It was shown that the phosphogypsum, first treated by ball milling for 5 min and then modified at low temperature of 165 °C, had a flexural strength of 2.35 MPa and a compressive strength of 4.28 MPa, which meets the requirement of strength of phosphogypsum of grade 2.0 in "Calcined gypsum" (GB/T9776-2008), and its flexural …
The NSGM (1,4) model established in this paper could effectively simulate and predict the absolute dry flexural strength and the absolute dry compressive strength of the ball-milling-modified ...
The NSGM (1,4) model established in this paper could effectively simulate and predict the absolute dry flexural strength and the absolute dry compressive strength of the ball-milling-modified ...
Research related to traditional multiphase gypsum has mainly focused on the mineralogical and textural characterization of historic mortars and plasters [6], [10], [11], [12], [13].There is, however, a lack of systematic studies which correlate the properties of the set plaster (i.e., mechanical strength and weathering resistance) with the calcination …
The absolute dry compressive strength and absolute dry flexural strength of specimens were tested in accordance with the Chinese national standard "Determination of Mechanical Properties of Building Plaster" (GB/T 17669.3-1999) .
The 2 h flexural strength and absolute dry compressive strength of α-HHs with different modifiers all increased by comparation with the blank sample, and met the requirements of α30 in 《α-High strength gypsum plaster》(JC/T 2038–2010) [29]. The decrease of normal consistency and the increase of the well-crystallized crystals was the ...
As can be seen from Figure 1, under different mass ratios of material to ball and milling speed, the absolute dry flexural strength of phosphorus building gypsum first increased and then decreased with the increase in milling time.When the mass ratio of material to ball was the same, faster ball milling had a greater influence on the absolute …
methods used are according to the Chinese professional standard α-high strength gypsum. Table 3 Mechanical properties of α-high strength gypsum α-gypsum /g Water requierment Initial setting time /min Final setting time /min 2h Flexural strength /MPa Absolute dry compressive strength /MPa 100 0.39 4 9 6.3 46.31
As can be seen from Figure 1, under different mass ratios of material to ball and milling speed, the absolute dry flexural strength of phosphorus building gypsum …
The NSGM (1,4) model established in this paper could be used to conduct a valid simulation and prediction of the absolute dry flexural strength and compressive …
The utilization of gypsum reinforced composites as building materials has garnered considerable attention owing to their exceptional amalgamation of mechanical strength, fire resistance, and versatile applications. This review initiates by introducing gypsum as a pivotal mineral in construction, subsequently exploring the concept of …
The production of flue gas desulfurization gypsum poses a serious threat to the environment. Thus, utilizing gypsum-based self-leveling mortar (GSLM) stands out as a promising and effective approach to address the issue. β-hemihydrate gypsum, cement, polycarboxylate superplasticizer, hydroxypropyl methyl cellulose ether (HPMC), retarder, …
As shown in Fig. 8, when the water/gypsum ratio did not exceed 0.45, the absolute dry compressive strengths of the PPSS increased as the water/gypsum ratio …
The mechanism of polycarboxylate in phosphorus building gypsum is of great importance for the engineering application of this material. The theory of water film thickness has been well established ...
the optimum, with the absolute dry flexural strength and absolute dry compressive strength being increased to 8.1 MPa and 20.5 MPa, respectively, which were 50% and 24% higher than those of the
The absolute dry compressive strength of paste prepared from the short columnar α-CSH is 40.85 MPa, which reaches α40 strength grade. The synthesis of α-calcium sulfate hemihydrate (α-CSH) from flue gas desulfurization (FGD) gypsum is a good way to realize the comprehensive util
absolute dry compressive strength of phosphorus building gypsum were compared under different mass ratios of material to ball, ball-milling speed, and ball-milling time, and the NSGM (1,4) model
The 1d absolute dry flexural and compressive strength of building gypsum with bone glue of 2.8% were tested. The results show that 1d absolute dry flexural and compressive strength increased from 1.67 MPa and 4.75 MPa to 1.7 MPa and 7.00 MPa, respectively, after the addition of bone glue.
milling speed, the absolute dry flexural strength and absolute dry compressive strength of phos-phorus building gypsum firstly increased and then decreased with the increase in milling time. The NSGM (1,4) model established in this paper could effectively simulate and predict the absolute dry flexural strength and the …
We aim to strengthen our commitment towards our clients, the society and the environment; we further aim to contribute to the development of the building material industry in order to achieve a clear vision that can strengthen our structure …
The NSGM (1,4) model established in this paper could effectively simulate and predict the absolute dry flexural strength and the absolute dry compressive strength of the ball-milling-modified ...
The mineralogical composition, microstructure, and reactivity of traditional gypsum, a multiphase product, is closely connected to its calcination temperature, but systematic studies which relate ...
The NSGM (1,4) model established in this paper could effectively simulate and predict the absolute dry flexural strength and the absolute dry compressive strength of the ball-milling-modified phosphorus building gypsum; the average relative simulation errors were 12.38% and 13.77%, and the average relative prediction errors were 6.30% and 12.47%.
The preparation of fiber-reinforced phosphorus building gypsum composite materials (FRPGCs) is an important approach to enlarge the utilization of phosphogypsum resources. Through reinforcing phosphorus building gypsum (PBG) with basalt fiber (BF), this article probes into the effects of the length and fiber content of BF on the working …
Download scientific diagram | The prediction results of absolute dry compressive strength. from publication: Strength Prediction of Ball-Milling-Modified Phosphorus Building Gypsum Based on NSGM ...
Following the specifications stated in the 'Determination of Mechanical Properties of Building Gypsum' (GB/T17669.3-1999), part of the phosphorous …
Gypsum, from either nature or industrial by-products, can be a lower-cost and cleaner alternative binder to Portland cement used in construction projects, such as …
A hand-held moisture meter can be used to determine the relative moisture content of a gypsum panel surface but not the absolute amount. For instance, hand-held moisture meters can be used to identify areas of gypsum panels that are relatively "moist" and areas that are relatively "dry" after a building has been exposed to excessive ...
1036 Journal of Material Cycles and Waste Management (2023) 25:1035–1049 1 3 space are required for drying the products, which undoubt-edly increases the production costs associated with PBG-
Phosphogypsum is an industrial byproduct from the wet preparation of phosphoric acid. Phosphorus building gypsum can be obtained from phosphogypsum after high-thermal dehydration. This …
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