Ting Zhang's research while affiliated with Tongji University and other places

Publications (24)

Article
Research on low-heat cement (LHC) was significant for the preparation of mass concrete. However, the low early strength was one of the difficulties during the engineering applications. In present study, steel slag (SS) was used to produce LHC, and nano-SiO2 (NS) was added to promote the early strength development. Cement was replaced by SS, and NS...
Article
Both sodium carbonate (NC) and sodium phosphate (NP) could immediately precipitate in the presence of calcium ions (Ca²⁺), and these precipitates would deposit on the surface of cement as one layer in cement paste. However, these precipitates have different effects on the hydration of cement. In this study, effect of NC and NP on cement hydration w...
Article
This paper presented a comprehensive study on the early-age hydration process and autogenous shrinkage evolution of high performance cement (HPC) pastes based on ¹H nuclear magnetic resonance relaxometry (¹H NMR). The transverse relaxation time (T2) was measured to characterize the water consumption process of cement pastes. The hydration process a...
Article
Selection of mineral admixtures (MAs) was an effective way to reduce the rapid heat release of mass concrete at early ages, avoiding the cracks caused by the thermal stress. Herein, fly ash (FA), steel slag (SS) and ground granulated blast-furnace slag (GGBS) was used to replace cement with the dosage of 40%, and the early hydration process and mic...
Article
Beta-hemihydrate phosphogypsum (β-HPG) as a cementitious material can be used for the preparation of lightweight gypsum to facilitate the utilization of phosphogypsum (PG) and reduce the energy consumption of buildings. In this work, expanded polystyrene (EPS) particles as lightweight aggregates were mixed with β-HPG during the preparation process....
Article
Full-text available
Gypsum materials are suffering a shortened service life on account of its poor resistance to moisture and dirt. To overcome such drawbacks, the SiO2/silicone hybrid superhydrophobic surface was introduced on the gypsum surface by the cross-linking of siloxane via sol–gel method. In this study, chemical property and microtopography of the coated sur...
Article
In this study, barium slag (BS) was utilized as a supplementary cementitious material (SCM) to improve the chloride-binding ability of cement pastes. Hardened paste specimens with 0–30% BS content were prepared, and the chloride binding rate (CBR) was evaluated. The compressive strength was tested, and the hydration heat was assessed. The mechanism...
Article
Effect of triisopropanolamine (TIPA) on compressive strength and hydration properties of cement-lithium slag (LS, 30%) paste was studied. The results demonstrated that the addition of TIPA is advantageous for compressive strength at 7 d, 28 d and 60 d. The reason was related to the pore complexity and hydration process of cement and LS. TIPA reduce...
Article
Chloride was one of important factors resulting in steel bar corrosion in reinforced concrete when using sea resources. In this paper, an attempt to promote the chloride binding capacity of the cement-ground-granulated blast furnace slag (GGBS) system was made by adding triisopropanolamine (TIPA). The paste was prepared by 70 wt% cement and 30 wt%...
Article
Turmeric residue, a solid waste discharged from the curcuminoids industry, is difficult to recover due to high concentrations of strong acids, organic solvents, and plant fibers. In this study, organic turmeric residue was used as the main raw material for the preparation of ceramic foam, in comparison with inorganic granite scraps. The bulk densit...
Article
TiO2@SiO2 composite microspheres (TS) were prepared by the deposition of TiO2 on the raspberry-like SiO2@polystyrene microspheres (PSS). The hollow microspheres with hierarchical microtopography possess both improved photocatalytic activity and stabilized TiO2 particle structure. The results of energy dispersion spectrum (EDS) mapping, X-ray photoe...
Article
This paper investigates effect of colloidal nano-SiO2 (CNS) on chloride immobilization of cement-fly ash (FA) system composed of 70% cement and 30% FA from 7 d to 90 d age. The mechanism is revealed in terms of migration resistance, chemical binding, and physical binding; and each aspect is determined with corresponding measurements, including micr...
Article
Polycarboxylate superplasticizer (PCE) and aliphatic superplasticizer (AS) are widely used water-reducing agent in concrete. In actual practice, the addition of AS has been developed as a common way to alleviate the bleeding and segregation of concrete plasticized by PCE, while the main reason for this phenomenon is not clear. In this research, the...
Article
This study investigated the effects of amorphous aluminum hydroxide (AAH) on chloride ions immobi-lization ability of cement-based materials. Paste samples with different dosages of AAH were prepared, and the chloride binding capacity was examined. Hydrates at the age of 7 d and 28 d were analyzed by X-ray diffraction (XRD), thermo-gravimetric anal...
Article
The influences of nano silica (NS) on the hydration and microstructure development of steam cured cement high volume fly ash (40 wt%, CHVFA) system were investigated. The compressive strength of mortars was tested with different NS dosage from 0 to 4%. Results show that the compressive strength is dramatically improved with the increase of NS conte...
Article
This paper aims to investigate the effect of triisopropanolamine (TIPA) on compressive strength and hydration of cement-fly ash paste. The samples with various dosages of TIPA were prepared with 30% fly ash (FA) and 70% cement (water/binder ratio by weight = 0.38), and cured under the standard condition. The compressive strength, pore structure, hy...
Article
Full-text available
Utilization of sea sands and coral aggregate for concrete in ocean construction is increasingly attracting the attention all over the world. However, the potential risk of steel corrosion resulting from chloride in these raw materials was one of the most concerned problems. To take this risk into account, chloride transporting to the surface of ste...
Article
Formation of Friedel’s salt (FS) and Kuzel’s salt (KS) can chemically bind chloride in cement-based materials, and in cement-fly ash system, this can be facilitated by the pozzolanic reaction of fly ash (FA), with obvious contribution to the chloride binding capacity. In this study, FA was pretreated with alkali solution in order to depolymerize th...
Article
Effect of polycarboxylate superplasticizer (PCE) on fluidity of magnesia phosphate cement (MPC) paste was investigated. The fluidity and fluidity loss were assessed with mini slump. Hydration process of MPC in the presence of PCE was analyzed with setting time, hydration heat, X-ray diffraction (XRD), scanning electron microscope (SEM), and conduct...
Article
Generally, bleeding and segregation can be solved with addition of hydroxypropyl-methyl cellulose ether (HPMC) in real concrete. However, the negative effect of this on dispersion of polycarboxylate superplasticizer (PCE) can always be found. In order to deeply understand this negative effect, the rheology of cement paste in the presence of PCE and...

Citations

... The approximately identical mechanical properties of PO samples at 7 and 28 days (Fig. 4) also ascertain this hypothesis. Previous works assumed that calcium phosphate (amorphous and/or crystalline precipitate) might produce and retard cement hydration [84]. However, due to the variability in mineralogy and reactivity in cementitious phases of such phosphate-binder systems, no clear and recognized conclusion was ever drawn that reveals the interaction in complex processes. ...
... For instance, the total shrinkage of specimens (5% of SF) is 150% greater than that of the reference group, and the increment rate surged to 250% when the substitution level of SF was further increased to 10%. At the same time, FA mainly decreased the shrinkage rate within 6 h after the initial setting of specimens, and the shrinkage magnitude within 6 h after the initial setting time accounted for the majority of early shrinkage after the final 72 h [42,43]. ...
... According to the source, mineral admixtures can be divided into three categories: natural, artificial and industrial solid waste. Natural mineral admixtures include volcanic ash, tuff, zeolite powder, siliceous shale, etc.; artificial mineral admixtures include calcined shale, metakaolin, etc.; industrial solid waste mineral admixtures include granulated blast furnace slag, fly ash, silica fume, etc. [11][12][13]. Replacing part of cement in mortar or concrete with mineral admixtures can reduce cement consumption, thereby reducing carbon dioxide emissions and natural resource consumption [4,5]. At the same time, mineral admixtures can also improve the performance or strength of concrete have better fresh concrete properties. ...
... While no mixing problems were mentioned by Garcia Santos (2009) at the use of the 2% amount of EPS with addition of 2% of polypropylene fibers, Sayil and Gurdal (1999) stated that the epoxy resin had to be added to improve the contact of the polystyrene granules with the gypsum when EPS was added in higher amount 5-7% by mass. Jin et al., (2021) used EPS granules modified by triethanolamine and ethylene-vinyl acetate copolymers. ...
... The slag and fly ash mixed mortars showed the widest red color band near the exposure surface. Besides, the added SCMs could increase the chemical immobilization of chloride ions by increasing the formation of Friedel's salt [37], which further resisted the penetration of chloride into samples. Thus, the contamination depth of 0.53-CO specimen was much deeper than SCMs blended specimens, and most of chloride ions were concentrated on near surface area as the wide red color area were observed. ...
... While not compromising the concrete strength at a late age, accelerators, or early-strength agents are widely used to boost cement hydration that promotes its early strength development [1]. The current accelerators that were widely used mainly include inorganic salts (e.g., calcium chloride, sodium sulfate) and organic chemicals (e.g., triisopropanolamine) [1,2]. Some traditional accelerators, such as calcium chloride, can significantly improve the compressive strength of concrete from 1 to 7 days, make hydration heat release earlier, and avoid early freezing damage of concrete, which is very suitable for winter construction. ...
... Generally, the raw materials used in the production of commercialized porous ceramics are mainly silica, titania, zirconia, alumina and silica carbide, which are relatively expensive and have limited application range [12]. However, with the need to mitigate the pressure on the limited primary resources, investigations into the potential use of waste streams in the development of porous ceramics has become a notable research topic [13][14][15][16]; some reported waste streams used in the development of porous ceramics include nickel smelting slag [1], kerf waste [17], soda-lime-silica glass [18], stone wool waste and recycled glass [9], coal fly ash and asbestos tailings [19], gold tailings [6], granite scraps [11], turmeric residue [20], and red mud [21]. Considering the interest of waste streams upcycling for an efficient use of resources, further research activities in this direction need to be pursued. ...
... The peak located at 529.6 eV and 532.7 eV were related to Ti-O-Ti and Si-O-Si. The peak at 532.0 eV could be assigned to the binding energy of the Si-O-Ti species, indicating the bonding of TiO 2 to SiO 2 [39]. Figure 8f showed the XPS spectrum of Si 2p of the sample TiO 2 -SiO 2 . ...
... Organic corrosion inhibitor can be adsorbed on the surface of steel bars [47]. For a given content, the inorganic corrosion inhibitor can lead to a greater R p compared to the reference group. ...
... Apparently, such accelerated cement hydration due to the SNI addition made F 40 N 3 have ~17% CH at 28 days despite 40% FA substitution. Then, it is construed that late pozzolanic activity of FA consumed CH to produce additional C-S-H gel, which increased the compressive strength, similar to F 40 N 0 (Fig. 4) [59,60]. ...