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Medientyp:
E-Artikel
Titel:
Flexural and Compressive Strength of the Cement Paste with Recycled Concrete Powder
Beteiligte:
Topič, Jaroslav;
Fladr, Josef;
Prošek, Zdeněk
Erschienen:
Trans Tech Publications, Ltd., 2017
Erschienen in:Advanced Materials Research
Sprache:
Nicht zu entscheiden
DOI:
10.4028/www.scientific.net/amr.1144.65
ISSN:
1662-8985
Entstehung:
Anmerkungen:
Beschreibung:
<jats:p>In previous work focused on using recycled concrete powder as cement replacement the basic dependency of the mechanical properties on the amount of recycled concrete powder was defined. Influence of the amount of recycled concrete powder on the flexural and compressive strength was shown on 0, 33, 67 and 100 wt. % cement replacement. Based on the previous data the strength properties of the cement paste with recycled concrete powder below 33 wt. % was almost constant and strength properties were comparable with reference sample made of cement only. After the recycled concrete powder in cement paste exceeded amount of 33 wt. % the flexural and compressive strength decrease rapidly. In case of 67 wt. % amount of recycled concrete powder the compressive strength decrease about 65 %. The aim of this article is define critical amount of recycled concrete powder in cement paste when strength properties start decrease rapidly and cement replacement is no longer beneficial. This critical amount will be located somewhere between 30 and 50 wt. % of recycled concrete powder. Replacement below critical amount could lead to cost reduction of cement composites and also the negative impact of the cement production and concrete disposal on environmental could be reduced.</jats:p>