Building House In Mexico

[gringo]

Is anybody familiar with the concrete additive (white powder) called 'cal' ?

It is used extensively for building construction in Mexico.  I would really like to know what is it's purpose and if a necesity when mixing concrete.

Paul

[andeehunt]

Hello paul, I can help you with the mixer of it. Below are the step describe about the mixer.

*   Place the proper amount of dry cement into the dry mixer.
*   Calculate the amount of CEM 300 admixture per weight of dry cement and have it available for adding to the mix.
*   Make sure the mixer is clean and dry.
*  Use a high intensity mixer or ready mix truck.
*  Add the proper amount of total admixture CEM 300 and mix until thoroughly mixed for minimum of five minutes.
*  Add proper amounts of sand and aggregate.
*  Mix for 3 minutes – dry.
*  Have available water in pre-determined volumes in accordance with batch mix design.
*  Add pre-determined water amount at job site, mixing at a slow rate until mix is smooth and consistent.
*  Test and adjust slump if desired or specified.

[Rimi]

I don't know much about it but I heard that it is very good for construction