Cement additives
阅读：959发布：2023-05-07
专利汇可以提供Cement additives专利检索，专利查询，专利分析的服务。并且An additive for hydraulic cement comprises a major amount of sodium nitrite in admixture with a minor amount of calcium formate, optionally with triethanolamine or sodium benzoate.，下面是Cement additives专利的具体信息内容。
2. An additive according to claim 1, which also contains triethanolamine or sodium benzoate.
3. An additive according to claim 2, wherein the triethanolamine or sodium benzoate is present in a proportion of up to 40% by weight of the additive.
4. An additive according to claim 2 wherein the triethanolamine or sodium benzoate comprises about 0.1 to 10% by weight of said additive.
5. An additive according to claim 1 and water.
6. An additive according to claim 5 in which the weight ratio of water to additive is in the range of 4:1 to 1:9.
7. An additive according to claim 6 wherein the weight ratio of water to additive is in the range 2:3 to 3:2.
8. An additive according to claim 1, and a dispersant to present the additive in liquid, paste or powder form.
9. An additive according to claim 1 comprising about 48% calcium formate, and about 52% sodium nitrite.
10. An additive according to claim 2 comprising about 19.5% calcium formate, about 77.9% sodium nitrite, and about 2.6% triethanolamine.
11. A cementitious composition incorporating an additive according to claim 1.
12. A cementitious composition according to claim 11, in which the weight of additive in the composition is up to about 20%.
13. A cementitious composition according to claim 12, in which the weight of additive in the composition is about 1% to about 6%.
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