HYDRAULIC PRESS VS CONCRETE AND REINFORCED CONCRETE

With the help of a hydraulic press, we will test the strength of concrete and reinforced concrete

[billj]

Your concrete did not have the correct proportions of aggregate to make strong concrete, that's why it crumbled so easily. There is a lot of science that goes into the proportioning of the elements that go into concrete, change the amount of one of the materials and it can have a significant affect on the strength. In addition if you are trying to add reinforcing to strengthen concrete you have to consider what strength you are trying to reinforce for, and the reinforcing configuration not only has to match that but it has to be able to transfer loads from the concrete to the steel. The reinforcing layout in the video is incorrect for reinforcing against compression, and you would have to use much smaller types of reinforcing in order to be able to transfer loads from concrete to reinforcing.

[mattt]

My job this morning is to break apart and remove a reinforced concrete patio. After watching this video, you can imagine why I am not excited :D

[jonb]

I think this is the first hydraulic press video I've seen where the forces being applied are actually relevant to what the material is designed for

[triggerhappy]

But how long did you let the concrete set & dry for??.

[TanveshDabholkar]

It is unsatisfying on so many levels for a civil engineer like me to watch all the blunders made. First of all concrete being mixed wrongly, later no curing provided to the concrete, and reinforced concrete beam subjected to compressive load, whereas we generally test it for flexure.

[tonyhawk]

Roman concrete vs modern concrete would be interesting. The roman concrete uses ash from volcanos so not the easiest to source, and uses much less water. Obviously modern reinforced concrete is much stronger, but for the concrete itself it's still interesting - especially if we want to avoid the reinforced part to avoid rusting and maintenance. Roman concrete will last thousands of years while reinforced concrete will eventually fall apart as it rusts from the inside out.

[ChristianWagner]

You are comparing apples to oranges. The "concrete" mix was apparently not standardized for all three samples. One mix had gravel, while the second mix lacked gravel. The cube also had no gravel. The ratio as well as the water content was not given and may have varied. How was the curing done?

The reinforced vs unreinforced samples should have been tested as beams, for example with two supports at the bottom and one load in the center.

A sand and cement mix is not concrete, but mortar which is much weaker. Your cube only had about 860 psi of compressive strength. The antique concrete cube performed comparatively well with about 2500 psi, which you could have reached easily with modern concrete after 28 days.

[George.Coleman]

Impressive what steel reinforcing does

[chriswentworth]

I'd like to see a test on the concrete used for prison cells. It's more dense then everyday concrete.

[rostislavvladimirov]

Thank U very much for this experience.

[timmusician]

“Don’t repeat at home”??

So, we should NOT use our hydraulic press to do this? I guess I’ll use my hydraulic press for other purposes then 😳🤷🏽‍♂️

[-cesaromaralmeidavea]

In this case the concrete may have more resistance depending of the proportions on ingredients. And results would be more efficient with a cilinder with the same area of hydraulic press

[ekenemadunagu]

Im interested to see the boundaries material strength of buildings tested to the limit 💪

[lucashouston]

Be interesting to see various types of micro rebar like Helix 525 or fiber reinforcement tested this way.

[Paramveer]

Suggestion to everyone - If you gonna do compressive test on concrete, you should consult with a fucking Civil Engineer.

[iminsideyourwalls]

Rectangular specimens should be tested for bending, not compression

[slipperyslope]

Do fibermesh please. Also, mix it properly.

[MrHartless]

That's not concrete. It mortar. Proper concrete is mixed with stones.

[Vip__honey]

We all just appreciate the content this man and his crew makes its just a masterpiece imagine what's he's gonna doing the future 💛....

[nottelling]

@Crazy Hidraulic Press
Another good video; thank you