Hydration heat evolution of the cement paste with recycled concrete: Influence of grain size distribution of recycled concrete powder

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F17%3A00312928" target="_blank" >RIV/68407700:21110/17:00312928 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Hydration heat evolution of the cement paste with recycled concrete: Influence of grain size distribution of recycled concrete powder

Popis výsledku v původním jazyce

The paper deals with the influence of level of grinding of the recycled concrete. Level of grinding mostly influenced on the hydration heat evolution of a cement paste. Measurement of hydration heat evolution is one of the ways to detect reactive properties of recycled concrete powder modified by high speed mill device. Basic characteristics that most influence the hydraulic properties of recycled concrete powder are grin size diagram and chemical composition of the original concrete. Non-hydrated inner part of cement grains could further react if it is exposed to water. In this experiment the recycled concrete from recycled railroad sleepers and structural layers of the D2 highway was used. Recycled concrete powder from highway was divided into 4 more variants which differ by grinding process during production. To detect difference in hydration process four mixtures of cement paste with different types of recycled concrete powder were made and further subjected to calorimetric measurement. The results were after compared with the hydration heat rate of reference cement paste. According to results the type of milling process had minor influence on hydraulic properties of recycled concrete powder compared with influence of origin of recycled concrete.

Název v anglickém jazyce

Hydration heat evolution of the cement paste with recycled concrete: Influence of grain size distribution of recycled concrete powder

Popis výsledku anglicky

The paper deals with the influence of level of grinding of the recycled concrete. Level of grinding mostly influenced on the hydration heat evolution of a cement paste. Measurement of hydration heat evolution is one of the ways to detect reactive properties of recycled concrete powder modified by high speed mill device. Basic characteristics that most influence the hydraulic properties of recycled concrete powder are grin size diagram and chemical composition of the original concrete. Non-hydrated inner part of cement grains could further react if it is exposed to water. In this experiment the recycled concrete from recycled railroad sleepers and structural layers of the D2 highway was used. Recycled concrete powder from highway was divided into 4 more variants which differ by grinding process during production. To detect difference in hydration process four mixtures of cement paste with different types of recycled concrete powder were made and further subjected to calorimetric measurement. The results were after compared with the hydration heat rate of reference cement paste. According to results the type of milling process had minor influence on hydraulic properties of recycled concrete powder compared with influence of origin of recycled concrete.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/TA04031256" target="_blank" >TA04031256: Rozvoj mechanicky aktivovaných materiálů na bázi recyklovaného betonu pro progresivní stabilizované a za studena recyklované konstrukční vrstvy</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Contemporary Materials and Technologies in Civil Engineering

ISBN

978-3-0357-1138-7

ISSN

1013-9826

e-ISSN

1662-9795

Počet stran výsledku

6

Strana od-do

37-42

Název nakladatele

Trans Tech Publications

Místo vydání

Curich

Místo konání akce

Praha

Datum konání akce

15. 6. 2016

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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