Durable concrete and method for producing the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C04B-016/08
C08K-007/22
C04B-020/00
C04B-038/00
C04B-035/16
C04B-014/12
C04B-016/06
C04B-014/04
C04B-014/24
출원번호
US-0078327
(2013-11-12)
등록번호
US-8915997
(2014-12-23)
발명자
/ 주소
Shah, Ashok H.
출원인 / 주소
NAVS, LLC
대리인 / 주소
Roberts Mlotkowski Safran & Cole, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
19
초록▼
A concrete mix for producing freeze-thaw durable concrete having enhanced strength properties, like compressive strength, abrasion resistance, impact strength, toughness, is disclosed. The novel concrete mix contains deformable solid elements in place of 4-8% entrained air for good durability of con
A concrete mix for producing freeze-thaw durable concrete having enhanced strength properties, like compressive strength, abrasion resistance, impact strength, toughness, is disclosed. The novel concrete mix contains deformable solid elements in place of 4-8% entrained air for good durability of concrete under freeze-thaw cycles.
대표청구항▼
1. A concrete mix for producing a freeze-thaw durable concrete, comprising cement, inorganic, hollow, spherical, deformable solid elements, which elements are deformable by crushing at a pressure of <1000 psi, and optionally water, wherein said inorganic deformable solid elements are either included
1. A concrete mix for producing a freeze-thaw durable concrete, comprising cement, inorganic, hollow, spherical, deformable solid elements, which elements are deformable by crushing at a pressure of <1000 psi, and optionally water, wherein said inorganic deformable solid elements are either included in said concrete mix in a dry state, or mixed with said cement at the time of preparing a wet concrete mix, are present at a level of less than or equal to about 2 vol % and 1.56 wt % relative to the volume of said wet concrete mix or a green concrete or a subsequently hardened concrete formed therefrom, or less than 1.7 wt % in the dry state based on the total weight of all dry materials, and have a maximum dimension of less than about 300 micrometers. 2. The concrete mix of claim 1, further comprising sand, aggregates, admixtures, or reinforcing fibers or combinations thereof. 3. The concrete mix of claim 1, wherein a total deformable space of said inorganic deformable solid elements is at least 9% of capillary pores volume, wherein the capillary pores volume is equal to the volume of water in excess of 36% by weight of cement in wet concrete mix. 4. The concrete mix of claim 1, wherein the total volume of said deformable elements is sufficient to accommodate expansion caused by water freezing in capillary pores of said subsequently hardened concrete during a freezing event. 5. The concrete mix of claim 1, wherein water is present at a water-to-cement weight ratio in said wet concrete mix of at least about 26%. 6. The concrete mix of claim 5, wherein the water-to-cement weight ratio in said wet concrete mix is 26 to 40%. 7. The concrete mix of claim 5, wherein water is present at a water-to-cement weight ratio in said wet concrete mix from about 40% to about 60%. 8. The concrete mix of claim 2, wherein said admixtures include one or more of retarders, accelerators, plasticizers, fillers, silica fumes, fly ash, other pozzolanic materials or combinations thereof. 9. The concrete mix of claim 1, wherein said inorganic deformable solid elements have a rigid shell. 10. The concrete mix of claim 9, wherein said inorganic deformable solid elements are made of materials selected from the group of glass, ceramic and silica and combinations thereof. 11. The concrete mix of claim 10, wherein said inorganic deformable solid elements are cenospheres. 12. The concrete mix of claim 1, wherein said inorganic deformable solid elements are glass spheres having rigid shells and a crush strength of <1000 psi. 13. The concrete mix of claim 1, wherein the deformable solid elements have diameters from about 10 micrometers to about 200 micrometers.
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이 특허에 인용된 특허 (19)
Schattka, Jan Hendrik; Kautz, Holger; Loehden, Gerd, Additive building material mixtures containing different-sized microparticles.
Frailey, Max L.; Wheeler, John G., Process for producing a blended cement having enhanced cementitious properties capable of combination with class C fly ash.
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