Linhua Jiang

• Doctor of Philosophy
• Hohai University

Polyacrylamide has been widely used as a viscosity-modifying admixture in cementitious materials. However, previous studies mainly focus on how polyacrylamide affects fresh properties of host materials, with scant attention on the hydrate of portlandite (CH) in hardened cement-based materials. In this study, the impact of polyacrylamide on the hydr...

The durability problem caused by the high-water absorption of foamed concrete restricts its further development and application. This study aimed to improve the durability of foamed concrete by transforming its performance from hydrophilic to superhydrophobic. Firstly, polydimethylsiloxane-modified superhydrophobic bulk foamed concrete was produced...

Manufactured sand has the potential in mitigating environmental risks caused by concrete production using natural river sand, whist the performance of concrete can be effectively enhanced by the integration of styrene-acrylic emulsion (SAE) polymers. However, the properties and mechanisms of SAE-modified concrete comprising manufactured sand remain...

Researching the rheology contributes to enhancing the physical and mechanical properties of concrete and promoting material sustainability. Despite the challenges posed by numerous factors influencing viscosity, leveraging machine learning in the era of big data emerges as a viable solution for predicting the general properties of construction mate...

In order to reduce the negative impact on the environment caused by the massive accumulation of red mud (RM) and Yellow River sand (YRS), new alkali-excited granulated blast-furnace slag (GGBS)/RM/YRS (AGRY) geopolymer cementitious materials were prepared by combining RM and YRS with GGBS in different ratios and using sodium silicate as the alkali...

This work successfully prepared fair-faced concrete with mirror effect. The gray value standard deviation, porosity, crack rate and glossiness of the concrete surface were used to characterize the apparent quality of fair-faced concrete. The effect of polycarboxylate superplasticizer and polyacrylamide viscosity-modifying admixture on mirror effect...

The electric machinery industry is currently facing a significant challenge in the application of electrical contact materials with appropriate electrical and tribological performance. The use of conductive lubricants, including liquid, solid, and semi-solid varieties, represents a key approach to meeting technical and sustainable criteria. This st...

The effect of hydrostatic pressure and cation type on chloride ion transport in marine underwater concrete cannot be ignored. The study of the chloride ion transport behavior of concrete under the effect of hydrostatic pressure and cation type coupling can provide a basis for durability design and the protection of marine concrete. In this work, th...

Mica is a harmful substance in sand and occurs frequently. The application of super standard mica sand is a difficult problem in large-scale engineering. In this work, the effects of an interface modifier, mineral admixture, and a curing system on the properties of cement-based materials with super standard mica sand were studied. The strength of c...

This work investigated the effect of layered double hydroxides (LDHs) on the calcium leaching of cement pastes. The mass loss, porosity, leaching depth, compressive strength, and Vickers hardness were applied to evaluate the resistance to calcium leaching. Electrochemical impedance spectroscopy, X-ray diffraction, thermogravimetric analysis, scanni...

Self-sensing composites based on carbon fibers (CFs) offer a wide range of remarkable properties, making them suitable for various significant industrial and engineering applications. In this study, the wet-laid method was employed to prepare flexible short carbon fiber felts (CFFs). The microstructure analysis was performed using scanning electron...

Red mud (RM) and Yellow River sediment (YRS) are challenging to handle as waste materials. In this study, RM with geopolymer and heavy metal adsorption characteristics was combined with YRS and ground granulated blast furnace slag (GGBS) to develop a porous geopolymer with high strength and high adsorption performance. A geopolymer cementitious mat...

Citric acid (CA) and chitosan (CS) were employed to modify magnesium oxychloride cement (MOC). Multiscale measurements were implemented to study the properties of the modified MOC pastes. Results show that the addition of CA/CS significantly changes the content of each phase and the microstructure of phase 5. The single addition of CA can effective...

In this study, the effect of curing temperature on mechanical strength and thermal properties of hydraulic limestone powder (LS) concrete is investigated. The hydration products and microstructure of hydraulic LS concrete are characterized through X-ray diffraction (XRD), thermogravimetry (TG), scanning electron microscopy (SEM), and mercury intrus...

Three types of electrodeposition, DC electrodeposition, low-frequency pulsed electrodeposition and high-frequency pulsed electrodeposition, were used to deposit cuprous oxide on the concrete surface to improve the antibacterial properties of concrete. The effects of pulse deposition frequency on the antibacterial property of concrete were studied u...

Discharged slag not only occupies a large amount of land for disposal, but also causes serious environmental pollution. The use of alkali-activated slag (AAS) instead of cement as a soil-stabilization agent is beneficial for industrial waste disposal and energy conservation, which complies with the concept of green and low-carbon sustainable develo...

The hydration kinetics of cement pastes with deoxyribonucleic acid (DNA) were studied. And the hydration products and microstructure of cement pastes were detected by XRD, SEM, and MIP. The results reveal that, compared with the blank sample, the maximum hydration heat flow and cumulative heat release rate of samples with DNA decrease. The compress...

Due to the superior catalytic properties, amorphous alloy (AA) can be used in concrete of sewage system to achieve wastewater treatment and bacteria inactivation, thus mitigating microbial-induced concrete corrosion and promoting the durability of concrete. In this study, three types of Cu/Ti amorphous alloys (AA) prepared by ball milling method ac...

Graphene can effectively improve the mechanical and electrical properties of cement-based materials due to its excellent tensile strength, thermal conductivity and electrical conductivity. In this paper, the effects of freeze–thaw on the conductivity and sensing properties of graphene-based cement materials were investigated. After the preparation...

Temperature control is needed in the construction process of massive concrete and it can avoid the concrete cracks. Prediction of temperature development based on a hydration kinetics model can reduce the need for adiabatic temperature rise tests for concrete. However, the existing hydration kinetics model cannot accurately describe the hydration p...

Cracking is a recurring defect that typically arises during the construction and service periods of cementitious materials. Self-healing based on stimuli-responsive microcapsules has shown to be a cutting-edge technology to make cementitious materials sustainable. Despite the reported implementation of microcapsules in various fields, the strategie...

This study investigated the effect of layered double hydroxides (LDHs) on the deterioration process of cement paste in the sulfate environment. Cement pastes with the addition of original and calcined LDHs at 2.5 wt.% and 5.0 wt.% of cement were exposed to Na2SO4 solution for 360 days. The macroscopic performance of the cement paste was assessed ba...

Hybrid nanoSiO2 (HNS) modified cement pastes were explored as a kind of surface protection material (SPM). The carbonation resistance and mechanical properties of SPMs coated samples were tested. Thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscope (SEM), and mercury intrusion porosimetry (MIP) were further employ...

This work focuses on evaluating the influence of four cationic chloride salts (NaCl, KCl, MgCl2 and CaCl2) on chloride ion diffusion characteristics of alkali-activated slag mortar. The chloride ion concentration profiles of alkali-activated slag mortar were tested in single cation and combined cation source solutions. The hydration products and me...

In surface treatment technics of cement-based materials, nanoSiO2 (NS) is effective in refining pore structure while organic water-repelling agents are often used for producing a hydrophobic surface. Due to its advantages of pore refining effect and hydrophobicity, the organic-inorganic hybrid nanoSiO2 has attracted increasing attention. However, t...

In this study, Cu2O/CuO and Cu were electrodeposited onto a mortar surface to protect concrete sewers from microbially induced corrosion. The effects of temperature and electrolyte pH on the antimicrobial performance of the electrodeposited specimens were investigated through surface analysis and measurements of bacteria inhibition rate during the...

The purpose of this study is to evaluate the influence of cation types on the rust resistance performance of new nucleic acid corrosion inhibitors in simulated concrete pore solution. Four common chlorinated ice salts (sodium chloride (NaCl), potassium choride (KCl), calcium chloride (CaCl2) and magnesium chloride (MgCl2)) were selected to study th...

This paper investigated the effect of citric acid (CA), magnesium citrate (CM), and lithium citrate (CL) on the expansion property and hydration behavior of light-burned magnesia (LBM) cement-based materials. Setting time, linear expansion, hydration kinetics, thermogravimetric analysis, XRD and SEM were used to characterize the expansion and hydra...

New nanofluids based on graphene (GR) and GR/MXene were prepared to enhance the thermal conductivity. The thermal conductivity and viscosity of nanofluids at various temperatures in the 5-60 °C range were tested, and their stability was investigated by zeta potential and visual observation. The thermal performance of the nanofluids was evaluated th...

The reinforced concrete structures in subway engineering are generally subjected to combined exposure of chloride, sulfate and electric fields. Thus, it is necessary to reveal a way of enhancing corrosion resistance of concrete in this complicated environment condition. Although improvement of concrete properties by addition of nano silica is well...

This work aimed to evaluate the effects of limestone powder (LP) replacement fraction (8–24 wt%) on chloride diffusion and chloride threshold (Cth) for corrosion initiation. Depassivation of steel was diagnosed by monitoring the self-corrosion potential and corrosion current density using open circuit potential and AC impedance tests, respectively....

The effect of combined cations in diffusion source solutions on chloride diffusion behavior in concrete is unknown, and present research on the effect of combined cations on chloride diffusion behavior in concrete is insufficient. This paper uses natural diffusion experiment as research condition, and uses the concrete with water-binder ratio of 0....

Limestone powder (LS) is a new environmentally-friendly concrete admixture, and its application in concrete engineering is worth exploring. The curing of LS hydraulic concrete under extreme temperatures will significantly affect the interior microstructure of concrete, which has a significant impact on the resistance to freeze-thaw cycles. This stu...

This work assessed the effect of compressive fatigue on sulfate ion diffusion in standard-cured and steam-cured concrete containing slag. After compressive fatigue, the slag concretes were immersed in 5% sodium sulfate solution for 18 months. The sulfate ion content in concrete was measured and the sulfate ion effective diffusion coefficient was ca...

This work investigated the influence of polyacrylamide on carbonation behaviors of cement pastes by measuring carbonation depth and pH value. Electrochemical impedance spectroscopy, X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, and mercury intrusion porosimetry were performed to monitor changes in hydrates and microst...

Long-term corrosion behavior of a Cr-bearing low-alloy (LA) steel with different surface conditions (as-received, pickled and pre-rusted) in concrete when partially exposed to 3.5 wt% NaCl solution was measured using electrochemical impedance spectroscopy during the 8-year exposure period. According to the results of BSE/EDS elemental mapping, FT-I...

Dredged sediment (DS) derived from dredging operations poses a potential threat to the ecological environment. The proper disposal and utilization of DS remains a challenge. In this study, magnesium oxychloride cement (MOC) was adopted as a sustainable carrier for effective recycling of DS. MOC pastes incorporated with DS or calcined dredged sedime...

Recycling of dredged sediment (DS), derived from the routine dredging operation of rivers, lakes and seas, into construction materials represents an eco-friendly way to alleviate the burden on the environment. At higher incorporation dosages, however, DS causes a dramatic reduction in the mechanical properties of the host materials, which greatly s...

The most significant component of metallic corrosion control in aqueous conditions is examining the adsorption mechanisms of inhibitor molecules at the metal-electrolyte interface. The use of computational techniques for metal corrosion inhibition research has progressively increased due to time, economic, and environmental constraints, and the ina...

In this study, an ultrasound-assisted enzymatic extraction (UEE) method was proposed to augment the anti-corrosion performance of the green inhibitor extracted from waste Platanus acerifolia leaves. Chemical compositions and anticorrosive properties of UEE extract were characterized via multiple technologies. The adsorption film on the steel surfac...

Microbial induced corrosion (MIC) is an increasing challenge in concrete wastewater conveyance systems. Preventing MIC usually requires a corrosion-resistant chemical/antibacterial coating on cement-based materials. This study investigated the effects of electroless plating time and temperature on the preparation of the Cu-plated hardened cement pa...

This paper systematically investigated the influence of lithium citrate on the properties of cement. Its effect on hydration heat and internal pore structures was examined by isothermal calorimeter and mercury intrusion porosimetry (MIP) analysis, respectively. The evolution of hydration products and changes of the ion concentration in the pore sol...

This paper studied the influence of ultrasound on chloride release from cementitious materials. Results showed that ultrasound power enhanced both equilibrium point and chloride release rate, while ultrasound frequency mainly promoted the release rate. Kinetics analysis demonstrated that chloride release was controlled by the chemical reaction step...

The effect of limestone powder addition on the chloride binding capacity of concrete was evaluated. The results indicate that the chloride binding capacity becomes weaker as the limestone content increases due to decreased physical adsorption and chemical binding. XRD patterns indicate that adding limestone restrains the formation of monosulfate (A...

This work aims to shed new light on the evolution of passivation and chloride-induced corrosion behavior of a high-strength prestressing steel affected by stray current and silicate ions in alkaline solutions simulating the concrete interstitial electrolyte. A thinner and less stable steel passive film was formed due to the stray current interferen...

Calcium formate has been widely added in concrete as an accelerator to obtain a high early strength in civil engineering, such as shotcrete and concrete repairment. However, its effect on chloride ion erosion and steel bar corrosion under marine environments is elusive. In this study, rapid chloride migration and chloride ion titration methods were...

As one of the frontier technologies in anti-corrosion field, microcapsule inhibitors still have some limitations, e. g., costly and environmental-harmfully for achieving the trigger function. This necessitates further development of some eco-friendly, cost-effective and high-efficient trigger measures to promote the application possibilities of thi...

This study investigates the early mechanical strength, and shrinkage crack resistance of ultra‐high molecular weight polyethylene (UHMWPE) fiber concrete with different lengths and contents. The microstructure of UHMWPE fiber concrete is investigated by scanning electronic microscope (SEM) to analyze the distribution and mechanism of action of UHMW...

In this paper, the effects of graphene content, water-to-binder ratio (w/b) and curing age on the conductivity of magnesium sulfate cement were evaluated. Besides, the enhancement and conductivity mechanism of graphene was analyzed by means of electrochemical impedance spectroscopy (EIS) technique and scanning electron microscopy (SEM). As a result...

The electrical conductivity of graphene/cement composite before and after carbonation was tested by a four-electrode method. The General Effective Media equation was adopted to fit the experiment results. EIS (electrochemical impedance spectroscopy) was employed to study the effect of carbonation on conductivity of graphene/cement composite. The me...

The durability of reinforced concrete structures in subway engineering is a continuing concern due to the long-term complications associated with the coexistence of sulfate, chloride and electric field. However, there remain challenges towards better characterizing the changes in the mechanical and durability of the influenced structures. In this s...

The generation of dredged sediments (DS) exerts a heavy burden on the surrounding environment. Traditional landfills of DS not only contaminate the environment, but also waste precious resources. In this study, DS from Taihu Lake, together with calcium carbide slag (CCS) and ground granulated blast-furnace slag (GGBS), was used as supplementary cem...