Interfacial shear strength enhancement of polymeric macro-fibers via plasma treatment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F17%3A00322313" target="_blank" >RIV/68407700:21110/17:00322313 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21720/17:00322313

Výsledek na webu

<a href="https://www.vbripress.com/amp/app/webroot/uploads/oldfullabstract/5a2b04aae3dd11512768682_fullabstratct.pdf" target="_blank" >https://www.vbripress.com/amp/app/webroot/uploads/oldfullabstract/5a2b04aae3dd11512768682_fullabstratct.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5185/amp.2017/912" target="_blank" >10.5185/amp.2017/912</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Interfacial shear strength enhancement of polymeric macro-fibers via plasma treatment

Popis výsledku v původním jazyce

This work deals with a utilization of a plasma treatment of polymeric macro-fibers used as reinforcement in the cement composites. Commercial fibers BeneSteel were plasma treated to reduce their weaknesses – smooth and chemically inert surfaces and thus to enhance an interfacial shear strength between them and the cement matrix. The low-pressure cold oxygen plasma treatment was done for both physical (roughening) and chemical (surface activation via active polar groups) surface modifications. A plasma exposition time differed between 5 and 480 seconds, while the surface changes were observed. It was shown that the most effective treatment time was equal to 30 seconds, as proven by a wettability measurement between fibers and demineralised water. To determine the interfacial shear strength between reference and chosen modified fibers, pull out tests from the cement matrix was performed. Finally, thus treated fibers were used as the reinforcement in concrete composites. Concrete samples having dimension equal to 100 x 100 x 400 mm were tested in the three-point bending test. We focused especially on the post-cracking response of tested samples. The results showed that the post-cracking residual flexural strength of samples reinforced with plasma treated fibers was higher by 30 %. It was find out that the utilization of plasma treated fibers is more effective if compared to reference ones.

Název v anglickém jazyce

Interfacial shear strength enhancement of polymeric macro-fibers via plasma treatment

Popis výsledku anglicky

This work deals with a utilization of a plasma treatment of polymeric macro-fibers used as reinforcement in the cement composites. Commercial fibers BeneSteel were plasma treated to reduce their weaknesses – smooth and chemically inert surfaces and thus to enhance an interfacial shear strength between them and the cement matrix. The low-pressure cold oxygen plasma treatment was done for both physical (roughening) and chemical (surface activation via active polar groups) surface modifications. A plasma exposition time differed between 5 and 480 seconds, while the surface changes were observed. It was shown that the most effective treatment time was equal to 30 seconds, as proven by a wettability measurement between fibers and demineralised water. To determine the interfacial shear strength between reference and chosen modified fibers, pull out tests from the cement matrix was performed. Finally, thus treated fibers were used as the reinforcement in concrete composites. Concrete samples having dimension equal to 100 x 100 x 400 mm were tested in the three-point bending test. We focused especially on the post-cracking response of tested samples. The results showed that the post-cracking residual flexural strength of samples reinforced with plasma treated fibers was higher by 30 %. It was find out that the utilization of plasma treated fibers is more effective if compared to reference ones.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA15-12420S" target="_blank" >GA15-12420S: Modifikace povrchů polymerní a skleněné mikro-výztuže pro aplikace ve stavebnictví</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Advanced Materials Proceedings

ISSN

2002-4428

e-ISSN

2002-4428

Svazek periodika

2

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

SE - Švédské království

Počet stran výsledku

4

Strana od-do

789-792

Kód UT WoS článku

—

EID výsledku v databázi Scopus

—