Water is a very important basic ingredient in the manufacture of building materials construction with reinforced concrete structures.
In concrete construction, water needed to react with the cement so it can be adhesive between the fine aggregate (sand), coarse aggregate (gravel) as well as other concrete mix materials
While in steel construction, water washing is used as an ingredient of steel profile kotorran arising from the storage and distribution at the steel.
In the manufacture of concrete construction must be used well water so as to create a strong concrete and durable.
Water is good for reinforced concrete mix should have to meet the following requirements:
* Water must be clean
* May not contain the mud more than 2 grams / liter.
* Does not contain oil sludge and other applied objects that can be seen visually.
* Does not contain salts that can damage the concrete (organic acids) more than 15 grams/liter.
* Does not contain sulfate compound for more than 1 gram / liter.
* Does not contain chloride (cl) more than 0.5 grams / liter.
Water used should be of the type of fresh water because salt water / sea water has high salinity so that it can cause rusting of reinforcing steel and concrete construction is not optimal because the selection has the power of water is wrong at the time of execution.
thus a strong building construction starts from a good selection of water as building materials.