Modification mechanism of calcium lignosulfonate on cementing cement.

During this stage, the total signal of cement slurry relaxation exhibits minor fluctuations, and with the addition of calcium lignosulfonate, the total signal of cement slurry relaxation shows a decreasing trend.

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Simultaneously, the diffraction peak intensity of C 3 S significantly increases, and the diffraction peak intensity of ettringite also shows an increasing trend.

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