Gradient function ultra-high performance concrete product as well as preparation method and application thereof
A concrete product, ultra-high performance technology, applied in the direction of manufacturing tools, ceramic molding machines, etc., can solve the problems of underutilization of fiber reinforcement, mechanical properties greater than actual needs, and inability to control fiber distribution state, etc., to achieve gradient distribution state The effects of controllability, good compactness and high fiber utilization efficiency
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Embodiment 1
[0041] This embodiment provides a preparation method of gradient functional ultra-high performance concrete products, including the following steps:
[0042] S1. Preparation of steel fiber-containing ultra-high performance concrete paste
[0043] Calculated in parts by weight, weigh 100 parts of Portland cement, 40 parts of microbeads, 12 parts of silica fume, 129 parts of quartz sand, 26 parts of water, 2 parts of polycarboxylate superplasticizer, 0.1 part of viscosity reducer and 15 parts of Steel fiber; wherein, the weight of the steel fiber is converted based on the set steel fiber volume content of 1.5%.
[0044]Pour the weighed Portland cement, microbeads, silica fume, and quartz sand into the mixing pot, and stir slowly for 90s. During the slow stirring process, mix 70% of the weighed water with all the water reducing agent and The mixture formed by the viscous agent is slowly poured into the stirring pot until the mixture in the stirring pot is stirred into a dough; t...
Embodiment 2～7 and comparative example 1～4
[0054] Embodiments 2 to 7 and Comparative Examples 1 to 4 respectively provide a preparation method for gradient functional ultra-high performance concrete products. Compared with Embodiment 1, the difference is that the vibration conditions of the vibration table in step S2 are changed, and each The specific vibration conditions corresponding to the embodiment and the comparative example are shown in Table 1, and the rest of the steps and parameters are consistent with the embodiment 1, and will not be repeated here.
[0055] Table 1 Embodiment 1~7 and the vibration condition of comparative examples 1~4
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[0057]
[0058] Table 2 shows the results after testing the performance of the functionally gradient ultra-high performance concrete products prepared in Examples 1-7 and Comparative Examples 1-4.
[0059] Table 2 The performance of the functional gradient ultra-high performance concrete products prepared in Examples 1 to 7 and Comparative Examples 1 to 4
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Embodiment 8～11 and comparative example 5～6
[0066] Examples 8-11 and Comparative Examples 5-6 respectively provide a method for preparing ultra-high-performance concrete products with gradient functions. Compared with Example 1, the difference is that the silica fume, water reducing agent and The amount of steel fiber, the weight fraction of silica fume and water reducing agent corresponding to each embodiment and comparative example, the volumetric content of steel fiber and the viscosity of the ultra-high performance concrete slurry made are shown in Table 3, and the remaining steps and parameters are consistent with those in Embodiment 1, and will not be repeated here.
[0067] Table 3 The amount of silica fume, water reducing agent and steel fiber and slurry viscosity in Examples 8-11 and Comparative Examples 5-6
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[0070] Table 4 shows the results after testing the performance of the functionally gradient ultra-high performance concrete products prepared in Examples 8-11 and Comparative Examp...
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Abstract
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