Improving the Workability of Concrete - Additions of Fly Ash and Use of Small Maximum Grain Size

Title: Improving the Workability of Concrete - Additions of Fly Ash and Use of Small Maximum Grain Size
Author(s): L. Lohaus, T. Gläser
Paper category : conference
Book title: International RILEM Conference on Material Science
Editor(s): W. Brameshuber
Print-ISBN: 978-2-35158-110-0
e-ISBN: 978-2-35158-111-7
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 95 - 104
Total Pages: 10
Nb references: 12
Language: English

Abstract: In order to improve the workability of fresh concrete, three different principles
can be applied.
- Adjusting a softer consistency
- Reduction of the maximum grain size
- Upper rate of fine grain
Improvements on the workability of concrete are of special interest when it comes to building
thin-walled structures or dealing with closely spaced reinforcement. Concrete with small
maximum grain size and a softer or fluid consistency could make a substantial contribution to
an easy and fast application. However, due to the reduction in the maximum grain size, the
water requirement will surely increase. This leads usually to concrete with high cement
content resulting into problems such as heat of hydration, creep and shrinkage. Therefore, by
using fly ash and superplasticizers, it is possible to produce durable concrete with low cement
content, even when small sized aggregates are used.

Online publication: 2010-12-02
Publication type : full_text
Public price (Euros): 0.00