How to make large amounts of concrete stones or blocks

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How to make large amounts of concrete stones or blocks

Postby Khun Jean » Wed Apr 02, 2008 9:00 pm

I want to experiment with some custom building block designss.
For that i need to make around 500 pieces.
What is the best way to setup a small production line for this.
I am thinking of using chang red cement mixed with sand and fiber and maybe some filler to make it more lightweight.
How long do i have to wait for the concrete to cure enough so it can be taken out of the mold without changing shape.
These blocks will be used for stay in place forms, so they don't need structural strength. That will come from the rebar and filling with concrete.

Before someone says i can better buy these things, whats the fun in that? :)
Khun Jean
 
Posts: 4
Joined: Sun Aug 21, 2005 12:18 am

Postby jazzman » Thu Apr 03, 2008 9:58 am

If you really want to go to the expense and effort of making your own bricks that only cost 3,50 baht, that's up to you, I make my own coping slabs for swimming pools, so this is what you can do:
    1. Make metal or wooden forms that can be bolted together - you will need about ten of these.
    2. Use a fairly dry mix of standard cement (Tiger or TPI), and sand that is mixed with very fine aggregate.
    3. Add a colour pigment if you wish.
    4. Be sure to paint the inside of the forms with releasing grease each time they are used.
    5. Use the tip your concrete vibrator to settle the mixture.
    6. Leave the bricks in the forms for about 4 hours before releasing them.
    7.Allow to cure for several days before using.

Visit this page: http://coolthaihouse.com/cthpics/thumbnails.php?album=31
Go and visit a brickworks yourself and see how it is done.
Let us know how you get on :D
jazzman
 
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Location: Thailand

Postby jazzman » Thu Apr 03, 2008 9:59 am

Deleted - above post accidentally submitted twice.
Jazzman
jazzman
 
Posts: 2161
Joined: Wed Dec 06, 2006 9:11 pm
Location: Thailand

Postby Khun Jean » Tue Apr 08, 2008 2:52 pm

I found a guy that can make a form for me and a few samples.
He has a machine that vibrates and presses the concrete.

It is quite a large machine, and for smaller quantities i would need a hand operated one or a smaller electric or fule driven one. A 100 block a day would be more than sufficient.

Anyone seen these small machines for sale in Thailand? He was a little reluctant to tell me, maybe thinking i am going to compete with him. :)
Khun Jean
 
Posts: 4
Joined: Sun Aug 21, 2005 12:18 am


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