Effect of Composite Modification of Nickel Slag Powder and Polypropylene Fiber on Mechanical Properties of MKPC Mortar

• Published in: KSCE journal of civil engineering Vol. 26; no. 4; pp. 1894 - 1903
• Main Authors: Zhang, Zhongzhe, Ji, Yongsheng, Ma, Zhanguo, Xu, Zhishan, Gao, Furong, Xue, Qi
• Format: Journal Article
• Language: English
• Published: Seoul Korean Society of Civil Engineers 01-04-2022; Springer Nature B.V; 대한토목학회
• Subjects: Bend strength; Civil Engineering; Compressive strength; Deformation; Engineering; Flexural strength; Fractions; Friction reduction; Gels; Geotechnical Engineering & Applied Earth Sciences; Industrial Pollution Prevention; Magnesium; Magnesium oxide; Mechanical properties; Microstructure; Modulus of rupture in bending; Mortars (material); Nickel; Polypropylene; Scanning electron microscopy; Slag; Structural Engineering; Superconductors (materials); Tensile strength; 토목공학; Mechanical properties; MKPC; Nickel slag powder; Bending performance; Polypropylene fiber
• ISSN: 1226-7988; 1976-3808
• DOI: 10.1007/s12205-022-1391-8

In order to explore the influence of nickel slag powder (Ni) and polypropylene fiber (PP) on the performance of MPKC mortar, different mass fractions of Ni (5%–20%) and different volume fractions (0.6% and 1.0%) of PP were added to MKPC. The composite modified MKPC (CM-MKPC) specimens were tested and analyzed for flexural strength, compressive strength, split tensile strength, and bending performance. With the help of scanning electron microscope, the microstructure and fracture morphology of the modified MKPC specimens for related research. The results show that the addition of PP and Ni improves the mechanical properties of MKPC and improves its flexibility and deformation properties. When the content of Ni and volume of PP are 15% and 1.0%, respectively, the mechanical properties and bending properties of the modified MKPC mortar are the largest in the same group. Ni added to the MKPC gel system can reduce the friction between irregular magnesium oxide particles and between aggregates. In this way, PP fiber can well enter into the aggregate and play a bridging role at the interface, so that MKPC can better play its mechanical properties.