Mesocrystalline calcium silicate hydrate: A bioinspired route toward elastic concrete materials

Picker, Andreas; Nicoleau, Luc; Burghard, Zaklina; Bill, Joachim; Zlotnikov, Igor; Labbez, Christophe; Nonat, André; Cölfen, Helmut

doi:10.1126/sciadv.1701216

Cited by 100 publications

(65 citation statements)

References 45 publications

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“…Without retaining their original nano‐size, the acceleration effect on cement hydration is limited due to the lower surface area. Recently, co‐precipitation of inorganic/organic nanocomposites has been reported and become a more effective approach to solving the problem of agglomeration . Sun et al explored the effects of C‐S‐H/PCE nanocomposites on early cement hydration .…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, among all nanoparticles reported, nano-C-S-H is found to be more effective for the formation of C-S-H product than the other nanomaterials such as SiO 2 , TiO 2 , Al 2 O 3 , due to the huge surface area and the lower interfacial energy between the nanoparticles and the hydration product C-S-H. 26,27 A large variety of methods have been used for the synthesis of nano-C-S-H, including the typical top-town process, the sol-gel process, the pozzolanic method, and the co-precipitation of aqueous solutions of sodium silicate and calcium nitrate in polymer stabilizers solution. 23,[28][29][30][31][32][33][34][35][36] The typical top-down process is the grinding of synthetic, macroscopic C-S-H material to nanoparticle size. The C-S-H is either produced by the hydration of pure alite or by the hydrothermal reaction of silicates and lime.…”

Section: Introductionmentioning

confidence: 99%

“…The C-S-H is either produced by the hydration of pure alite or by the hydrothermal reaction of silicates and lime. [28][29][30][31][32][33][34][35][36] The sol-gel process offers the opportunity for synthesis of C-S-H seeds by gel formation of calciumethoxide and tetraethylorthosilicate (TEOS). 31,35 The C-S-H with different compositions can also be obtained by pozzolanic method.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, co-precipitation of inorganic/organic nanocomposites has been reported and become a more effective approach to solving the problem of agglomeration. 19,25,[36][37][38][39] Sun et al explored the effects of C-S-H/ PCE nanocomposites on early cement hydration. 19 Plank et al have studied effect of different pH on the structure, composition and morphology of C-S-H-PCE nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

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The effects of nano‐C‐S‐H with different polymer stabilizers on early cement hydration

et al. 2019

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A promising approach to accelerate cement hydration known as “seeding technology” has been discovered using nano‐particles to provide additional nucleation sites for growing of C‐S‐H. Two different types of polymer, polycarboxylate (PCE) and polysulfonate (PSE) were used as stabilizer to synthesize nano‐C‐S‐H via co‐precipitation process. The obtained C‐S‐H‐polymer composites were characterized by means of XRD, FTIR, thermogravimetric analysis (TGA), TEM, dynamic laser scattering (DLS), and BET. DLS measurement shows that the particle size of the obtained C‐S‐H‐polymer suspension ranges from 82.6 to 589.9 nm. The results of DLS and BET show that the particle size of the C‐S‐H particles synthesized using PCE polymer as stabilizer is smaller than those synthesized with PSE polymer, and hence the specific surface area is much higher. FTIR and TGA results confirm the presence of the polymers in the obtained C‐S‐H composites particles. XRD results indicate that the presence of the polymers reduces the crystallinity of C‐S‐H due to the absence of the d002 peak at 2θ of 7°. The calorimetry results show that the main hydration peak of cement is dramatically increased by the addition of the C‐S‐H‐polymer composites. It is interestingly found that the acceleration effect of the C‐S‐H‐polymer composites is linearly proportional to the total surface area of the nanoparticles introduced into the cement pastes. At the same time, it is found that the secondary hydration peak, usually known as the sulfate‐depletion peak, is greatly advanced by addition of the C‐S‐H nano‐particles in comparison with the blank cement paste. The acceleration effect of the nano‐C‐S‐H is further verified in a pure C3S system.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The effects of nano‐C‐S‐H with different polymer stabilizers on early cement hydration

et al. 2019

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“…As reported, the primary cement hydration products are C–S–H and C–A–S–H gels . In addition, many works found that C–A–S–H gels could effectively increase both average chain length and toughness of C–S–H gels . Interestingly, the pozzolanic reaction of LWFA dissolved large amounts of Al 3+ ions, which made it necessary to determine whether the Al 3+ ions could participate in cement hydration to modify the C–S–H gels.…”

Section: Resultsmentioning

confidence: 98%

Heat‐cured concrete: Improving the early strength and pore structure by activating aluminosilicate internal curing agent with triisopropanolamine

Liu

et al. 2019

J Am Ceram Soc

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Although heat‐cured concrete (HCC) has received extensive research interests in recent years, it still suffers from problems including coarsened microstructure, low cement hydration degrees, etc, which limited its application. Some of these problems can be solved by internal curing method resulting in low early strength of HCC and low‐production efficiency. This study addressed this issue by activating the aluminosilicate internal curing agent (lightweight fine aggregate, LWFA) with triisopropanolamine (TIPA). The results indicated that more Al3+ and Fe3+ ions were dissolved from LWFA by TIPA, which assisted the formation of hydrates with cement ions in interfacial transition zone (ITZ), and enhanced the density of ITZ in the early stage. The introduction of TIPA was found to increase the early compressive strength of HCC, by approximately 15.3%, 25.9% and 28.0%, respectively for the cement cured for 1, 3, and 7 days compared with control samples. Moreover, the results of rapid chloride migration and water absorption depth also suggested that coupling the aluminosilicate internal curing agent with TIPA improved the pore structure of HCC.

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High Energy Absorption Nacre‐Like Calcium Silicate Hydrate (C‐S‐H) Composite Toward Elastic Cementitious Materials

Liu,

Feng,

Agudo

et al. 2023

Adv Funct Materials

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The low toughness under the tension of cement and concrete materials has been a long‐standing issue for decades and it has become increasingly urgent to address in modern society due to the growing demand for the development of high‐performance and sustainable constructions. Manipulating calcium silicate hydrate (C‐S‐H), the main hydration product of Portland cement, which determines the mechanical properties of cementitious materials, is an attractive method for improving their toughness following a bottom‐up approach. Inspired by the microstructure of nacre, a high energy absorption C‐S‐H‐based composite with a highly ordered structure is fabricated by a designed ternary building block, in which exfoliated montmorillonite provides a template for the nucleation and growth of C‐S‐H generating the “brick”, and polyvinyl alcohol acts as a “mortar” binding all the building blocks together. With the hierarchical toughening strategy explored here, the obtained C‐S‐H composite achieves a remarkable energy absorption of 16.2 ± 2.6 MJ m−3, which surprisingly outperforms the ultra‐high toughness cementitious materials by a factor of 20–60 and is even higher than that of natural nacre and other nacre‐like composites. These findings not only provide valuable insights into enhancing the toughness of cementitious materials but also open possibilities for broadening potential applications of C‐S‐H.

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Mesocrystalline calcium silicate hydrate: A bioinspired route toward elastic concrete materials

Abstract: Controlled aggregation of polymer-stabilized calcium silicate hydrate nanoparticles leads to elastic cementitious materials.

Cited by 100 publications

References 45 publications

The effects of nano‐C‐S‐H with different polymer stabilizers on early cement hydration

The effects of nano‐C‐S‐H with different polymer stabilizers on early cement hydration

Heat‐cured concrete: Improving the early strength and pore structure by activating aluminosilicate internal curing agent with triisopropanolamine

High Energy Absorption Nacre‐Like Calcium Silicate Hydrate (C‐S‐H) Composite Toward Elastic Cementitious Materials

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