Influence of various amount of diatomaceous earth used as cement substitute on mechanical properties of cement paste

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F16%3APU120433" target="_blank" >RIV/00216305:26110/16:PU120433 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1063/1.4952067" target="_blank" >http://dx.doi.org/10.1063/1.4952067</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/1.4952067" target="_blank" >10.1063/1.4952067</a>

Result language
angličtina
Original language name
Influence of various amount of diatomaceous earth used as cement substitute on mechanical properties of cement paste
Original language description
Active silica containing materials in the sub-micrometer size range are commonly used for modification of strength parameters and durability of cement based composites. In addition, these materials also assist to accelerate cement hydration. In this paper, two types of diatomaceous earths are used as partial cement replacement in composition of cement paste mixtures. For raw binders, basic physical and chemical properties are studied. The chemical composition of tested materials is determined using classical chemical analysis combined with XRD method that allowed assessment of SiO2 amorphous phase content. For all tested mixtures, initial and final setting times are measured. Basic physical and mechanical properties are measured on hardened paste samples cured 28 days in water. Here, bulk density, matrix density, total open porosity, compressive and flexural strength, are measured. Relationship between compressive strength and total open porosity is studied using several empirical models. The obtained results give evidence of high pozzolanic activity of tested diatomite earths. Their application leads to the increase of both initial and final setting times, decrease of compressive strength, and increase of flexural strength.
Czech name
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Czech description
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Project
<a href="/en/project/GA14-04522S" target="_blank" >GA14-04522S: Investigation of processes at the formation of solid structure in the silicon oxide-Portland cement system in a relation to the properties of binder</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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