cpi
Current Issue Flipbook

Trade Journals for the Concrete Industry

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

LATEST ARTICLES


Improving the Mix Design

Compaction Test Method for Dry Concrete


Dry concrete, also known as no-slump concrete and earth-moist concrete, is used to manufacture paving units and demands vibrocompressers to be molded. The features on its fresh state have influence on the production process, whereas the mix that are easily compacted demands less strength of the equipment and also will result on paving units that are more dense, with higher mechanical resistance and lower water absorption. However, there aren’t any test methods for the fresh state, and normally it is used empirical methods. Hence, on this paper it was develop a testing method to analyze the features of the no-slump concrete on its fresh state. The method also provides a specimen that allows to test the hardened state features. With this method is possible to obtain data on strength x time x displacement, as well as swelling, allowing to analyze which mix design is easily compacted and has less elastic recovery. To verify the method it was conducted tests using the mix design of a reference manufactured and afterwards these tests were compared with the paving units produced on the manufactured. The specimen produced on the laboratory reached 90% of mechanical resistance of the manufactured paving units, and lower values of water absorption. Thereby, it is possible to affirm that the testing method can be related to the production process and thus be used to verify modifications on the mix design of the concrete.

Show article
Download article
 


Contact

Associação Brasileira de Cimento Portland
Av. Torres de Oliveira, 76
Jaguaré CEP 05347-902 – São Paulo, Brazil
www.abcp.org.br

CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 12 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

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