Polycarboxylate superplasticizers (PCEs) overcome key limitations of traditional superplasticizers. Older types rely on electrostatic repulsion, which fades quickly and causes rapid slump loss.
PCEs use a "comb-shaped" polymer structure that provides strong steric hindrance. This creates a physical barrier between cement particles, resulting in superior, longer-lasting dispersion.
This mechanism enables critical benefits: prolonged workability for modern construction needs and high water reduction for stronger, more durable concrete. PCEs are therefore essential for advanced concrete technology.

Synthetic fibers are added to concrete to counteract its inherent flaws: low tensile strength and brittleness. These properties cause concrete to crack easily under stress and shrinkage.
The randomly distributed fibers create a microscopic network that performs two key functions:
Controls Cracking: They bridge across micro-cracks that form during plastic shrinkage and under load, preventing them from widening.
Increases Toughness: They hold the matrix together after cracking, forcing fibers to pull out instead of allowing brittle failure. This greatly improves impact and shock resistance.
Primarily, synthetic fibers enhance concrete's toughness and control plastic shrinkage, complementing the primary tensile strength provided by steel rebar to create a superior, more durable composite material.

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