�ri pomza agregal� kire� ve metakaolin esasl� matriste kenevir liflerin makro sentetik liflerle kar��la�t�r�lmas�

Cilt : 17 Say�: 4 Y�l : 2022

Son Say� Yay�mlanm�� Makaleler Pop�ler Makaleler Bask�daki Makaleler

Index and Coverage

Avery Index

DOAJ

EBSCO

Erih Plus

ESCI � Clarivate

GALE Cengage

Genamics

ProQuest

TR Dizin

TUBITAK Ulakbim

Ulrichs Web

�ri pomza agregal� kire� ve metakaolin esasl� matriste kenevir liflerin makro sentetik liflerle kar��la�t�r�lmas� [Megaron]

Megaron. Bask�daki Makaleler: MEGARON-00868 | DOI: 10.14744/megaron.2023.00868

�ri pomza agregal� kire� ve metakaolin esasl� matriste kenevir liflerin makro sentetik liflerle kar��la�t�r�lmas�

Havva Merve Tuncer, Zehra Canan Girgin
Y�ld�z Teknik �niversitesi, Mimarl�k Fak�ltesi, Mimarl�k B�l�m�, �stanbul

G�n�m�zde �zellikle �evre ve s�rd�r�lebilirlik alan�nda kompozit yap� malzemelerinin tasar�m�nda �nemli geli�meler g�zlenmektedir. Ara�t�rmac�lar, eski �a�lardan beri bilinen geleneksel ba�lay�c� kireci yeniden, bu defa ta��y�c�l�k amac� ile ke�fetmektedir. S�rd�r�lebilir �zelli�i ile bilinen kirecin; dayan�m, yava� hidratasyon h�z� ve dayan�kl�l��a olumsuz etkileri nedeniyle genellikle metakaolin, u�ucu k�l, ��t�lm�� y�ksek f�r�n c�rufu ve silis duman� gibi puzzolanik bile�enler ile kullan�lmaktad�r. Di�er taraftan; y�ksek �ekme mukavemeti, ortalama d�zeyde elastisite mod�l� ve d��k yo�unlu�u ile sel�lozik liflerin, lif takviyeli kompozitler konusunda maliyet a��s�ndan rekabet edebilirli�i ve ekolojik a��dan verimlili�i s�z konusudur. Sel�lozik liflerin alkali ortamda bozulmas� engellenirse, yap�sal ama�l� kullan�m� da m�mk�n olabilir. Bu �al��mada, kenevir lif ve iki tip makro sentetik lifin kire�+metakaolin esasl� matris i�indeki etkinli�i deneysel olarak ara�t�r�lm��t�r. Lif takviyeli matrislerin bas�n�, e�ilme dayan�m� ve dayan�kl�l�� konular�na odaklan�lm��t�r. Literat�rde ilk defa, makro sentetik liflerin kire� esasl� kar��mdaki etkinli�i incelenmi�tir. Ayr�ca, yeni bir katk� olarak; iri hafif agregalar, s�z konusu lifler ile takviyeli kire�+metakaolin bazl� matrise eklenmi�tir. Deneysel sonu�lar, kenevir liflerde yap�sal bozulman�n ba�ar�yla azalt�labilece�ini ve matrise �� tip lif takviyesi ile liflerin kendi s�n�flar�nda uygun mekanik karakteristiklerin sa�lanabilece�ini g�sterilmi�tir.

Anahtar Kelimeler: Kenevir, kire�, makro sentetik lif, metakaolin, pomza.

Comparison of hemp fibers with macro synthetic fibers in lime-metakaolin matrix incorporating pumice as coarse aggregates

Havva Merve Tuncer, Zehra Canan Girgin
Department of Architecture, Y�ld�z Technical University Faculty of Architecture, �stanbul, T�rkiye

Significant developments are observed in the design of composite building materials nowadays, especially on environmental and sustainability issues. For structural usage, nowadays researchers reveal lime, which is the traditional binding material known since ancient times. Lime known for its sustainable feature is often used with supplementary cementitious materials (SCM) such as metakaolin, fly ash, ground granulated blast furnace slag, and silica fume due to unfavorable properties regarding durability, strength, and slow hydration rate. On the other hand, cellulosic fibers with the advantages such as low density, high tensile strength, and moderate elastic modulus have cost competitiveness and eco-efficiency for fiber reinforced composites. The structural use of cellulosic fibers may be possible if the degradation of hemp fibers in an alkali environment is mitigated. In this study, the experimental studies on hemp fibers were carried out by comparing with two types of macro synthetic fibers in lime+metakaolin (L+MK) based matrix. Durability as well as compressive and flexural characteristics were addressed in those fibrous matrices. First time in the current literature, macro synthetic fibers were included in the lime-based mixture. Besides, as a new contribution, coarse lightweight aggregates (LWA) were incorporated to this type of matrix with those fibers. The experimental findings indicate out that the degradation of hemp fibers can be mitigated successfully, and three types of fibrous mixtures provide proper mechanical characteristics in their categories.

Keywords: Hemp, lime, macro synthetic fiber, metakaolin, pumice.

Sorumlu Yazar: Havva Merve Tuncer, T�rkiye

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