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Polycarboxylate superplasticizers (PCEs) present a class of cement dispersants which exhibit a comb or brush-like structure. They consist of a trunk chain holding carboxylate groups and of pendant chains which are made of polyethylene or polyethylene/polypropylene glycols. Since their invention in 1981, several types of PCE products have been introduced and are manufactured commercially. The PCE products include: 1 MPEG ¨C type PCEs 2 APEG ¨C type PCEs 3 HPEG-type PCEs 4. IPEG ¨C type PCEs 5. PAAM ¨C type PCEs and so on... |
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