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Autoclaved aerated concrete brick failure: Due to unfamiliar markets
It is easy to see that, unfired building materials, especially bricks aerated concrete (AAC) has many superior features compared to conventional clay bricks.

That is : lightweight , sound- insulated , fire resistant , large and small error help quick construction , saving materials and energy construction , production process , unburned fuel , in the process less construction waste generated during use and help save energy for buildings , help protect the environment ... in short, with many outstanding features , high prices are not clear , the advantages of AAC brick is undeniable .
 
Many advantages , but brick ACC has not appeared in the market . Currently, no plant produces in excess of 50 % of design capacity . Does the market are new , unfamiliar people ?
 
After some products of plant introduction , exhibitions , displays, product applications have been deployed , many investors and builders exuberance , determination and trust put bricks AAC into use in the works.
 
However, what they do they can not get the peace of mind , each of the AAC brick production per unit only adapt to some kind of work . Even the same kind of work , but the same quality brick used in the southern region is not a problem but used the wrong north . Thus, when using AAC bricks , each owner or contractor to find other " kind " match . Will they have enough patience , enough time to do this , when the markets are abound bricks that they used .
 
The second annoyance that users encounter AAC brick is brick " cocoon " accompanying accessories . AAC brick building with cement can not common on the market that needs a suitable mortar .
 
Thus, when using AAC brick , not only to choose but to choose tile grout , not to mention , mortar suitable for construction is unlikely to warrant appropriate .
 
A further problem is the use of AAC brick depends on building design . In other words , design ideas must include conditions of use AAC brick . In fact , the majority investor , design consultant , not know or do not have the habit of using AAC brick , the design should not put into use AAC brick .
 
With the design works , designed to change the switch to not simply whether AAC brick tiles have many advantages as mentioned above , especially with the work that the investor is the state organization .
 
"We are not so foolish as to which design changes " , a building contractor confirmed and further explained : known to reduce the price , but we know better explain how to change the inspection of materials , unit cost of construction. So , not specified , we will follow what has approved that do .
 
Many architects though very " excited " with technology , new materials , but the design calculations for a building , a building , an apartment complex , they still have to choose a safe solution with traditional building materials unless the investor requests .
 
When selecting technology , manufacturers usually concrete materials technology from other countries such as Germany , Thailand , China , but little attention that climatic conditions unlike their Vietnam . Natural quality AAC brick TCVN satisfactory but the problem is compatibility between AAC brick and other materials in the building.
 
Obviously , AAC brick faced many obstacles are in the process assert themselves on the market . However, Vietnam with premium features , these tiles deserves widespread use . Just manufacturers perseverance and ingenuity to find suitable ways to go , doors will be revealed for AAC brick .
 
As an example , brick - block V of Hai Vuong Co. ( Dong Nai ) was used as the main building material in the walls of the Tower DB - TP . HCM ( DB Tower is one of the office buildings , luxury apartments in Vietnam was first designed and constructed according to LEED standards of the U.S. technology ) .
 
Ceramic tiles AAC is being produced by the method of " in tune - optimum " of chemical reactions between minerals : SiO2 ( sand ) , CaO ( lime ) , Al ( aluminum powder produce H2 gas ) , H2O ( hydrate water reaction ) and a binder ( cement ) . After the mixing process , created bubbles and recuperate the east , tiles are cut and put into the oven members autoclaved with high temperature and pressure to promote the chemical reaction process . After 1 day , brick oven containing most of the CSH crystals which are mainly distributed evenly Tobemorite crystal structure brick tiles make durable and lightweight .
 
(ĐTCK)
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