Road American
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Surface chemistry affects how quickly droplets are attracted to the aggregate and how the emulsion destabilizes at the interface. Anionic emulsions carry negative charge, so interaction depends on the mineral surface charge, the presence of calcium or other ions, and the pH environment. Dust, clays, and water hardness can shift ionic strength and accelerate or delay breaking. Stability in storage depends on maintaining electrostatic repulsion between droplets, so contamination or pH drift can cause coagulation. That is why water quality control, pH monitoring, and aggregate compatibility testing are essential for predictable break behavior.
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