High-performance concrete prepared by adopting rice hull ash, silicon ash and graphene oxide as admixtures and preparation method thereof
A high-performance concrete and admixture technology, applied in the field of building materials, can solve the problems of few or few super-high-strength high-performance concrete, and achieve the effects of improving mechanical properties, improving efficiency, and improving microscopic cracks
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[0023] Example 1
[0024] 1. The preparation process of high-performance concrete prepared with rice husk ash, silica fume and graphene oxide as admixtures:
[0025] (1) The preparation process of the composite admixture: After the rice husk is incinerated at low temperature for 1 hour, it is ground for 1 hour with a ball mill to obtain nano-SiO 2 Rice husk ash with a content of more than 90% is mixed with angstrom silica fume and graphene oxide to obtain a composite admixture.
[0026] (2) Then mix the cement, admixture, coarse aggregate, fine aggregate, water reducing agent and water according to a specific ratio to prepare high-strength and high-performance concrete.
[0027] The graphene oxide (GO) used is the graphene oxide aqueous solution of Suzhou Carbon Technology Co., Ltd. (Suzhou Carbon), and the detailed information is shown in Table 1. The silica fume used is purchased from Elkem International Trading (Shanghai) Co., Ltd., model 920U, cement Purchased from Guangzhou Pearl...
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[0045] Example 2
[0046] Based on the test results obtained in Example 1, it can be seen that when the compounding ratio of silica fume and rice husk ash is 10% SF + 2% RHA, the effect of synergistically improving various properties of cement-based materials is the most excellent, so 10% SF + 2 %RHA compound admixture instead of cement as the benchmark group, under a fixed water-binder ratio, explore the effect of different dosages of graphene oxide (0%, 0.001%, 0.005%, 0.01%) on the working performance and mechanical properties of ultra-high-strength high-performance concrete influences.
[0047] The concrete was prepared according to the formula in Table 5, and the performance test results of the concrete are shown in Table 6.
[0048] Table 5 Formulas for preparing high-performance concrete with rice husk ash, silica fume and graphene oxide as composite admixtures
[0049]
[0050] Note: Water consumption needs to be deducted from the water in the GO aqueous solution
[0051] Tabl...
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