01514912

Component

The properties of ternary based High Performance Concrete (HPC) mixtures in their fresh state are very important for the contractor side of the cement industry as they could not plan their operations ahead of time. This research identified the fresh properties of ternary mixtures that need to be considered on field projects to use for both the construction industry and as a stepping stone for further research regarding this topic. Total 39 mixture designs were prepared in this study to cover a breadth of material combinations. The results show that the setting time of concrete is modified by pozzolans. It is interesting to note that the portland-pozzolan blended cements that have been optimized for sulfur content were affected in a similar manner like ordinary portland cement. It is recommended that more research needs to be conducted to investigate the possibility of optimization of the sulfur content in the ternary mixtures to obtain the desired setting time characteristics for construction. The bleeding potential was improved with the addition of mineral admixtures to reduce it. Silica fume and metakaolin were very efficient in lowering bleeding potential. On the other hand, a pessimum phenomenon was observed when the amount of Class C fly ash was increased in the mixture. These results can help the construction industry to understand the interaction between the different supplementary cementitious materials (SCMs) in a concrete mixture and indicate that a superposition of characteristics is not adequate for using a ternary mixture of concrete.

This paper was sponsored by TRB committee AFN20 Properties of Concrete. Alternate title: Investigation of Fresh State Properties of Ternary-Based High-Performance Concrete Mixtures.

01503729

14-1343

English

15p

2014

Transportation Research Board 93rd Annual Meeting

Digital/other

Figures; References; Tables

Admixtures; Bleeding (Pavements); High performance concrete; Mix design; Pozzolan; Setting (Concrete); Silica fume

Highways; Materials; I32: Concrete

Transportation Research Board Annual Meeting 2014 Paper #14-1343

TRIS, TRB, ATRI

Jan 27 2014 2:30PM