Synthesis and properties of a novel clay-resistant polycarboxylic superplasticizer
Chloro-propylene terminated fatty alcohol polyoxyethylene ether(AC-AEO9)is a polymerizable surfactant with signifi-cant steric hindrance.A novel anti-clay polycarboxylate polycarboxylic acid superplasticizer(A-PCE)was prepared using AC-AEO9 as functional monomer.The effect of functional monomer dosage on the dispersion and clay resistance of A-PCE was investigated,and the clay resistance mechanism of A-PCE was revealed using X-ray diffraction and specific surface area and pore size analyz-er.The results showed that under the conditions of 0.23％water reducer dosage and the molar ratio of functional monomer to su-perplasticizer macromonomer of 1∶5,the initial and 120 minute flowability of cement slurry mixed with A-PCE were 275 and 270 mm,and the polycarboxylic acid superplasticizer exhibited excellent dispersion performance and mud resistance performance.Due to the introduction of anti-clay functional monomers,polycarboxylate water reducer has good dispersion and less adsorption on clay,making it more adaptable to clay.
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