Heavyweight concrete containing steel slag

Patent metadata

Field	Value
Publication number	US-10494302-B1
Application number	US-201816032569-A
Country	US
Kind code	B1
Filing date	Jul 11, 2018
Priority date	Jul 11, 2018
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

A heavyweight concrete composition comprising cement, steel slag coarse particles, steel slag fine particles, and iron ore aggregate, a wet concrete slurry of water mixed with the heavyweight concrete composition, and a heavyweight concrete which is a cured form of the wet concrete slurry. In the present disclosure, sand, which is used in conventional concretes, is replaced with steel slag fine particles to produce a sand-free heavyweight concrete.

First claim

The invention claimed is:

1. A heavyweight concrete composition, comprising:
8-15 wt % cement;
65-83 wt % steel slag; and
3-10 wt % of an iron ore coarse aggregate, each relative to a total weight of the heavyweight concrete composition;
wherein:
the steel slag is present as a mixture of steel slag coarse particles having a particle size of 2-10 mm and steel slag fine particles having a particle size of 0.1-1.5 mm; and
the iron ore coarse aggregate has a particle size of 3-7 mm.

2. The heavyweight concrete composition of claim 1 , wherein a weight ratio of the steel slag coarse particles to the steel slag fine particles ranges from 1.5:1-3:1.

3. The heavyweight concrete composition of claim 1 , wherein a weight ratio of the steel slag coarse particles to the iron ore coarse aggregate ranges from 4:1 to 20:1.

4. The heavyweight concrete composition of claim 1 , wherein a weight ratio of the steel slag fine particles to the iron ore coarse aggregates ranges from 2:1 to 10:1.

5. The heavyweight concrete composition of claim 1 , which comprises:
45-55 wt % of the steel slag coarse particles; and
20-28 wt % of the steel slag fine particles, each relative to a total weight of the heavyweight concrete composition.

6. The heavyweight concrete composition of claim 5 , consisting essentially of the cement, the steel slag coarse particles, the steel slag fine particles, and the iron ore coarse aggregate.

7. The heavyweight concrete composition of claim 1 , wherein 4-6 wt % of the iron ore coarse aggregate is present, relative to a total weight of the heavyweight concrete composition.

8. The heavyweight concrete composition of claim 1 , wherein the cement is an ordinary Portland type I cement.

9. The heavyweight concrete composition of claim 1 , wherein the steel slag comprises:
20-45 wt % of iron oxide;
3-10 wt % of aluminum oxide;
15-30 wt % of calcium oxide; and
3-18 wt % of silicon dioxide, each relative to a total weight of the steel slag.

10. The heavyweight concrete composition of claim 1 , wherein the steel slag has a specific gravity of 3-4.

11. The heavyweight concrete composition of claim 1 , wherein the steel slag has a water absorption of 0.5-5%.

12. The heavyweight concrete composition of claim 1 , which is devoid of sand.

13. A wet concrete slurry, comprising:
the heavyweight concrete composition of claim 1 ; and
3-10 wt % of water relative to a total weight of the wet concrete slurry.

14. A heavyweight concrete, comprising a cured form of the wet concrete slurry of claim 13 .

15. The heavyweight concrete of claim 14 , which has a compressive strength of 60-80 MPa according to ASTM C39.

16. The heavyweight concrete of claim 14 , which has a unit weight of 3,100-3,400 kg/m 3 according to ASTM C138.

17. The heavyweight concrete of claim 14 , which has a unit weight 3-20% greater than a substantially identical concrete not formed with the iron ore coarse aggregate.

18. A method of making the heavyweight concrete of claim 14 , the method comprising:
casting the wet concrete slurry in a mold to form a casted wet concrete; and
curing the casted wet concrete thereby forming the heavyweight concrete.

19. The method of claim 18 , wherein casting is performed at a temperature of 15-35° C.

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• Ibrahim Mohammed
• Barry Mohammed Salihu
• Alhems Luai M
• Rahman Muhammad Kalimur

Classifications

• C04B2111/00215

  Mortar or concrete mixtures defined by their oxide composition · CPC title

• C04B2111/00706

  around pipelines or the like · CPC title

• C04B2111/0031

  Heavy materials, e.g. concrete used as ballast material · CPC title

• C04B28/04

  Portland cements · CPC title

• C04B28/02 Primary

  containing hydraulic cements other than calcium sulfates · CPC title