Some of you may be wondering what steel surface preparation is and why it is important in concrete roof repairs. It was briefly described in my previous post as cleaning the rusted steel reinforcement bars. Steel surface preparation is related to cleaning of rusted steel reinforcement bars.
It is important to do clean them thoroughly and all around the circumference of the bars without leaving any rust. The surface area behind the rusted bars is often overlooked in concrete roof repairs. This is one of the factors that contributes to concrete cracks and concrete spalling after a few months of completing the concrete roof repair.
The steel reinforcement bars need to be cleaned so that the next treatment or concrete repair product can bond well with the bars including their whole circumference and the parent concrete behind the bars. Proper cleaning prevents concrete spalling in future.
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Cleaning of steel reinforcement bars manually takes time when the area of concrete roof repair is large. Another option is to clean these corroded bars using mechanical equipments.
Wednesday, November 17, 2010
Tuesday, November 16, 2010
What Is The Next Treatment After Steel And Concrete Surface Preparation?
A new piece of cloth sewn to patch a hole in dress or shirt usually shrinks. Similarly, a new concrete will not stick well to the parent or existing concrete. But let that not stop you from carrying out the next step in concrete roof repairs.
The market is flooded but not yet saturated with various products to make the new concrete or concrete repair material stick well onto the parent concrete and steel reinforcement bars. One good tip is to choose a cementitious bonding product or agent. Such products do not have any time limitation in application. You do not have to rush or worry about re-application after the products are dried up.
Another tip is to choose a cementitious bonding agent that can be applied both to concrete and steel surfaces because it can save you time and cost. After applying this bonding agent, you can proceed to applying the concrete repair product. The cementitious bonding agent must be applied to the whole circumference of the steel reinforcement bars and the concrete surface behind these bars.
A concrete repair product is used to replace the removed cracked concrete. If budget is limited, new concrete can be used instead. But it is not advisable because the end result is only for short term only.
The market is flooded but not yet saturated with various products to make the new concrete or concrete repair material stick well onto the parent concrete and steel reinforcement bars. One good tip is to choose a cementitious bonding product or agent. Such products do not have any time limitation in application. You do not have to rush or worry about re-application after the products are dried up.
Another tip is to choose a cementitious bonding agent that can be applied both to concrete and steel surfaces because it can save you time and cost. After applying this bonding agent, you can proceed to applying the concrete repair product. The cementitious bonding agent must be applied to the whole circumference of the steel reinforcement bars and the concrete surface behind these bars.
A concrete repair product is used to replace the removed cracked concrete. If budget is limited, new concrete can be used instead. But it is not advisable because the end result is only for short term only.
Get Good Tips in Concrete Surface Preparation Including Steel Surface
Hi everyone! I just can't wait to share the next tip on getting long term results of concrete roof repairs! This tip is useful in repair of concrete roof that is damaged by corrosion of steel reinforcement bars.
The key is to prevent water leakage i.e. no water seepage in concrete roof. First, you need to remove all loose cracked concrete from the underside of the concrete roof slab. Remove them until reaching the hard good concrete including those behind the steel reinforcement bars.
Then clean the steel reinforcement bars from rust until they become bright. It can be done using a wire-brush or using mechanical tools. Take note to clean the whole circumference of the steel reinforcement bars. But if the cleaned bars have lost more than 10% of the cross-sectional area of bars, it is better to replace with new steel reinforcement bars.
Lapping of new steel reinforcement bars with existing steel reinforcement bars is a better choice than welding. Welding uses heat and may cause fire if not done according to good standard practice.
After that, clean the parent concrete and steel reinforcement bars from dirt and all debris using high pressure water jet. Now the concrete and steel reinforcement bars are ready to receive the next treatment in concrete roof repairs.
The key is to prevent water leakage i.e. no water seepage in concrete roof. First, you need to remove all loose cracked concrete from the underside of the concrete roof slab. Remove them until reaching the hard good concrete including those behind the steel reinforcement bars.
Then clean the steel reinforcement bars from rust until they become bright. It can be done using a wire-brush or using mechanical tools. Take note to clean the whole circumference of the steel reinforcement bars. But if the cleaned bars have lost more than 10% of the cross-sectional area of bars, it is better to replace with new steel reinforcement bars.
Lapping of new steel reinforcement bars with existing steel reinforcement bars is a better choice than welding. Welding uses heat and may cause fire if not done according to good standard practice.
After that, clean the parent concrete and steel reinforcement bars from dirt and all debris using high pressure water jet. Now the concrete and steel reinforcement bars are ready to receive the next treatment in concrete roof repairs.
Monday, November 15, 2010
What Is The Importance Of Roof Leaks Repairs?
Roof leaks repairs are usually done mainly to prevent water leakages on the roof and can enter your house or building. Roofing materials can be in small pieces or sheets. When put together to form the roof for your house, gaps between the pieces or sheets can formed over years after being exposed to the changing weather.
Concrete roof casted monolithically on site does not have the problem of gaps on its surface. Instead, concrete roof has voids when it hardens. These voids are one of the sources of water leakage inside your house or building. It also contributes to concrete cracks due to corrosion of steel reinforcement bars.
So, one of the steps in concrete roof repairs is to inspect for water leakage marks on the ceiling or underside of your concrete roof slab. Water leakage often happens on concrete flat roof. A concrete flat roof can cause ponding of rain water because there is no gradient on such roof to allow fast removal of water to the drains.
After carrying out any concrete roof repairs, you must conduct roof leaks repairs. This is to ensure the concrete roof repair will last longer and to prevent rain water leakage. However there are many types of roof leaks repairs that depend on the type of roof construction. So look out for my new post on this topic.
Concrete roof casted monolithically on site does not have the problem of gaps on its surface. Instead, concrete roof has voids when it hardens. These voids are one of the sources of water leakage inside your house or building. It also contributes to concrete cracks due to corrosion of steel reinforcement bars.
So, one of the steps in concrete roof repairs is to inspect for water leakage marks on the ceiling or underside of your concrete roof slab. Water leakage often happens on concrete flat roof. A concrete flat roof can cause ponding of rain water because there is no gradient on such roof to allow fast removal of water to the drains.
After carrying out any concrete roof repairs, you must conduct roof leaks repairs. This is to ensure the concrete roof repair will last longer and to prevent rain water leakage. However there are many types of roof leaks repairs that depend on the type of roof construction. So look out for my new post on this topic.
Why Do You Need To Carry Out Concrete Roof Repairs?
Not many of you are aware of the steps involved in concrete roof repairs, right? Here I just want to share the tips on this area so that fellow houseowners can decide on the best remedial measure for their concrete roof.
A concrete roof is constructed using concrete and reinforced with steel reinforcement bars so that the roof can carry all the load on it. In reality, concrete is porous with many voids. The sizes of the voids depend on the how dense the concrete is. The naked eye cannot see the voids but water can seep into concrete through these voids.
Water inside the concrete can get in contact with the steel reinforcement bars and help start corrosion. When rust is formed on the steel reinforcement bars, the concrete will crack and fall off. Normally the concrete at the bottom surface of the roof will start first to crack and fall down.
It can be dangerous if the cracked concrete fall down and hit you and your family. Not only that, water seeping inside your house can damage your eletrical fittings. That is why you must carry out a concrete roof repair that is economical and effective.
A concrete roof is constructed using concrete and reinforced with steel reinforcement bars so that the roof can carry all the load on it. In reality, concrete is porous with many voids. The sizes of the voids depend on the how dense the concrete is. The naked eye cannot see the voids but water can seep into concrete through these voids.
Water inside the concrete can get in contact with the steel reinforcement bars and help start corrosion. When rust is formed on the steel reinforcement bars, the concrete will crack and fall off. Normally the concrete at the bottom surface of the roof will start first to crack and fall down.
It can be dangerous if the cracked concrete fall down and hit you and your family. Not only that, water seeping inside your house can damage your eletrical fittings. That is why you must carry out a concrete roof repair that is economical and effective.
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