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Concrete need a uniform and compacted base, so as long as that rock is uniform and compacted, you should be fine.
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∙ 12y ago
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Can you make concrete from crushed rock?
I tried making concrete from crushed rock 5/8 minus with small particles included. The troubles I encountered were these: 1. The load of crushed rock did not seem to be mixed evenly enough, so there were some parts that were nearly all chips of rock with no sand. 2. Even in the parts that had a lot of sand, it seemed that once I poured the concrete from my mixer into the forms, there would be parts that had no "soup" to them. When I tried to float the sidewalk with a hand float, I could not tamp the rocks down. They were simply too dry, with the "soup" just going somewhere else. On the other hand, some parts of the pour would finish by hand reasonably well. However, I required a finished surface ... for the entire surface to have a finished look. That was almost impossible. So what did I do? I found some sand and mixed 50/50 with cement and water, and tried to smooth that out over the surface. But it did not work too well, as some areas dried differently, more slowly. And when some was ready to broom, the rest of the little square area was too wet, so the broom just brushed the rocks back up. Yes, I was able to finish that segment of the pour, but by the end of the day my arms ached and I was very discouraged. After that I stopped using crushed rock. I do not plan to use the crushed rock again. I will use the crushed rock for some other type of project, and start all over on the rest of the sidewalk, with smooth rock/aggregate that has the correct mixture of sand and various sizes/particles of material. I might add that I have done numerous small concrete projects in the past. Never had one so difficult in my life. No more crushed rock for me in concrete.
Is concrete harmful?
Wet concrete is caustic- it will burn your skin. Concrete DUST is not good to inhale- it may contain silica. Solid, cured concrete is about as hazardous as a rock.
What concrete is best for pouring a footing?
3000 psi. with 3/4 rock should do it . but you could go higher psi which would be over kill.
How do i make concrete using nature?
Concrete IS nature, the aggregate is crushed rock, the cement is made of natural lime and clay, mix these together with water and you get concrete.
What is Impervious concrete?
A layer of rock or soil that does not allow water to pass through it .
Is it better to pour the concrete for the foundation till it reach the natural rock or it is better to make scaffolding and leave it away from from the rock?
It depends on many factors. Your builder should know the correct manner in which to proceed.
What type of rock is formed on ocean beds?
Sedimentary rocks are formed over existing basaltic rock on ocean beds.
Is asphalt concrete a mineral a rock or neither?
Asphalt concrete is actually niether. I had to do a project on this. It is not a rock nor a mineral.
What kind of rock is concrete?
A concretion is a rock formed from sedimentary processes; therefore, it is a sedimentary rock.
When molten rock squeezes into existing rock it is called?
It's called an intrusion.Depending on just how the igneous rock (molten rock) enters into the existing rock, you can have dikes, sills, plutons and batholiths.
Is concrete a rock?
No. Concrete is a man-made material composed broadly of cement, sand and aggregate (crushed rock).
What is molten rock that squeezes into existing rock and cools?
A plutonic intrusion.Igneous rock.
What type of rock is made of previously existing rock whose formation does not involve high temperature and pressure?
Clastic sedimentary rock is a product of the weathering, erosion, and diagenesis of pre-existing rock.
Gaps in rock layers that develop when agents of erosion remove existing rock layers?
Gaps in rock layers that develop when agents of erosion remove existing rock layers are known as unconformities.
What is best to use on concrete to melt ice?
rock salt is an old standby but has been known to damage the concrete over time. I've been told that the salt used in water softeners does a good job and doesnt harm the concrete.
What Is Small intrusions cutting across existing rock?
Metamorphic rock
What are mettamorphic rock?
A metamorphic rock is a rock that is changed from an already existing form of rock by pressure or temperature
