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Additional Benefits
Bonded Screed
This is the type of screed where the screed layer is bonded fully to the substrate using a primer or bonding agent. This type of screed is ideal for thinner section screeds where heavy loading is expected. A bonded screed is generally of 15-30mm thick.
Un-Bonded Screed
As the name suggests, un-bonded screeds are not bonded directly to the base, as mechanical scabbing is not possible. Un-Bonded screed is applied to Polythene/ Damp Proof Membrane (DPM) laid on top of the concrete base, which separates it from the main slab. This type is ideal for thickness greater than 50mm for standard screed and 40mm for modified screeds.
Floating Screed
For this type of screed, the screed layer is laid on top of insulation to create thermal insulated flooring.
Site Mixing of Screed
Site mixing of screed is a very efficient and economic way of screed mixing and is suitable for most projects, provided the screed is force action mixed and the work is handled by a skilled work force. The three methods that we generally for site mixing of screeds are:
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Forced Action Mixers: Forced action mixing is the most efficient and economic method for producing high quality screed mixes on site. Forced action mixing blends the cement & mix homogeneously and is ideal when additives or admixtures are to be added. Forced action mixers are usually of two types:
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Screed Pumps: These are generally used for forced action mixing of large quantities of screed at the work site.
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Pan Mixers: These are portable forced action mixers which are ideal for producing high quality screed mix at work sites where the use of bigger equipment's is difficult.
2. Hand Mixing: This is suitable only for very small areas and is not recommended for bigger projects, as the work is strenuous and the estimated quantities and manual errors while mixing can seriously affect the quality of the screed.
3. Free Fall Mixers: Sometime we use free fall mixers for larger quantities of screed at the work site. When these are sufficient for mixing general concrete mixes and mortar which are of a fluid consistency, screeds mixed using free fall mixers are often found to be of poor quality, weak and crush easily under impact.
Ready Mix Screed
Ready Mix Screed is considered to be a good option for work sites where the storage of materials is difficult. But there is always the drawback of heavy traffic posing as a hurdle in getting the screed at the site on time..
For this we have specially designed trolleys; that can carry up to 1ton of mortar weight & can fit into lifts & enter into a small passage. It is advantageous for pouring screed in areas where pumping is difficult or impossible, e.g. Glass closed buildings, working area, shopping malls etc. Special mechanism allows unloading in no time
One way to achieve the proper elevation and smoothness is to use a screed. The screed's surface is generally smooth and flat, but it can be shaped in any formation to help you achieve the surface you need. Since no concrete pour is the same nor of the same size, different types of concrete screeds are needed. For achieving best results it is best to have the right tool for the right job.
1. Magnesium Screed
A magnesium screed is another form of a hand screed. It deserves a category all to its own thanks to its distinctive characteristics. Thanks to being made of magnesium it is not only light but capable of being up 24 feet long.
2. Hand Screed
This screed resembles a long board with two handles that extend upwards at each end. These screeds can be of varying lengths. However, screeds like these are not effective for surfaces more than 30 feet wide, though 10 feet is the optimum size. Two workers draw the screed across the surface of the concrete in a sawing motion an inch or so at a time. The screed rests on the edges of the concrete form as it moves across the surface of the concrete, thus filling in any voids or removing an access.
3. Mechanical Screed
A mechanical screed is advancement on a hand screed. This screed can be used on wider surfaces and is able to include vibration as well. Since the mechanical screed is capable of vibrating the concrete while it screeds, which saves a step in the process of finishing the concrete. When hand screeding, it's necessary to follow with a vibrating machine. The vibrating process is necessary, for it helps to push the coarse aggregates contained in the concrete downward, thus consolidating and compacting the concrete.
4. Roller Screed
A roller screed can be 6 to 43 feet long and has the form of a long, seamless pipe. Like a hand screed, it rests on the concrete form as it's dragged across the concrete. However, like a mechanical screed, it also has a motor which causes the roller to revolve in the opposite direction than its being pulled. Like a vibrator, the roller screed compacts the concrete as it revolves. This screed can also be used on inclined surfaces.
5. Truss Screed
The truss screed, like the roller screed, is capable of screeding a wide area--up to 65 feet. Thanks to the truss design that stabilizes it, it can span wide areas without twisting or torque. It can also have a vibratory action that helps to compact the concrete as you screed it. The truss screed can come with self-propelled winches that can, as Southern Tool states, "save labor."
SCREED FINISHING & CUTTING
1. Power Float/Trowel
In some cases this screed can be applied to garage floors or outside areas where suitable. After application this screed is brought to a shine with a power float and pan. This leaves a super smooth top which prevents abrasion and corrosion that can be sealed or painted. In areas where this is not strong enough we lay concrete which is also brought to a very smooth finish.
2. Bull Float
The purpose of bull floating is to level ridges and fill voids left by the screeding operation. Drawing a bull float over the fresh concrete immediately after screeding is required to force down aggregate and raise cream (gravel-free concrete) near the surface for finishing. Bull float is used for areas too large to reach with a darby, though it may produce a wavier surface.
3. Screed Cutter
In hot weather, concrete might crack if joints are not cut within 6-12 hours after finishing screed. In this condition, we can early-entry dry-cut lightweight saws that can be used almost immediately after finishing instead of using a grooving tool to cut joints,. These saws cut 1" to 3" deep, depending on the model.
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