Crack-reducing admixture for cementitious compositions
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C04B-024/02
C04B-024/04
C04B-024/08
C04B-024/16
C04B-024/20
C04B-024/34
C04B-028/02
C04B-028/04
C04B-040/00
C04B-103/00
C04B-111/34
출원번호
US-0549942
(2014-11-21)
등록번호
US-9718732
(2017-08-01)
발명자
/ 주소
Schaef, Steve
Attiogbe, Emmanuel
Kerobo, Charles
Muessig, Stefan
Vojtko, Daniel
출원인 / 주소
Construction Research & Technology GmbH
대리인 / 주소
Curatolo Sidoti Co., LPA
인용정보
피인용 횟수 :
0인용 특허 :
18
초록▼
A cementitious composition including at least one cementitious material and at least one crack reducing admixture including: (i) from 0 to about 5 weight percent of at least one alcohol, based on the total weight of the admixture excluding water; and (ii) a compound having the chemical structure of
A cementitious composition including at least one cementitious material and at least one crack reducing admixture including: (i) from 0 to about 5 weight percent of at least one alcohol, based on the total weight of the admixture excluding water; and (ii) a compound having the chemical structure of formula (III): wherein: v is an integer from 0 to 50 and w is an integer from 0 to 50, with the proviso that the sum of v and w is at least 1 but not greater than 50. Also, methods of making the cementitious composition, reducing or eliminating the formation of cracks in a cementitious composition as the cementitious composition cures, and limiting the size of cracks which form in a cementitious composition as the cementitious composition cures using an admixture for cementitious compositions as described herein.
대표청구항▼
1. A cementitious composition comprising at least one cementitious material and at least one crack reducing admixture comprising: (i) from 0 to about 5 weight percent of at least one alcohol, based on the total weight of the admixture excluding water; and (ii) a compound having the chemical structur
1. A cementitious composition comprising at least one cementitious material and at least one crack reducing admixture comprising: (i) from 0 to about 5 weight percent of at least one alcohol, based on the total weight of the admixture excluding water; and (ii) a compound having the chemical structure of formula (III): wherein:v is an integer from 0 to 50; andw is an integer from 0 to 50;with the proviso that the sum of v and w is at least 1 but not greater than 50; andwherein, during curing, the cementitious composition exhibits no cracks wider than about 175 μm. 2. The cementitious composition of claim 1, wherein v is 2 and w is 2. 3. The cementitious composition of claim 1, further comprising at least one air entraining admixture. 4. The cementitious composition of claim 3, wherein the air entraining admixture comprises at least one synthetic air entrainer and/or at least one natural air entrainer. 5. The cementitious composition of claim 4, wherein the air entraining admixture comprises at least one of fatty acid air entrainers, alkylbenzene sulfonate-based air entrainers, α-olefin sulfonate-based air entrainers, ethoxylated alcohol based air entrainers, tall oil, vinsol resin, or rosin. 6. The cementitious composition of claim 1, further comprising aggregate and water. 7. The cementitious composition of claim 1, wherein the crack reducing admixture is present in the cementitious composition in an amount of about 0.25 to about 4 gallons per cubic yard of the cementitious composition. 8. The cementitious composition of claim 1, wherein, during curing, the cementitious composition exhibits no cracks wider than about 100 μm. 9. The cementitious composition of claim 1, wherein the crack reducing admixture further comprises at least one acid in an amount effective to at least partially neutralize the admixture to reduce or eliminate the formation of precipitates in the admixture, optionally wherein the at least one acid comprises acetic acid. 10. A method of reducing or eliminating the formation of cracks in a cementitious composition as the cementitious composition cures, comprising adding to the uncured cementitious composition at least one crack reducing admixture comprising: (i) from 0 to about 5 weight percent of at least one alcohol, based on the total weight of the admixture excluding water; and (ii) a compound having the chemical structure of formula (III): wherein:v is an integer from 0 to 50; andw is an integer from 0 to 50;with the proviso that the sum of v and w is at least 1 but not greater than 50; andwherein, during curing, the cementitious composition exhibits no cracks wider than about 175 μm. 11. The method of claim 10, wherein v is 2 and w is 2. 12. The method claim 10, further comprising adding at least one air entraining admixture to the cementitious composition. 13. The method of claim 12, wherein the air entraining admixture comprises at least one synthetic air entrainer and/or at least one natural air entrainer. 14. The method of claim 13, wherein the air entraining admixture comprises at least one of fatty acid air entrainers, alkylbenzene sulfonate-based air entrainers, α-olefin sulfonate-based air entrainers, ethoxylated alcohol based air entrainers, tall oil, vinsol resin, or rosin. 15. The method of claim 10, further comprising adding aggregate and water to the cementitious composition. 16. The method of claim 10, wherein the crack reducing admixture is added to the cementitious composition in an amount of about 0.25 to about 4 gallons per cubic yard of the cementitious composition. 17. The method of claim 10, wherein the crack reducing admixture further comprises at least one acid in an amount effective to at least partially neutralize the admixture to reduce or eliminate the formation of precipitates in the admixture, optionally wherein the at least one acid comprises acetic acid. 18. A method of limiting the size of cracks which form in a cementitious composition as the cementitious composition cures to a width of less than or equal to about 175 μm, comprising adding to the uncured cementitious composition at least one crack reducing admixture comprising: (i) from 0 to about 5 weight percent of at least one alcohol, based on the total weight of the admixture excluding water; and (ii) a compound having the chemical structure of formula (III): wherein: v is an integer from 0 to 50; andw is an integer from 0 to 50;with the proviso that the sum of v and w is at least 1 but not greater than 50. 19. The method of claim 18, wherein v is 2 and w is 2. 20. The method of claim 18, wherein the crack reducing admixture is added to the cementitious composition in an amount of about 0.25 to about 4 gallons per cubic yard of the cementitious composition. 21. The cementitious composition of claim 1, wherein v is an integer from 1 to 25 and w is an integer from 1 to 25. 22. The cementitious composition of claim 1, wherein v is an integer from 2 to 10 and w is an integer from 2 to 10.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (18)
Budiansky Noah D. ; Williams Brent S. ; Chun Byong-Wa, Air entrainment with polyoxyalkylene copolymers for concrete treated with oxyalkylene SRA.
Berke, Neal S.; Merritt, Jordan S.; Li, Lianfang; Aldykiewicz, Jr., Antonio J.; Wiercinski, Robert A.; Morgan, Michael D., Articles made from cementitious foam and slurry.
Durning, Timothy A.; Roberts, Lawrence R.; Berke, Neal S., Avoiding cracking and curling in concrete flooring upon which water-based adhesives are employed.
Durning,Timothy A.; Roberts,Lawrence R.; Berke,Neal S., Avoiding cracking and curling in concrete flooring upon which water-based adhesives are employed.
Berke Neal S. (Chelmsford MA) Dallaire Michael P. (Dover NH) Abelleira Angel (Nashua NH), Cement admixture capable of inhibiting drying shrinkage and method of using same.
Jordan, IV, Glenn Thomas; Scheper, William Michael; Sivik, Mark Robert; Kluesener, Bernard William; McKenzie, Kristen Lynne, Compositions including ether-capped poly (oxyalkylated) alcohol wetting agents.
Berke Neal S. (Chelmsford MA) Dallaire Michael P. (Dover NH) Gartner Ellis M. (Silver Spring MD) Kerkar Awdhoot V. (Columbia MD) Martin Timothy J. (West Sussex GB2), Drying shrinkage cement admixture.
Kluesener, Bernard William; Sivik, Mark Robert; Jordan, IV, Glenn Thomas; Huber, Jr., Paul William; Neyraval, Philippe; Priou, Christian, Process for preparing ether-capped poly(oxyalkylated) alcohol surfactants.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.