Abstract
In order to study the mechanical properties and durability of cement-based composite with carbon nanotube, the test and analysis experiments are designed. Raw materials and related pharmaceutical instruments are prepared, to obtain cement-based composite with carbon nanotube samples by catalytic pyrolysis according to different proportions. The prepared sample is taken as the experimental object, and different bearing capacities are applied on different positions of the sample, to observe the change of the sample, and then, the experimental results of the mechanical properties of composite materials are obtained. The durability test results are obtained by combining the impermeability and frost resistance of the test object. The average compressive strength is 84.09 MPa, the average flexural strength is 16.9 MPa, and the crack resistance index is 22.5. In addition, the structure and diffusion coefficient of the sample also change in different degrees after the solution immersion and freeze-thaw treatment. Through longitudinal comparison, the more the carbon nanotubes are added into cement-based composite, the better its mechanical properties and durability are.
Highlights
Carbon nanotubes are one-dimensional quantum materials with special structure
Carbon nanotubes can be regarded as curled graphene sheets. erefore, according to the number of graphene sheets, they can be divided into single-walled carbon nanotubes and multiwall carbon nanotubes (MWCNTs)
In the cement-based composite materials, the analysis shows that the nanocarbon fiber controls the growth of nanoscale microcracks, while the bending strength, elastic modulus, and hardness of the composite materials are greatly enhanced
Summary
Carbon nanotubes are one-dimensional quantum materials with special structure. When various nanoparticles are incorporated into the matrix, nanocomposites are created that outperform conventional materials in terms of performance. At present, researchers all over the world are faced with the following common problems: the large-scale preparation of carbon nanotubes is still a bottleneck, which greatly limits the application of development and research of carbon nanotubes; the mechanical properties of carbon nanotubes and its reinforcement mechanism are not clear; the durability of cementbased composite materials is almost not studied. To solve these common problems, we need to strengthen the cooperation between material researchers and experts and scholars in the field of chemistry. Through modeling and simulation to strengthen the research of growth phenomenon and mechanism, the experimental analysis results on the durability of composite materials are obtained, so as to truly realize its application in the field of cement concrete
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