Product Description
Ultrafine fly ash microbeads
Key words
Ultra-fine fly ash microbeads, floating beads, UHPC, self-compacting concrete
Ultrafine fly ash microbeads, also known as floating beads, are highly active spherical glass bodies obtained from fly ash discharged from the chimney of coal-fired thermal power plants and collected by special equipment. The specific surface area is about 70 times that of cement, the natural bulk density is 670kg/m3, the water demand ratio is about 90%, and the 28d activity index can reach 110%.
The coal-fired thermal power plant has a highly active spherical glass body obtained by special equipment. The average particle size is about 1.3um, and the specific surface area is 800-1100m2/kg. Because the microbeads are extremely small, they can be filled into the coarse capillary pores inside the concrete, and the free water in the pores is released, thereby improving the fluidity of the concrete and reducing the The viscosity of concrete is obvious, which greatly improves the strength and durability of concrete.
Therefore, ultrafine fly ash microbeads are a new type of ultrafine powder material. Fly ash microbeads have excellent functions such as high activity, low heat of hydration, light weight, corrosion resistance, high compressive strength, good fluidity and good thermal stability, and can be used as a new type of active ultrafine aggregate for high performance concrete.
Performance advantage
Filler effect: The ultrafine particles are effectively filled in the voids of the concrete, the porosity is reduced, the density is increased, and the strength of the concrete is improved.
Activation effect: The active components SiO2 and Al2O3 in fly ash react with Ca(OH)2 generated during the hydration process to form calcium silicate hydrate gel and calcium aluminate hydrate crystals.
Water reduction effect: It can be proved that the finer the particles of the cementitious material, the greater the initial flow rate of the concrete, and the water-cement ratio can be reduced by 7% to 9% when the fluidity is the same.
Application
Self-compacting concrete, ultra-high-strength high-performance concrete
