AI summary · arXiv: 1909.06025v1 · cond-mat.soft
Optimal cement paste yield stress for the production of stable cement foams
The essentials
- Production of cement foams with controlled morphology is challenging due to bubble instability during cement setting.
- Traditionally, high yield stress cement paste has been used to promote stability by damping intrinsic bubble kinetics.
- A recent study suggests that fresh foam stability can be achieved by decreasing the yield stress of the cement paste for a given water-to-cement ratio.
- In this low apparent yield stress regime, van der Waals attraction between cement grains is reduced, allowing efficient packing of grains by bubbles and providing enhanced mechanical properties.
- The study was conducted using two distinct additives at controlled concentrations without resorting to set accelerators.
- This finding could have significant implications for industries such as construction and oil drilling where lightweight materials are required for insulation or buoyancy purposes.
- Overall, this study provides valuable insights into the production of stable cement foams and opens up new avenues for research in this field.
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