Long span bridge designs

1. A beam for use in construction of a long span bridge structure comprising:

a reinforcing member having a geometric configuration selected from a group consisting of: a “U” tub beam with composite deck system; a decked I-beam; and an adjacent box beam;

said geometric configuration formed of a UHPC mix having:

an initial compressive strength, f′ ci =10.0 ksi;

a compressive strength at service, f′ c =17.4 ksi;

a modulus of elasticity of concrete, E c =6500 ksi;

a residual rupture stress, f rr =0.75 ksi; and

a concrete unit weight, w c =0.155 kcf; and

said UHPC mix further comprises a plurality of discontinuous fibers distributed randomly throughout a concrete matrix, said plurality of discontinuous fibers formed of a material selected from the group consisting of: steel; polypropylene; nylon; polyvinyl alcohol; polyolefin; polyethylene; polyester; acrylic; aramid; carbon; silica glass; basalt glass; glass fiber-reinforced polymer; and basalt fiber-reinforced polymer.

2. The beam of claim 1 , wherein said plurality of discontinuous fibers each form a reinforcing strand further comprising:

a diameter of between about 0.5-inch and about 2.0-inches; and

a length of between about ½ inch to about 5 inches.

3. The beam of claim 2 , wherein the reinforcing member further comprises a prestressed beam cast from the UHPC mix as a unitary body.

4. The beam of claim 1 , wherein the UHPC mix further comprises a mixture of:

cement;

silica flume;

limestone;

slag;

masonry sand;

water;

ice;

a shrinkage reducing admixture; and

a workability retaining admixture.

5. The beam of claim 4 , wherein said cement is selected from a group consisting of:

Portland cement; and blended cements including mineral admixtures or blends calcium aluminate cements, calcium sulfoaluminate cements, alkali-activated binders, supersulfated slag cements.

6. The beam of claim 4 , wherein said ultra high performance concrete mixture further comprises:

cement at about 24.5% by weight;

silica flume at about 4.5% by weight;

limestone powder at about 7.6% by weight;

slag at about 13.0% by weight;

masonry sand at about 39% by weight;

water at about 4% by weight;

ice at about 4% by weight;

a shrinkage reducing admixture at less than 2% by weight; and

a workability retaining admixture at less than 0.5% by weight.

7. The beam of claim 5 , wherein said ultra high performance concrete mixture further comprises:

cement at about 24.5% by weight;

silica flume at about 4.5% by weight;

limestone powder at about 7.6% by weight;

slag at about 13.0% by weight;

masonry sand at about 39% by weight;

water at about 4% by weight;

ice at about 4% by weight;

a shrinkage reducing admixture at less than 2% by weight; and

a workability retaining admixture at less than 0.5% by weight.

8. The beam of claim 2 , wherein the UHPC mix further comprises a mixture of:

cement;

silica flume;

limestone;

slag;

masonry sand;

water;

ice;

a shrinkage reducing admixture; and

a workability retaining admixture.

9. The beam of claim 8 , wherein said cement is selected from a group consisting of: Portland cement; and blended cements including mineral admixtures or blends calcium aluminate cements, calcium sulfoaluminate cements, alkali-activated binders, supersulfated slag cements.

10. The beam of claim 8 , wherein said ultra high performance concrete mixture further comprises:

cement at about 24.5% by weight;

silica flume at about 4.5% by weight;

limestone powder at about 7.6% by weight;

slag at about 13.0% by weight;

masonry sand at about 39% by weight;

water at about 4% by weight;

ice at about 4% by weight;

a shrinkage reducing admixture at less than 2% by weight; and

a workability retaining admixture at less than 0.5% by weight.

11. The beam of claim 9 , wherein said ultra high performance concrete mixture further comprises:

cement at about 24.5% by weight;

silica flume at about 4.5% by weight;

limestone powder at about 7.6% by weight;

slag at about 13.0% by weight;

masonry sand at about 39% by weight;

water at about 4% by weight;

ice at about 4% by weight;

a shrinkage reducing admixture at less than 2% by weight; and

a workability retaining admixture at less than 0.5% by weight.

12. The beam of claim 3 , wherein the UHPC mix further comprises a mixture of:

cement;

silica flume;

limestone;

slag;

masonry sand;

water;

ice;

a shrinkage reducing admixture; and

a workability retaining admixture.

13. The beam of claim 12 , wherein said cement is selected from a group consisting of: Portland cement; and blended cements including mineral admixtures or blends calcium aluminate cements, calcium sulfoaluminate cements, alkali-activated binders, supersulfated slag cements.

14. The beam of claim 12 , wherein said ultra high performance concrete mixture further comprises:

cement at about 24.5% by weight;

silica flume at about 4.5% by weight;

limestone powder at about 7.6% by weight;

slag at about 13.0% by weight;

masonry sand at about 39% by weight;

water at about 4% by weight;

ice at about 4% by weight;

a shrinkage reducing admixture at less than 2% by weight; and

a workability retaining admixture at less than 0.5% by weight.

15. The beam of claim 13 , wherein said ultra high performance concrete mixture further comprises:

cement at about 24.5% by weight;

silica flume at about 4.5% by weight;

limestone powder at about 7.6% by weight;

slag at about 13.0% by weight;

masonry sand at about 39% by weight;

water at about 4% by weight;

ice at about 4% by weight;

a shrinkage reducing admixture at less than 2% by weight; and

a workability retaining admixture at less than 0.5% by weight.

16. A long span vehicle bridge structure including a plurality of beams according to claim 4 .

17. A long span vehicle bridge structure including a plurality of beams according to claim 7 .

18. A long span vehicle bridge structure including a plurality of beams according to claim 8 .

19. A long span vehicle bridge structure including a plurality of beams according to claim 11 .

20. A long span vehicle bridge structure including a plurality of beams according to claim 12 .

21. A long span vehicle bridge structure including a plurality of beams according to claim 15 .