iNfluEnce OF gYPsum adDitIVE ON THe GyrOLIte

Influence of gypsum additive on the gyrolite formation ...

2010-3-1 · The influence of gypsum additive on the gyrolite formation process and a sequence of intermediary compounds formation in the CaO–SiO 2 ·nH 2 O–H 2 O system was examined and explained. The synthesis has been carried out in unstirred suspensions. The molar ratios of primary mixtures were CaO/SiO 2 = 0.66. The amount of sulphate ions to be ...

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Influence of gypsum additive on the gyrolite formation ...

Gypsum additive has no influence on the re-crystallization temperature of C–S–H(I), Z-phase and gyrolite into wollastonite. The composition of initial mixtures is recommended to calculate according to molar ratios. In other cases, upon increasing the amount of sulphate ions, the basicity of the mixture decreases and gyrolite forms more ...

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Influence of gypsum additive on the gyrolite formation ...

The influence of gypsum additive on the gyrolite formation process and a sequence of intermediary compounds formation in the CaO–SiO2·nH2O–H2O system was

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Influence of Gypsum Additive on the Gyrolite Formation

Gypsum additive has no influence on the re-crystallization temperature of C-S-H(I), Z-phase and gyrolite into wollastonite. The composition of initial mixtures is recommended to calculate according to molar ratios. In other cases, upon increasing the amount of sulphate ions, the basicity of the mixture decreases and gyrolite forms more difficult.

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10.1016/j.cemconres.2009.11.004 | 10.1016/j ... - DeepDyve

2020-6-11 · Kuatbaev has shown that gypsum additive has no influence on the solubility of quartz, but he stated that gypsum is more soluble than quartz and the solution contains a significant excess of anions. For this reason, SiO 4 4− is isomorphically replaced by SO 4 2− , and SO 3 -substituted calcium silicate hydrates, more soluble than pure ...

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Influence of Gypsum Additive on the Formation of ...

The quality of the aerated concrete strongly depends on the chemical composition of the raw materials, as well as the process of the hydrothermal reaction during autoclaving. Due to the variable chemical composition of fly ashes, it is necessary to identify the effect of each ion on the formation of the microstructure of aerated concrete. This paper examines the process of

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Influence of gypsum additive on the formation of

2017-6-9 · Influence of gypsum additive on the formation of calcium silicate hydrates 1093 The main objective of the present work was to examine the influence of gypsum additives on the formation of calcium silicate hydrates in the CaO–SiO 2·nH 2O–H 2O mixture with C/S = 0.83 or 1.0 as well as to analyze and explain the formation of

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The Influences of Gypsum Water-Proofing Additive on

Influence of gypsum water-proofing additive on dihydrate gypsum crystal appearances Fig. 1 clearly shows the changes of the appearance of dihydrate gypsum crystals. Fig. 1(a) provides a typical kind of gypsum crystal appearance, whose needle crystal of big length – radius ratio interweaves together vertically and horizontally.

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Influence of additives on the precipitation of gypsum in ...

Influence of additives on the precipitation of gypsum in sodium chloride solutions: by O.A. Al Hadad and S.K. Hamdona. Desalination 228 (2008) 277-286. Abstract The kinetic of precipitation of calcium sulfate dihydrate (gypsum) in sodium chloride solutions was investigated at various supersaturation from 1.05–2.49, pH = 8.50, 25°C and ionic ...

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The effect of gyrolite substituted with cadmium ions on ...

2020-1-22 · It was found that during the main reaction of calcium silicate, the additive of gyrolite contaminated with cadmium ions had no influence on the apparent reaction rate (W app) of the hydration process (7–12 h): in all samples, the increase in the degree of hydration (∆α) was almost the same: ∆α = 15%.

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Influence of Gypsum Additive on the Formation of ...

The quality of the aerated concrete strongly depends on the chemical composition of the raw materials, as well as the process of the hydrothermal reaction during autoclaving. Due to the variable chemical composition of fly ashes, it is necessary to identify the effect of each ion on the formation of the microstructure of aerated concrete. This paper examines the process of

Read More
Influence of gypsum additive on the formation of

2017-6-9 · Influence of gypsum additive on the formation of calcium silicate hydrates 1093 The main objective of the present work was to examine the influence of gypsum additives on the formation of calcium silicate hydrates in the CaO–SiO 2·nH 2O–H 2O mixture with C/S = 0.83 or 1.0 as well as to analyze and explain the formation of

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Influence of gypsum additive on the formation of calcium ...

The influence of gypsum additive on the formation of calcium silicate hydrates and on the formation of a sequence of intermediary compounds in the CaO-SiO2onH2O-H2O system has been examined. The synthesis was carried out in unstirred suspensions. The molar ratios of primary mixtures were CaO/SiO2 = 0.83, 1.0 and SO3/(SiO2 + SO3) = 0, 0.0125, 0.025.

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Influence of gypsum and limestone, used as mineral ...

Gypsum is a very popular mineral additive used in autoclaved aerated concrete (AAC) technology. In many studies, tobermorite can be synthesized from calcium-silicate-hydrate (C-S-H) phase under hydrothermal conditions in the presence of gypsum, and its impact on the tobermorite content in the AAC blocks has been discussed.

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The influence of Cd-impure gyrolite on the hydration of ...

2014-7-20 · The influence of the impure gyrolite additive on the hydration of CBM. It should be emphasized that the nature of the CBM calorimetry curve is similar to the one of OPC as it involves all the five stages (the initial reaction, the induction period, the acceleratory period, the deceleration period, and the period of slow continued reaction).

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Influence of gypsum additive on the formation of calcium ...

The influence of gypsum additive on the formation of calcium silicate hydrates and on the formation of a sequence of intermediary compounds in the CaO-SiO2·nH2O-H2O system has been examined. The synthesis was carried out in unstirred suspensions.

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Influence of the Gypsum Dehydration Temperature and

2010-10-7 · Influence of the Gypsum Dehydration Temperature and Alkali Additives on the Properties of Anhydrite Cement V. Leskeviciene, I. Sarlauskaite, D. Nizeviciene*), N. Kybartiene Kaunas University of Technology, Radvilenu 19, LT ─ 50270 Kaunas, Lithuania Abstract: While dehydrating gypsum with additives at the temperatures of 800 °C and 900 °C the

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The effect of gyrolite substituted with cadmium ions on ...

2020-1-22 · It was found that during the main reaction of calcium silicate, the additive of gyrolite contaminated with cadmium ions had no influence on the apparent reaction rate (W app) of the hydration process (7–12 h): in all samples, the increase in the degree of hydration (∆α) was almost the same: ∆α = 15%.

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Influence of Tylose MH1000 Content on Gypsum Thermal ...

The presented work focuses on the influence of a water-soluble derivative of cellulose, hydroxyethyl methyl cellulose (HEMC), on gypsum thermal properties. The polymer is used as an additive in the weight fraction, up to 1% of pure gypsum. The water-to-gypsum ratio was taken at a

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Analysis of Additives in Gypsum Coatings Based on

2021-9-30 · In this paper, we evaluate different gypsum coating additives that are available on the market, which are categorized by their chemical bases. The results will serve as a reference for future investigations of new additive bases in order to improve the properties of gypsum. As such, the objective of the this study is to assess the workability, mechanical behavior, and crystalline

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Influence of gypsum additive on the formation of

2017-6-9 · Influence of gypsum additive on the formation of calcium silicate hydrates 1093 The main objective of the present work was to examine the influence of gypsum additives on the formation of calcium silicate hydrates in the CaO–SiO 2·nH 2O–H 2O mixture with C/S = 0.83 or 1.0 as well as to analyze and explain the formation of

Read More
The Influences of Gypsum Water-Proofing Additive on

Influence of gypsum water-proofing additive on dihydrate gypsum crystal appearances Fig. 1 clearly shows the changes of the appearance of dihydrate gypsum crystals. Fig. 1(a) provides a typical kind of gypsum crystal appearance, whose needle crystal of big length – radius ratio interweaves together vertically and horizontally.

Read More
Influence of additives on the precipitation of gypsum in ...

Influence of additives on the precipitation of gypsum in sodium chloride solutions: by O.A. Al Hadad and S.K. Hamdona. Desalination 228 (2008) 277-286. Abstract The kinetic of precipitation of calcium sulfate dihydrate (gypsum) in sodium chloride solutions was investigated at various supersaturation from 1.05–2.49, pH = 8.50, 25°C and ionic ...

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The influence of flue gas desulphurization gypsum additive ...

The influence of flue gas desulphurization gypsum additive on characteristics and evolution of humic substance during co-composting of dairy manure and sugarcane pressmud. Guo X(1), Huang J(1), Lu Y(1), Shan G(1), Li Q(2).

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Influence of gypsum additive on the formation of calcium ...

The influence of gypsum additive on the formation of calcium silicate hydrates and on the formation of a sequence of intermediary compounds in the CaO-SiO2onH2O-H2O system has been examined. The synthesis was carried out in unstirred suspensions. The molar ratios of primary mixtures were CaO/SiO2 = 0.83, 1.0 and SO3/(SiO2 + SO3) = 0, 0.0125, 0.025.

Read More
Influence of gypsum and limestone, used as mineral ...

2018-9-1 · Gypsum is a very popular mineral additive used in autoclaved aerated concrete (AAC) technology. In many studies, tobermorite can be synthesized from calcium-silicate-hydrate (C-S-H) phase under hydrothermal conditions in the presence of gypsum, and its impact on the tobermorite content in the AAC blocks has been discussed.

Read More
Influence of gypsum additive on the formation of calcium ...

The influence of gypsum additive on the formation of calcium silicate hydrates and on the formation of a sequence of intermediary compounds in the CaO-SiO2·nH2O-H2O system has been examined. The synthesis was carried out in unstirred suspensions.

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Gypsum Wallboard Chemical Additives

2015-7-30 · Gypsum, unlike cement, is a physical structure rather than a chemical structure. The needle-like gypsum crystals form a network to give the board its physical integrity The crystals are closely interwoven, giving the core most of its wet strength. After drying, the frictional forces of these crystals increase the strength of the core.

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The effect of gyrolite substituted with cadmium ions on ...

2020-1-22 · It was found that during the main reaction of calcium silicate, the additive of gyrolite contaminated with cadmium ions had no influence on the apparent reaction rate (W app) of the hydration process (7–12 h): in all samples, the increase in the degree of hydration (∆α) was almost the same: ∆α = 15%.

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Effects of additives on physical, chemical, and ...

2021-8-7 · Effects of additives on physical, chemical, and microbiological properties during green waste Bioresource Technology ( IF 9.642) Pub Date : 2021-08-04, DOI: 10.1016/j.biortech.2021.125719 Zexin Yin, Lu Zhang, Ruinan Li

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