What are the advantages and disadvantages of ash cement?
Ash cement offers many advantages over common cement, including reduced water throughput and increased strength. In case of incorrect creation, however, poor fly ash proves disadvantages, such as increased permeability of concrete and slow curing times. Properly produced fly ash and specific ratios are usually created by a quality concrete product that prevails over any disadvantage.
The real fly ash is the rest derived from burning coal; This clot can be mixed with other cement ingredients to make concrete. When the fly ash is mixed with cement components such as sand and aggregate, it fills small spaces in a mixture for an extremely cohesive substance. The resulting cement of ash resists water infiltration that can damage the final stiff concrete product; Any water trapped inside the cement mixture can expand and download with temperature deviations to eventually crack concrete.
Increased density of the cement of fly ash contributes to its high strength. Since the fly ash fills the MalThe slots in the cement mixture, the rest actually adhere to more components than the equivalent replacement, such as Portland cement. As a result, the final power of concrete after curing is significantly better than other types of cement.
The way in which fly ash is produced is very important for the properties of the cement mixture; A fly ash that is not sufficiently burned will have larger particles. These larger pieces will not fit into small components of concrete and in fact form new cavities or spaces. The resulting ash concrete is subject to water permeability, as the interior spaces are large enough to suit many liquid molecules.
The time of slow curing may also be a disadvantage to cement fly ash. The dense concrete structure does not allow very much to flush the air to infiltrate the gap between the molecules; As a result, the setting time is extended. For example, construction projects that require quick repair of concrete walls, may not want to use ash concrete because it will not harden enough to allow operation to flow nearby in a safe way.
On the other hand, some specific workers see more as an advantage than as a disadvantage. Fast cure times tend to produce fractures of tension through concrete, either along the surface or located internally. These cracks significantly reduce the strength of the concrete object. The time of slow curing allows you to constantly settle the ash concrete to the position, even at fluctuating temperatures.