金属繊維補強ガンマー線重合ポリマー含浸モルタルの補強特性

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This program was carried out to investigate the effect of various steel fibers on mechanical strength and deformation characteristics of fiber reinforced polymer-impregnated concrete (FPIC) polymerized by gamma-rays under water(dose rate: 1×10^6 R/hr, 5 MR). Tested steel fibers consist of four kinds of fibers each with 0.35 mm diameter, piano wire, stainless steel, annealed stainless steel and low carbon steel (Table I). Fiber quantity and fiber length were varied within the range of F/C=5〜20% and length of 35 mm or 150 mm. Crimping effects of steel fiber which was trially formed to tridimensional waves (Fig. 1) were examined, and compared with normal straight fiber. Among the seven kinds of fiber examined, the straight piano wire was the most effective on increasing strength and plastic deformation of FPIC, and straight low carbon steel fiber was the most useful for fiber reinforced concrete with no polymer (FRC) . However, the tempering process of stainless steel fiber had no beneficial effect (Fig. 5) , and crimping of the fiber had the worse effects compared with normal straight one (Fig. 6) . Steel fiber has a remarkable contribution to increase the impact strength of PIC, and straight piano wire gives the wide plastic range to the deformation of PIC and also gives large toughness E_u especially (Figs. 11 and 12) . Ultimate flexural, compressive, tensile and Charpy's impact strengths and toughness of FPIC with F/C=15%, were as follows ; σ_b=586, σ_c=2283, σ_t=180, σ_<imp>=277 kg/cm^2 and E_u=40. 3 kg・cm/cm^2. These values are 7. 2, 4.2, 3.0, 24.3 and 192 times as large as those of control samples, respectively.
社団法人日本材料学会の論文
1976-06-15

金属繊維補強ガンマー線重合ポリマー含浸モルタルの補強特性

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