Admixtures & Early Age Strength Development Evaluation

default Closed Message

Event Sponsor - Independent Cement & Lime

event image

When

Tuesday, 20 August 2019
5:30 PM - 8:30 PM

Where

City of Melbourne Bowls Club
Corner William Street & Dudley Streets , Melbourne West Melbourne VIC 3003

Overview

Admixtures are not a solution for every problem when dealing with concrete mixes, but innovative admixtures can improve the properties of concrete at both the plastic and harden states and significantly enhance concrete’s performance, especially in terms of reliability and economy. But getting the admixture right is only one part of the equation; to achieve predictable outcomes the rheology must be controlled. This is where methods in early age strength evaluation are vital.

Overseas methods in early age strength evaluation using maturity tests can provide vital data to contractors to better tackle immediate challenges facing the concrete industry. Lack of an accurate strength estimation method at the early stages of construction often results in contractors waiting too long to move to the next action (e.g. stripping formwork) causing costly delays or acting prematurely and proceeding on insufficiently cured concrete which can lead to structural cracks, future durability and performance issues or even structural collapse.

This seminar will provide an overview of admixtures, how to control the rheology of concrete, design special concrete mixes and recent developments of early age strength development evaluation methods using maturity tests. Attendees will have the opportunity to ask these experts in-depth questions about admixtures, properties of concrete at fresh state and early age strength development and see applications on how it is used in practice.

Prices

CIA Member $76.00 Non CIA Member $99.00 CIA Student / CIA Retired Member $38.00

Presenters

Dr. Martin Larisch
Golders Associates

Daniel Rowley
CE Concrete Solutions

Arthur Kyriazis
GCP Applied Technologies

Topics

Our Presenters

Dr Martin Larisch 
Dr Martin Larisch is a Principal Geotechnical Engineer with Golder Associates with more than 20 years of international construction experience. Throughout his career he has worked in technical and operational leadership roles for some of the leading ground engineering and piling companies in Germany, New Zealand and Australia and has successfully delivered hundreds of piling, shoring and basement projects. In recent years, Martin has also been appointed as an independent expert to provide technical and methodology advice for piling and concrete related defects for projects in Australia and New Zealand. He obtained his University Degree in Civil Engineering in Germany and has completed his PhD at the University of Queensland where he has also been appointed as an Adjunct Associate Professor. 

Martin is a Chartered Professional Engineer in New Zealand and Australia and he has published numerous technical papers in the field of concrete technology and foundation engineering. He was actively involved in the development of the Recommended Practice ‘Tremie Concrete for Deep Foundations’ published by the CIA in 2018 and the best-practice document ‘Guide for Tremie Concrete for Deep Foundations’ published by the EFFC and DFI in 2018.

Dan Rowley

Dan Rowley is the General Manager of CE Construction Solutions. He has over 25 years’ experience in the concrete construction industry; covering cement, concrete, admixtures, waterproofing, specialist coatings and concrete remediation. Dan is a current board member and past president of the Australasian Concrete Repair Association, Chairman of the ACT sub-committee of the Concrete Institute of Australian and a CIA NSW sub-committee member. He also possess an unhealthy love of concrete.

Arthur Kyriazis
Arthur Kyriazis’ career in the construction industry spans thirty-six years. He has worked as Plant Manager and as Regional Technical Manager for Pioneer Concrete (now Hanson) and Grace/GCP Construction, and later as a research and development chemist. He has helped develop admixtures for the concrete, cement, premix, precast, shotcrete and masonry industries and continues working in research and development in Melbourne.

Program

  • 5:30 - 6:00 pm  Registrations / Refreshments
  • 6:00 - 6:10 pm  Intro
  • 6:10 - 8:00 pm  Presentations

TOPICS -

Martin Larisch

Title: Performance Criteria for Tremie Concrete
High quality concrete for piles and diaphragm walls needs to meet particular performance criteria to achieve the required workability (plastic flow-ability) and stability (resistance to bleeding under pressure or segregation). Workability is normally measured by the concrete slump test and most concrete specifications, codes and standards largely rely on this test alone. However, the slump test alone is not a reliable method to determine workability, although it can reasonably indicate the consistency of a fresh concrete mix.

Stability requirements to control concrete bleeding and aggregate segregations are usually not part of most project specifications and no standard test methods are recommended. However, it is important to consider the pressure effects from the hydraulic head and self-weight of the fresh concrete inside the excavation (prior to setting) causing potential risks of bleeding and other associated stability and quality issues.

This presentation introduces the performance based fresh testing methods as recommended in Practice guideline “Tremie Concrete for Deep Foundations”, published by the Concrete Institute of Australia as well as the author’s experience with this document since its publication in 2012.

Dan Rowley
Topic: Concrete Maturity Testing - Unlocking Early Age Strength in Structures

Early, rapid, and accurate in-situ estimation of the compressive strength of concrete is one of the major challenges for the concrete industry. A practical solution for such challenges can prevent millions of dollars of extra annual spending for the construction industry and owners of civil structures.
Concrete maturity is an index value that represents the progression of concrete curing. It is based on an equation that takes into account concrete temperature, time, and strength gain. Concrete maturity is an accurate way to determine real-time strength values of curing concrete. This presentation will discuss the concept of maturity testing, methods of engaging with the testing practice and an overview on its current roll out into the Australian construction industry.

Arthur Kyriazis
Topic: The Role of admixtures to improve workability & rheology of concrete to facilitate better concrete placement


Arthur will take a brief look at the historical progression of water reducing technology before focusing on current innovating admixtures to assist high strength / high performance concrete. Then he will focus on the current admixture technology and the principles it’s based on to explore the following areas –

  • high water cut and maximum total cementitious dispersion
  • extended slump/ flow retention
  • special admixtures to support lowering of concrete viscosity & stickiness
  • admixtures to support concrete pumping
  • admixtures to minimize concrete segregation.
  • 8:00 - 8.30 pm  Audience questions, input and debate.

Communication Devices

 
Please note that audio and video recording or taking photographs is prohibited during this event without express approval from the Concrete Institute of Australia.

By making a booking you are acknowledging that you have read and accept the Concrete Institute of Australia’s
Terms of Service.