Characterization of the Initial Hydration Process of Ordinary Portland Cement Based on Low-Field NMR

Huo, Jin-hua; Peng, Zhigang; Ye, Zhongbin; Feng, Qian; Zheng, Yong; Zhang, Jian

doi:10.1007/s00723-018-1054-6

Cited by 3 publications

(1 citation statement)

References 21 publications

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“…Thus, in this study, the initial hydration process (0–48 h) of cement slurry with or without retarder Poly‐AAMD was studied by using a PQ‐001 Low‐Field NMR, the T 2 value of cement slurry was tested by means of the CPMG sequence. Besides, the more details about the method of low‐field NMR are listed in our previous articles 19 …”

Section: Methodsmentioning

confidence: 99%

Preparation, characterization, and retarding mechanism of high temperature resistant amphoteric ion polymer oil well cement retarderPoly‐AAMDforHTHPapplication

Jinhua,

Xing,

Junwei

et al. 2023

J of Applied Polymer Sci

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The amphoteric ion polymer cement retarder Poly‐AAMD was synthesized by aqueous solution polymerization, the chemical structure, molecular weight, and thermal stability was studied. As a result, the Mn and Mw are 1.3 × 104 and 4.7 × 104 g/mol, respectively, and the initial decomposition temperature is 260°C. Then, the effects of retarder Poly‐AAMD on the application performance of cement slurry, such as settlement stability, thickening time, compressive strength, and rheological properties, were investigated. Especially, the thickening time of cement slurry with 1.2 and 1.5 wt% retarder Poly‐AAMD is 312 and 316 min at 220°C, the compressive strength is larger than 14 MPa at 24 h. Compared to conventional retarders, the temperature resistance has been improved to 220°C. Simultaneously, the initial hydration process of cement slurry was studied by low field NMR based on the T2 value. Moreover, the hydration products of cement slurry with retarder Poly‐AAMD were analyzed depends on the qualitative and quantitative analysis methods, the type and content of hydration products were confirmed by the methods of X‐ray diffraction analysis (XRD), scanning electron microscope (SEM), thermogravimetric analysis (TG), and differential thermal analysis (DTG). Finally, the retarding mechanism of retarder Poly‐AAMD was further studied depends on the results of adsorption amount and Zeta potential.

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Section: Methodsmentioning

confidence: 99%

Preparation, characterization, and retarding mechanism of high temperature resistant amphoteric ion polymer oil well cement retarderPoly‐AAMDforHTHPapplication

Jinhua,

Xing,

Junwei

et al. 2023

J of Applied Polymer Sci

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Nuclear spin relaxation

Kowalewski¹

2020

Nuclear Magnetic Resonance

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The review covers the progress in the field of NMR relaxation in fluids primarily during 2019. Since the topic is returning to this volume SPR after a break of a few years, some highlights of the relaxation literature from the period 2014–18 are mentioned. The emphasis is on comparatively simple liquids and solutions of physico-chemical and chemical interest, as in previous periods, but selected biophysics-related topics (including some work on relaxation in solid biomaterials) and relaxation-related studies on more complex systems (macromolecular solutions, liquid crystalline systems, glassy and porous materials) are also covered. Section 2 of the chapter is concerned with general, physical and experimental aspects of nuclear spin relaxation, while Section 3 is concentrated on applications.

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Effects of nano-C-S-H seed crystal on early-age hydration process of Portland cement

Liao

2021

Fullerenes, Nanotubes and Carbon Nanostructures

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Characterization of the Initial Hydration Process of Ordinary Portland Cement Based on Low-Field NMR

Cited by 3 publications

References 21 publications

Preparation, characterization, and retarding mechanism of high temperature resistant amphoteric ion polymer oil well cement retarderPoly‐AAMDforHTHPapplication

Preparation, characterization, and retarding mechanism of high temperature resistant amphoteric ion polymer oil well cement retarderPoly‐AAMDforHTHPapplication

Nuclear spin relaxation

Effects of nano-C-S-H seed crystal on early-age hydration process of Portland cement

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