Developing Geopolymer Concrete Properties by Using Nanomaterials and Steel Fibers

Autor:	W. H. Sofi, E. Rabiaa, Taher A. Tawfik, R. A. S. Mohamed
Rok vydání:	2020
Předmět:	Materials science Article Subject 0211 other engineering and technologies General Engineering Geopolymer cement 02 engineering and technology 021001 nanoscience & nanotechnology Nanomaterials Geopolymer chemistry.chemical_compound Compressive strength Flexural strength chemistry Ground granulated blast-furnace slag Sodium hydroxide 021105 building & construction Ultimate tensile strength TA401-492 General Materials Science Composite material 0210 nano-technology Materials of engineering and construction. Mechanics of materials
Zdroj:	Advances in Materials Science and Engineering, Vol 2020 (2020)
ISSN:	1687-8442 1687-8434
DOI:	10.1155/2020/5186091
Popis:	This research investigates the simultaneous impact of two different types of steel fibers, nanometakaolin, and nanosilica on the mechanical properties of geopolymer concrete (GPC) mixes. To achieve this aim, different geopolymer concrete mixes were prepared. Firstly, with and without nanomaterials (nanosilica and nanometakaolin) of 0, 2%, 4%, 6%, and 8% from ground granulated blast furnace slag (GGBFS) were used. Secondly, steel fiber (hooked end and crimped) content of (0, 0.5%, 1, and 1.5%) was used. Thirdly, optimum values of nanomaterials with the optimum values of steel fiber were used. Crimped and hooked-end steel fibers were utilized with an aspect ratio of 60 and a length of 30 mm. Geopolymer mixes were manufactured by using a constant percentage of alkaline activator to binder proportion equal to 0.45 with GGBFS cured at ambient conditions. For alkaline activator, sodium hydroxide molar (NaOH) and sodium hydroxide solution (NaOH) were used according to a proportion (Na2SiO3/NaOH) of 2.33. The hardened concrete tests were performed through the usage of splitting tensile strength, flexural, and compressive experiments to determine the impact of steel fibers, nanometakaolin, and nanosilica individually and combined on performance of GPC specimens. The results illustrated that using a mix composed of the optimum steel fibers (1% content) accompanied by an optimum percentage of 6% nanometakaolin or 4% nanosilica demonstrated a significant enhancement in the mechanical properties of GPC specimens compared to all other mixtures. Besides, the impact of using nanomaterials individually was found to be predominant on compressive strength on GPC specimens especially with the usage of the optimum values. However, using nanomaterials individually compared to using the steel fibers individually was found to have approximately the same splitting tensile strength and flexural performance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::19b7048504ac2629a12bc07113e73146 https://doi.org/10.1155/2020/5186091 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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