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Under water consumption for standard consistency, the effects of the mass ratio of material to ball, milling speed, and milling time on the absolute dry flexural strength of phosphorus building ...
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Construction gypsum: The construction gypsum produced by Shandong is tested with a standard consistency of 51% water consumption. The main chemical components are shown in Table I ... In the production process of …
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In addition, it has fine grains, a large specific surface area, and a large level of water consumption for its standard consistency. The theoretical water consumption for gypsum hydration is 18.6% of gypsum quality. However, in order to maintain the plasticity of gypsum slurry in the actual application, the added water accounts for 60–80% of ...
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When the calcination temperature rises to 220 °C, the setting time increases significantly, which may be related to the water consumption of standard consistency. When the calcination temperature is higher, more water is required. And excessive water can prolong the setting time.
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As can be seen from Fig. 5 and Table 3, the addition of HPMC can improve the water retention rate of gypsum and the standard water consumption. When HPMC is increased to 0.2%, the standard water consumption of plastering gypsum is increased to 92%, which reflects that the addition of HPMC can increase the water requirement for standard …
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Free water: the amount of water in excess of that chemically combined in gypsum. Fineness: the particle size distribution of gypsum and gypsum plaster. Normal consistency of gypsum plaster: the consistency at which a gypsum plaster will neither spread too readily nor remain in a consolidated mass when formed into a pat.
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Table 3 shows the influence of different ball-milling parameters on the strength of phosphorus building gypsum. Under water consumption for standard consistency, the effects of the mass ratio of ...
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Fig. 3 (b) shows the trend of increasing standard consistency water consumption with increasing CFBA. The standard consistency water consumption reaches a maximum value (41.71 %) when the CFBA to CFBS ratio is 1. The reason for this is that the particle size of the CFBA is smaller than that of the CFBS, resulting in an increased microfill effect.
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Table 3 shows the influence of different ball-milling parameters on the strength of phosphorus building gypsum. Under water consumption for standard consistency, the effects of the …
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Research shows that when the content of naphthalene series water reducing agent was 3% water reducing effect is best, the titanium gypsum sample standard consistency water consumption is 126%,2h flexural strength was 1.06MPa, 2h compressive strength was 1.97MPa, absolutely dry flexural strength was 2.21MPa and absolutely dry compressive ...
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According to the Chinese national standard "Gypsum Plasters—Determination of Mechanical Properties" (GB/T 17669.3-1999), the mechanical properties of phosphorus building gypsum after ball milling in each group were tested under water consumption for …
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The ball-milling treatment can effectively reduce the water consumption of normal consistency. ... Recycling phosphogypsum in road construction materials and associated environmental ...
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Research shows that when the content of naphthalene series water reducing agent was 3% water reducing effect is best, the titanium gypsum sample standard consistency water consumption is 126%,2h flexural strength was 1.06MPa, 2h compressive strength was 1.97MPa, absolutely dry flexural strength was 2.21MPa and absolutely dry compressive ...
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3.1 Effect of Physical Properties of Phosphorus Building Gypsum-Based Lightweight Concrete Materials. Setting Time and Standard Consistency.The gypsum-based material setting time and standard consistency water consumption is an important indicator in measuring the physical properties of the material inspection, which not only affects the …
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According to the Chinese national standard "Gypsum Plasters—Determination of Mechanical Properties" (GB/T 17669.3-1999), the mechanical properties of phosphorus building gypsum after ball milling in each group were tested under water consumption for standard consistency. 3. Results and Discussion 3.1.
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The focus of this study was to compare the effects of milling time on the performance of building gypsum, the consistency of physical and mechanical properties …
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2.4 Test methods 2.4.1 Macro-performance testing. The standard consistency water consumption, initial and final setting time and 2 h/adiabatic-flexural and compressive strength of modified phosphogypsum were tested in accordance with "Building Gypsum" (GB/T9776-2008). According to "Gypsum-based self-levelling mortar" (JC/T1023-2021), the …
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Abstract The phosphogypsum was first roasted into construction gypsum following the national standard GB/T 9776–2008, and then the gypsum-based material prop-erties were investigated in all aspects by using various admixtures and adjuvants, and the gypsum-based material properties such as standard consistency, setting time,
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The following Gypsum subdivisions have separate, non-potable water (meaning, do not drink it) for irrigation water/outdoor watering. This water is billed through your subdivision's HOA . Therefore, if you have questions regarding your …
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The normal consistency refers to the water consumption required for gypsum plaster to be mixed into a specific plastic state, which is the mass ratio of water to gypsum plaster. The normal consistency of gypsum plaster was measured according to Gypsum plasters-Determination of physical properties (GB/T 17669.4–1999, China national standard ...
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Setting Time and Standard Consistency. The gypsum-based material setting time and standard consistency water consumption is an important indicator in measuring the …
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Free Water 6 Fineness 7 Normal Consistency of Gypsum Plaster 8 Normal Consistency of Gypsum Concrete 9 Setting Time 10 Setting Time (Temperature Rise Method) 11 Compressive Strength 12 Density 13 1.3 The values regarded as standard are either in inch-pound units or SI (metric). The values stated first shall be regarded as the standard.
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Setting Time and Standard Consistency. The gypsum-based material setting time and standard consistency water consumption is an important indicator in measuring the physical properties of the material inspection, which not only affects the evalua- tion of its material quality, but also provides important information to the construction ...
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According to GB/T 21371-2008, the SO 3 content (mass fraction) in the standard cement prepared from natural gypsum is 2.0–2.5%, ... Further, it is superior to the cement prepared with natural gypsum in terms of water consumption for standard consistency, mortar fluidity, later strength, and compatibility with the water reducing agent. ...
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Indian Standard LOWGRADEGYPSUM-USE INBUILDING INDUSTRY-CODEOFPRACTICE 1 SCOPE 1.1 This standard covers the preparation and physical requirements of calcined gypsum made ... with addition of water. 7.3 Consistency of Gypsum Mortar The working consistency of mortar is usually judged by the worker during application. The quantity of water should ...
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The larger the specific surface area, the greater the water consumption of light gypsum mortar. The amount of water used for the standard consistency of cement directly results in the amount of water used. Poor adaptability of cement and admixtures will lead to changes in the proportion of water used. (2) The higher the mud and powder content ...
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2.4 Test methods 2.4.1 Macro-performance testing. The standard consistency water consumption, initial and final setting time and 2 h/adiabatic-flexural and compressive …
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The standard consistency water consumption of calcined gypsum powder was determined by referring to "Gypsum plasters-determination of physical properties of pure paste" (GB/T 17669.4–1999) [27]. The standard consistency water consumption was tested as follows: (1) 300 g calcined gypsum powder was weighed and stirred with certain amount of ...
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