Concrete Raising Methods

Polyurethane concrete raising and mudjacking are two popular methods used to raise and support sunken or unstable concrete slabs by drilling holes and pumping material underneath.
Polyurethane concrete raising involves using a lightweight, hydrophobic foam to lift concrete back into place without adding significant weight onto the soil.
Pros:
- Lightweight and potentially scalable to demand.
- Less dependent on environment (hills/mountains).
- Can be more compact.
Cons:
- More costly compared to alternatives like pumped water storage.
- More error-prone and tedious.
- Lack of proven technology and potential for higher maintenance.
mudjacking involves leveling concrete slabs by pumping a mud/concrete mixture into drilled holes but may not provide a lasting solution and can be prone to sinking again.

Concrete Raising Using Blocks

Abstract Concept: A proposal to use concrete blocks in a tower to store energy through gravitational potential energy.
Criticism:
- Expensive, high maintenance, energy inefficient, unreliable.
- Impossible to guarantee accuracy in block placement, posing a hazardous risk.
- Dubious ROI, debunked in the past.
Discussion:
- Potential Benefits: No far-fetched technology or materials, software could be relatively simple.
- Challenges: Gravity potential energy efficiency compared to other storage methods like batteries.
Comparison:
- Efficiency: Much less efficient compared to battery storage and other technology.

Environmental Impact: Concerns about the environmental friendliness and sustainability of using concrete raising methods, especially in terms of potential erosion issues and long-term effects.
DIY Attempts: Anecdotes of DIY attempts using expanding foam for concrete repair, highlighting both successes and failures.
Observations: Amusing and interesting observations on various Reddit discussions related to concrete raising methods, including concerns about safety, effectiveness, cost comparisons, and environmental impacts.