Role of Aggregate Packing in Segregation Resistance and Flow Behavior of Self -Consolidating Concrete

A numerical model based on rheology and mechanics analysis is developed to predict dynamic segregation. The calculated dynamic segregation agrees well with values obtained in the laboratory, using the flow trough, and in the field. It is found that smaller aggregate size, continuous aggregate gradation, lower aggregate density, and higher paste viscosity and yield stress reduce dynamic segregation. Among these factors, aggregate size, gradation, density, and paste rheology have bigger effects than aggregate volume and initial concrete flow velocity. A simple method is introduced to set the maximum flowing distance for SCC mixes based on the flow trough result and mix proportions.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Civil Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Shen, Lin

Contributors dc:contributor

• Leslie Struble

• Engineering, Civil

Language dc:language

eng

Identifier

(MiAaPQ)AAI3290373

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/83347