Influence of increasing amount of recycled concrete powder on mechanical properties of cement paste

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F17%3A00313637" target="_blank" >RIV/68407700:21110/17:00313637 - isvavai.cz</a>
Result on the web
<a href="http://iopscience.iop.org/article/10.1088/1757-899X/236/1/012094" target="_blank" >http://iopscience.iop.org/article/10.1088/1757-899X/236/1/012094</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1757-899X/236/1/012094" target="_blank" >10.1088/1757-899X/236/1/012094</a>

Result language
angličtina
Original language name
Influence of increasing amount of recycled concrete powder on mechanical properties of cement paste
Original language description
This paper deals with using fine recycled concrete powder in cement composites as micro-filler and partial cement replacement. Binder properties of recycled concrete powder are given by exposed non-hydrated cement grains, which can hydrate again and in small amount replace cement or improve some mechanical properties. Concrete powder used in the experiments was obtained from old railway sleepers. Infrastructure offer more sources of old concrete and they can be recycled directly on building site and used again. Experimental part of this paper focuses on influence of increasing amount of concrete powder on mechanical properties of cement paste. Bulk density, shrinkage, dynamic Young's modulus, compression and flexural strength are observed during research. This will help to determine limiting amount of concrete powder when decrease of mechanical properties outweighs the benefits of cement replacement. The shrinkage, dynamic Young's modulus and flexural strength of samples with 20 to 30 wt. % of concrete powder are comparable with reference cement paste or even better. Negative effect of concrete powder mainly influenced the compression strength. Only a 10 % cement replacement reduced compression strength by about 25 % and further decrease was almost linear.
Czech name
—
Czech description
—

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Building up Efficient and Sustainable Transport Infrastructure 2017 (BESTInfra2017)
ISBN
—
ISSN
1757-8981
e-ISSN
1757-899X
Number of pages
7
Pages from-to
—
Publisher name
IOP Publishing Ltd
Place of publication
Bristol
Event location
Praha
Event date
Sep 20, 2017
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000417428700094

Similar results(10)