Modified ecological cementing nano-material and preparation method therefor
A nano-modified and gelled material technology, applied in the field of building materials, can solve the problems of micro-nano silica fume loss, surface activity decline, thermodynamic instability, etc., to optimize particle gradation, improve compactness, and improve later strength Effect
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Embodiment 1
[0025] An ecological nano-modified cementitious material, by weight, the water-cement ratio is 0.15, other components and mass percentages are as follows: 35% of cement, 3% of ecological nano-materials, 20% of limestone powder, high-quality grade I Low calcium fly ash is 40%, polycarboxylate superplasticizer is 2%.
[0026] Surface potential diagrams of silica fume particles before and after modification figure 1 As shown, the picture shows that the potential of the modified silica fume particles is converted into a positive potential; the microscopic morphology comparison of the silica fume particles before and after modification combined with the water reducer is shown in figure 2 As shown, the picture shows that the dispersion of silica fume after modification is significantly improved; the microscopic morphology of the hardened ecological nano-modified gel material and the corresponding reference sample image 3 As shown in the picture, the surface of silica fume in the ...
Embodiment 2
[0028] An ecological nano-modified cementitious material, by weight, the water-cement ratio is 0.20, and other components and mass percentages are as follows: 38.5% of cement, 5% of ecological nano-materials, 17% of limestone powder, high-quality grade I Low-calcium fly ash is 38%, and high-efficiency water reducer is 1.5%.
Embodiment 3
[0030] An ecological nano-modified cementitious material, by weight, the water-cement ratio is 0.25, other components and mass percentages are as follows: 42% of cement, 7% of ecological nano-materials, 15% of limestone powder, high-quality grade I Low-calcium fly ash is 35%, and high-efficiency water reducer is 1.0%.
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