The effect of glass water on mechanical characteristics and durability of multi-component pozzolanic geopolymeric mortar containing basalt fibers

Document Type : Original Research

Author
S. H. ghasemzadeh mousavinejad
university of guilan
10.22034/24.4.103
Abstract
Cement is one of the most widely used construction materials in the world. Considering that the production of cement is polluting and for every one ton of cement produced, one ton of carbon dioxide gas enters the atmosphere. Therefore, for this reason, most of the research in recent years is to replace cement with a new environmentally friendly material. Is. The result of this research led to the identification and introduction of a new substance called ferrock. Ferrock as a compound is an iron binder that yields a variety of waste materials to form a carbon-negative building material. To make this new material, iron dust is used along with proportions of limestone powder, fly ash, metakaolin and oxalic acid. It shows the best usage of iron ore waste powder obtained during the mining process that is just dumped away from the mines, causing air pollution, health hazards and also consuming larger area. The product indirectly reduces the carbon dioxide released by its unique strength gaining mechanism, which is in contrary with that cement and thus stands out among many other supplements of cement. Ferrock involves a curing process with carbonation and air curing in varied number of days for better strength in terms of compression, tensile strengths and achieving desirable properties. Ferrock is thus a more promising eco friendlier binding material in terms of its carbon negativity and in best usage of the waste. Although implementing Ferrock may require an initial investment, the long-term advantages of reduced maintenance costs and improved sustainability contribute to its overall value proposition. Iron dust in the form of powder (size less than 90 microns) and fine aggregate (size between 150 microns to 2.36mm) is used to develop the iron carbonate matrix which is major binding material in ferrock and they considered light . In this research, the aim is to investigate the durability and resistance of geopolymeric mortars containing ferrock and basalt fibers against high temperature, therefore, for this purpose, different proportions of ferrock and slag are replaced with hydraulic cement and mortar samples are prepared with different percentages of basalt fibers. . Then the 28-day samples are tested at temperatures of 200 and 600 degrees. The results of these tests show that the strength of geopolymer mortar containing frac has a slight drop (14%) at 200 degrees but a noticeable drop (50%) at higher temperatures, also the results show that the samples with percentage Fewer fibers (0.3%) have gained more compressive strength after 28 days. Increasing the amount of sodium silicate and decreasing sodium hydroxide, as well as increasing the replacement percentage of basalt fibers leads to greater resistance in the period of 7 to 28 days after construction, but after high temperature, a more noticeable drop in the compressive strength of these samples can be seen. The higher the ratio of sodium silicate to sodium silicate of the manufactured samples and the more fibers are used to replace the slag in the sample, the higher the tension due to bending is obtained.

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Modares Civil Engineering journal
Volume 24, Issue 4
September and October 2024
Pages 103-113