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Influence of superplasticizers on the evolution of ultrasonic P-wave velocity through cement pastes at early age
ID Trtnik, Gregor (Avtor), ID Turk, Goran (Avtor)

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MD5: AD077E520C33D2B41A4B6B9496BB8BE5
PID: 20.500.12556/rul/0e207bcd-9274-41ec-8859-ae6c42584e32

Izvleček
The paper discusses a possibility of using an ultrasonic wave transmission method to study the influence of superplasticizers on the formation of structure of cement pastes at early ages. When compared to mixtures without additives, lower P-wave velocity was found through superplasticized cement pastes, indicating that superplasticizers prevent formation of a solid network frame. Comparing to sulfonate naphthalene-formaldehyde superplasticizers, polycarboxylate ether (PCE) admixtures retarded the solid network frame development more intensively, resulting in a plateau on a P-wave velocity curve during the setting period. The length of the plateau is proportional to the dosage of the PCE and inversely proportional to the specific surface area of the hydration products developed, proving that the specific surface area of a solid phase affects the performance of the PCEs. Validation of ultrasonic results was determined on the basis of the temperature evolution of the material in time.

Jezik:Neznan jezik
Ključne besede:Hydration (A), Microstructure (B), Cement Paste (D), Admixture (D), Ultrasound
Vrsta gradiva:Delo ni kategorizirano
Organizacija:FGG - Fakulteta za gradbeništvo in geodezijo
Založnik:Elsevier
Leto izida:2013
Št. strani:22-31
Številčenje:51
PID:20.500.12556/RUL-68744 Povezava se odpre v novem oknu
ISSN:00088846
Datum objave v RUL:10.07.2015
Število ogledov:2347
Število prenosov:1256
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
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