Hygroscopic cementitious materials

1. A method, comprising:

providing a cementitious material, the cementitious material including an absorbing material, wherein the absorbing material is a super-absorbent material that comprises hollow, tubular-shaped fibers that convey fluid through an inside of the hollow, tubular-shaped fibers by capillary action, such that a plurality of passageways extend through the concrete material;

absorbing a fluid into the absorbing material by the capillary action during hydration of the cementitious material; and

retaining the fluid in the absorbing material after hydration of the cementitious material.

2. The method of claim 1 , further comprising removing substantially all of the fluid from the absorbing material after retaining the fluid in the absorbing material after hydration of the cementitious material.

3. The method of claim 1 , wherein a weight of the cementitious material increases when the fluid is absorbed into the absorbing material.

4. The method of claim 2 , wherein a weight of the cementitious material decreases when the fluid is removed from the absorbing material.

5. The method of claim 2 , further comprising re-absorbing the fluid or another fluid into the absorbing material after removing substantially all of the fluid.

6. The method of claim 2 , wherein removing the fluid from the absorbing material includes evaporation of the fluid from the absorbing material.

7. The method of claim 1 , wherein:

the cementitious material is concrete; and

the fluid is water.

8. The method of claim 1 , wherein the cementitious material is non-mixing concrete.

9. The method of claim 1 , wherein the absorbing material includes a super-absorbent material that includes at least one of a natural fiber, a synthetic fiber, a micro fiber, and a tubular material.

10. A material, comprising:

a concrete material in a hydrated state, the concrete material including a super-absorbent material dispersed throughout the concrete material, and

an aggregate material;

wherein the super-absorbent material comprises hollow, tubular-shaped fibers that convey fluid through an inside of the hollow, tubular-shaped fibers by capillary action, such that a plurality of passageways extend through the concrete material; and

wherein the super-absorbent material is more absorbent than the aggregate material.

11. The material of claim 10 , wherein the hollow, tubular-shaped fibers have a diameter sized to draw in fluid disposed on an outside surface of the concrete material and to retain the fluid until the fluid evaporates.

12. The material of claim 10 , wherein the super-absorbent material includes at least one of a cellulose fiber, cotton, and paper.

13. The material of claim 10 , wherein the concrete material is non-mixing concrete.

14. The material of claim 10 , wherein the concrete material is mixed concrete.

15. The material of claim 10 , wherein the concrete material is unreinforced mass concrete.

16. A method, comprising:

providing a cementitious material, the cementitious material including an absorbing material, wherein the absorbing material is a super-absorbent material that comprises hollow, tubular-shaped fibers that convey fluid through an inside of the hollow, tubular-shaped fibers by capillary action, such that a plurality of passageways extend through the concrete material;

absorbing a fluid into the absorbing material during hydration of the cementitious material;

moving the fluid through the absorbing material by the capillary action during hydration of the cementitious material; and

retaining the fluid in the absorbing material after hydration of the cementitious material.

17. The method of claim 16 , further comprising moving the fluid through the absorbing material after hydration of the cementitious material using external hydrostatic pressure.

18. The method of claim 16 , wherein a weight of the cementitious material increases when the fluid is absorbed into the absorbing material.

19. The method of claim 16 , further comprising:

removing substantially all of the fluid from the absorbing material after retaining the fluid in the absorbing material after hydration of the cementitious material; and

re-absorbing the fluid or another fluid into the absorbing material after removing substantially all of the fluid.

20. The method of claim 19 , wherein a weight of the cementitious material decreases when the fluid is removed from the absorbing material.