cpi
Current Issue Flipbook

Trade Journals for the Concrete Industry

Current Issue Archive Online Flipbooks CPI Middle East CPI TV Events Buyers' Guide Newsletter Advertising Subscription
Suchen

The use of byproduct materials as a cementreplacement in the USA


Sustainability of prestressed concrete

 


Concrete is one of most common materials used in the construction industry. However, there is growing concern over the environmental effects of manufacturing Portland cement. Fly ash and slag have become two viable replacement options, as they benefit the concrete and decrease environmental effects. A survey was sent to prestressed manufacturers asking about their current usage of fly ash and slag as Portland cement replacements. Analysis of the type of coal burned and subsequent class of fly ash produced in relation to location of companies using specific classes showed no correlation, indicating the relative ease to acquire either class anywhere in the United States. As expected, the number of respondents claiming use of slag was lower. Every company using slag also used fly ash. Replacement percentages were reported as high as 50%, while typical release strengths were similar to fly ash at 4,000 psi (27.6 MPa), though 25% reported strengths exceeding 6,000 psi (41.4 MPa). Analysis of steel mill locations to location of users showed that the use of slag occurred only in proximity to a mill. Those not using slag reported cost and low availability as primary deterrents.

Show article
Download article
 


Contact


CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 10 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

About us
Contact
ad-media GmbH

Industriestrasse 180
50999 Cologne
Germany

T: + 49 2236 96 23 90
F: + 49 2236 96 23 96
info@ad-media.de

Links
  • Magazine
  • CPi-tv
  • Events
  • Buyers' Guide
  • Newsletter
  • Advertising
  • Patents
  • ad-media GmbH
Social
  • Linkedin
RIGHTS
  • Imprint
  • Data Protection
 
We are using Cookies on www.cpi-worldwide.com. Some of them are essential, while others help us improve this website and your experience. More information can be found in our privacy policy. Accept all Extended Configuration
Essential
Cookies of this category are required for the basic functions of the website. They are used for safe and proper use and therefore cannot be deactivated.
Functional
Cookies of this category allow us to analyze (Google Analytics) the use of the website and measure performance. They also help us to provide useful functions.
Third-party
Cookies of this category allow us to show third-party content (social networks, videos)
Save settings and close Accept all