Xiaoying Pan
Hunan University
DurabilityAir permeability specific surfaceCarbonationMortarCuring (chemistry)Composite materialFourier transform infrared spectroscopyAbsorption of waterInorganic chemistryShrinkagePermeability (earth sciences)Materials scienceSurface layerScanning electron microscopeSodium fluorosilicateCalcium carbonateLimeChlorideSilica gelCalcium hydroxideCalcium silicate hydrateSodium silicatePortland cementCompressive strengthChemical engineeringAggregate (composite)CementEnvironmental scanning electron microscopeThermogravimetric analysisPorosityFly ashMicrostructure
13Publications
11H-index
498Citations
Publications 13
Newest
#1Yue Wang (Hunan University)
#2Bao Lu (Hunan University)H-Index: 4
Last. Moncef L. Nehdi (UWO: University of Western Ontario)H-Index: 53
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Abstract null null Permeability is an important indicator of the durability of cement-based materials. Surface treatments are effective in reducing permeability, and thus improving durability. In this study, CO2 surface treatment, as a new method, was investigated explore the efficiency on cement-fly ash-slag ternary concrete. The results show that the CO2 surface treatment densified surface microstructure and reduced both air and water permeability of concrete. With increase in fly ash and slag...
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#1Xiaoying Pan (Hunan University)H-Index: 11
#2Caijun Shi (Hunan University)H-Index: 73
Last. Xiang Hu (Hunan University)H-Index: 11
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Abstract Previous study has shown that CO2 surface treatment can provide significant protective effects on cement mortar at early ages. This study examines the compressive strength, water permeability, water-vapor transmission and chloride migration of mortars after CO2 surface treatment with subsequent lime water curing. Thermogravimetric analysis (TGA), Fourier Transform Infrared Spectroscopy (FTIR), and Environmental Scanning Electron Microscope (ESEM) combined with Energy Dispersive X-ray Sp...
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#1Caijun ShiH-Index: 3
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#1Xiaoying Pan (Hunan University)H-Index: 11
#2Caijun Shi (Hunan University)H-Index: 73
Last. Linlin Chong (Hunan University)H-Index: 6
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Abstract Surface treatment is a simple way to improve quality of surface of cement-based materials and thus increase the resistance of cement-based materials to environmental aggressions. Magnesium fluorosilicate, waterglass, sodium fluorosilicate, and combination of waterglass and sodium fluorosilicate were used as surface treatment agents. Their effects on compressive strength, surface hardness and resistance to carbonation were studied. The experimental results indicated that magnesium fluoro...
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#1Xiaoying Pan (Hunan University)H-Index: 11
#2Caijun Shi (Hunan University)H-Index: 73
Last. Zhihua Ou (Hunan University of Technology)H-Index: 8
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Abstract Many of the degradation problems of concrete can be attributed to the weak surface layer. Surface treatment of concrete has been proven a simple and effective method to enhance the durability of concrete. In the present study, two series of portland cement mortar specimens with w/c ratios of 0.4 and 0.3 were prepared. CO 2 treatment was applied to he mortars 24 h after casting. The results indicated that CO 2 treatment resulted a carbonated a layer of less than 1.6 mm in thickness, slig...
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#1Xiaoying Pan (Hunan University)H-Index: 11
#2Zhenguo Shi (AU: Aarhus University)H-Index: 20
Last. Ning Li (Hunan University)H-Index: 12
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There are variety of surface treatments used for concrete structures protection. This paper presents a review of the effect of surface treatments on mechanical properties and durability concrete, and the durability of treatment materials themselves. Several common surface treatment are reviewed, including acrylic coating, polyurethane coating, epoxy coating, silanes, siloxanes sodium silicate, and nano-SiO2. These surface treatments showed different impacts on physical and mechanical properties,...
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#1Xiaoying Pan (Hunan University)H-Index: 11
#2Zhenguo Shi (AU: Aarhus University)H-Index: 20
Last. Ning Li (Hunan University)H-Index: 12
view all 5 authors...
Abstract The application of surface treatments in concrete has been widely investigated over the past decades. Surface treatment technology has become more important in concrete structures especially in preventing deterioration and damage when exposed to extremely aggressive environments, and in further extending service life. This paper presents comprehensive details of four types of concrete treatments, including surface coating, hydrophobic impregnation, pore blocking surface treatment and mu...
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#1Dehui WangH-Index: 14
#2Caijun ShiH-Index: 73
Last. Xiaoying PanH-Index: 11
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In this paper, the flowability, compressive strength, hydration heat, porosity and calcium hydroxide content of cement–silica fume–fly ash-based ultra-high-strength concrete (UHSC) incorporating either nano-silica (SiO2) or nano-calcium carbonate (CaCO3) were investigated. Test results showed that the flowability of UHSC was reduced by incorporating nano-silica and nano-calcium carbonate. After incorporating nano-silica, the hydration heat flow of UHSC increased, and the hydration heat of UHSC i...
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#1Xiaoying Pan (Hunan University)H-Index: 11
#2Zhenguo Shi (AU: Aarhus University)H-Index: 20
Last. Linmei Wu (Hunan University)H-Index: 11
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Abstract Magnesium fluorosilicate, waterglass, sodium fluorosilicate, and combination of waterglass and sodium fluorosilicate were used as surface treatment agents and their interactions with the Portland cement hydrates were studied. Thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FT-IR) were employed to analyze the phase changes in the hardened cement pastes after surface treatments. A scanning electron microscope (SEM) with energy dispersive X-ray spectroscopy (E...
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#1Xiaoying Pan (Hunan University)H-Index: 11
#2Caijun Shi (Hunan University)H-Index: 73
Last. Linmei Wu (Hunan University)H-Index: 11
view all 5 authors...
AbstractPermeability is an important indicator of durability of cement-based materials. Surface treatment is a simple method to reduce the permeability of cement-based materials. This paper evaluates the air permeability of cement-based materials treated with fluosilicate and sodium silicate. An air permeability test was utilized to measure permeability. The results revealed that both fluosilicate and sodium silicate could effectively reduce the air permeability of concrete. The benefits of magn...
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