Effect of styrene-acrylate admixtures on the resistance of concrete to low pH

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21610%2F19%3A00335165" target="_blank" >RIV/68407700:21610/19:00335165 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.31808/5ca6e03c5ca4f0d406ac8898" target="_blank" >http://dx.doi.org/10.31808/5ca6e03c5ca4f0d406ac8898</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.31808/5ca6e03c5ca4f0d406ac8898" target="_blank" >10.31808/5ca6e03c5ca4f0d406ac8898</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of styrene-acrylate admixtures on the resistance of concrete to low pH

Popis výsledku v původním jazyce

The paper describes behavior of ternary gypsum-based composites, especially the changes of properties caused by the influence of moisture. The ternary gypsum-based mortar, composed of gypsum, hydrated lime, different types of pozzolan (silica fume, granul. blast slag, brick powder) and standard sand was investigated. Pozzolans in the mixture react with hydraulic lime and forms CSH phases in the material. Presence of these phases improves resistance of gypsum against the moisture. The way of samples storage affects the development of materials structure and properties of gypsum-based mortars. Therefore the samples were stored in two different environments, in the laboratory and under the water for period of 360 days. The basic physical and mechanical properties of samples stored in the laboratory environment and under the water are compared. The comparison of the TG curves, based on the samples of different age was carried out. The storage in the water has the greatest impact on the properties of all materials, especially on the mechanical properties. While the strength of pure gypsum mortar, stored in the water, decreased significantly and after one year in the water environment the samples were nearly destroyed, the samples with pozzolan admixtures evinced the improvement of mechanical properties, when stored in water.

Název v anglickém jazyce

Effect of styrene-acrylate admixtures on the resistance of concrete to low pH

Popis výsledku anglicky

The paper describes behavior of ternary gypsum-based composites, especially the changes of properties caused by the influence of moisture. The ternary gypsum-based mortar, composed of gypsum, hydrated lime, different types of pozzolan (silica fume, granul. blast slag, brick powder) and standard sand was investigated. Pozzolans in the mixture react with hydraulic lime and forms CSH phases in the material. Presence of these phases improves resistance of gypsum against the moisture. The way of samples storage affects the development of materials structure and properties of gypsum-based mortars. Therefore the samples were stored in two different environments, in the laboratory and under the water for period of 360 days. The basic physical and mechanical properties of samples stored in the laboratory environment and under the water are compared. The comparison of the TG curves, based on the samples of different age was carried out. The storage in the water has the greatest impact on the properties of all materials, especially on the mechanical properties. While the strength of pure gypsum mortar, stored in the water, decreased significantly and after one year in the water environment the samples were nearly destroyed, the samples with pozzolan admixtures evinced the improvement of mechanical properties, when stored in water.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/TH02020690" target="_blank" >TH02020690: Betony s mimořádnou odolností vůči působení agresivních médií</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

9th International Conference On Concrete Under Severe Conditions - Environment and Loading - proceedings

ISBN

978-65-80633-00-5

ISSN

—

e-ISSN

—

Počet stran výsledku

7

Strana od-do

—

Název nakladatele

Unisinos - Avenida Doutor Nilo Peçanha - Boa Vista

Místo vydání

Porto Alegre

Místo konání akce

Porto Alegre

Datum konání akce

5. 6. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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