Development and Characterization of Sustainable Cement-Free Controlled Low Strength Material Using Titanium Gypsum and Construction Waste Soil

被引：0

作者：

Wu, Yunfei ^{[1
]}

Geng, Jian ^{[2
]}

Zhu, Haoze ^{[2
]}

Jin, Chen ^{[3
]}

Kang, Nengneng ^{[4
]}

机构：

[1] School of Civil Engineering, Huzhou Vocational and Technical College, Huzhou

[2] School of Civil Engineering, Ningbo Tech University, Ningbo

[3] College of Civil Engineering and Architecture, Zhejiang University, Hangzhou

[4] Huzhou Zhengtong Traffic Engineering Testing and Inspection Co., Ltd., Huzhou

来源：

Materials | 2024年 / 17卷 / 23期

关键词：

construction waste soil; controlled low strength material; the strength formation mechanism; titanium gypsum; working and hardening propensities;

D O I：

10.3390/ma17235698

中图分类号：

学科分类号：

摘要：

This study investigates the utilization of titanium gypsum (TG) and construction waste soil (CWS) for the development of sustainable, cement-free Controlled Low Strength Material (CLSM). TG, combined with ground granulated blast furnace slag, fly ash, and quicklime, serves as the binder, while CWS replaces natural sand. Testing thirteen mixtures revealed that a CWS replacement rate of over 40% controls bleeding below 5%, with a water-to-solid ratio between 0.40 and 0.46, ensuring flowability. Higher TG content reduces flowability but is crucial for strength due to its role in forming a crystalline network. Compressive strength decreases with higher TG and water-to-solid ratio, while 3–5% quicklime provides a 56 day strength below 2.1 MPa. Higher CWS reduces expansion, and TG content between 60% and 70% minimizes volume changes. XRD and SEM analyses underscore the importance of controlling TG and quicklime content to optimize CLSM’s mechanical properties, highlighting the potential of TG and CWS in creating low carbon CLSM. © 2024 by the authors.

引用

共 43 条

[1]

Gazquez M., Bolivar J., Vaca F., Garcia-Tenorio R., Caparros A., Evaluation of the use of TiO<sub>2</sub> industry red gypsum waste in cement production, Cem. Concr. Compos, 37, pp. 76-81, (2013)

[2]

Zha F., Qiao B., Kang B., Xu L., Chu C., Yang C., Engineering properties of expansive soil stabilized by physically amended titanium gypsum, Constr. Build. Mater, 303, (2021)

[3]

Lin Q., Zhen X., Rong Y., Li Y., Zhang H., Zhang Q., Yao Z., Yao K., Investigation on Mechanical and Microstructure Properties of Silt Improved by Titanium Gypsum-Based Stabilizer, Materials, 16, (2023)

[4]

Rahmani O., Siderite precipitation using by-product red gypsum for CO<sub>2</sub> sequestration, Util, 24, pp. 321-327, (2018)

[5]

Yang Y., Kou L., Fan Q., Wang J., Jiang K., Synthesis of an efficient adsorbent from titanium gypsum for phosphate removal: Effect of co-presence of waste sludge, J. Environ. Chem. Eng, 10, (2022)

[6]

Liu X., Liu W., Wan Y., Li H., Zhang L., Chang N., Jiao X., Environmentally friendly lime melting slag-GBFS-titanium gypsum cementitious material: Mechanical properties, hydration characteristics and microstructure, Constr. Build. Mater, 440, (2024)

[7]

Report on Controlled Low-Strength Materials, (2013)

[8]

Do T.M., Kang G.-O., Kim Y.-S., Development of a new cementless binder for controlled low strength material (CLSM) using entirely by-products, Constr. Build. Mater, 206, pp. 576-589, (2019)

[9]

Katz A., Kovler K., Utilization of industrial by-products for the production of controlled low strength materials (CLSM), Waste Manag, 24, pp. 501-512, (2004)

[10]

Ling T.-C., Kaliyavaradhan S.K., Poon C.S., Global perspective on application of controlled low-strength material (CLSM) for trench backfilling—An overview, Constr. Build. Mater, 158, pp. 535-548, (2018)

← 1 2 3 4 5 →