Hongyan Ma

Hongyan Ma
Missouri University of Science and Technology | Missouri S&T · Department of Civil Engineering

PhD

About

121
Publications
93,925
Reads
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4,130
Citations
Citations since 2016
82 Research Items
3905 Citations
20162017201820192020202120220200400600800
20162017201820192020202120220200400600800
20162017201820192020202120220200400600800
20162017201820192020202120220200400600800
Additional affiliations
October 2015 - present
Missouri University of Science and Technology
Position
  • Professor (Assistant)
March 2013 - October 2015
The Hong Kong University of Science and Technology
Position
  • PostDoc Position
Description
  • Deputy Principal Investigator of HKITF project ITP/033/12NP; Teaching substitute staff for Advanced Concrete Technology.
September 2008 - June 2012
The Hong Kong University of Science and Technology
Position
  • Research Assistant
Description
  • Teaching Assistant for Surveying and Surveying Camp, Structural Analysis, Construction Materials, and Civil Engineering Drawing (AutoCAD 2012)

Publications

Publications (121)
Article
Studies on pore structure are essential to better understand the transport properties and durability of cement based materials. In this study, a two-scale modeling framework is proposed to simulate the capillary pore network in hydrated cement paste. Capillary pores are divided into small capillary pores (SCPs) and large capillary pores (LCPs). It...
Article
Full-text available
Interfacial transition zone (ITZ) has long been of particular interest in concrete technology. The limited sensitivity of experimental techniques makes it attractive to study ITZ using computer simulations. In this paper, a multi-aggregate approach is proposed to simulate the formation of ITZ in concrete. In light of a modified status-oriented comp...
Article
Full-text available
Mercury intrusion porosimetry (MIP) has been widely used to investigate the pore structure of cement based materials for many years. The purpose of this paper is to present views of how to make MIP results of similar materials from different research institutes compatible and how to use MIP results in modeling. Factors that influence MIP results ar...
Article
Full-text available
In this study, the pore structure of Portland cement paste is experimentally characterized by MIP (mercury intrusion porosimetry) and nitrogen adsorption, and simulated by a newly developed status-oriented computer model. Cement pastes with w/c=0.3, 0.4 and 0.5 at ages from 1 day to 120 days are comprehensively investigated. It is found that MIP ca...
Article
Copper slag (CS), a by-product of copper smelting, is normally stockpiled, leading to wastes of resource and space as well as environment pollution. It has not been massively reutilized as a supplementary cementitious material in Portland cement due to its low reactivity. In the present study, CS is for the first time utilized as the base component...
Article
In the present study, steel slag powder (SSP) was utilized as the raw material to prepare iron-calcium phosphate cement (ICPC) by reacting with ammonium dihydrogen phosphate (ADP). The influences of the raw materials (SSP/ADP) mass ratios ranging from 2.0 to 7.0 on the properties and microstructures of ICPC pastes were investigated. The compressive...
Conference Paper
Wellbore integrity to ensure efficient, economical, and environmentally friendly operations is a significant and fundamental challenge for CO2 sequestration wells. The carbonation reaction between Portland cement and CO2 can change the microstructure of the cement skeleton, change the cement mechanical properties, damage the annular seal, and final...
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Electric furnace ferronickel slag (EFS) is a typical magnesium-rich industrial by-product discharged from the manufacture of nickel and iron-nickel alloys. The approach to use it as the raw material for the preparation of magnesium phosphate cement (MPC) has potential and proves effective. In this study, three different phosphorus sources (PS) incl...
Article
The addition of nanomodifiers is an effective method to improve the performance of cementitious materials. However, the strengthening mechanism is still not fully understood. Molecular dynamics (MD) simulation is an effective research tool that makes it possible to understand the genome of cement-based materials and, thus, their interactions with n...
Article
Chloride-induced steel corrosion seriously affects the durability of reinforced concrete structures. Rubber concrete, an environmentally friendly construction material in which waste rubber is recycled as a concrete component, has demonstrated superior resistance to chloride-induced steel corrosion and the subsequent concrete deterioration. However...
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Setting times, as the early-age properties of cement-based materials, are important properties to ensure the quality and long-term performance of engineering structures. To determine the initial and final setting times of cementitious materials, the compressive wave velocity and shear wave velocity of six early-age mortar samples were monitored. Th...
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The workability mechanism of fresh concrete at the molecular level remains essentially unexplored. To understand the molecular origin for cement fluidity, molecular dynamics and Density Function Theory (DFT) were utilized to construct a shear model of Calcium-Silicate-Hydrate (C-S-H) layers. The structure, dynamics, and reactivity of ultra-confined...
Article
The transport properties of water and ions play a key role in the durability of cement-based materials. However, little work has been done to study the diffusion behaviors of water and ions in a multi-scale view. Therefore, the current paper presented a multi-scale molecular dynamics fed random walk (MD-RW) simulation scheme for the purpose of obta...
Article
This study investigated the influence of limestone (LS) and calcium sulfate (C$) mineral additives on the hydration kinetics of high-α-Al2O3 calcium aluminate cement (CAC) utilizing experimental techniques and thermodynamic simulations. Increasing the replacement level of limestone or calcium sulfate increased the cumulative heat of the hydration r...
Conference Paper
Cement sheath integrity is a critical part of maintaining wellbore integrity during the wellbore lifecycle and needs to be thoroughly investigated under representative downhole conditions. This paper utilizes an integrated experimental and numerical approach to investigate the cement hardening process and evaluate the severity of wellbore damage un...
Article
An image-based multi-level modeling method is proposed to estimate the effective bulk thermal conductivity of lightweight aggregate (LWA) impregnated with phase change material (PCM). The pore structure heterogeneity of the LWA and the uneven distribution of the PCM are considered by the model. The microstructure of the LWA is represented at two le...
Article
The production of ordinary Portland cement (OPC), the most broadly utilized man-made material, has been scrutinized due to its contributions to global anthropogenic CO2 emissions. Thus — to mitigate CO2 emissions — mineral additives have been promulgated as partial replacements for OPC. However, additives — depending on their physiochemical charact...
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Microbially precipitated calcium carbonate (CaCO3) has drawn broad attention due to its potential applications in various areas, for example, biocementation, medicine, and soil reinforcement. Sporosarcina pasteurii (S. pasteurii), formerly known as Bacillus pasteurii, has been investigated for CaCO3 biomineralization due to its high ureolytic activ...
Article
Recycled aggregate concrete (RAC) has recently been a good alternative to natural aggregate concrete (NAC) because of the increased focus on sustainability in the construction industry. However, RAC has a great number of defects in comparison to NAC, such as lower strength and higher water absorption. In order to solve these disadvantages, many res...
Article
In this study, the effects of phase change material (PCM) on the thermo-mechanical behaviors of concrete pavement slabs are investigated so as to test the feasibility of utilizing PCM for mitigation of thermal curling of pavement. The PCM is elaborately stabilized in porous lightweight aggregate then loaded into concrete, without compromising stren...
Article
Full-text available
Carbonaceous (e.g., limestone) and aluminosilicate (e.g., calcined clay) mineral additives are routinely used to partially replace ordinary portland cement in concrete to alleviate its energy impact and carbon footprint. These mineral additives—depending on their physicochemical characteristics—alter the hydration behavior of cement; which, in turn...
Article
The hydration of the two most reactive phases of ordinary Portland cement (OPC), tricalcium silicate (C3S), and tricalcium aluminate (C3A) is successfully halted when the activity of water () falls below critical thresholds of 0.70 and 0.45, respectively. It has been established that the reduction in relative humidity (RH) and suppresses the hydrat...
Article
This study presents a statistical design method in developing magnesium phosphate cement (MPC) -based material for rapid-repair. Specifically, an optimization model considering the relationship between variables (the water-to-binder ratio, the magnesia-to-phosphate ratio, and the borax content) and responses (the setting time and the early-age comp...
Article
The apparent surface chloride concentration (Cs) of marine concrete is a key parameter in durability design. Based on data in the literature, this study aims to analyze the influences of data acquisition and processing to Cs, including measurement methods of chloride concentration in concrete powder samples, the processing strategy for the thicknes...
Article
The performance of adsorbents prepared by alkali activation of high calcium fly ash was investigated for removing aqueous Zn. Two formulations involving the use of NaOH and Na2SiO3 activating solutions were used to prepare the adsorbents that feature different microstructural characteristics. The Zn sorption data indicates a sorption process that i...
Article
Microcrystalline zeolites of the gismondine family are often reported in alkali‐activated and blended cement systems. However, little is known about gismondine’s compatibility with other cementitious phases to determine stability in long‐term phase assemblage. Experimental studies were conducted to investigate the compositional field of gismondine...
Article
In this study, an experimental investigation was conducted to determine the triaxial tensile-compressive-compressive (T–C–C) behavior of three different high-performance concrete (HPC) groups with uniaxial compressive strength ranging from 44 to 90 MPa, using servo-hydraulic actuators. In the experimental program, seventeen stress ratios for each b...
Article
Ferrous oxalate cement (FOC), a new type of acid‐base cement, is prepared at room temperature through reactions between iron‐rich copper slag (CS) and oxalic acid (OA). In this work, the influences of precursor proportions, including the copper slag‐to‐oxalic acid mass ratio (CS/OA), borax‐to‐cement mass ratio (B/C), and water‐to‐cement mass ratio...
Article
Recycling of waste rubber into concrete is one of the most efficacious and environmentally-friendly methods to solve the so-called black pollution. However, the incorporation of waste rubber particles reduces the mechanical properties of concrete, resulting from the low stiffness of the rubber particles as well as the insufficient adhesion energy b...
Article
Full-text available
In this study, hyperspectral imagery with two computational algorithms are proposed to classify the type of mortar and assess the in-situ strength of fresh mortar in near real time. Each scanning on a mortar surface includes 30 spatial pixels selected for analysis, each assigned with a light reflectance spectrum over 400–2500 nm. Three groups of mo...
Article
Full-text available
In this paper, a two-step model is proposed to predict the effective chloride diffusivity of cement paste and cement mortar. The prediction effective chloride diffusivity results of cement paste and cement mortar are compared with two different experimental method results. In the two-step model, the effective chloride diffusivity of cement paste is...
Article
This study aims to evaluate the potential of sugarcane bagasse ash (SCBA) as a supplementary cementitious material (SCM) in terms of composition. Using coal-combustion fly ash (CFA) as the benchmark, SCBA is characterized thoroughly using multiple tools to determine and compare particle size, particle morphology, chemical composition, glass content...
Article
Full-text available
An intellectual system is developed to monitor concrete pavement slab subjected to external temperature fluctuations. Truly distributed fiber-optic temperature and strain sensors and an innovative Fabry-Perot interferometer-based optical fiber inclinometer are installed in the concrete pavement slab so as to monitor and evaluate its thermal curling...
Article
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Limestone calcined clay cement (LC3) – consisting of Portland cement (OPC) clinker, calcined clay, limestone powder and gypsum – has been considered a promising solution to current challenges in the cement and concrete industry, such as high carbon emissions, high energy consumption, and resource shortages. This study carries out a series of experi...
Article
Full-text available
This paper develops and employs an ensemble machine learning (ML) model for prediction of surface chloride concentration (Cs) of concrete, which is an essential parameter for durability design and service life prediction of concrete structures in marine environment. For this purpose, a database containing 642 data-records of field exposure data of...
Article
Calcium sulfoaluminate cement (CSAC), first developed in China in the 1970s, has received significant attention because of its expansive (or shrinkage-compensating) and rapid-hardening characteristics, low energy-intensity, and low carbon emissions. The production and hydration of CSAC (containing ye’elimite, belite, calcium sulfate, and minors) ha...
Article
The hydration of tricalcium silicate (C3S) – the major phase in cement – is effectively arrested when the activity of water (aH) decreases below the critical value of 0.70. While it is implicitly understood that reduction in aH suppresses the hydration of tricalcium aluminate (C3A: the most reactive phase in cement), the dependence of kinetics of C...
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Full-text available
h i g h l i g h t s MPC early performance optimization statistical model has been developed via RSM. The effect of w/b, B/M and M/P on the early-age properties has been investigated. Experimental verification results show the effectiveness of RSM in MPC design. The MPC paste has the excellent performance in the repairing of subway segment. g r a p...
Article
This work aims to investigate the mechanical properties and crack propagation of cement paste at the micro-level. For this purpose, the peridynamic (PD) method is utilized for the first time to solve the problems of discontinuity in the microstructure of cement paste, such as initiation and propagation of cracks. The effects of various factors on t...
Article
Full-text available
This paper presents an innovative concept of multifunctional lightweight aggregate, which is produced by loading phase change material (PCM) into the interior of lightweight sand (LWS) and sealing the surface pores using water. The PCM loaded in the LWS functionalizes it as a temperature management agent in concrete, and the water in surface pores...
Article
Early‐age hydration of cement is enhanced by slightly‐soluble mineral additives (i.e., fillers, such as quartz and limestone). However, few studies have attempted to systematically compare the effects of different fillers on cementitious hydration rates, and none have quantified such effects using fillers with comparable, size‐classified particle s...
Article
The use of machine learning (ML) techniques to model quantitative composition–property relationships in concrete has received substantial attention in the past few years. This paper presents a novel hybrid ML model (RF-FFA) for prediction of compressive strength of concrete by combining the random forests (RF) model with the firefly algorithm (FFA)...
Article
With technological development, the cathode-ray tubes (CRTs)are being phased out and discarded. However, the discarded CRT is non-degradable, and the presence of lead in it may cause serious contamination to soil and water resources. As a sustainable method to recycle discarded CRT glass, we tested the discarded CRT glass powder (CGP)at up to 70% s...
Article
Full-text available
Determination of degrees of hydration/reaction of components of blended cementitious systems (i. e., cement and SCMs: supplementary cementitious materials) is essential to estimate the systems' properties. Although the best methods for determining degrees of reaction of different SCMs have been recommended by RILEM TC238, they rely on either expens...
Article
The focus of this study is to elucidate the role of particle size distribution (PSD) of metakaolin (MK) on hydration kinetics of tricalcium silicate (C3S‐T1) pastes. Investigations were carried out utilizing both physical experiments and phase boundary nucleation and growth (pBNG) simulations. [C3S + MK] pastes, prepared using 8%mass or 30%mass MK,...
Article
The durability of porous materials – especially when exposed to deleterious environs – depend on their permeability. This paper takes a closer look at the governing equations of fluid flow in porous media, and examines the role of particulate geometry on liquid water permeability of porous materials. A three dimensional (3D) microstructural model i...
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Full-text available
The early-age hydration of cement is inhibited in the presence of comb-shaped polycarboxylate ether (PCE) polymer—a dispersant commonly added to control rheological properties of fresh cement paste. This study employs a series of microcalorimetry experiments and phase boundary nucleation and growth simulations to elucidate the effects of dosage and...
Article
Full-text available
In this work, we report a comprehensive study on developing high performance magnesium phosphate cement (MPC) composite bipolar plates for fuel cells. The MPC composite bipolar plates composed of MPC with partial replacement of fly ash as the binding matrix phase and multiple carbon-based materials (including graphite, carbon fiber and multi-walled...
Article
Full-text available
The electrical resistivity of hardened cement-based materials was measured in this work by a modified noncontact electrical resistivity measurement (MN-CM). The resistivity was further processed to compute the chloride diffusion coefficient (D ρ) using the Nernst-Einstein equation. Also, the rapid chloride migration test (RCM) was carried out to ob...
Article
With technological development, the rapid growing numbers of electronic devices generate severe electromagnetic interference (EMI) and radiation to human environment. In this study, the coupling effect of graphene oxide (GO) addition (up to 0.10 wt.% of cement) and waste cathode-ray tube (CRT) glass replacement for fine aggregates (30 and 60 wt.%)...
Article
Highlights The range of small and large pores in LWSCC are different in other types of concrete. Fractal dimension is an accurate parameter to quantify the pore size distribution. The optimum amount of SF in LWSCC is 5%. The compressive strength and water penetration depth depends linearly on fractal dimension. Compressive strength has a better co...
Article
A strong nanocellular composite with stiff magnesium phosphate cement (MPC) particles and soft polyurea aerogel (PUA) has been synthesized and characterized. Utilizing the nano-confinement effect, the effective Young's modulus and the compressive strength of the ligaments are 8–10 times higher than those of PUA. Taking advantage of the hierarchical...
Article
Bipolar plates composed of magnesia phosphate cement composite were fabricated via hot-press assisted hydration process. Techniques, including open circuit potential-time, alternating current impedance, and linear sweep voltammetry, were applied to the bipolar plates to investigate their electrochemical properties through both single cell and fuel...