Free Online Education Presentations

Browse from hundreds of recorded presentations from ACI Conventions and other concrete industry events.

This Week's Featured Presentation

The Merdeka 118 Tower in Kuala Lumpur (KL118)
by Stephen Herald, Aggregate Industries

Presentation details

International Session – Special Buildings in Shape and Construction Method (ACI Spring 2022, Orlando, FL)The Merdeka PNB 118 tower in Kuala Lumpur, Malaysia will be completed this year. This iconic new landmark in the Kuala Lumpur skyline has been in the making since 2015, when Lafarge Malaysia started its partnership with general contractor Samsung C&T. Stephen Herald, RMX Technical Services Manager at LafargeHolcim US West Central Region, will discuss the main concrete design challenges that were solved during the preparation and implementation of this exceptional project. Stephen will focus on the high performance mixes that helped optimize the design and construction of the tower. Being able to design and test for high strength and rigidity was key to success. Moreover, a new approach to pumpability design and prediction was created, using a tribometer and simulation tool to ensure the feasibility of pumping concrete up to 1,700-feet heights.

Upcoming Presentation

December 12 - 18

Spray-Applied Colloidal Nano-Silica for Waterproofing and Deicing Chemical Protection of Concrete Pavements
by Brent Rollins, Spray-Lock Concrete Protection

Presentation details

Nano Coatings – A New Defense Paradigm for Ultimate Concrete Performance (ACI Spring 2022, Orlando, FL) Deicing salts have been identified as a primary contributor to premature concrete pavement failures. Various mitigative efforts have been studied, with increased pozzolan content providing some of the most promising results. While these measures provide potential strategies for current and future projects, the question of a viable approach to address existing pavements remains largely without a definitive answer. This study evaluates the effects of the application of spray-applied colloidal silica on the transport properties of existing concrete in the laboratory and provides information from two field evaluations.

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