DataVXAdvances in Cement ResearchPaper
journal article·2023-09-01

Preparation of sustained-release-type citric-acid-intercalated hydrotalcite and its application in oil-well cement

Tianpeng Zuo, Sheng Huang, Chunmei Zhang, Tao Gu, Kaiqiang Liu, Xiaowei Cheng

Advances in Cement Research· Volume 35· Issue 9
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Source abstract

Abstract

To address the problems of poor thermal stability and over-retarding of cement slurry by retarders, as well as the sensitivity to citric acid (CA) dosage and poor early strength of cement treated with hydroxycarboxylic acid retarders, CA-intercalated magnesium aluminium hydrotalcite (Mg/Al-CA-LDH, henceforth called CAIH) with a sustained-release effect was prepared by an anion exchange reaction between CA and magnesium aluminium carbonate layered double hydroxide (Mg/Al-CO3-LDH). The prepared CAIH exhibited good crystallinity and high thermal stability, and 39.92% CA could be inserted in the composite. Evaluation of the thickening and compressive strength of oil-well cement showed that the addition of CAIH effectively maintained the fluidity of the cement slurry and improved its early compressive strength. Furthermore, because of the seed effect of hydrotalcite and the microrelease of CA in CAIH, the synergistic effect of hydrotalcite and CAIH can promote the setting of oil-well cement: the effect was stable and the thickening curve was stable, indicating right-angle thickening.
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Research context

Composites

OpenAlex topics: Layered Double Hydroxides Synthesis and Applications · Magnesium Oxide Properties and Applications · Concrete and Cement Materials Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

MSc student, School of New Energy and Material, Southwest Petroleum University, Chengdu, China

Doctor, Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China

Associate Professor, School of New Energy and Material, Southwest Petroleum University, Chengdu, China

Doctor, PetroChina Southwest Oil & Gas Field Company, Chengdu, Sichuan, China

Doctor, School of New Energy and Material, Southwest Petroleum University, Chengdu, China

Professor, School of New Energy and Material, Southwest Petroleum University, Chengdu, China; Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China (corresponding author: )

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