Wpływ nanocząsteczek grafitu na wytrzymałość i odporność na karbonatyzację zaprawy cementowej

• Autorzy: Zheng Xiaoqing

Identyfikatory

DOI

10.32047/CWB.2020.25.6.6

Warianty tytułu

EN

Effect of graphite nanoparticles on strength and carbonation performance of cement mortar

• Języki publikacji: PL EN

Abstrakty

PL

Wytrzymałość i odporność na karbonatyzację to dwa główne problemy w przypadku porowatych materiałów cementowych, narażonych na działanie atmosfery o zwiększającym się stężeniu CO2. W ostatnich dziesięcioleciach przeprowadzono szerokie badania nad wzmacniaczami węglowymi. Praktyczne ich zastosowanie jest jednak utrudnione przez duże koszty. W niniejszym artykule wykorzystano tanie nanocząstki grafitu do poprawy właściwości zaprawy cementowej. Oceniono wytrzymałość na ściskanie i odporność na karbonatyzację. Przeprowadzono badania składu fazowego i mikrostruktury w celu analizy mechanizmów działania. Wyniki wykazały, że efekty działania nanocząstek grafitu różniły się zależnie od dozowania. Dodatek nanocząstek grafitu w ilości 0,5% masowego znacznie zwiększył odporność na karbonatyzację, podczas gdy nieznacznie pogorszyła się wytrzymałość na ściskanie. Dodatek 1,0% zwiększył zarówno odporność na karbonatyzację jak i wytrzymałość zaprawy cementowej po karbonatyzacji.

EN

Strength and carbonation performance are two main concerns in porous cementitious materials exposed to the atmosphere with an increasing concentration of CO2. Carbon-based reinforcers have been widely investigated in recent decades. However, practical applications have been impeded by their high cost. In this paper, inexpensive graphite nanoparticles were used to improve cement mortar. The compressive strength and carbonation performance were evaluated. XRD and SEM-EDX tests were conducted to further analyse the mechanisms. The results showed that the effects of graphite nanoparticles differed in dosage. The addition of graphite nanoparticles in the amount of 0.5% by mass significantly enhanced the performance against carbonation, while slightly worsened the compressive strength. On the contrary, 1.0% addition enhanced both the performance against CO2 penetration and strength of cement mortar after carbonation.

Słowa kluczowe

PL

nanocząsteczka grafitu; zaprawa cementowa; karbonatyzacja; wytrzymałość; trwałość

EN

graphite nanoparticle; GNP; cement mortar; carbonation; strength; durability

• Wydawca: Fundacja Cement, Wapno, Beton
• Czasopismo: Cement Wapno Beton
• Rocznik: 2020
• Tom: R. 25, nr 6
• Strony: 495--504
• Opis fizyczny: Bibliogr. 35 poz., il., tab.

Twórcy

autor

Zheng Xiaoqing

• School of Engineering, Fujian Jiangxia University, Fuzhou, Fujian, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).