Abstract
This paper is about a study on the mechanical properties of a new polymer-cement composite (PCC) in constant elongation, tension, and shear. The study explored the effects of powder-liquid ratio and cement ratio on the mechanical properties of PCC through detecting the strength, deformation, and energy consumption of specimens under different powder-liquid ratios and cement ratios. In addition, scanning electron microscope and mercury injection apparatus were used for an in-depth analysis on the micromorphology and pore structure features of PCC under different powder-liquid ratios and cement ratios to explore the influence of powder-liquid ratio and cement ratio of the micromechanical properties of PCC. The results showed that, with the increase of powder-liquid ratio and cement ratio, the constant elongation adhesion strength of PCC decreased, and, at a high powder-liquid ratio (0.55) or a high cement ratio (0.5), the constant elongation adhesion strength of PCC completely disappeared. Meanwhile, with the increase of powder-liquid ratio and cement ratio, the tensile shear strength of PCC increased, while the deformation capacity of PCC decreased. The optimal ranges of powder-liquid ratio and cement ratio for PCC were 0.35–0.4 and 0.3-0.4, respectively. Furthermore, the increased powder-liquid ratio and cement ratio made the total pore volume decreased and pore structure refined, which improved the compactness of PCC, thus influencing the performance of PCC macroscopically. An achievement for the study is a flexible composite material, which was formulated with the polymer film as continuous base phase, as well as the inorganic composition and cement hydrates as dispersion phase. The material can effectively improve the economy and practicability of cementation of fissures for airfield pavement.
Highlights
Academic Editor: Yue Hou is paper is about a study on the mechanical properties of a new polymer-cement composite (PCC) in constant elongation, tension, and shear. e study explored the effects of powder-liquid ratio and cement ratio on the mechanical properties of PCC through detecting the strength, deformation, and energy consumption of specimens under different powder-liquid ratios and cement ratios
Scanning electron microscope and mercury injection apparatus were used for an in-depth analysis on the micromorphology and pore structure features of PCC under different powder-liquid ratios and cement ratios to explore the influence of powder-liquid ratio and cement ratio of the micromechanical properties of PCC. e results showed that, with the increase of powder-liquid ratio and cement ratio, the constant elongation adhesion strength of PCC decreased, and, at a high powder-liquid ratio (0.55) or a high cement ratio (0.5), the constant elongation adhesion strength of PCC completely disappeared
The influence of powder-liquid ratio and cement ratio on the mechanical performance indexes of PCC was systematically studied through constant elongation and tensile and shear tests; and, at the same time, basic microscopic PCC configurations and pore structure features observed by scanning electron microscope (SEM) and mercury injection tests were combined for an in-depth analysis on the effects of powderliquid ratio and cement ratio on the PCC microtopography and pore structure, as well as the mechanism of influence on the macroscopic mechanical performance of PCC. e main conclusions of this study are as follows: (1) With the increase of powder-liquid ratio, the constant elongation bonding property of PCC decreased
Summary
(1) Constant elongation test: Constant elongation test is mainly used to test the performance of specimens under long time tension, and its failure modes include cohesion failure and adhesion loss failure. The specimen was first loaded into the grip as shown in Figure 4(b) and stretched at a tensile rate of 5 mm/min until it was destroyed. The specimen was first loaded into a grip as shown, ensuring that the cement mortar substrate was fixed and clamped, and the right ascending end was lifted upward at a rate of 5 mm/min until the specimen was damaged.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
