Optimization of synergy between cement, slag, and phosphogypsum for marine soft clay solidification
文献类型：期刊论文
| 作者 | Li, Sichen2; Wang, Dongxing2,3; Tang, Changyi1; Chen, Yiren4 |
| 刊名 | CONSTRUCTION AND BUILDING MATERIALS
 |
| 出版日期 | 2023-04-17 |
| 卷号 | 374期号:-页码:- |
| 关键词 | Soft clay solidification Ground granulated blast furnace slag (GGBS) Phosphogypsum (PG) Optimization Compression behavior Micro -mechanisms |
| ISSN号 | 0950-0618 |
| 英文摘要 | Ground granulated blast furnace slag (GGBS) and waste gypsum are cost-effective and environment-friendly substitute materials for Portland cement. This work aims to investigate and optimize the synergy of ordinary Portland cement (OPC), GGBS, and phosphogypsum (PG) in solidifying marine soft clay. The soft clay is treated with the ternary blending designed, and NaOH (NH), Na2SO4 (NS), calcium aluminate cement (CA), and gamma-nano-Al2O3 (NA) are used as additives to it. The effectiveness of the ternary blending and the additives is evaluated using unconfined compressive strength (UCS), consolidation, and durability tests, and the associated mechanisms are revealed by pH evaluation, X-ray diffraction (XRD), and scanning electron microscopy (SEM) tests. A high -efficiency ternary cement (TC) is developed by blending OPC, GGBS, and PG in the optimum ratio of 5:3:2. TC solidified clay (TCSC) exhibits better strength performance than cement or binary cement (OPC-GGBS/PG) so-lidified clay, due to the combined action of pozzolanic reaction and ettringite formation. The single additives, particularly NH and NS, can dramatically improve the early strength of TCSC, whereas the composite additives NS/CA and NS/NA finally result in greater strength gains. Besides, the lower compressibility and stronger sulfate resistance also verify TCSC as a preferable reinforced material over cement solidified clay, and these mechanical properties can be further improved using the composite additives. The increased basicity and the more effective role of ettringite explain the improved mechanical performance. In particular, the NS/CA and the NS/NA induce ettringite to grow in clustered and oriented patterns, providing effective pore filling and structural support, respectively. |
| 学科主题 | Construction & Building Technology ; Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000955060200001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35059]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Zhuhai Institute of Urban Planning & Design, Zhuhai 519000, China 2.School of Civil Engineering, Wuhan University, 8 Dong Hu South Road, Wuhan 430072, China 3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 4.Safecleen Technologies Co., LTD., Wuhan 430074, China |
| 推荐引用方式 GB/T 7714 | Li, Sichen,Wang, Dongxing,Tang, Changyi,et al. Optimization of synergy between cement, slag, and phosphogypsum for marine soft clay solidification[J]. CONSTRUCTION AND BUILDING MATERIALS,2023,374(-):-. |
| APA | Li, Sichen,Wang, Dongxing,Tang, Changyi,&Chen, Yiren.(2023).Optimization of synergy between cement, slag, and phosphogypsum for marine soft clay solidification.CONSTRUCTION AND BUILDING MATERIALS,374(-),-. |
| MLA | Li, Sichen,et al."Optimization of synergy between cement, slag, and phosphogypsum for marine soft clay solidification".CONSTRUCTION AND BUILDING MATERIALS 374.-(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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