STUDY ON THE EFFECT OF ACID TREATMENT ON THE PERFORMANCE OF BASALT FIBER ASPHALT

Abstract

Abstract: In order to enhance the reinforcement and strengthening effect of basalt fiber (BF) in asphalt, surface treatment of BF by 1.0 mol/L and 2.5 mol/L HCL solution was performed. The surface morphology of BF was observed by environmental scanning electron microscopy (ESEM) and infrared spectroscopy. The results show that the surface of original BF was smooth, but the BF showed overall erosion after HCL solution treated. And the BF surface forms a silica gel layer, and the -OH content has increased. Conventional performance and tensile fracture morphology of the basalt fiber asphalt were characterized by softening point, 5 ℃ force-ductility and ESEM test. With the increase of HCL solution concentration and treatment time, the performance of BFA is firstly improved and then decreased. It can be clearly seen from tensile fracture morphology of BFA that the surface of BF treated with acid solution is coated with a thin asphalt film. And the best treatment time and concentration of HCL solution for BF erosion were 20 min, 2.5 mol/L.

Key words: road engineering, basalt fiber (BF), hydrochloric acid (HCL), surface treatment, performance improvement

CLC Number:

TB332

LIU Chun-bo, LIU Sheng. STUDY ON THE EFFECT OF ACID TREATMENT ON THE PERFORMANCE OF BASALT FIBER ASPHALT[J]. Fiber Reinforced Plastics/Composites, 2019, 0(3): 55-60.

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