Feasibility Study of SBR-Modified Cementitious Mixtures for Use as 3D Additive Construction Materials

• Published in: Polymers Vol. 11; no. 8; p. 1321
• Main Authors: Kim, Kwan Kyu, Yeon, Jaeheum, Lee, Hee Jun, Yeon, Kyu-Seok
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 07.08.2019; MDPI
• Subjects: Admixtures; Automation; Butadiene; Cement; Concrete; Construction industry; Construction materials; Extrudability; Feasibility studies; Fly ash; fresh properties; Hydration; Latex; Manufacturing; Particle size; Polymers; Ratios; SBR latex; SBR-modified cementitious mixtures; SBR/cement ratio; Silica fume; Silicon dioxide; Test methods; three-dimensional additive construction; Viscosity; SBR-modified cementitious mixtures; three-dimensional additive construction; SBR latex; fresh properties; SBR/cement ratio
• ISSN: 2073-4360; 2073-4360
• DOI: 10.3390/polym11081321

The primary purpose of this study was to investigate the feasibility of applying polymeric cementitious materials to three-dimensional additive construction (3DAC). Specifically, styrene-butadiene rubber (SBR) latex was employed as an admixture to produce SBR-modified cementitious mixtures, and their fresh properties were experimentally investigated to determine the feasibility of their use in the 3DAC process. The SBR/cement ratio was controlled based on four main materials (i.e., cement, sand, silica fume, and fly ash) in order to determine the optimal fresh properties. The test results revealed that the SBR-modified cementitious mixtures showed excellent flowability, extrudability, buildability, and open time, all of which are required for 3DAC materials. The optimal flow of the SBR-modified cementitious mixtures was 70% ± 1%, which is appropriate for 3DAC applications. According to the experiment results, the SBR-modified cementitious mixtures were sufficiently competitive to serve as a new class of materials for 3D additive construction.