Compound-doped mineral admixture for reinforced concrete structure of oceanographic engineering
A mineral admixture and reinforced concrete technology, which is applied in the field of compound mineral admixtures, can solve the problems of decreased stability of alkaline passivation film, reduction of concrete alkalinity, corrosion of steel bars, etc., to increase the performance of anti-rust molecular migration , Improve corrosion resistance and reduce the cost of enterprise use
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Embodiment 1
[0037] Embodiment 1: This kind of composite mineral admixture used for marine engineering reinforced concrete structure, according to the following component formula by mass percentage: fly ash: 35%; Zeolite: 5%; Slag: 40%; Silica fume: 10%; rust inhibitor: 5%; dispersant: 5%.
[0038] The formula is a new type of concrete admixture organically compounded by various ultrafine mineral components through a specific process. It is mainly based on slag powder and fly ash, and its mechanical properties such as early and late strength are further improved, so as to achieve reinforced concrete. Corrosion resistance, reducing the heat of hydration of concrete, improving the durability of concrete, and improving the early strength decline of concrete caused by the addition of a large number of mineral admixtures, and is suitable for marine reinforced concrete projects with severe chloride ion and sulfate erosion.
Embodiment 2
[0039] Embodiment 2: This kind of composite mineral admixture used for marine engineering reinforced concrete structure is formulated according to the following mass percentages: fly ash: 20%; zeolite: 10%; slag: 35%; silica fume: 5%; rust inhibitor: 15%; dispersant: 5%; shrinkage reducer: 10%.
[0040] The shrinkage-reducing component mixed in this formula can reduce the shrinkage of concrete, especially the early shrinkage, by adjusting the surface tension of the solution and other physical means. Improve the corrosion resistance of concrete. At the same time, the compound migratory rust inhibitor mixed in is beneficial to form a passivation film on the surface of the steel bar, and is suitable for reinforced concrete structures in severely corroded areas such as engineering and water level change areas.
Embodiment 3
[0041]Embodiment 3: This kind of composite mineral admixture used for marine engineering reinforced concrete structure is formulated according to the following mass percentages: fly ash: 20%; zeolite: 5.5%; slag: 30%; silica fume: 5%; rust inhibitor: 15%; dispersant: 3.5%; shrinkage reducer: 5%; anti-crack agent: 16%.
[0042] The formula is mixed with an appropriate amount of composite anti-crack components, so as to reasonably and effectively compensate the shrinkage of concrete, reduce cracks and micro-cracks caused by shrinkage of concrete, and improve the anti-crack and impermeability of concrete. The compound anti-cracking component added not only contains the common anti-cracking agent that works in the early stage, but more importantly, it is compounded with the long-term micro-cracking anti-cracking component that has a good anti-cracking effect in the later stage, so that it is easier to ensure a good performance in compensating the shrinkage of the concrete. Effect....
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