Nano-Engineered Polyurethane Resin - Modified Concrete

Latex modified concrete (LMC), also known as polymer portland cement concrete refers to hydraulic cement mixed with organic polymers that are either dispersed or redispersed in water. The dispersion of polymers in water is sometimes referred to as emulsions. When polymer emulsions are mixed with portland cement concrete, the polymer particles come together to form a polymer film coating on aggregate particles and cement grains, and seals any voids or microcracks. The resulting mixture of polymer emulsion and portland cement concrete will have higher strength, high resistance to chloride penetration and is more inert to chemical attack than plain cement. One of the weak links in a cement-aggregate composite material is the bond between the matrix and the aggregates. To improve the performance of the alternative cement binder (ACB), the research team will develop a Nano-Engineered Polyurethane Resin (NEPU) resin to act as an intermediary between the aggregates and the ACB matrix. The NEPU will be used to precoat the aggregates prior to their placement within the ACB matrix. Embedded within the NEPU will be grains of the ACB. Then, when combined with the ACB and water, the unhydrated ACB particles embedded within the NEPU-coated aggregates will react with the surrounding matrix during hydration, providing an enhanced interfacial zone and corresponding improvement in the material properties of the hardened material. In the proposed work, the used of bio-based NEPU emulsion for LMC application will also be investigated. The characterization of NEPU including cure kinetics, rheology, UV resistance, and flame resistance will be conducted. The proposed NEPU-modified concrete will be subjected to physical and mechanical testing. The optimal composition of NEPU system will be investigated for determining the percentage by weight of nano-clay and soy-content.

• Record URL:
  http://transportation.mst.edu/research/r345/

Language

• English

Project

• Status: Completed
• Funding: $16052.00
• Contract Numbers:

  DTRT06-G-0014

  00042529

• Sponsor Organizations:

  Research and Innovative Technology Administration

  University Transportation Centers Program
  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  Missouri University of Science and Technology, Rolla

  328 Butler-Carlton Hall
  1401 N. Pine Street
  Rolla, MO  United States  65401
• Principal Investigators:

  Chandrashekhara, K

• Start Date: 20130501
• Expected Completion Date: 0
• Actual Completion Date: 20131231
• Source Data: RiP Project 34931

Subject/Index Terms

• TRT Terms: Binders; Chlorides; Latex modified concrete; Polymer asphalt; Polymers; Polyurethane resins; Portland cement concrete
• Subject Areas: Highways; Materials; I30: Materials;

Filing Info

• Accession Number: 01532655
• Record Type: Research project
• Source Agency: Center for Infrastructure Engineering Studies
• Contract Numbers: DTRT06-G-0014, 00042529
• Files: UTC, RIP
• Created Date: Aug 1 2014 1:15AM