Investigation On The Interfacial Properties Of Nanomaterials Modified Cement-based Composite

Nano materials is an emerging and rapidly development of material science, it has became the hotspot in research of materials science. Due to the small size effect of nanomaterials in material physical and chemical properties, it has a significant impact on various fields.Concrete as the most widely used traditional architectural materials, along with the advance of human society and the increasingly development of science and technology, application range of it is more and more wide, the requirements of concrete performance is much higher.Many scholars mixed the nanometer materials with concrete to improve its performance reflecting the very good effect.Nano titanium dioxide and nano silicon dioxide have good performance and a wide range of applications in nanometer materials.In this paper, the main research contents including the following aspects:1. Nanoparticles for cement hydration performance: Mixed nano Ti O2 particles with cement and study on the improvement of the hydration degree, microtopograghy,distribution of the element, intensity, permeability,etc, to explore the improvement mechanism.Founding the enhance of the hydration of cement at early age.Visualizate the element distribution through matlab analysis software; quantitative the characterization of the nanometer materials and cement hydration products distribution, and analyzes their correlation, reveals mechanism of the nano materials on the properties of cement in the early and late.2. Nano-materials modified carbon fiber: prepared modified nano Si O2 solution by sol gel method and analysis influence of different factors such as temperature,PH on the impact of Si O2 nanoparticles size and then verify the product by TG, DTA,XRD. Treatment carbon fiber surface by oxidation, sol gel Si O2 solution modification,then observe carbon fiber morphology, analyzes the changes of Si of the carbon fiber before and after modification.3. Interface performance test on modified carbon fiber reinforced cement composite material: using monofilament pull-out tests to study the interfacial properties of modified carbon fiber reinforced cement composite;determin the pullout force based on the shear lag theory,then comparative analysis the enhancement effect and monofilament pull out load- displacement curve.Resulting the enhance of performance of interface and figure out the reason by microtopograghy and element analysis.