فهرس المقالات Basalt fiber

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  1 - Effect of Basalt and Polypropylene Fibers on Unconfined Compressive Strength of Cement-Stabilized clay, an Experimental Approach
  Seyed Hadi Sahlabadi Meysam Bayat Mohsen Mousivand Mohsen Saadat
  10.22094/jseg.2022.1931787.1110
  So far, many studies have been done on the performance of conventional chemical stabilizers such as cement, lime, fly ash or other chemical additives. However, very limited researches were conducted on the mechanical behavior of cement-stabilized soil with fiber inclusi أکثر

  So far, many studies have been done on the performance of conventional chemical stabilizers such as cement, lime, fly ash or other chemical additives. However, very limited researches were conducted on the mechanical behavior of cement-stabilized soil with fiber inclusion. Fiber-reinforcement of a stabilized soil offers new opportunities to improve ductility and strength characteristics of weak soils. The main objective of this research is considering the effects of curing time, initial moisture content, polypropylene fiber (PPF) or basalt fiber (BF) with or without addition of cement on the Unconfined Compressive Strength (UCS) of the clay soil. Different ratios of PPF or BF and/or cement were added to the soil to identify their influences on the UCS. The study finds that adding cement, PPF or BF to soil causes a remarkable increase in the strength. The strength of the PPF-reinforced specimens was observed significantly more than that of BF-reinforced ones. The strength of specimens increases gradually as the initial moisture content decreases and the cement content or curing time increases. However, the axial strain at failure for cement-stabilized specimens decreased with increasing cement content or curing time. Furthermore, it is concluded that the increase in UCS of combined PPF or BF and cement inclusions is more than the increase caused by each of them, individually. تفاصيل المقالة
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  2 - Investigation of Mechanical Properties of Lithium-Based Geopolymer Composites Reinforced with Basalt Fibers
  R. DavoudianDehkordi A. A Nourbakhsh H MonajatiZadeha
  Recently, geopolymer binders have been considered because of low cost, simple processes for synthesis and many raw materials in nature. Geopolymer with brittle nature does not have high strength and cannot be used alone for structural materials. Therefore, to use in dif أکثر

  Recently, geopolymer binders have been considered because of low cost, simple processes for synthesis and many raw materials in nature. Geopolymer with brittle nature does not have high strength and cannot be used alone for structural materials. Therefore, to use in different structures, the composite which is reinforced with fibers such as carbon, glass, basalt, etchasbeen used. In this research, influence of different parameters such as firing temperature and weight fraction of continuous basalt fiber on strength of lithium-based geopolmer composites reinforced by basalt fibers was studied. Firstly, raw materials for geopolymer preparation were calcined. Then, geopolymer matrix with specific molar ratio was made with three different weight percent of basalt fiber. The Molds were put in an oven and after that the composites were taken out of the molds. Then the samples were cured at three different temperatures. After heat treatment, C-MOR of composites was tested and flexural strength and fracture energy for different samples were calculated. The results showed that basalt fiber composites at 200˚C had high strength, but by increasing temperature the strength decreased. Also, Fracture energy of composites at 200˚C was higher than other temperatures. تفاصيل المقالة
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  3 - Creep Behavior of Basalt and Glass Fiber Reinforced Epoxy Composites
  رضا اسلامی فارسانی سید محمدرضا خلیلی وحید دقیقی رضا فاضلی
  The creep behavior of basalt fiber reinforced epoxy (BFRE) and glass fiber reinforced epoxy (GFRE) composites was studied through tensile testing at high temperature. To study the effect of reinforcing epoxy, the micro glass powder (MGP) was added at various volume perc أکثر

  The creep behavior of basalt fiber reinforced epoxy (BFRE) and glass fiber reinforced epoxy (GFRE) composites was studied through tensile testing at high temperature. To study the effect of reinforcing epoxy, the micro glass powder (MGP) was added at various volume percentage into the epoxy resin in BFRE composites. The initial strain for all the specimens were evaluated and compared with each other. No creep rupture failures were observed in short-term (less than 10000 seconds) high temperature (T= 150 and 200 °C) tensile creep tests at the loads up to 15% of the ultimate tensile strength (UTS) of the specimen. It was also found that the creep resistance of basalt fiber reinforced epoxy (BFRE) was higher than that of glass fiber reinforced epoxy (GFRE) and the materials are generally behaved as non-linear for all stresses and temperatures. Adding MGP decreased the initial strain of BFRE, but had no significant effect on the overall life time of BFRE. تفاصيل المقالة