Status

Sequential Number

Identification Number

Matching Research Agency

 Missouri Department of Transportation (MoDOT)

Principal Investigator

Student Involvement

3 graduate students 

Project Objective

The objective of the proposed research is to determine the structural implications of using SCC mixes compared to traditional concrete mixes. This study will focus on the hardened properties of SCC mixes containing Missouri aggregates and will develop guidelines on its use in infrastructure elements for MoDOT.

The proposed research plan includes a description of the seven (7) tasks necessary to reach this goal, as well as the task durations and level of effort. The research tasks consist of the following:

1. Literature Review,

2. Mix Development,

3. Bond and Development of Prestressing Strand and Mild Steel,

4. Hardened Properties of SCC Mixes,

5. Shear Properties of SCC Mixes,

6. Recommendations and Specifications for SCC Implementation, and

7. Value to MoDOT and Stakeholders to Implementing SCC

Project Abstract

Because of its unique nature, self-consolidating concrete (SCC) has the potential to significantly reduce costs associated with transportation-related infrastructure, benefiting both MoDOT and the residents of Missouri. SCC is a highly flowable, nonsegregating concrete that can be placed without any mechanical consolidation, and thus has the following advantages over conventional concrete:

•decreased labor and equipment costs during concrete placement,

•decreased potential for and costs to repair honeycombing and voids,

•increased production rates of precast and cast-in-place elements, and

•improved finish and appearance of cast and free concrete surfaces.

However, concerns exist over the structural implications of SCC in cast-in-place and precast elements. Specifically, higher paste contents, higher fines contents, and the use of smaller, rounded aggregates may significantly alter the creep, shrinkage, bond, and shear strength of SCC mixes as compared to traditional concrete mixes with the same compressive strength. These concerns increase for mixtures that use untested aggregate types and various supplementary cementitious materials. Consequently, to achieve the benefits and potential savings with SCC, guidelines are needed for its proper application in bridges, roadways, culverts, retaining walls, and other transportation-related infrastructure components.

Project Deliverables

A final report and final specification will be provided at the project deliverables.

Anticipated Benefits

The benefits of the proposed research is an improved understanding of the structural implications of using SCC mixes compared to traditional concrete.

Milestones

Relationship to other Research/Projects

Match project to MoDOT SCC study.

Technology Transfer Activities

Technology transfer will include a final technical report, a minimum of one technical presentation at a national or international domestic conference and a minimum of one conference and/or journal publication.

Transportation Research Board Keywords

Self Consolidated Concrete, High Strength Concrete, Shear Strength, Bond Strength, Structural Concrete