Complementary use of industrial solid wastes to produce green materials and their role in CO2 reduction. (10th April 2020)

• Record Type: Journal Article
• Authors: Ren, Changzai; Wang, Wenlong; Yao, Yonggang; Wu, Shuang; Qamar, ; Yao, Xingliang
• Is Part Of: Journal of cleaner production. Volume 252(2020)
• Publication Date: 2020-04-10
• Subjects: Industrial solid waste -- High-performance -- Sulfoaluminate clinker -- Three-dimensional printing materials -- Carbon-dioxide emission reduction; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2019.119840
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Sulfoaluminate cement (SAC) is a quick-repairing engineering material, and it has advantages of an early strength, rapid hardening, and more importantly, a low sintering temperature. In the conventional SAC industry, natural gypsum, bauxite and limestone are used extensively as the main raw materials, which requires more natural-resource consumption, and emits greenhouse gases. Our group developed a novel technology to produce SAC green materials by using industrial solid waste (ISW) as raw material. The major mineral phases of the SAC green-materials clinker were C 4 A 3 $ and C2 S, the main hydration products were a C–S–H phase and AFt crystals, and the microstructure was dense. The hydration products had excellent mechanical properties; their compressive strength reached 75 MPa after 3 days of curing. To enhance the ISW value-added, three-dimensional printing materials, foam concrete block and high-water filling materials were developed based on the SAC green materials. CO2 emissions were reduced by 58% in SAC preparation by using ISW compared with conventional SAC preparation. Full use of the ISW to produce high-performance SAC green materials is a sustainable option and a possible path to decrease CO2 emissions in the SAC industry. Graphical abstract: This figure studies the feasibility of using 100% industrial solid waste in the preparation of SAC green materials and the product has high application value. Image 102 Highlights: Sulfoaluminate cement (SAC) were produced by using 100% industrial solid wastes. High-end building product can be prepared from SAC and industrial solid wastes. SAC production with solid wastes can reduce CO2 emission by 58%. Innovative preparation of SAC entirely with FGD gypsum providing the CaO. The synergistic effects of various industrial solid wastes are discussed.