No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
2 The influence of accelerators on the compressive strength of hardened gypsum slurry; a) early age (before 2 hours); b) long-term age (after 1 day) ... These results can provide a fundamental guide for the preparation of gypsum slurry building materials for three dimensional (3DP) in practical engineering. 1 Introduction.
The influence of temperature on liquid viscosity is more significant than that on surface tension, as shown in Fig. 18. When the temperature increased from 293 K to 373 K, the viscosity of Paratherm NF at 2.01 × 10 7 Pa, 1.01 × 10 7 Pa, and 1.0 × 10 5 Pa could be decreased 17.89, 12.79, 9 folds, respectively [119]. On the other hand, the gas ...
Mechanical force coupled temperature modification methods such as ball milling will be used to pre-treat phosphogypsum, and the influence laws of temperature, treatment …
At present, building gypsum, as an indispensable and important decorative material in building, became more and more commonly used in the plastering of interior walls of buildings. ... The results showed that pH and temperature had a great influence on retardation. Huang Yuyan et al. [9] ... The gypsum slurry was poured into the test mold ...
The use of phosphogypsum to prepare phosphorus building gypsum (PBG) is of great value to the resource utilization of phosphogypsum. In this study, PBG was ball-milled to obtain phosphorus ...
gypsum-based α-gypsum, and the influence of temperature, heatin g rate/heating mode on the thermal expansion properties of α-gypsum are studied, which can p r ov i de r e f e r e nc e s f o r t h e
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 affordable housing in developing countries. Although various building products have successfully used gypsum as the binder, some drawbacks of this material have still been claimed, for example, …
In this study, the pore structure of a hardened phosphorous building gypsum body was optimised by blending an air-entraining agent with the appropriate water–paste ratio.
Civil Engineering Journal Influence of Gypsum on the Residual Properties of Fly Ash- Slag-Based Alkali-Activated Concrete March 2024 Civil Engineering Journal 10(03):915-927
In this study, a slurry-particle mixing system was proposed for the preparation of PBG-based building materials with homogeneous hydration at low water/gypsum ratios. More specifically, slurry ...
building gypsum and so on ([2],[5]). In order to expand ... This subject aims to study the influence law of desulfurization gypsum and aluminate cement on slag ... temperature to 800 ℃, and ...
Zeolite Socony Mobil-5 (ZSM-5) is a commonly spent catalyst in the petrochemical industry; and phosphogypsum (PG) is a kind of industrial waste produced in the process of phosphoric acid production. The environmental …
This study explored the production of a medium–low strength α-hemihydrate gypsum (α-HH) from phosphogypsum using an autoclaved method. The influence of slurry …
The results show that the incorporation of whiskers reduced the processability of the FGD gypsum slurry. The mechanical properties of FGD gypsum improved greatly because the whiskers can increase the contact points between the crystals and fill the pores in FGD gypsum. ... such as the preparation of building gypsum boards, backfill materials ...
The results show that all eight kinds of retarders have a different degree of retarding effect on building gypsum, and at the same time, they all have different degree of …
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 composite materials and …
2.1.2 Preparation of Specimens for MOR, AFL, and Permeability Test. Rectangular wax plates having dimensions 100 × 25 × 6 mm as shown in Fig. 2 have been used to measure the MOR and AFL of mould. Specimens were prepared by dipping the wax plates repeatedly in various ceramic slurries, as per experimental design shown in Table 4.This was followed by …
Influence of Early Strength Agent on the Strength and Water Resistance of Cement-Desulfurized Building Gypsum Composite Cementitious System January 2022 Journal of Physics Conference Series 2174(1 ...
Abstract: According to the actual situation there are poor adaptability between water reducing agents and gypsum in the production of plaster board, three types of water-reducing agent are chosen in this subject: lignin, naphthalene and polycarboxylate. Based on the requirements of the production process,effects of three different types of water-reducing agent on setting time, …
In order to achieve the resourceful, large-scale and high-value utilization of bulk industrial solid wastes such as flue gas desulfurization gypsum (FGDG), fly ash (FA) and ground blast furnace slag (GGBS), and to reduce the dosage of cementitious materials, orthogonal experimental methods were used to prepare composite cementitious materials based on the …
Mashifana 13 analyzed the influence of curing method and phosphogypsum content on PFM. The results show that high temperature curing can improve the strength of …
The utilization of desulfurized building gypsum as raw material for gypsum-based self-leveling mortar (GSL) is limited by its low strength and poor water resistance.
DOI: 10.1016/j.jobe.2022.105640 Corpus ID: 254356164; Physical and mechanical properties of gypsum-based composites reinforced with basalt, glass, and PVA fibers @article{Li2022PhysicalAM, title={Physical and mechanical properties of gypsum-based composites reinforced with basalt, glass, and PVA fibers}, author={Zhenxing Li and Xin Wang …
The paper presents an assessment of the impact of using additives on the strength of a binding material, i.e., building gypsum, and also the phase transformation that takes place in it.
In the limestone gypsum flue gas desulphurisation process, 2.7 tons of FGDG can be produced for every 1 ton of SO 2 that is removed [2]. Compared with natural gypsum, FGDG has a smaller and more uniform particle size and a larger specific surface area; therefore, FGDG has a certain importance in industry.
Wang Qiqing:Building materials and application of gypsum.Beijing:Chemical Industry Press, 2008:16-17. Comarison of different processing method of phosphogypsum Jan 2011
Ternary binders, unlike OPCs, produce a large number of AFt during hydration. Curing conditions will affect the formation of AFt and further influence its mechanical properties [20], [21]. Polymer films in polymer-modified repair mortars will also be affected by curing temperature and humidity during the formation process [22]. This study ...
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 performance …
The dehydration temperature depends on the measurement method, the gypsum origin (natural, FGD), the type of required calcium sulfate hemihydrate (α, β), and the …
However, when the drying temperature of FGDG was 105 °C or 220 °C, most of FGDG consisted of dihydrate gypsum and anhydrous gypsum, which reacted with water to …
