Preparation and Processability of Light-Transmitting Magnesian Cementitious Materials

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Title: Preparation and Processability of Light-Transmitting Magnesian Cementitious Materials

Author(s): Fazhou Wang, Chang Shu, Dingheng Zheng, Lu Yang, and Peng Liu

Publication: Materials Journal

Volume: 113

Issue: 6

Appears on pages(s): 719-724

Keywords: cracking; elastic modulus; fluidity; interfacial binding force; light-transmitting concrete

Date: 11/1/2016

Abstract:
Light-transmitting magnesian cementitious materials (LTMCMs) were prepared via casting molding in this work. The slurry fluidity, processability, and interface bonding between cement and optical fiber were investigated in detail. The results showed that the slurry fluidity of magnesium oxychloride cement (MOC) can be controlled in the range of 0.03 to 0.1 L/s (tested by V-funnel method) by adding a certain amount of fly ash (FA) and silica fume (SF). With the addition of polymethyl methacrylate emulsion (L23) and polyvinyl alcohol (PVA) emulsion, the elastic modulus of LTMCM was reduced from 565.63 to 304.57 ksi (3900 to 2100 MPa), which significantly enhanced the processability of the as-prepared samples. Additionally, the peak pullout load of polymethyl methacrylate (PMMA) optical fiber in MOC was increased from 0.024 to 0.039 kip (106.4 to 175.3 N) after treatment by acetone and a coupling agent. The light transmittance of LTMCM increased from 8.9 to 48.2% along with varied percentages of PMMA optical fiber in the composites.