Gunite machine used for raft foundation
2020-03-16 16:10:12
Gunite machine is used for raft foundation
Rotor type gunite machine is in the thin stream process, there are two line compressed air from air compressor, one line compressed air blow materials from above of the rotor out of whirl stream implement, another line compressed air blow materials to nozzle from the whirl stream implement. Rotor type gunite machine is divided into dry mix gunite machine and wet mix gunite machine. For dry mix gunite machine, add water in the nozzle, while wet mix gunite machine, add accelerator in the nozzle.
Gunite machine is mainly used for dry mix shotcrete and wet mix shotcrete. It has some obvious advantages such as advanced technology, perfect structure, stable performance, convenient operation and long service life etc.
What is raft foundation?
Raft foundations (sometimes known as Mat Foundations) are a large concrete slab which can support a number of columns and walls.
The slab is spread out under the entire building or at least a large part of it which lowers the contact pressure compared to the traditionally used strip or trench footings.
Because of the speed and volume of houses required after the second world war, the raft foundation was widely used. The raft foundation was cheaper, easier to install and most importantly, did not require as much excavation as the usual strip foundations.
When is raft foundtion used?
Rafts are most often used these days when the strata is unstable or (because of this) a normal strip foundation would cover more than 50% of the ground area beneath the building. There are also situations (usually in areas where mining has occurred) where there may be areas of movement in the strata.
They are much more commonly used in the construction of commercial building in the UK that they are for domestic homes, but can be used very successful in both situations.
How do raft foundations work?
A raft foundation spreads the weight of the building over the whole ground floor area of that building. The raft is laid on a hardcore, or scalping bed and usually thickened at the edges, especially in very poor ground. Rafts are most suitable when the ground is of good load bearing capacity and little work is required to get a solid foundation.
Raft Foundations are built is this following steps:
The soil removed down to correct depth.
The foundation bed is then compacted by ramming.
Lay reinforcement on spacers over the foundation bed.
Pour the concrete over the reinforcement.
The foundation may stiffened by ribs or beams built in during construction which will add extra strength and rigidity.
Our gunite machine is widely employed in mining, tunnel, culvert, subway, hydropower engineering, underground excavation engineering etc.
If you are interested in our gunite machine, please let me know the following demands about gunite machine:
1. What's the project you will use the machine do, for slope protect, or other?
2. Do you need dry-mix shotcrete machine or wet-mix shotcrete machine?
3. What's the output you need, 3m3/h, 5m3/h, 9m3/h, or other?
4. What's the maximum particle size of the material, less than 10mm, 15mm, or 20mm?
5. About the engine, do you need air motor, electric or diesel ? What voltage it is on your local? It is 3 phase 380V 50Hz in China.
Please tell us your requirements and we will provide you with the corresponding product parameters and quotations. My email is sales@leadcrete.com, Looking forward to your reply!
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