High Strength Concrete
Posted by Bob from Carol Stream, IL, US on January 4, 2007
What types of aggregate would you use to manufacturer high stength concrete? Is there any relation to the specific gravity of the rock? What additives would you use to strenghten the bond?
Bob:
There is an HPC workshop coming up put on by the NRMCA. email: mbarringer@nrmca.org for details. It's in Dallas--which isn't too close I know, but may be worth checking into. Closer to Carol Stream, IL was the recent HPC Symposium held in Chicago, the full report is available by phoning 847-491-3858, or go to www.acbm.info
Keep in mind that HPC is like high-performance anything--so many ranges and such a broad description. Obviously, as I am always saying: to make high-performance concrete we need higher performing materials as well as high-performance mixing equipment. The stronger the aggregate, the stronger the concrete. The denser the mixture i.e. silica, slag, and cement ratio to fines and water--the higher performance raw materials base. this + the all important admixtures to affect workability and setup times...get you into the range of HPC mixtures.
Have a look at the HPC report, and don't forget to visit concrete.org and click on HPC and UHPC (Ultra...)
Regards,
Robert
