Ziyan Wang’s research while affiliated with Wuhan University of Technology and other places

... Based on the experimental results, they predicted the service life of modified concrete under sulfate corrosion. Xu et al. 8 . used phosphor gypsum-based cold-bonded fine aggregate to replace natural sand in the preparation of high-sulfate cement concrete. ...

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Modeling nonlinear stress-strain model for sulfate dry-wet cycle erosion of concrete: considerations for the initial compaction stage

... Mechanical properties of phosphogypsum cementitious materials were evaluated at various curing ages (1 d, 3 d, 7 d, 14 d, 28 d), as depicted in Fig. 3. (1) Initial Stages of Curing. Hydration within phosphogypsum cementitious materials primarily involves hemihydrate gypsum, culminating in the formation of a cohesive network of dihydrate phosphogypsum, thus establishing the primary framework of the material; during this process, the active constituents in the cement progressively infuse the framework of the phosphogypsum cementitious material [45]. During the initial mechanical properties testing, the compressive (2) Final Stages of Curing. ...

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Hydration analysis of phosphogypsum cementitious materials: mechanisms of mechanical property changes under water resistance experiments

... A notable influencing factor is the ambient curing moisture and improper curing methods, such as insufficient water, which are disadvantages to the hydration progress. Further, premature exposure to air (CO 2 ) leads to the decomposition of the already formed ettringite [15][16][17]. Thereafter, a comparative study on curing conditions affecting PCBA property evolution is desired so as to guide combined curing method selection for optimizing PCBA production. ...

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Comparison of Curing Conditions on Physical Properties, Mechanical Strength Development, and Pore Structures of Phosphogypsum-Based Cold-Bonded Aggregates

... A notable influencing factor is the ambient curing moisture and improper curing methods, such as insufficient water, which are disadvantages to the hydration progress. Further, premature exposure to air (CO 2 ) leads to the decomposition of the already formed ettringite [15][16][17]. Thereafter, a comparative study on curing conditions affecting PCBA property evolution is desired so as to guide combined curing method selection for optimizing PCBA production. ...

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Comparison of Curing Conditions on Physical Properties, Mechanical Strength Development, and Pore Structures of Phosphogypsum-Based Cold-Bonded Aggregates

... Four distinct heat absorption peaks were observed between 25 • C and 1000 • C. The peak between 100 • C and 200 • C corresponds to the decomposition of bound water in hydration products like AFt gels [57]. The heat absorption peak between 250 • C and 350 • C is attributed to the dehydration decomposition of AH3 [58]. The process involves dehydration of the CFH gel between 600 • C and 700 • C. The peaks between 750 • C and 850 • C correspond to the decarbonation of CaCO 3 , which forms due to CH carbonation during curing. ...

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Experimental Study of Alkali-Activated Cementitious Materials Using Thermally Activated Red Mud: Effect of the Si/Al Ratio on Fresh and Mechanical Properties

... Figures 11(e) and (f) show that when the SS content is 9%, wider cracks appear inside the specimen, the occlusion force between soil particles is weakened, and the overall compactness of the specimen decreases. In addition, excessive SS leads to the inhibition of the alkali activation reaction, a single form of hydration product inside the specimen, and the formation of hydration product receives limitation, which was similarly found by Dong et al [83]. Figure 12 shows SEM maps and black and white binary maps of SSCIT specimens at 7 d curing age under different curing conditions. ...

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Mechanical properties and microscopic mechanisms of carbon curing-alkali activation modified iron tailings

... Concrete is the world's largest volume of materials used in which the aggregate occupies up to 70% of the volume of concrete. PG can be prepared as a cold-bonded aggregate to prepare concrete with low production cost, which can reduce the use of natural coarse aggregates [6,7]. In a previous study, the preparation of PG into cold-bonded aggregates for the preparation of phosphogypsum-based concrete provided a feasible way to consume large amounts of PG [2]. ...

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Comparison of Curing Conditions on Physical Properties, Mechanical Strength Development, and Pore Structures of Phosphogypsum-Based Cold-Bonded Aggregates

... Additionally, when 10% modified lime mud was added, the resulting cement mortar exhibited remarkable rheology and mechanical properties. Wang et al. examined the impact of wet-milled calcined gangue on the hydration process and microstructure of phosphogypsum-based cementitious material [22]. They observed that the ultrafine powder derived from calcined gangue demonstrated superior dispersion and dissolution characteristics, leading to accelerated hydration rates and reduced setting time. ...

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Early-Age Behaviour of Portland Cement Incorporating Ultrafine Recycled Powder: Insights into Hydration, Setting, and Chemical Shrinkage

... The mass loss observed between 50 and 140 C can be attributed to the decomposition of AFt, C-S-H gel, and C-A-H gel. 3 Combined with the XRD analyses, these results indicate that the hydration products in G-CSSC and P-CSSC were primarily AFt and C-S-H gel, whereas the hydration products in D-CSSC were mainly C-A-H gel, AFt, and C-S-H gel. The decomposition temperature of gypsum is 107-180 C, 51 which overlaps with that of AFt and the gels. The DTG peak of the D-CSSC slurry at 300-400 C corresponds to the dehydration of hannebachite (H). ...

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Recycling waste gypsum and calcium carbide slag for the production of all-solid-waste supersulfated cement

... Materials 2025,18, 1135 ...

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Application of Phosphogypsum in Ultra-High-Performance Concrete (UHPC) Matrix for Strength Enhancement and Shrinkage Reduction