Construction Machine Blog

As we all know, without concrete, no modern building can be set up. Nearly every construction project needs concrete as well as concrete mixer. However, there is one problem with using concrete. That is how the building workers ensure concrete spread smoothly and flatly. This tough task is accomplished by the concrete vibrator, a very important equipment which usually ignored by many of us.

A concrete vibrator is a construction tool used on concrete pouring sites. A variety of manufacturers build concrete vibrators and an assortment of attachments designed for multiple applications. A concrete vibrator is used to ensure that a concrete pour is even and free of air bubbles so that the concrete will remain strong and have a smooth finish.

Concrete Vibrators are working

Although it also works without concrete vibrators in those small jobs, a concrete vibrator is essential on large load bearing projects.

Basics of Concrete Vibrators

Concrete vibrator designs range in size from small battery-powered wands to much larger plug-in versions that be used on very deep pours. In all cases, a concrete vibrator that can reach the bottom of the pouring forms should be used, ensuring even treatment of the entire concrete pour. Attachments for the concrete vibrator are selected on the basis of the depth of the pour and the type of concrete being used.

A concrete vibrator uses an off-centered weight, which is spun as much as 10,000 times a minute, causing large air pockets in the concrete to disperse as the concrete is shaken. Especially in pours of low slump concrete, which uses minimal water, the use of a concrete vibrator is essential to ensure that the concrete does not bubble or form holes. In cases where consumers will be looking at the finished concrete, as is common in some schools of design that employ concrete counters and floors, use of a concrete vibrator will present an even and attractive surface, rather than one that may be slightly ragged.

 Parts and types of Vibrators

Correct Operation of a Vibrator

Proper use of a concrete vibrator requires some training. The head of the concrete vibrator should always be slowly lowered into the pour and pulled out gradually to avoid the formation of an air pocket. A concrete vibrator should never be dragged through a pour, because it will leave a groove in the concrete behind it. The amount of time required varies depending on the mix, but it does not usually take more than 30 seconds to settle the concrete sufficiently and move on to the next section of concrete.

If a concrete vibrator is used incorrectly on a concrete mix with a wide range of material sizes, it may cause the larger rock pieces to settle to the bottom, making the concrete weaker. In addition, a concrete vibrator can push rock and gravel away from the area being shaken, causing weaker concrete paste to fill the area, which may result in instability. The goal in using a concrete vibrator is to build a strong matrix of material that will withstand years of use. If the concrete vibrator is used correctly, the operator will see large bubbles floating to the surface of the concrete pour, and a layer of mortar will appear on the surface to indicate that the concrete is evenly mixed and unlikely to have air pockets and honeycombing.

check the working of vibrators

Of course, to become a qualified operator to achieve such an effect, a long time of practice shall be taken.

In my last post, I show you how to repair concrete, which is a common task that many people would have to deal with. Besides repairing, another thing that people always do with concrete is to clean it. So today I would like to teach you how to do the cleaning.

clean concretes are beautiful

Concrete surface round the home the surface of concrete road can get dirty easily. From oil stains on a concrete driveway or garage floor to spills on concrete slabs around pools, there is likely to be a need to engage in concrete cleaning at one time or another. If you are faced with the task of ridding your concrete surfaces of blemishes and stains, here are some methods that may be ideal for your situation.

One of the more common issues with concrete drives and garage floors is the presence of deep stains. These are usually created by oil spills and other fluids that leak from the engine of a vehicle. Fortunately, there are a couple of simple methods that will make a big difference when cleaning concrete. First, purchase a highly absorbent brand of cat litter. Sprinkle the litter over the stain and leave it in place for a couple of days. Sweep the litter away and examine the stain. Cat litter will lift a stain that has not seeped too deeply into the concrete. If the stain is now gone, you are done.

cat litter

sprinkle cat litter over the stain

When a more stubborn stain is present, you will need to apply a second strategy to the task of cleaning concrete. Place an even layer of concrete powder over the stain. Make sure the powder is dry, and do not allow it to get wet from rain while the layer is setting on the concrete surface. The powder will leach into the concrete and draw the deeper stain out of the concrete. As with the cat litter, allow the powder to remain in place for a couple of days, then remove the powder. The stain will be gone in most cases.

However, if these simple approaches to cleaning concrete do not completely clear the stain, you will need to employ a power washer. Make sure to use a cleaning agent that is recommended for power washing concrete surfaces. While you can try a pressure washing with hot water, that really stubborn stain is much more likely to disappear by using a power washer.

One way to minimize the chances for a deep stain is to apply a sealant to the concrete once the surface is clean. By creating a barrier between the concrete and any liquids or other agents that may spill onto the surface, you can make the task of cleaning concrete much easier and also save you a lot of money on equipment rental. The sealant will also give your concrete surface more of a finished look, which will only enhance the appeal of your home.

apply a sealant to the concrete

Reading this title, I suppose many of you may burst in laughter.

“Are you kidding me? Is there any technique in repairing concrete?” Some readers would question.

cracked concrete

concrete repair

The answer is absolute yes. Although repairing concrete is common and plain work, it calls for techniques too. Regardless of them, you cannot do the repairing well. For the worse, you can even make yourself hurt. Generally speaking, the whole process of the repairing can be divided into the follow steps.

Safety is always the first step in the process of doing anything. Always wear eye protection, as concrete tends to crumble and the tiny pieces can cut your eyes, causing permanent damage. It is also recommended to wear gloves to prevent smashing your fingers or cutting your hands.

wear gloves

do not forget your glasses

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 Concrete is a kind of man-made stone. You make it by mixing limes, clay, sand and water. You can do the mixing either by hand or by machine. The machine is called a concrete mixer, or a cement mixer. This blog is covering the history of both concrete and concrete mixer briefly.

History of concrete

So far as we know, the Egyptians, the Mesopotamian and Greeks were among the first who used concrete, but they did not use it quite often. In stead, It is the Romans who began to use it a lot in their buildings about the time of emperor Nero, 60 AD. From then on, they used it more and more. That is why many old Romanic architectures we can still see today are made of concretes.

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