Multi-walled carbon nanotubes(MCNT)modified mortar blocks were prepared by separating MCNT by surfactant,magnetic stirring and ultrasonic dispersion technology.The basic mechanical properties were studied and the optimum fiber content was determined.The test results of mortar blocks and foam concrete blocks showed that similar to cement-based materials,MCNT could effectively play the role of nano-nucleation and mechanical interlocking in geopolymer materials by adding MCNT into geopolymer materials,which could effectively improve the mechanical properties such as flexural strength,compressive strength and water absorption.When the dosage was 0.12％-0.14％,the overall properties of geopolymer materials could be improved perferable.When the content of MCNT was 0.12％,the 28 d compressive strength of geopolymer foam concrete was increased by 10.33％,and the volume water absorption was decreased by 14.44％.Nano-fiber modification of geopolymer materials could further enrich and broaden its application fields,and could also provide reference for similar research.
维普
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