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  1. chollan2

    Concrete cracks

    Hey, Well, thanks all for enlightening me. I've been surfing around seeing how concrete is made, How it is laid, how it is cured, etc. It peaked my interest when I walked around and look at things. I noticed the driveways and how cracks form if the length is over say 8 or 9 feet. Also, when...
  2. chollan2

    Concrete cracks

    Hi, I suppose shrinkage is responsible, but not exclusively. I believe it is a combination of shrinkage and expansion. >>All of these joints are to control cracking caused by the >>concrete as it cures. The normal thermal expansion of >>concrete does NOT create cracks. Then what is the purpose...
  3. chollan2

    Concrete cracks

    >>Another common joint type is an ISOLATION joint. This >>occurs where features of one type need to be isolated >>from adjacent concrete. An example is a column blockout. I see this occurence when they place a square of some material in the center of a slab of cement. I would have to think the...
  4. chollan2

    Concrete Sidewalk

    Something you should check out is water dranange. I see this as a significant cause of damage. In time, the water softens the soil causing erosion and the softenting of concrete leading to cracks. Other than that, it is pipes or roots beneath the soil. Regards,
  5. chollan2

    Reliable Concrete test

    If you think about concrete, it expands, just like gas. A perfect structure would be a sphere, like a basketball. Well, since we can't design with spheres, there is always a trade-off of a combination of spheres and rectangles and triangles/etc. Where is the pressure being applied? (Concrete...
  6. chollan2

    Concrete cracks

    Hi, While out walking, I looked at cracks. Cracks in driveways, cracks in sidewalks, cracks in pavement, etc. Things I have noticed. 1. No expansion joints on driveways of 8 or more feet. 2. No expansion joints of different materials side by side. 3. No expansion joint on concrete on an angle...

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