Properties of fresh and hardened concrete

SCC with crushed aggregate

In self-compacting concretes (SCC), round particles are frequently used as coarse aggregate. These are expected to be of advantage, in particular as regards an improved work-ability. The tests presented in this article demonstrate that the manufacture of SCC with a high content of crushed aggregate and good workability is possible. In addition it was shown that the use of crushed aggregate, instead of gravel, can improve the strength and deformation properties of the concrete.

The fresh concrete properties of self-compacting concretes (SCC) are considerably influenced by the choice of coarse aggregate. The principal parameters are in this context the quantitative content of the concrete as well as the particle geometry and roughness. But hardened concrete properties result from this as well and/or are determined via these parameters. Knowledge of these interrelated aspects thus offers the possibility to directly influence the properties of fresh and hardened concrete through the choice of coarse aggregate.  

The following article presents, firstly, possibilities for...

Related articles:

Issue 2018-02 On the definition of their correct roughness

Interior side of element walls

An element wall should give a monolithic impression when in use. There is to be a firm bond between the shells and the filling concrete. The bond achieved has an influence mainly on: the load-bearing...

more
Issue 2020-02 Planning pouring and compaction

Pouring determines the properties of structural elements

Concrete is a multipurpose construction material which can be tailored to have numerous different properties. In most cases, it is optimized with respect to the hardened concrete properties, that is,...

more
Issue 2017-04

Brazilian waste – an alternative in the ­production of self-compacting concrete (SCC)

1. Introduction Over the last few years, Brazil has been standing out globally in the production and export of marble and granite for ornamental use. In 2015, the country ranked among the top three in...

more
Issue 2009-08 Powder-type SCC with crushed mineral aggregates

Design concept and flow properties of SCC – Part 1

The first part of this two-part article presents an approach to determining the volume of the cement paste required to produce SCC and discusses this approach with respect to the granulometric...

more
Issue 2010-03 High-strength self-compacting concrete

Development and checking of the characteristic parameters

As high-strength concrete in general may only be manufactured in monitoring class 3, no additional supervision would be required for the use of a high-strength self-compacting concrete (HSCC), instead...

more