Wpływ nanometrycznego karbonizatu z łupin pestek moreli na właściwości mechaniczne kompozytów cementowych

Sisman, Mehmet; Teomete, Egemen; Yanik, Jale; Malayoglu, Ugur; Tac, Gozde Duman

doi:10.32047/CWB.2023.28.1.1

Artykuł - szczegóły

Tytuł artykułu

Wpływ nanometrycznego karbonizatu z łupin pestek moreli na właściwości mechaniczne kompozytów cementowych

Autorzy

Sisman Mehmet , Teomete Egemen , Yanik Jale , Malayoglu Ugur , Tac Gozde Duman

Wybrane pełne teksty z tego czasopisma

http://www.cementwapnobeton.pl/

Identyfikatory

DOI

10.32047/CWB.2023.28.1.1

Warianty tytułu

The effects of apricot kernel shell nanobiochar on mechanical properties of cement composites

Języki publikacji

PL EN

Abstrakty

Waloryzacja odpadów rolniczych jest ważna zarówno pod względem ekonomicznym jak i środowiskowym. Celem pracy było zbadanie możliwości wykorzystania karbonizatu z pestek moreli jako wypełniacza do poprawy właściwości mechanicznych zaprawy i wspomagania sekwestracji CO2. Karbonizat został wyprodukowany w wyniku pirolizy łupin pestek moreli w temperaturze 500°C. Karbonizat o wymiarach mniejszych niż 500 nm otrzymano w procesie wysokoenergetycznego mielenia kulowego. Do określenia morfologii ziaren karbonizatu użyto skaningowego mikroskopu elektronowego. Krbonizat w różnych procentach objętościowych [0,00-0,04-0,06-0,08-0,12-0,15%] dodawano do zaprawy. Zaprawę formowano w beleczki o wymiarach 40x40x160 mm. Po dojrzewaniu w wodzie w temperaturze 20°C przez 28 dni wykonano badania wytrzymałości na ściskanie i zginanie. Mieszanka zawierająca 0,04% objętości nanometrycznego karbonizatu wyróżniała się wzrostem wytrzymałości na zginanie i ściskanie odpowiednio o 5% i 15%, a jej energia pękania przy zginaniu i ściskaniu wzrosła odpowiednio o 98% i 38% w stosunku do zaprawy referencyjnej. Ponadto, w mieszance o zawartości 0,12% objętości nastąpił wzrost wytrzymałości na zginanie i ściskanie odpowiednio o 32% i 11%. Natomiast wzrost energii pękania przy zginaniu i ściskaniu wyniósł odpowiednio 52% i 25% w porównaniu z zaprawą referencyjną. Wyjaśniono mechanizmy wpływu nanometrycznego karbonizatu na płynięcie, wytrzymałość i energię pękania. Ziarna karbonizatu mostkują pęknięcia, odwracają je, działają jako miejsca nukleacji hydratacji, wzmacniają matrycę przez jej porowatą strukturę i rozwijają wewnętrzne twardnienie, co prowadzi do wzrostu wytrzymałości i energii pękania. Badanie to wykazuje, że karbonizat produkowany z łupiny pestek moreli ma potencjał do wykorzystania jako mieszanina sekwestrująca węgiel w celu poprawy efektywności zaprawy, a tym samym wykorzystania odpadów jako materiału budowlanego, przyczyniając się do rozwoju gospodarki i ochrony środowiska.

Valorization of agricultural wastes is important both economically and environmentally. This study aimed to investigate the use of biochar as a filler to improve the mechanical properties of mortar and to help sequestrate CO2. The biochar was produced by pyrolysis of apricot kernel shell at 500°C. Nanobiochar particles with dimensions less than 500 nm were obtained by high-energy ball milling process. Scanning electron microscope was used for determining the morphology of nanobiochar. The nanobiochar at different volume percentages [0.00-0.04-0.06-0.08-0.12-0.15%] was added to mortar. The mortar was casted into 40x40x160 mm molds. After water curing at 20°C for 28 days, compressive strength and flexural strength tests were performed. The mixture containing 0.04% nanobiochar by volume had an increase in flexural and compressive strengths by 5% and 15% respectively, while its fracture energies for flexure and compression increased by 98% and 38% respectively compared to the reference mortar. Furthermore, the mixture having 0.12% volume had an increase in flexural and compressive strengths by 32% and 11%, respectively, while the increase in fracture energies for flexure and compression was 52% and 25%, respectively, compared to the reference mortar. The mechanisms of nanobiochar effect on flow, strength, and fracture energy were enlightened. The nanobiochars bridge the cracks, divert the cracks, act as hydration nucleation sites, enhance the matrix by its porous structure, and developed internal curing that led to increase in strength and fracture energy. This study suggests that the biochar produced from the apricot kernel shell has the potential to be used as a carbon sequestering mixture to improve performance of mortar and thereby utilizing waste as a construction material, contributing to the economy and environment.

Słowa kluczowe

zaprawa właściwości mechaniczne karbonizat łupina pestki moreli sekwestracja dwutlenku węgla

mortar mechanical properties nanobiochar apricot kernel shell carbon sequestration

Wydawca

Fundacja Cement, Wapno, Beton

Czasopismo

Cement Wapno Beton

Rocznik

2023

Tom

R. 28, nr 1

Strony

2--15

Opis fizyczny

Bibliogr. 44 poz., il., tab.

Twórcy

autor

Sisman Mehmet

autor

Teomete Egemen

egemen.teomete@deu.edu.tr

Department of Civil Engineering, Dokuz Eylul University, Izmir, Turkey

autor

Yanik Jale

Department of Chemistry, Ege University, Izmir, Turkey

autor

Malayoglu Ugur

Department of Metallurgical and Materials Engineering, Dokuz Eylul University, Izmir, Turkey

autor

Tac Gozde Duman

Department of Chemistry, Ege University, Izmir, Turkey

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Bibliografia

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