Mineral admixture for crack self-healing of steam-cured cement-based material and preparation of mineral admixture
A technology of cement-based materials and mineral admixtures, applied in the field of building materials, can solve the problems of reduced contribution to crack self-healing, reduction of concrete mechanical properties and self-healing performance, and reduction of matrix crack self-healing potential, etc., to achieve improvement Self-healing ability, large amount of generation 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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