White pozzolan composition and blended cements containing same
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C04B-014/42
C04B-014/22
출원번호
US-0087064
(2002-03-01)
발명자
/ 주소
Hemmings, Raymond T.
Nelson, Robert D.
Graves, Philip L.
Cornelius, Bruce J.
출원인 / 주소
Albacem, LLC
대리인 / 주소
Klauber & Jackson
인용정보
피인용 횟수 :
11인용 특허 :
9
초록▼
A white pozzolan derived from by-products of manufacturing vitreous low alkali, low iron glass fibers, and to the method for producing the white pozzolan. The invention relates as well to cement compositions based on the white pozzolan, such as white and pigmented blended pozzolanic cements of high
A white pozzolan derived from by-products of manufacturing vitreous low alkali, low iron glass fibers, and to the method for producing the white pozzolan. The invention relates as well to cement compositions based on the white pozzolan, such as white and pigmented blended pozzolanic cements of high durability for use in applications such as white or colored architectural concrete, building materials, and manufactured cementitious products. The white pozzolan also functions as a high performance pozzolan with grey cement.
대표청구항▼
1. A blended pozzolanic cement produced by blending with portland cement, from 5 to 40% by weight of the total composition of a fine white pozzolan comprising a finely ground vitreous calcium aumino-silicate (CaO—Al 2 O 3 —SiO 2 ) powder derived from previously discarded glass fiber
1. A blended pozzolanic cement produced by blending with portland cement, from 5 to 40% by weight of the total composition of a fine white pozzolan comprising a finely ground vitreous calcium aumino-silicate (CaO—Al 2 O 3 —SiO 2 ) powder derived from previously discarded glass fibers having low alkali and low iron content and low levels of discolorants;said powder having an alkali content by weight of not more than 2% as (Na 2 O+K 2 O), an iron content by weight of not more than 0.8% as Fe 2 O 3 , and being substantially white in color with a reflectance value of at least 80 as measured by a Technibrite TB-1C colorimeter according to the ISO 2467, 2471 method;at least 95% by weight of the powder comprising particles of less than 45 microns E.S.D. and said particles having a blocky, relatively equi-dimensional particle shape wherein the average aspect ratio of the particles is less than 2:1, and with substantially no residual high aspect ratio fibers. 2. A blended cement in accordance with claim 1, which is substantially white. 3. A blended pozzolanic cement in accordance with claim 1, further comprising one or more functional cement additives selected from the group consisting of accelerators, retarders, water-reducers/plasticizers, corrosion inhibitors, and pigments. 4. A colored pozzolanic cement comprising the white cement of claim 2 together with an admixed coloring pigment. 5. A white pozzolan for blending with portland cement for use in white and colored concrete applications, comprising a finely ground vitreous calcium aumino-silicate (CaO—Al 2 O 3 —SiO 2 ) powder derived from previously discarded glass fibers having low alkali and low iron content, and low levels of discolorants;said powder having an alkali content by weight of not more than 2% as (Na 2 O+K 2 O), an iron content by weight of not more than 0.8% as Fe 2 O 3 , and being substantially white in color with a reflectance value of at least 80 as measured by a Technibrite TB-1C colorimeter according to the ISO 2467, 2471 method;at least 95% by weight of the powder comprising particles of less than 45 microns E.S.D. and said particles having a blocky, relatively equi-dimensional particle shape wherein the average aspect ratio of the particles is less than 2:1, and with substantially no residual high aspect ratio fibers. 6. A composition in accordance with claim 5, wherein the said pozzolan has a P.S.D. such that at least 95% by weight of the particles are of less than 25 microns E.S.D. 7. A composition in accordance with claim 5, wherein the said pozzolan has a P.S.D. such that at least 95% by weight of the particles are of less than 10 microns E.S.D. 8. A composition in accordance with claim 5, wherein the said pozzolan has a P.S.D. such that at least 95% by weight of the particles are of less than 5 microns E.S.D. 9. A composition in accordance with claim 5, wherein the said pozzolan has a P.S.D. such that at least 95% by weight of the particles are of less than 3 microns E.S.D. 10. A white pozzolanic cement produced by intergrinding of a vitreous low alkali, low iron pozzolan in accordance with claim 5 with white portland cement clinker and white gypsum. 11. A white pozzolanic cement in accordance with claim 10, wherein said white clinker is selected from one or more members of the group consisting of Type I, Type II, Type III, Type IV, and Type V ASTM C-150 cements. 12. A raw feed for white cement clinker production comprising a finely ground vitreous low alkali, and low iron content pozzolan in accordance with claim 5 derived from fine grinding of glass fibers.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (9)
James E. Pelot ; H. Wayne Hutchens ; Stephen Z. Baxter, Concrete composition.
Potter William D. (Bishops Stortford GB2) Barclay Andrew C. (Harlow GB2) Dunning Reginald (Parbold near Wigan GB2) Parry Richard J. (Southport GB2), Fluorine-free calcium-aluminosilicate glasses.
Azuma Masamichi ; Paz De Araujo Carlos A. ; McMillan Larry D., Integrated circuits having mixed layered superlattice materials and precursor solutions for use in a process of making t.
Folks Timothy S. ; Hill Patrick M. ; Sheets ; III Frank T. ; Ball Richard F. ; Sisneros Joseph R. ; Uribe Jesus ; Forrester Curtis W., Interground white blended cement.
Meng, Jian; Fagg, Mike; Rich, John; Nameni, Gordon N.; Leehr, William; Westbrook, Paul A., Fiberglass materials, methods of making, and applications thereof.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.