Effect of polymer on morphology and structure of calcium silicate hydrate prepared via precipitation method

Lü, Linnü; Ping, Bing; He, Yongjia; He, Liu; Wu, Xi; Hu, Shuguang

doi:10.1007/s11595-014-0948-x

Cited by 8 publications

(1 citation statement)

References 5 publications

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“…Through the use of bottom-up nanotechnology, the nanostructure of C-S-H has been modified and the healing of defects has been critical to the improvement in performance. The synthesis method of "polymer-inserting C-S-H" [29] and "polymer binding C-S-H" [23] are usually adopted to obtain different nanostructures of C-S-H. For example, polyvinyl alcohol (PVA), polyethylene glycol (PEG), polyaniline, polyacrylic acid and hydroxylterminated polydimethylsiloxane (PDMS) have been used to prepare polymer/C-S-H particles at the nanoscale [30][31][32][33][34][35][36][37][38]. This provides the referable technology to achieve targeted C-S-H with a specific nanostructure.…”

Section: Introductionmentioning

confidence: 99%

Effect of Synthetic Pregelatinized Starch-Modified C-S-H Particles on the Chemical Structure of C-A-S-H Generated from GGBS

Hao,

Zhu

2023

Materials

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Finding new agents to enhance the strength of alkali-activated (ground granulated blast furnace slag) GGBS is beneficial for environmental protection. Here, we reveal the effect of pregelatinized starch-modifying calcium silicate hydrate (C-S-H) particles on the nanostructure tailoring of NaOH-activated GGBS hydrates. The results show that, for the synthetic modified C-S-H, the pregelatinized starch absorbs on the surface of C-S-H, which modifies the silicate chains and crystal structure. Adding pregelatinized starch-modified C-S-H particles can tailor the chemical structure of calcium silicaluminate hydrate (C-A-S-H) formed from GGBS hydration by increasing the mean chain length (MCL) and decreasing the Al/Si ratios. When adding C-S-H particles modified by 0.1% pregelatinized starch, the MCL of C-A-S-H is increased by 344.5% and the Al/Si ratio is decreased by 16.0%. The compressive strength of NaOH-activated GGBS samples can be enhanced by adding pregelatinized starch-modified C-S-H particles, while the addition for modified C-S-H does not significantly affect the flexural strength. The high strength of hardened blocks of hydrated GGBS is related to the long MCL silicate chains. These findings provide a potential application of pregelatinized starch-modifying C-S-H particle acting as strength-enhancing agents.

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