Effect of PCE modifying C-S-H on the properties of grouting material for offshore wind power (GMWP)

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2024-11-02 DOI:10.1016/j.conbuildmat.2024.138883

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引用次数: 0

Abstract

Nano-C-S-H-PCE exhibits a favorable influence on the early strength of cement; however, there is limited research available regarding the utilization of micron C-S-H-PCE as a grouting material for offshore wind power (GMWP) applications. This study aims to investigate the influence of micron C-S-H-PCE on the properties of grouting materials specifically designed for offshore wind power projects. Hydration kinetics, XRD, TG/DTG, BSE and SEM were used to analyze the heat of hydration, phase of hydration products and morphology of hydration products. The research shows that the early strength of grouting material for offshore wind power (GMWP) significantly increased before 24 h. And the compression strength is increased by 270 % after 14 h, without shrinkage. Which the fluidity increased from 294 mm to 335 mm after 30 min. There is no negative effect on the vertical expansion rate of offshore wind power grout (GMWP). When the content of C-S-H-PCE reached 0.8 %, the compressive strength of grouting material for offshore wind power (GMWP) after undergoing 60 d erosion in an artificial seawater environment increased to 100.0 MPa. Which also enhances its resistance against seawater erosion. It is concluded that adding C-S-H-PCE to the grouting material for offshore wind power (GMWP) can remarkably decrease the nucleation barrier E_α of the hydration reaction, which involving the process of increasing the consumption of C₃S, and enhancing the hydration rate. The incorporation of C-S-H-PCE accelerated the hydration process, resulting in an augmented production of CH and C-S-H, thereby reducing the inter-particle pores formed during early hydration. This study will provide a theoretical foundation for utilizing micron-sized C-S-H-PCE in grouting material for offshore wind power (GMWP).

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PCE 改性 C-S-H 对海上风电（GMWP）灌浆材料性能的影响

纳米 C-S-H-PCE 对水泥的早期强度具有有利的影响；然而，有关将微米 C-S-H-PCE 用作海上风电 (GMWP) 应用的灌浆材料的研究却十分有限。本研究旨在探讨微米 C-S-H-PCE 对专门为海上风电项目设计的灌浆材料性能的影响。研究采用水化动力学、XRD、TG/DTG、BSE 和 SEM 分析了水化热、水化产物相和水化产物形态。研究表明，海上风电灌浆材料（GMWP）的早期强度在 24 h 前显著提高。14 小时后，压缩强度提高了 270%，且无收缩。30 分钟后，流动性从 294 毫米增至 335 毫米。对海上风电灌浆料（GMWP）的垂直膨胀率没有负面影响。当 C-S-H-PCE 的含量达到 0.8 % 时，海上风电灌浆材料（GMWP）在人工海水环境中侵蚀 60 d 后的抗压强度提高到 100.0 MPa。这也增强了其抗海水侵蚀的能力。结论是，在海上风电灌浆材料（GMWP）中加入 C-S-H-PCE 可显著降低水化反应的成核势垒 Eα，从而增加 C3S 的消耗，提高水化速率。C-S-H-PCE 的加入加速了水化过程，从而增加了 CH 和 C-S-H 的生成，减少了早期水化过程中形成的颗粒间孔隙。这项研究将为在海上风电（GMWP）灌浆材料中使用微米级 C-S-H-PCE 提供理论基础。

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.