Document Type

Thesis - University Access Only

Award Date

2007

Degree Name

Master of Science (MS)

Department / School

Civil and Environmental Engineering

Abstract

South Dakota State University (SDSU) and the South Dakota Department of Transportation (SD DOT) have begun research into the feasibility and performance of self-consolidating concrete (SCC) to be used in SDDOT projects in South Dakota. Box culverts were selected to be the first members to be developed using SCC in South Dakota. The research is part of SD DOT Project SD2005-13, "Structural Applications of Self-Consolidating Concrete". The objective of this research was to develop and test SCC mix designs making use of South Dakota local aggregates. This research included a literature search, development of SCC mix designs utilizing South Dakota local aggregates, aggregate testing, SCC materials testing of both fresh and hardened properties, and development of special provisions in coordination with the SD DOT and members of the industry. Twelve mix designs were studied. Mixes were developed for eastern South Dakota local aggregates and western South Dakota local aggregates. For each aggregate designation, a mix for precast SCC and a mix for cast-in-place SCC were tested. For each of the four base mix designs, the water/cement (w/c) ratio was varied. The w/c ratio values were 0.38, 0.42, and 0.46 for the mixes tested. The fresh concrete tests performed on the SCC evaluated flowability, passing ability, and segregation resistance. The hardened concrete tests performed measured compressive strength, tensile strength, modulus of rupture, and segregation. All SCC mix designs were stable in the laboratory conditions by visual stability index and hardened visual stability index. As w/c ratio increased, the SCC flowability (slump) typically increased. As w/c ratio increased, blocking typically decreased. As w/c ratio increased, SCC compressive strength decreased at 7 days and 28 days. As w/c ratio increased, splitting tensile strength decreased. As w/c ratio increased, modulus of rupture of the SCC decreased.

Library of Congress Subject Headings

Concrete -- Testing

Aggregates (Building materials) -- South Dakota -- Testing

Culverts -- South Dakota -- Design and construction

Format

application/pdf

Number of Pages

262

Publisher

South Dakota State University

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