Influence of polyvinyl alcohol on the physicochemical and self-sensing properties of nano carbon black reinforced cement mortar
Source abstract
Abstract
Abstract This paper proposes polyvinyl alcohol (PVA) as an additive to improve the mechanical and self-sensing properties of nano carbon black (NCB)-cement mortar. X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and Raman spectroscopy were used to reveal the chemical interaction between NCB and PVA. Furthermore, the effects of PVA on the mechanical performance, self-sensing behavior, and microstructure of NCB-cement mortar were systematically investigated. The results demonstrate that PVA enhances the dispersion uniformity of NCB, and the formation of an NCB/PVA “grape-bunch” structure (a three-dimensional network with NCB particles distributed along the PVA film) is key to achieving the cooperative improvement effect. The incorporation of 0.6 wt% PVA and 0.5 wt% NCB increased the compressive and flexural strengths by 24 % and 25 %, respectively, compared to the sample with NCB alone. In addition, the mortar sensor with combined PVA and NCB exhibited higher stress sensitivity under cyclic loading. Cost-benefit analyses indicate that the use of NCB/PVA as a composite modifier to develop cement mortar sensors is an economic and effective option.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Smart Materials for Construction · Concrete and Cement Materials Research · Innovative concrete reinforcement materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Future Transportation , Guangzhou Maritime University , Guangzhou 510725 , China
School of Smart City Engineering , Guangzhou Vocational University of Science and Technology , Guangzhou 510555 , China
College of Water Conservancy and Civil Engineering, South China Agricultural University , Guangzhou 510642 , China
Engineering Research Center for Solid Waste Utilization Towards Green Intelligent Construction , Guangzhou Maritime University , Guangzhou 510725 , China
Guangdong Provincial Key Laboratory of Green Construction and Intelligent Operation & Maintenance for Offshore Infrastructure , Guangzhou Maritime University , Guangzhou 510725 , China
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