Laboratory Study Nanometer Concrete And Simulation Analysis The Application Of Nanometer Concrete

Concrete has been extensively used to ground treatment, however, engineering experiences suggest that specifically environment and high require of the important part has restricted its further application in the engineer. To improve engineering propertied, many additives have been added to concrete. With the progress of nanometer technology, nanometer materials have been applied to modify cement-based materials, so it is a tail to introduce nanometer material with particular characteristics to concrete as a new kind of additive.In the paper, the mechanical property of nanometer concrete (compressive strength , antiflex strength , elastic modulus ) is researched in detail, and according to the Finite Element Method simulation analyzed temperature field and temperature stress of the nanometer concrete. Some work and achievements in the research as follow:1. A mechanic properties of nanometer concrete tests are performed, and the nanometer concrete fervent physical propertied are measured. Based on the experimental data, the expression of mechanic properties of nanometer concrete is obtained with the way of curve fit.2. According to the thermal conduct theory and Finite Element Method, sumilated and analyzed introduced the temperature field in nanometer concrete box girder bridged.3. The temperature stress in box girder is sumilation calculated in two-dimension model and three-dimension model respectively, two results arecompared each other too.Both test and analytical result show that: nanometer concrete have favorable mechanic properties. In the paper, it is suggest that Nano-SiO₂ additions 1.0-1.5% to concrete substitution for cement 3.33-10% in the engineering experiences. According to analytical and derivation, the relations of nanometer concretecompressive strength and elastic modulus is E = Fq_u + M , the relations of regression coefficient are performed:...