The contents of this course include four recorded presentations from the ACI 2022 Spring Convention.
• Quality Assurance at the Ready Mixed Concrete Plant In-Transit and On the Jobsite for SCC, by Tarek Khan, Master Builders Solutions US LLC
• How Self-Consolidating Properties and Flow Affect Homogeneity of Long Precast Beams, by Dimitri Feys, Missouri S&T
• Development and Testing of an Injectable, 70 MPa, SCC Mix Design, by Eric Petersen, Webcor Builders
• Pumping of High-Strength SCC for High-Rise Construction—Governing Principals and Prediction, by Kamal Khayat, Missouri S & T
INSTRUCTIONS: Study the materials included in this module. Then, complete and pass the corresponding 10-question quiz with a score of 80% or higher to receive a certificate for 0.15 CEU (equivalent to 1.5 PDH).
Continuing Education Credit: 0.15 CEU (1.5 PDH)
Approved by AIA and ICC
Access Period: 30 days
Flow properties of self-consolidating concrete (SCC) are greatly affected by mixing and placement. The objective of this course is to report on recent advances in mixing, in-transit measuring, rheology control, and pumping of SCC. The course will highlight case studies of signature projects intended to push the envelope in processing and placement of SCC and semi-SCC. This includes extended workability retention, the development of novel responsive admixtures for rheology control during placement, as well as pumping pressure prediction, and the effect of pumping on concrete performance. The course should be of interest to concrete producers, material suppliers, contractors, consultants, researchers, and students.
Author: Khan, Feys, Peterson, Khayat
Publication Year: 2023
Categories: Mixture Proportioning, Placing, Self-Consolidating Concrete
Formats: Online Learning
Table of Contents
1. Discuss quality assurance procedures in the successful planning materials and design mixed, delivering, and placement of self-consolidating concrete (SCC) mixtures, including pre-placement meetings.
2. Explain the influence of yield stress and plastic viscosity of SCC on static and dynamic stability properties as SCC flows into and fills formwork with minimal segregation and how stability of SCC impacts hardened strength.
3. Discuss planning for workable mixture proportioning, processing techniques, pumping and placing requirements for unique high-rise building columns that used SCC as fill concrete in steel encased columns, and the need to demonstrate quality of SCC using column mockups.
4. Recall the effect of rheological characteristics on the pumping pressures needed to pump self-consolidating concrete over long lengths of pipes for high rise construction projects, including overcoming shear stresses in the SCC as it flows though pipes.
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