This technical session aims to present the current state of the art in the formulation and applications of polymer concrete. The session will present the latest research finding on the use of nanomaterials to improve the rheological, electrical, and mechanical properties of polymer concrete. The session will highlight new research results showing the use of biopolymers to produce sustainable polymer concrete with a low carbon footprint. The session will also present the advances made in the use of polymer concrete for 3D printing. Finally, the session will explain the advances in using polymer concrete in bridge deck joints and overlays for accelerated bridge construction.
(1) Discuss the use of polymer concrete for accelerated bridge construction;
(2) Evaluate the potential use of biopolymers to produce sustainable polymer concrete;
(3) Describe innovative methods for reinforcing polymer concrete using textile fabric;
(4) Recognize a new class of 3D-printed polymer concrete.
This session has been AIA/ICC approved for 2 CEU/PDH credits.
Polymer Concrete for Closure Joints in Accelerated Bridge Construction
Presented By: Daniel Heras Murcia
Affiliation: University of New Mexico
Description: Polymer concrete offers a good bond and high shear strength as well as excellent flowability. These characteristics are typically needed to fill bridge deck closure joints in Accelerated Bridge Construction (ABC). We suggest that polymer concrete (PC) produced using polymethyl methacrylate is an excellent alternative material for closure joints in ABC. We present test results showing the excellent shear strength of PC compared with Ultra-High-Performance Concrete (UHPC). We show the ability of PC to have splice lengths shorter than that necessary for UHPC. It is evident that using PC in bridge deck closure joints in ABC can reduce the joint size and eliminate reinforcement congestion and provide long-term cost savings.
Polymer Modified Cement Concrete Overlay at Logan Airport
Presented By: Chris Davis
Affiliation: CTS Cement Mfg Corp
Description: In 2013 Massport completed a $310 million dollar CONRAC or Consolidated Rental Agency Complex. This consolidation allowed Massport to reduce the number of vehicles servicing the agencies from 150 vans to 28 hybrid double buses. Over the years it was apparent that these large buses were damaging the asphalt overlay on the approach structures. In 2017 it was decided to replace the asphalt with a polymer modified cement concrete overlay. To reduce the potential disruption to the traffic using the complex, the overlay work was scheduled over a weekend. To achieve this goal, a Very Early Strength (VES) Concrete was used for the installation. This presentation will show the details of the project.
Investigation of Flexural Response of Polymer Concrete Reinforced GFRP
Presented By: Abdirahman Haibe
Affiliation: University of Oklahoma
Description: Concrete - Fiber Reinforced Polymers (FRP) bond behavior has been an important topic of discussion in the last two decades as it plays a significant role in controlling debonding failures in FRP-strengthened flexural elements ultimately contributing to their structural performance. Polymers have known to have higher bond strength with other materials compared to cement due to lack of impregnation in the latter. Polymers in concrete are receiving increasing attention due to their higher durability and chemical resistance resulting in its increasing usage in civil and construction industries. However, there is limited work reporting the flexural response of polymer concrete reinforced with Glass Fiber Reinforced Polymer composites. This work investigates the flexural behavior, failure modes and ductility of GFRP reinforced Methyl Methacrylate based polymer concrete and reports on their comparison with cement based concrete.
Mechanical Properties of 3D-Printed Bio-Polymer Concrete
Presented By: Mohammed Abdellatef
Affiliation: Post-Doctor Fellow
Description: Traditional Reinforced Concrete (RC) is a major contributor towards greenhouse gas (GHG) emission as both cement and steel industries are responsible for about 35% of GHG emissions globally, and about 13% of GHG emissions inside the United States. In this work, biopolymer-based concrete is considered as an alternative to RC. The proposed new composite is a 3D printable bio-based polymer concrete that utilize a bio-polyurethane (BPU) as a binder replacement of Portland cement. Current BPU can be made of 100% sustainable plant resources, reducing the carbon footprint of concrete by 75% compared with fossil-based PU. Since the proposed composite is starting with a carbon footprint that is significantly lower than Traditional RC, Sequestered Carbon Particles (SCP) can be strategically used as aggregate replacement to modify the BPU concrete rheology for successful 3D printing, which could define this composite also as a carbon sink. The 3D printed BPU concrete is tested for mechanical and fracture properties.
Polymer Modified Concrete with Superior Performance For 3D Concrete Printing
Presented By: Moneeb Genedy
Affiliation: Cornell University
Description: Automated construction (or 3D printing) is permeating into a broad range of industries and has made its way into the construction industry. Automated construction potentially offers a whole range of benefits such as improving accuracy, precision, quality, profitability due to reduced waste and labor costs and the ability to print complex geometries. However, the most common technique, the discrete layer deposition technique, is faced with many challenges. One of the major challenges is the weak interlayer bond strength that occurs due to the nature of the process, especially in large scale 3D-printing as the delay time increases. SBR latex has been proven to improve bond strength, toughness, durability and reduce shrinkage of polymer modified concrete (PMC). In this investigation, the rheological properties of SBR latex PMC are studied to achieve a 3D printable PMC mix. The effect of SBR latex content on the pumpability and buildability of concrete mix is investigated. The quality of the interlayer bond strength of 3D printed PMC with varied SBR latex content is evaluated based on tensile bond and shear bond strengths. Additionally, the performance of 3D printed PMC is evaluated using compressive and flexural strengths. The results show that incorporating SBR latex improved the buildability, interlayer bond strength, and overall performance of 3D printed concrete elements.
Structural Behavior of Polymer Concrete Slabs Reinforced with GFRP
Presented By: Daniel Murcia
Affiliation: University of New Mexico
Description: Service conditions wastewater treatment structures and manholes, including high-temperature humid environments, with high acidity, increase the chance of corrosion for any reinforced concrete structures. Polymer concrete is suggested as the main structural material for its high durability and ability to withstand these conditions. This work presents the results of a full-scale structural testing program examining the structural behavior of polymer concrete slabs reinforced with Glass Fiber Reinforced Polymer (GFRP) bars. The moment-curvature of PC slabs reinforced with GFRP up to failure is presented. It is evident that PC slabs reinforced with GFRP can provide an appreciable flexural capacity with a very ductile behavior. A structural design approach using ACI guidelines is suggested to predict the flexural capacity of the PC slabs.