DataVXAdvances in Cement ResearchPaper
journal article·2021-01

Effect of red mud addition on oil well cement at high temperatures

Xiaowei Cheng, Xuezheng Yang, Chi Zhang, Xianshu Gao, Yongjin Yu, Kaiyuan Mei, Xiaoyang Guo, Chunmei Zhang

Advances in Cement Research· Volume 33· Issue 1
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Source abstract

Abstract

Red mud is a byproduct of the aluminium industry and is typically considered hazardous waste owing to its high alkali content and resulting environmental pollution. In this work, Bayer process red mud was used to partially replace oil well cement and its influence on the compressive strength of hardened cement pastes was explored under hydrothermal conditions. X-ray diffraction, scanning electron microscopy, nitrogen adsorption and thermal analysis were used to determine the phase composition, microscopic morphology, pore size distribution and bound water content, respectively, of hardened cement pastes to investigate the reasons underlying the observed strength change. The results obtained revealed that red mud can exert pozzolanic activity at addition levels of up to 5%, promote the cement hydration reaction and the production of calcium silicate hydrate (C–S–H), and ultimately increase the strength of hardened cement pastes. Higher red mud contents decreased the degree of cement hydration, which resulted in an increased volume of macropores (d > 50 nm), a decreased volume of mesopores (d = 4·5–50 nm) and a remarkably decreased strength.
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Research context

OpenAlex topics: Bauxite Residue and Utilization · Concrete and Cement Materials Research · Recycling and utilization of industrial and municipal waste in materials production

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

Affiliations

Professor, State Key Laboratory of Oil and Gas Reservoir Geology and Exploration, Southwest Petroleum University, Chengdu, P. R. China

School of Material Science and Engineering, Southwest Petroleum University, Chengdu, P. R. China (corresponding author: )

Master student, State Key Laboratory of Oil and Gas Reservoir Geology and Exploration, Southwest Petroleum University, Chengdu, P. R. China

School of Material Science and Engineering, Southwest Petroleum University, Chengdu, P. R. China

Engineer, China National Petroleum Corporation Engineering Technology R&D Co., Ltd, Beijing, P. R. China

Engineer, State Key Laboratory of Oil and Gas Reservoir Geology and Exploration, Southwest Petroleum University, Chengdu, P. R. China

China Building Materials Academy Co., Ltd., Beijing, P. R. China

Doctoral student, State Key Laboratory of Oil and Gas Reservoir Geology and Exploration, Southwest Petroleum University, Chengdu, P. R. China

Lecturer, School of Material Science and Engineering, Southwest Petroleum University, Chengdu, China

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