Formation mechanism of barium calcium sulfoaluminate mineral

Wang, Shoude; Huang, Yongbo; Gong, Chenchen; Lu, Lingchao; Cheng, Xin

doi:10.1680/adcr.13.00016

Cited by 9 publications

(5 citation statements)

References 17 publications

(12 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The result is in accordance with the X-ray diffraction analysis. At 1000 °C, BaCO 3 decomposes thoroughly (35). Therefore, the vibration band at 1450 cm −1 is mainly attributed to the portlandite carbonation.…”

Section: Ft-ir Spectrum Analysismentioning

confidence: 95%

Formation and early hydration characteristics of C2.75B1.25A3$ in binary system of C2.75B1.25A3$-C2S

et al. 2016

Self Cite

View full text Add to dashboard Cite

C 2.75 B 1.25 A 3 $ (2.75CaO•1.25BaO• 3Al 2 O 3 • SO 3 ) is one of the important minerals and it governdirectly the early-strength of belite-barium calcium sulphoaluminate cement. In this paper a binary system C 2.75 B 1.25 A 3 $-C 2 S is selected to investigate the formation of C 2.75 B 1.25 A 3 $. In the range of 1100 °C-1200 °C, the earlier formed C 2 S hinders the formation of C 2.75 B 1.25 A 3 $. On the contrary, when the temperature is in the range of 1200 °C-1350 °C, the initially formed C 2 S could provide a surface for the nucleation of C 2.75 B 1.25 A 3 $ and cut down the potential barrier (ΔG k* ) for the heterogeneous nucleation of C 2.75 B 1.25 A 3 $, which contributes to its formation. Moreover, at 1350 °C, the large amount of previously formed C 2 S benefits the extent of formation of C 2.75 B 1.25 A 3 $. The possible reason was that it could prevent sulfur evaporation. In early hydration age, AFm and AFt originating from C 2.75 B 1.25 A 3 $ hydration are found within 2 h and 12 h under 95% RH at 1 °C, respectively, whereas C 2 S is unhydrated at this moment. ) es una de las principales fases, y regula directamente la resistencia inicial del cemento. En este trabajo, se ha seleccionado el sistema binario C 2.75 B 1.25 A 3 $-C 2 S para investigar la formación de C 2.75 B 1.25 A 3 $. En el rango de 1100 °C-1200 °C, el C 2 S formado anteriormente impide la formación de C 2.75 B 1.25 A 3 $, mientras que cuando la temperatura está entre 1200 °C-1350 °C, el C 2 S proporcionaría una superficie de nucleación de C 2.75 B 1.25 A 3 $ reduciendo la barrera de potencial (ΔG k* ) para la nucleación heterogénea de C 2.75 B 1.25 A 3 $, lo que contribuye a su formación. Además, a 1350 °C, la gran cantidad de C 2 S for mado beneficia la formación de C 2.75 B 1.25 A 3 $, ya que podía prevenir la evaporación del azufre. En las primeras etapas de la hidratación (entre 2 y 12h y 95% HR a 1 ºC) se pueden encontrar AFM y AFt procedentes de la hidratación de C 2.75 B 1.25 A 3 $, mientras que el C 2 S permanece sin hidratar. KEYWORDS:

show abstract

Section: Ft-ir Spectrum Analysismentioning

confidence: 95%

Formation and early hydration characteristics of C2.75B1.25A3$ in binary system of C2.75B1.25A3$-C2S

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…The hydrating induction period of C 2.75 B 1.25 A 3 $ is much shorter than that of C 4 A 3 S [20]: the hydration of C 2.75 B 1.25 A 3 $ begins to accelerate at 4 h and most of the hydration heat is released at 4-12 h. By contrast, the hydration of C 4 A 3 $ mineral begins to accelerate at 23 h and its hydration heat at 42 h is equal to that of C 2.75 B 1.25 A 3 $ at 12 h. It is thus clear why C 2.75 B 1.25 A 3 $ mineral has the superior performances in terms of early strength and high strength.…”

Section: Introductionmentioning

confidence: 91%

EFFECT OF K₂O AND MgO ON THE FORMATION AND HYDRATION ACTIVITY OF Ba-BEARING CALCIUM SULFOALUMINATE

Shen¹

2016

Ceramics - Silikaty

View full text Add to dashboard Cite

show abstract

“…The strengths of the SMPC8 and SMPC10 pastes cured for 7 days were 17.5 % and 20.2 % higher than PC respectively. It was indicated that sulfur aluminum barium calcium was a new early-strength mineral [21] and its hydration speed and contribution to the strength was superior to C 3 S, so SMPC8 and SMPC10 had higher hydration speed and compressive strength.…”

Section: Compressive Strength Of Smpcmentioning

confidence: 99%

HYDRATING CHARACTERISTICS OF MODIFIED PORTLAND WITH Ba-BEARING SULPHOALUMINATE MINERALS

Wang¹,

Gong²,

Jibao³

et al. 2016

Ceramics - Silikaty

Self Cite

View full text Add to dashboard Cite

Formation mechanism of barium calcium sulfoaluminate mineral

Cited by 9 publications

References 17 publications

Formation and early hydration characteristics of C<sub>2.75</sub>B<sub>1.25</sub>A<sub>3</sub>$ in binary system of C<sub>2.75</sub>B<sub>1.25</sub>A<sub>3</sub>$-C<sub>2</sub>S

Formation and early hydration characteristics of C<sub>2.75</sub>B<sub>1.25</sub>A<sub>3</sub>$ in binary system of C<sub>2.75</sub>B<sub>1.25</sub>A<sub>3</sub>$-C<sub>2</sub>S

EFFECT OF K₂O AND MgO ON THE FORMATION AND HYDRATION ACTIVITY OF Ba-BEARING CALCIUM SULFOALUMINATE

HYDRATING CHARACTERISTICS OF MODIFIED PORTLAND WITH Ba-BEARING SULPHOALUMINATE MINERALS

Contact Info

Product

Resources

About