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- W2952889912 abstract "A new biomimetic strategy to im prove the self-healing properties of Portland cement is presented that is based on the application of the biogenic inorganic polymer polyphosphate (polyP), which is used as a cement admixture. The data show that synthetic linear polyp, with an average chain length of 40, as well as natural long-chain polyP isolated from soil bacteria, has the ability to support self-healing of this construction material. Furthermore, polyP, used as a water-soluble Na-salt, is subject to Na+/Ca2+ exchange by the Ca2+ from the cement, resulting in the formation of a water-rich coacervate when added to the cement surface, especially to the surface of bacteria-containing cement/concrete samples. The addition of polyP in low concentrations (<1% on weight basis for the solids) not only accelerated the hardening of cement/concrete but also the healing of microcracks present in the material. The results suggest that long-chain polyP is a promising additive that increases the self-healing capacity of cement by mimicking a bacteria-mediated natural mechanism." @default.
- W2952889912 created "2019-06-27" @default.
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- W2952889912 date "2019-06-17" @default.
- W2952889912 modified "2023-10-13" @default.
- W2952889912 title "Transformation of Construction Cement to a Self-Healing Hybrid Binder" @default.
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- W2952889912 doi "https://doi.org/10.3390/ijms20122948" @default.
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