Mineral admixture for self-healing of cracks in steam-cured cement-based materials and its preparation
A technology of cement-based materials and mineral admixtures, applied in the field of building materials, can solve the problems of reducing the contribution of crack self-healing, reducing the mechanical properties and self-healing properties of concrete, and reducing the self-healing potential of matrix cracks. Self-healing ability, high yield and stable effect
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Embodiment 1
[0031] A mineral admixture for the self-healing of cracks in steam-cured cement-based materials, comprising the following components in weight percentage: 35% of expansion mineral components, 55% of crystalline mineral components, 10% of calcium ion source mineral components, expansion The mineral component is UEA-H expansion agent, the crystalline mineral component is a mixture of sodium carbonate and sodium citrate added at a mass ratio of 1:6, and the calcium ion source is calcium hydroxide.
[0032] Sodium carbonate in the present embodiment also can be replaced by potassium carbonate or lithium carbonate, sodium citrate also can be replaced by potassium citrate, sodium tartrate or potassium tartrate, calcium ion source also can be replaced by calcium hydroxide and calcium oxide by mass ratio 2:1 mixture.
Embodiment 2
[0034] A mineral admixture for the self-healing of cracks in steam-cured cement-based materials, comprising the following components by weight percentage: 50% of the expansion mineral component, 40% of the crystalline mineral component, 10% of the calcium ion source mineral component, and the expansion The mineral component is UEA-H expansion agent, the crystalline mineral component is a mixture of sodium carbonate and sodium citrate added at a mass ratio of 1:5, and the calcium ion source is calcium hydroxide.
Embodiment 3
[0036] A mineral admixture for the self-healing of cracks in steam-cured cement-based materials, comprising the following components by weight percentage: 45% of the expansion mineral component, 50% of the crystallization mineral component, 5% of the calcium ion source mineral component, and the expansion The mineral component is UEA-H expansion agent, the crystalline mineral component is a mixture of sodium carbonate and sodium citrate added at a mass ratio of 1:4, and the calcium ion source is calcium hydroxide.
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