Effect of curing time on the hydration and material properties of cold-bonded high-calcium fly ash–Portland cement lightweight aggregate

Narattha, Chalermphan; Chaipanich, Arnon

doi:10.1007/s10973-020-09730-8

Cited by 7 publications

(5 citation statements)

References 34 publications

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“…Interestingly, the thermogravimetric analyses performed on the same samples (Fig. 3) show that the formation of CSH has already started after 24 h from the samples preparation, as shown by the mass loss up to 380 °C, which is due to the decomposition of hydrate phases [37,56,57]. It is worth noting that the amount of CSH is significantly higher after 50 days from samples' preparation.…”

Section: Ft-ir Spectroscopy and Thermogravimetric Analysismentioning

confidence: 78%

The kinetic of calcium silicate hydrate formation from silica and calcium hydroxide nanoparticles

Camerini

Poggi

Ridi

2022

Journal of Colloid and Interface Science

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Section: Ft-ir Spectroscopy and Thermogravimetric Analysismentioning

confidence: 78%

The kinetic of calcium silicate hydrate formation from silica and calcium hydroxide nanoparticles

Camerini

Poggi

Ridi

2022

Journal of Colloid and Interface Science

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“…The silicate-based and carbonate-based coatings are achieved by the hydration of cementitious materials and the biomineralization of bacillus, respectively, on the surface of the concrete substrate, which necessitates a relatively long time to ensure a dense protective layer. The geopolymer-based coatings generally have internal defects such as microcracks and pores due to their volume shrinkage, which can affect the protection of the coating on the substrate. − …”

Section: Introductionmentioning

confidence: 99%

Carbon-Absorbing Inorganic Coating with Ultrahigh Bonding Strength for Concrete: Bonding, Durability Performances, and the Underlying Mechanisms

Huang,

Lei,

Liu

et al. 2024

ACS Sustainable Chem. Eng.

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Inorganic coatings are widely used to protect concrete structures due to their high durability. However, improving the antipenetration performance and bonding strength of these coatings remains a challenge. This study aims to develop an inorganic coating with excellent performances using high-carbonation reactivity γ-dicalcium silicate (γ-C2S) and delve into the underlying mechanisms. This γ-C2S coating exhibits an excellent bonding strength of 5.25 MPa to the concrete substrate by absorbing CO2 and demonstrates great durability, with a bonding strength retention of 90% after 28 days of irradiation. Compared to the noncoated concrete, the capillary water absorption of the coated concrete has decreased by 58%, while the contents of free and total chloride ions in the coated concrete substrate have decreased by 68 and 60%, respectively. Furthermore, the phase assembly and pore structure of the γ-C2S coating were investigated to understand the antipenetration and bonding mechanism. A connecting section was revealed, which positively impacts the bonding strength between the coating and the substrate. This coating-to-substrate interface interaction was further explored to elucidate the underlying mechanisms of the bonding performance of the γ-C2S coating to the concrete substrate.

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“…The main areas of fly ash use are road construction and soil stabilization [ 2 , 3 , 4 ], as well as production of concrete [ 5 ] and geopolymers [ 6 , 7 ]. In concrete production, fly ash can be used as an additive [ 8 , 9 ], as a partial replacement of cement [ 10 , 11 , 12 ], or as coarse aggregate in granular form [ 13 , 14 ]. The chemical composition, physical properties, mineralogical composition, and morphology of fly ash are very important when used in these areas [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Silica Fume on High-Calcium Fly Ash Expansion during Hydration

Barabanshchikov

Usanova

2022

Materials

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The purpose of this work was to study the possibility of neutralizing high-calcium fly ash expansion during hydration. The object of the study was the fly ash of Berezovskaya GRES, which is capable of independent setting and hardening. The test in the Le Chatelier molds showed that the divergence of indicator arms was 90–100 mm 1 day after mixing with water. The expansion and cracking of the fly ash could be completely prevented by silica fume addition in an amount of 42.9% by weight of the fly ash. At the same time, the compressive strength of specimens from the fly ash–sand paste in a ratio of 1:5 at the age of 28 days was 1.47 MPa. The isothermal heat release at a temperature of 20 °C for 10 days reached 500 kJ/kg. XRF and DTA results showed that free lime in the fly ash was completely hydrated in 11 days and gave the greatest expansion in the absence of silica fume. The presence of silica fume made the lime hydration incomplete and decreased the expansion. Unslaked free lime remained in the system. Exothermic data showed that silica fume inhibited CaO hydration from the reaction start.

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Effect of curing time on the hydration and material properties of cold-bonded high-calcium fly ash–Portland cement lightweight aggregate

Cited by 7 publications

References 34 publications

The kinetic of calcium silicate hydrate formation from silica and calcium hydroxide nanoparticles

The kinetic of calcium silicate hydrate formation from silica and calcium hydroxide nanoparticles

Carbon-Absorbing Inorganic Coating with Ultrahigh Bonding Strength for Concrete: Bonding, Durability Performances, and the Underlying Mechanisms

Influence of Silica Fume on High-Calcium Fly Ash Expansion during Hydration

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