- Community Sites
REVIEW: Fly Ash Concrete performance was mainly due to 10 ~ 40 & mu; m in the presence of particles. Use of fly ash can be a ball mill powder having an average particle size of 1 ~ 5 & mu; micron ash m, and it can be formulated as an admixture with a super-high flowability
Improve the performance of fly ash concrete is mainly due to the presence of 10 ~ 40 ?m particles. Mill powder machine using fly ash can be prepared micron average particle size of the fly ash 1 ~ 5?m, which can be formulated as an admixture ultra high strength concrete with high fluidity.
Fly ash from the flue gases after combustion of coal down to be collected in the fine ash which is discharged from coal-fired plants mainly of solid wastes. Fly ash after ground ball after a great use value, especially as concrete admixtures, can greatly improve the performance of concrete achievements of ultra high strength concrete.
High strength concrete means 80 MPa compressive strength of concrete. The incorporation of high-grade cement superplasticizer, silica fume or other active mineral powder is formulated in one of the technical ways to ultra high strength concrete. Incorporation of the active particles in the concrete, the particles of calcium hydroxide overbased calcium silicate hydrate and a secondary reaction to produce a low-alkali silicate hydrate, the gelling material increases, thereby improving the hole of the concrete, improve the strength of concrete. Fly ash is one of the active material powder, but due to the uneven quality of fly ash as high performance concrete admixtures effect is not particularly good, which limits the scope of its use. Therefore, we often fly ball mill grinding process to enhance the activity of fly ash in order to achieve its significant role in the preparation of super concrete.
Fly ball to the "achievements" ultra high strength concrete it?
On the one hand, ball fly ash concrete pore structure can be improved. After the ball fly ash, the particle size is much smaller than the cement, and the distribution is narrow, can be incorporated into the cement after the cement to fill voids and reduce porosity of the cementitious material to achieve a dense filling structure, can improve the mobility, but also improve the strength of hardened cement matrix, play micro aggregate effects of ultrafine particles.
On the other hand, can improve the interface ball fly ash concrete. Fly ash cement and concrete are made at all levels of the dispersed phase dispersed in a continuous phase formed at all levels of the composite material. There is an interface between the phase to phase, and the interface is often considered the weak link in the mechanical properties, improve the interface structure can effectively improve the fly ash cement, concrete. after the fly ball, increasing the reaction surface,, ash activity has greatly improved, hydration capacity enhancement, is conducive to improving the interfacial adhesion promote concrete strength.
In summary, after a ball mill grinding and processing of fly ash is a premium high-performance concrete admixture, can be formulated in the ultra-high strength concrete with high fluidity.
- Downloads (Total):
- Downloads (Daily):
- Submitted By
- peanuts 1
- Discovered On:
- Nov. 3, 2014
(No Image Available)
There are not yet enough votes to show a realistic score.
If you were logged in you could rate this.
Support Nibbits by linking to us: