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US 11,214,516 B2Granted
Cement additive and method for producing same
OwnerByeong Hak Joinventor
Life of this patent
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Abstract
The present invention relates to a cement additive and a method for producing same, wherein carcinogens, including heavy metals such as hexavalent chromium and the like, generated from cement are removed while maintaining the strength and characteristic physical properties of cement. Moreover, the cement additive according to the present invention can provide cement that does not become oxidized by heat into hexavalent chromium.
Claims18
A cement additive comprising:
- 13 to 23 parts by weight of charcoal;
- 16 to 26 parts by weight of silicate;
- 16 to 23 parts by weight of ferrous sulfate heptahydrate;
- and
- 49 to 59 parts by weight of ferrous chloride tetrahydrate.
2 more elements
A cement additive comprising:
- 3 to 23 parts by weight of diatomite;
- 16 to 26 parts by weight of silicate;
- 16 to 23 parts by weight of ferrous sulfate heptahydrate;
- and
- 49 to 59 parts by weight of ferrous chloride tetrahydrate.
2 more elements
A cement additive comprising:
- 13 to 23 parts by weight of charcoal;
- 16 to 26 parts by weight of tin sulfide;
- 16 to 23 parts by weight of ferrous sulfate heptahydrate;
- and
- 49 to 59 parts by weight of ferrous chloride tetrahydrate.
2 more elements
A cement additive comprising:
- 13 to 23 parts by weight of charcoal;
- 16 to 26 parts by weight of silicate;
- 16 to 23 parts by weight of antimony;
- and
- 49 to 59 parts by weight of ferrous chloride tetrahydrate.
2 more elements
A cement additive comprising:
- 13 to 23 parts by weight of charcoal;
- 16 to 26 parts by weight of silicate;
- 16 to 23 parts by weight of ferrous sulfate heptahydrate;
- and
- 49 to 59 parts by weight of at least one of ferric chloride, ferric chloride hexahydrate, iron chloride or iron sulfate.
2 more elements
Dependencies are inferred from the claim text.