Webinar: Concrete Workability

Concrete Workability       

Date: December 8, 2021

Time: 1:30 – 2:30 pm CST

Presenter: Joe Daczko, FACI (Business Development Manager – Master Builders Solutions)

Credits: 1 PDH and/or 1 AIA CES LU (AIA Course #MCC120821)

Registration Link: https://cvent.me/rq71BQ

Description: Contractors want concrete to be as workable as possible to facilitate placement and consolidation without compromising performance in the hardened state. Concrete producers strive to consistently deliver expected performance attributes. Yet, hydration of Portland cement leads to a change in fresh concrete properties immediately after batching, most notably with respect to mix slump or workability. In air-entrained concrete mixtures, furthermore, modified slump can lead to changes in air content, typically a reduction, and potential rejection of the load. Invariably, rejected loads result in loss of revenue and reduced profits for concrete producers. This presentation will discuss workability retention and the various methods traditionally used to manage it. Additionally, an innovative, new admixture is introduced that provides workability retention without the adverse effects of current practices.

Learning Objectives:

• 1.    Understand the impact of concrete workability on the concrete contractor.
• 2.    At the conclusion of the presentation, participants will know the different ways of managing workability loss.
• 3.    Understand through trial evaluations how these methods affect other concrete properties.
• 4.    Learn about an innovative workability-retaining admixture technology that has been developed to provide reliable slump retention.

Speaker Bio: Joseph Daczko is the Business Development Manager for Master Builders Solutions in Cleveland, Ohio. His 30-year career dedicated to the development and application of concrete construction materials includes management of many BASF investigations, among them key projects addressing concrete exposed to acidic environments; fresh mix rheology and workability; self-consolidating concrete; and, rapid developing, high-strength concrete. He holds patents covering two areas of high early-strength concrete compositions.  Daczko has published numerous papers on rheology and self-consolidating concrete. His technical presentations have been featured at such seminars as the Second and Third International Symposia on Self-Compacting Concrete, ASTM and ACI symposia, as well as a variety of State Department of Transportation Workshops.

Sponsors: This webinar was developed cooperatively by concrete-related associations from Minnesota, North Dakota, South Dakota and Wisconsin.  The goal of the cooperative effort is to bring a greater awareness of cast-in-place concrete to the design and construction communities via quality continuing education programs.  (MCC, NDCC, SDRMCA, WRMCA)