Surface Modification of Basalt Fiber and Its Influence on Mortar Properties
In order to improve the interface bonding force between basalt fiber and cement-based material,different mass fractions of silane coupling agent(KH550)solution,nano SiO2 and KH550 composite solution were used to modify the surface of basalt fibers.The surface morphology,fiber grafting rate,fiber corrosion resistance and mechanical properties of modified fiber cement mortar were studied.The results show that,whether using KH550 solution or nano SiO2 and KH550 composite solution to modify the surface of basalt fibers,all basalt fibers have particles attached to their surfaces.As the mass fraction of KH550 increases and the content of nano SiO2 increases,the attached particles and grafting rate of fibers gradually increases,and the corrosion resistance gradually improves.After adding modified basalt fibers,the compressive strength and flexural strength of cement mortar have been improved.This is because the surface modification of basalt fibers increases the mechanical biting force and chemical bonding force between basalt fibers and cement-based materials.
surface modification of basalt fiberKH550nano SiO2experimental studymortar mechanical propertiesgrafting rate
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