| 摘要 |
Exemplary compositions comprise a plurality of particles to be dispersed (e.g., calcium carbonate or a binder material such as Portland cement) and a compound for dispersing the plurality of particles. The compounds comprise a residue of a sugar or sugar derivative linked by an amine, amide, imide, or urea group to a non-sugar substituent comprising one or more alkyl, aryl, alkylaryl, oxyalkylene, polyoxalkylene groups, or a mixture thereof. Disclosed are exemplary compounds for dispersing particles and for modifying properties of hydratable compositions, such as cementitious mixtures (e.g., concrete, masonry, mortar, or cement), as well as methods for making the compounds and for modifying particle-containing compositions. The compounds and methods are useful for increasing fluidity, strength, grinding performance, or other properties in cements and cementitious compositions. The invention is also believed to provide one or more of these qualities in aqueous environments wherein particles, such as cement particles, are dispersed (e.g., slurries). |
