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Portland Cement Hydration Behavior at Low Temperatures

Portland Cement Hydration Behavior at Low Temperatures

Portland Cement Hydration Behavior at Low Temperatures ...

Portland Cement Hydration Behavior at Low Temperatures: Views from Calculation and Experimental Study ZhuangzhuangLiu, 1,2 WenxiuJiao, 2 AiminSha, 1,2 JieGao, 2

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Portland Cement Hydration Behavior at Low Temperatures: Views from Calculation and Experimental Study September 2017 Advances in Materials Science and Engineering 2017:1-9

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Portland Cement Hydration Behavior at Low Temperatures: Views from Calculation and Experimental Study Figure 10 Relationships between strength, hydrates, and temperature.

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Portland Cement Hydration Behavior at Low Temperatures ...

Portland Cement Hydration Behavior at Low Temperatures: Views from Calculation and Experimental Study Figure 10 Relationships between strength, hydrates, and temperature.

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Portland Cement Hydration Behavior at Low Temperatures ...

Portland Cement Hydration Behavior at Low Temperatures: Views from Calculation and Experimental Study Figure 3 Electrical resistivity of Portland cement during hydration: five stages of Portland cement hydration according to [ 19 ].

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A laboratory study of Portland cement hydration under low ...

To this end, a lot of studies were conducted to learn the Portland cement hydration under low temperatures [10,11,[15][16] [17] [18], even though there is still lack of understanding in depth to ...

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Portland Cement Hydration Behavior at Low Temperatures ...

Portland Cement Hydration Behavior at Low Temperatures: Views from Calculation and Experimental Study By Zhuangzhuang Liu, Wenxiu Jiao, Aimin Sha, Jie Gao, Zhenqiang Han and Wei Xu Get PDF (0 MB)

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Effect of pozzolans on the hydration process of Portland ...

Sep 01, 2013  The low curing temperature affects the hydration of Portland cement directly and, consequently, the pozzolanic reaction that occurs in blended Portland cements. The delay in the process of Portland cement hydration at low temperatures affects the production of portlandite directly and, consequently, the pozzolanic reaction may be modified in ...

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Preparation, properties and hydration process of low ...

Apr 30, 2019  The low temperature hydration process of NC was discussed after analysis of hydration heat release behavior, hydration products and microstructure of cement stone. The low temperature hydration model of NC is demonstrated as shown in Fig. 10 below. Download : Download high-res image (195KB) Download : Download full-size image; Fig. 10.

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Nondestructive monitoring on hydration behavior of cement ...

Jul 20, 2021  Therefore, current methods mainly allow the characterization of hydration behavior of cement at a hydration stage. A nondestructive and continuous testing method is necessary to investigate the hydration process of cement. Electrochemical impedance spectroscopy (EIS) has the advantages of high sensitive, low-cost, and easy to operate.

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Hydration behavior of calcium aluminate cement mortars ...

May 24, 2021  Cement-based materials that are produced with calcium aluminate cement (CAC) exhibit severe strength losses with time and temperature due to the conversion of metastable hydrates (CAH 10 and C 2 AH 8) into the stable hydrates (C 3 AH 6 and AH 3).On the other hand, using mineral admixtures at different ratios during the production of cement-based materials change the hydration behavior

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Soriano Martinez, L.; Monzó Balbuena, JM.; Bonilla ...

5º C as the minimum temperature to be mixed in cold weather, since at low temperatures the cement hydration is delayed. Besides at temperatures below 0º C, mortars and concretes can experience problems because of freezing water. Several examples [3-11] about the influence of temperature and curing time of concrete and mortar have been reported.

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Hydration of Portland cement accelerated by C-S-H seeds at ...

Mar 01, 2020  Typical oil well conditions present elevated temperatures; nevertheless, is not clear how such temperatures affect the nucleation process induced by these seeds. In this work, class G cement pastes were blended with up to 5.0% of C-S-H seeds and cured at 25, 40 and 60 °C. Hydration kinetics results showed that the nucleation effect from C-S-H ...

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Kinetic and thermodynamic modeling of Portland cement ...

Jan 12, 2017  Portland cement have to hydrate in cold climates in some particular conditions. Therefore, a better understanding of cement hydration under low temperatures would benefit the cement-based composites application. In this study, Portland cement was, therefore, kinetically and thermodynamically simulated based on a simple kinetics model and minimization of Gibbs free energy.

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2017年实验室部分SCI收录论文 - chd.cn

Portland Cement Hydration Behavior at Low Temperatures: Views from Calculation and Experimental Study. A laboratory study of Portland cement hydration under low temperatures. Kinetic and thermodynamic modeling of Portland cement hydration at low temperatures. A review of water transport in dense-graded asphalt mixtures

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Microstructure characterization of Portland cement pastes ...

Dec 10, 2019  In this study, the microstructure characterization during hydration behavior of Portland cement under applied low atmospheric pressures, i.e., 0.2, 0.5, 0.8, 0.9 times of 1.0 atmospheric pressure (P 0), was experimentally investigated using X-Ray diffraction (XRD), thermogravimetric analysis (TGA), and low temperature nitrogen adsorption ...

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1. Introduction - Hindawi

Better understanding of Portland cement hydration can absolutely promote the performance of cement composites under low temperatures, especially for the application at cold climates. Thus, this study aims to investigate the hydration process of Portland cement, including hydrates, microstructures, and mechanical behavior evolution.

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Portland Cement Hydration Behavior at Low Temperatures ...

Portland Cement Hydration Behavior at Low Temperatures: Views from Calculation and Experimental Study Figure 10 Relationships between strength, hydrates, and temperature.

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Portland Cement Hydration Behavior at Low Temperatures ...

Portland Cement Hydration Behavior at Low Temperatures: Views from Calculation and Experimental Study Figure 3 Electrical resistivity of Portland cement during hydration: five stages of Portland cement hydration according to [ 19 ].

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Initial understanding of Portland cement hydration under ...

Experiment result (i.e., DoH and electrical resistivity) indicated that the hydration of Portland cement was delayed by low temperature without hydration stopping at −5°C.

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Portland Cement Hydration Behavior at Low Temperatures ...

Portland Cement Hydration Behavior at Low Temperatures: Views from Calculation and Experimental Study By Zhuangzhuang Liu, Wenxiu Jiao, Aimin Sha, Jie Gao, Zhenqiang Han and Wei Xu Get PDF (0 MB)

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Effect of pozzolans on the hydration process of Portland ...

The effect of metakaolin on the hydration process of portland cement cured at low temperatures of 5--20°C for 3-28 days was studied by the thermogravimetric analysis [17]. The hydration products ...

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Portland Cement, Concrete, Volume 18/Number 2 and Heat

Portland Cement, Concrete, and the Heat of Hydration Cement on the Go Portland Cement, Concrete, and Heat of Hydration Fig.1 demonstrates the effect of element size on concrete tempera-ture with time due to the heat of hydration. Temperature rises of 55°C (100°F) have been observed with high ce-ment content mixes.(2) These tem-

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How to manage heat of hydration in concrete - civilMedium

Feb 25, 2021  C 2 S on the other hand hydrates at a little low rate and continues to keep increasing the temperature. This makes the hydration last long few days keeping the internal heat at the peak for some time. The behavior of the hydration temperature clearly shows the effect of chemical compounds on the hydration heat of cement.

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2017年实验室部分SCI收录论文 - chd.cn

Portland Cement Hydration Behavior at Low Temperatures: Views from Calculation and Experimental Study. A laboratory study of Portland cement hydration under low temperatures. Kinetic and thermodynamic modeling of Portland cement hydration at low temperatures. A review of water transport in dense-graded asphalt mixtures

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Cold Weather Concreting - Portland Cement Association

Concrete can be placed in cold weather conditions provided adequate precautions are taken to alleviate the negative impacts of low ambient temperatures. The current American Concrete Institute (ACI) definition of cold-weather concreting, as stated in ACI 306 is, “a period when for more than three successive days the average daily air ...

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Nondestructive monitoring on hydration behavior of cement ...

Jul 20, 2021  Therefore, current methods mainly allow the characterization of hydration behavior of cement at a hydration stage. A nondestructive and continuous testing method is necessary to investigate the hydration process of cement. Electrochemical impedance spectroscopy (EIS) has the advantages of high sensitive, low-cost, and easy to operate.

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Investigation of Portland Cement Concrete Hydration ...

Investigation of Portland Cement Concrete Hydration Behavior at Its Early Age Using Embedded Fiber Optic Temperature Sensors BY ALICE CHAO Bachelor of Science, University of Massachusetts Lowell SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING

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Acceleration and Retardation of Portland Cement

made the drying at low temperatures impossible. Therefore only the curve sections above 400 C were evaluated. The figures in Table 3 give the percentages of CaO formed during hydration, as calculated from weight loss curves by the method described. The free CaO content of the portland cement (0. 13%) and of the synthetic silicate (0. 38%) was

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Hydration Kinetics of Portland Cement–Silica Fume Binary ...

Nov 26, 2019  the hydration degree of the Portland cement–silica fume cementing material. Especially, the obtained parameters from the model specifically reflected the hydration stages of cementitious cement at low temperature, which could lay a theoretical foundation for the hydration research of low temperature

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(PDF) Effect of fly ash on the kinetics of Portland cement ...

31 5. Conclusions In this paper, the effect of fly ash on the hydration kinetics of Portland cement in fly ash – Portland cement mixtures of low w/b ratios were studied at three curing temperatures. The shrinking-core model was used in a modified form in quantifying the kinetics parameters of the cement hydration.

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