Influence of reactive fillers on concrete corrosion resistance

International Conference on Mechanical Engineering, Automation and Control Systems 2017

机械制造;无线电电子学;计算机科学

Rakhimbayev, Sh.M.^1 ; Tolypina, N.M.^1 ; Khakhaleva, E.N.^1

Belgorod State Technological University Named after V.G. Shukhov, 46 Kostyukov St., Belgorod

308012, Russia^1

关键词: Active fillers;    Cement concrete;    Cement matrix;    Contact layers;    Contact surface;    Diffusion delays;    Hydrated calcium silicates;    Reactive fillers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/327/3/032046/pdf
DOI  :  10.1088/1757-899X/327/3/032046

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Contact surfaces represent the weakest link in a conglomerate structure of materials. They ensure the diffusion of aggressive agents inside the material. To reduce the conductivity of contact surfaces it is advisable to use reactive fillers, which interact with cement matrix via certain mechanisms, which in turn, reduces the permeability of the contact layer and fosters durability of products. The interaction of reactive fillers with calcium hydroxide of a concrete liquid phase in a contact area leads to the formation of hydrated calcium silicates of a tobermorite group. Such compounds, being settled in pores and capillaries of a product, colmatage and clog them to some extent thus leading to diffusion delay (inhibition) with regard to aggressive components of external media inside porous material, which in turn inhibits the corrosion rate. The authors studied and compared the corrosion of cement concrete with a standard filler (quartz sand) and a reactive filler (perlite and urtit). The experiments confirmed the positive influence of active fillers on concrete corrosion resistance.