A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Field Tests of Water-Reducing, Set-Retarding Admixtures in Mass Concrete at Glen Canyon and Flaming Gorge Dams: -Colorado River Storage Project
Tests were conducted at Glen Canyon and Flaming Gorge Dams to determine any advantages to be gained through the use of lingnin-type, water-reducing, set-retarding agents/WRA/ in mass concrete. At both projects a control mix with normal cementitious-material content was compared to mixes in which the cementitious-materialcx7gxnt was reduced 5 to 10 percent or the cobble content was reduced 10 percent with the use of a WRA. Conclusions were-- (1) The 180-day compressive strength of concretes containing a WRA was 20 to 26 percent greater than the control concretes. In some cases the 1-day strength of the WRA concretes was less than the control concrete. (2) With a 5 percent reduction in cement plus pozzolan content the WRA reduced the water requirement 5.4 percent at Flaming Gorge and 10.9 percent at Glen Canyon. (3) The addition of a WRA produced a 3- to 9hous increase in time to reach initial set in mortar. (4) Use of the WRA did not increase the rate of slump and air loss in the concretes. (Author)
Field Tests of Water-Reducing, Set-Retarding Admixtures in Mass Concrete at Glen Canyon and Flaming Gorge Dams: -Colorado River Storage Project
Tests were conducted at Glen Canyon and Flaming Gorge Dams to determine any advantages to be gained through the use of lingnin-type, water-reducing, set-retarding agents/WRA/ in mass concrete. At both projects a control mix with normal cementitious-material content was compared to mixes in which the cementitious-materialcx7gxnt was reduced 5 to 10 percent or the cobble content was reduced 10 percent with the use of a WRA. Conclusions were-- (1) The 180-day compressive strength of concretes containing a WRA was 20 to 26 percent greater than the control concretes. In some cases the 1-day strength of the WRA concretes was less than the control concrete. (2) With a 5 percent reduction in cement plus pozzolan content the WRA reduced the water requirement 5.4 percent at Flaming Gorge and 10.9 percent at Glen Canyon. (3) The addition of a WRA produced a 3- to 9hous increase in time to reach initial set in mortar. (4) Use of the WRA did not increase the rate of slump and air loss in the concretes. (Author)
Field Tests of Water-Reducing, Set-Retarding Admixtures in Mass Concrete at Glen Canyon and Flaming Gorge Dams: -Colorado River Storage Project
J. D. Richards (author)
1964
2 pages
Report
No indication
English
DAMS , CONCRETE , REINFORCING MATERIALS , ENVIRONMENTAL TESTS , WATER SUPPLIES , COMPRESSIVE PROPERTIES , ELASTICITY , CREEP , MIXTURES , CEMENTS , LIGNIN , COSTS , ADDITIVES , CIVIL ENGINEERING , COLORADO
Engineering Index Backfile | 1958