Impact of quantity of anhydrite, water to binder ratio, fineness on kinetics and phase assemblage of belite-ye'elimite-ferrite cement

Morin, Vincent; Termkhajornkit, Pipat; Huet, Bruno; Pham, Gerard

doi:10.1016/j.cemconres.2017.04.014

Cited by 81 publications

(66 citation statements)

References 12 publications

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“…From the formation process of hydration products, AFt formed in a large amount in both cements hydration at 1 day, while C 4 A 3 S and CaSO 4 were consumed in large quantities. The diffraction peaks of C 4 A 3 S tended to be stable at 3 days and still existed at 28 days, and the diffraction peaks of β-C 2 S did not change significantly during the whole process, indicating that the hydration of C 4 A 3 S begins rapidly in the early stage, while the hydration of β-C 2 S is relatively slow, which is consistent with the viewpoint of [35,36].…”

Section: Effect Of Caso 4 Type On Hydration Productssupporting

confidence: 74%

“…There is little difference in the compressive strength between the two cement pastes during 1 to 3 days. Since 7 days, the compressive strength of GF-HBSAC cement pastes continuously increased, while that of WS-GF-HBSAC-DG cement pastes showed a decrease in strength, which may be caused by the expansion and cracking of the cement pastes, as shown in Figure 14, and similar results have been found in [35], indicating that DG is likely to exceed the optimal content of gypsum. From this point of view, residual CaSO 4 can completely replace DG to participate in hydration reaction.…”

Section: Effect Of Caso 4 Type On Mechanical Strengthsupporting

confidence: 66%

“…According to the hydration reaction of Equations (1) and (2), the AH 3 content is supposed to increase with the increase of AFt or AFm content, but now the decrease of AH 3 content with the increase of AFt content means that AH 3 may be further hydrated and consumed. The hydration reaction of Equation (6) has been mentioned in [35][36][37]. Now, the increase of AFm or C 2 ASH 8 content with the decrease of AH 3 content further confirms the possibility of this hydration reaction.…”

Section: Effect Of Caso 4 Type On Hydration Productsmentioning

confidence: 61%

“…It is well known that the effect of CaSO 4 content on the water requirement of normal consistency and setting time is related to the hydration of C 4 A 3 S and the formation of AFt. With the increase of CaSO 4 content, the hydration speed of C 4 A 3 S is accelerated [35,38], and the formation of AFt is also accelerated, which leads to the reduction of water demand and shortening of setting time. However, excessive CaSO 4 content may cause the formation of AFt too fast and too much so that AFt wraps on the surface of clinker mineral particles and affects the hydration reaction to continue, which results in the reverse change of increasing water demand and prolonging setting time.…”

Section: Effect Of Caso 4 Content On Water Requirement Of Normal Consmentioning

confidence: 99%

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Effect of Residual CaSO4 in Clinker on Properties of High Belite Sulfoaluminate Cement Based on Solid Wastes

Guo

et al. 2020

Materials

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The high belite sulfoaluminate cement (HBSAC) containing CaSO4, and without CaSO4, based on solid wastes were successfully prepared from petroleum coke desulfurization slag (PCDS), fly ash (FA), carbide slag (CS), and bauxite (BX). The mineral composition of clinkers after different calcination history were investigated by X-ray fluorescence (XRF), X-ray diffraction (XRD)/Quantitative X-ray diffraction (QXRD), and scanning electron microscopy (SEM), so as to determine the calcination temperatures. The difference between residual CaSO4 and dihydrate gypsum (DG) and the optimal content of residual CaSO4 were discussed by studying the properties of HBSAC. The results revealed that the residual CaSO4 in clinker could replace DG to participate in hydration, and showed some advantages in strength and early hydration heat, but meanwhile increased the water requirement of normal consistency and hydration heat at 72 h, and prolonged the setting time. With the increase of residual CaSO4 content in clinker, the lower limit temperature of clinker formation gradually increased, and the crystal size of clinker minerals became finer and the boundary between crystals became more blurred. However, the optimal calcination temperature (1300 °C) of HBSAC clinker did not change. Considering the effect of residual CaSO4 content on the water requirement of normal consistency, setting time, hydration heat, strength, and hydration products, the optimal design content of residual CaSO4 in HBSAC clinker based on solid wastes, such as PCDS and FA, was 15%.

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Section: Effect Of Caso 4 Type On Hydration Productssupporting

confidence: 74%

Section: Effect Of Caso 4 Type On Mechanical Strengthsupporting

confidence: 66%

Section: Effect Of Caso 4 Type On Hydration Productsmentioning

confidence: 61%

Section: Effect Of Caso 4 Content On Water Requirement Of Normal Consmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Residual CaSO4 in Clinker on Properties of High Belite Sulfoaluminate Cement Based on Solid Wastes

Guo

et al. 2020

Materials

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“…The process of hydration of cement and subsequent procedures are explained as follows. Clinker, which is the main component of cement used in porcelain insulators, comprises Alite, Belite, Aluminate, and Ferrite [19,20]. Alite and Belite hydrate to produce C-S-H gels and Ca(OH) 2 [21].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Cement Deterioration in Outdoor High-Voltage Insulator

et al. 2019

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Suspension type porcelain insulators used in overhead transmission lines comprise metal, ceramic, and cement. The deterioration of cement can lead to mechanical separation. For the degradation analysis, varied sizes of pores ranging from a few µm (capillary pores) to tens to hundreds of mm (detectable by naked eyes) were considered. Cracks that were hard to view with naked eyes were identified by staining with a fuchsine solution. The hydrogen ion concentration and pH value indicate the extent to which the cement is deteriorated. The longer the cement is used, the lower its pH value. High mechanical strength is considered an important advantage of porcelain insulators, and it may decline, if the cement is used for a longer period of time. Water ingress may also occur, resulting in expansion, due to the rehydration of the cement. The process and mechanism of expansion of cement, due to infiltration of water were described. As a method of analysis, a universal indicator was employed to evaluate the pH changes in cement. It was observed that the pH value was 12-13 for new products. However, for products that were used for 52 years, the pH value was under 7, which indicated an acidic tendency, due to deterioration.

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The Influence of Gypsum Content on the Hydration and Properties of Belite-Ye’elimite-Ferrite (BYF) Clinker

Sabbah

Zhutovsky

2023

RILEM Bookseries

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Impact of quantity of anhydrite, water to binder ratio, fineness on kinetics and phase assemblage of belite-ye'elimite-ferrite cement

Cited by 81 publications

References 12 publications

Effect of Residual CaSO4 in Clinker on Properties of High Belite Sulfoaluminate Cement Based on Solid Wastes

Effect of Residual CaSO4 in Clinker on Properties of High Belite Sulfoaluminate Cement Based on Solid Wastes

Analysis of Cement Deterioration in Outdoor High-Voltage Insulator

The Influence of Gypsum Content on the Hydration and Properties of Belite-Ye’elimite-Ferrite (BYF) Clinker

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