Many walls of old buildings have been damaged and repaired in the wrong way. In the repair of old buildings must use the same techniques and materials. It is important for owners, designers and contractors understand the best way to preserve the heritage of our historic old buildings.
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When limestone is heated over 90 degrees celsius limestone is chemically transformed into quicklime and with the addition of water into hydrated lime or lime life. This material will then be chemically changed again when mixed with plenty of water, will bind every particle of sand or a similar aggregate, this is almost the same as the workings of cement. Limestone is one of the binder is more flexible and softer than cement and building materials have become effective for more than 4000 years.
No new cement around the last 200 years and is available in Indonesia for wall construction house building since 1975. So every home and building built before 1975 may be built using a “limestone”
Limestone mixed with fine sand, and bricks or tiles were destroyed to make masonry or plaster as well, after it was used as acian to get the smooth white plaster above. Limestone is also used as a white or light color paint called lime wash.
Benefits of limestone is more flexible and crack resistant shrinkage of movement on the wall. If the cracks are formed from structural movement they will also “Self Heal” or connect by itself from time to time with the aid of water circulation.
Negatives of limestone is that they take a long time to harden and they can become soft and crumble if exposed to water continuously. The walls should be kept well typically repainted every year with lime wash.
There are many examples of quaint old buildings of more than 2000 years in Egypt and the cities Romaiwi until a long time they were still in good condition today which shows sufficient strength by limestone on the building.
In the care and maintenance of the walls of the old building historic building owners and designers can use the limestone and brick were crushed, and should be the same as the original building, it may not be practical to share cases. The alternative is to use a premixed mortar which use addictive lime, cement, and other chemicals to provide flexibility and bonding that is needed to repair the old walls.
Using a mixture of cement and sand or acian ordinary cement will only cause cracks and will not bind well with the old sand cement mixture attached to the wall. Ordinary sand plaster cement and cement acian too rigid dank eras, will cause the wall to crack. Poor sand quality available in Indonesia will pose in the future ,.
TR30 acian White is a mixture of cement and lime added to the polymer additives to create a more flexible and a good bond. This product is the best option that is similar to the old limestone materials for the repair of old buildings, while for repairing masonry and plaster, can use a mix of acian TR30 White with 40% of fine clean sand or crushed brick. When it is necessary to better water resistance we recommend adding 2% acrylic latex bonding agent or white glue. Indocement will produce plaster and masonry made of limestone called TR20 will be available in late 2012. This product will be suitable for the repair of old buildings and old-fashioned.
The best way before repairing cracked or damaged acian is a check in advance of the reasons why the wall was broken. If cracks arising out of structural movement, we need a material to strengthen the foundation or make grout or cracks between the wall of the column or beam structure that is filled with materials that are more flexible
If damage is caused by roof leaks, window then they have to fix first. If the problem is from the high humidity due to rising ground water, must be made more additional drainage it is necessary to keep the walls dry.
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Use a high-quality acrylic paint that will allow the walls to breathe and allows the water to evaporate from the wall. Lime wash paint comes from parents who may be too soft and dusty it is cleaned first and tied with acrylic sealer before painting. Acrylic paint is perfect with acian containing chalk and will protect the wall for 5-10 years.
Indonesia has many historic old buildings that are in poor condition maintained. We should all keep well and appreciate the history of weeks to generassi future. The Romans have maintained their buildings for thousands of years. With a few tips and how to care for old fashioned proper building our history can also be preserved.