果并结合实际工程需要,设计出满足标准和施工要求的配合比。
Using L9 (34) orthogonal analysis table, the factors such as the amount of cementitious material, the content of fly ash, the content of mineral powder and the water-cement ratio were selected. Three factors were selected for each factor, Orthogonal analysis of the intensity of 10,28 d. The results show that the influence coefficient of fly ash is higher than that of water cement ratio and cementitious material, and the influence coefficient of slag is the smallest for 10 d strength. For 28 d intensity, the influence coefficient is the ratio of water to binder, followed by gelation Material consumption, the impact of the smallest factor is the amount of ore powder. Based on the orthogonal analysis results and the actual engineering needs, we designed the mix ratio to meet the standards and construction requirements.