Moderators: Neal S Berke, Jose Pacheco
These sessions are useful to design engineers, owners, concrete producers, and students that are involved or want to know more about modeling the service life of concrete exposed to chlorides. The differences between deterministic and probabilistic approaches will be addressed.
Learning Objectives:
(1) Summarize background on the models;
(2) Identify what tests are needed to run the models;
(3) Discuss how boundary conditions are determined;
(4) Establish service life predictions for scenarios.
The presenters will receive transport properties determined for each method on the same concrete mix.
Moderators: Maria S Konsta, Konstantin Sobolev
This session will highlight recent research and methods to characterize, control and optimize the electrical and thermal properties of concrete; multiscale analysis evaluation and tailoring of conductivity and energy storage or dissipation of the interfaces and interfacial transition zone (ITZ) and link with bulk properties; and simulation and/or prediction of impedance profiles.
Learning Objectives:
(1) Investigate the benefits and challenges of using multidimensional nanomaterials and phase change materials in modifying the electrochemical impedance, thermal conductivity and heat capacity of concrete composites/nanocomposites;
(2) Identify the electron transport pathways in nanostructured interfaces between functionalized nanomaterials and C-S-H via atomic-to-nanoscale microscopy and computed tomography techniques;
(3) Review advances in experimental research and computational modeling to evaluate the electrical-to-thermal or thermal-to-electrical energy conversion in cementitious systems;
(4) Summarize the recent research advances about the development of smart, strain-sensing cement-based and concrete materials and sensors for structural health monitoring (SHM).
Moderator: Lloyd J Keller
The objective is to enlighten the community as to the incompatibility between construction documents (especially from regulatory specifiers like DOT, Corps of Engineers and Ministry of Transport) and requirements to deliver constructible, durable, sustainable and cost-efficient infrastructure.
Regulatory governmental construction contract documents are typically maintaining traditional prescriptive language in their tendered projects. This is creating a significant barrier for bidders to efficiently and practically deliver a successful infrastructure project. Traditional prescriptive requirements often include minimum cement contents, limit the proportions of supplementary cementing materials or utilize empirical limits that are unsubstantiated based on current materials, mechanical properties, and methods innovations.
They are also barriers to attaining more sustainable concrete construction. There is a reticence to migrate towards a performance approach which appreciates the depletion of raw materials sources and allows for innovation, sustainability, constructability, and cost effectiveness. On many infrastructure projects, specifiers do not appreciate the need to move to performance type documents and are combining prescriptive with performance creating confusion and contradictory messages.
Learning Objectives:
(1) Report on the current state of the art with respect to Performance Specifications and how they are in fact misrepresented by inclusion of prescriptive requirements;
(2) Discuss the divergence and variation in performance requirements across the country;
(3) Describe the strategies now being used in the University programs to familiarize student engineers with the needs to be consistent in preparation of technical contract documents for performance;
(4) Demonstrate the recent performance tests that have been developed to ensure compliance with a performance specification.
Moderators: April Snyder, Eric R Giannini
Deleterious reactions involving concrete aggregate is one of the most critical durabilIty issues facing the industry. Research and development of test methods and guidance documents regarding alkali aggregate reactions (ASR/ACR) and sulfides (pyrrhotite & pyrite) in concrete aggregate are continually advancing. Often times education regarding guidance documents, test methods and specifications are not up to date and in agreement with each other. Additionally, the topics are complicated and guidance documents often difficult to follow. We intend for these sessions to update industry professionals at all levels from aggregate and concrete producers to design engineers and owner representatives on new test methods that have been approved by AASHTO but not in ASTM or ACI documents, provide explanation on how to navigate existing guidance considering these newer test methods, and provide update on research regarding pyrrhotite in concrete aggregates.
Learning Objectives:
(1) Discuss updates to alkali-aggregate reaction guidance in ACI 201.2R;
(2) Describe how long-term exposure testing informs best practices for preventing alkali-aggregate reactions in concrete;
(3) Discuss the benefits and challenges of implementing ASTM and AASHTO guidance to prevent ASR in state DOT specifications;
(4) Describe the importance of the alkali threshold for aggregates and alkali loading of concrete mixtures, and how they are used in newly developed test methods.
Moderator: Aparna S Deshmukh
Fire incidents in structures pose significant threats to life, property, and the environment. To address this critical concern, our one-day workshop brings together leading experts, researchers, and industry professionals to delve into the latest developments and innovations in ensuring fire safety of Fiber-Reinforced Polymer (FRP) composites in construction.
This workshop aims to provide a comprehensive exploration of various aspects related to fire and FRP composites, with a focus on fire rating, fire resistance, fire endurance, and fire safety. Attendees will gain valuable insights into how FRP materials and structures perform under fire conditions, and the implications for real-world applications.
Learning Objectives:
(1) Learn code requirements for fire applications;
(2) Understand fire testing requirements for FRP reinforced concrete;
(3) Learn about Polymer concrete (PC) materials development for fire resistance;
(4) Learn methods for calculating the fire resistance of concrete members
Moderator: Lawrence H Taber
ASTM C595 Type IL Portland-Limestone Cement has fully arrived in the United States and the industry is incorporating it along with other sustainability measures to drive towards carbon neutrality. Come learn about what contactors and finishers are discovering in the field and growing pains being discovered with impacts to curing. In addition to real-world observations several existing, new and planned research projects will be highlighted. While not all answers are known, progress is being made and challenges tackled!
Learning Objectives:
(1) Describe what Type IL portland-limestone cement is and how it differs from a traditional cement with regards to finishing and curing;
(2) Investigate what contractors and finishers are experiencing in the field as they incorporate Type IL portland-limestone cement in their markets;
(3) Discuss what research has been completed, what is currently being performed and what is planned;
(4) Recognize what to look out for as you specify and cure Type IL portland-limestone cement based on current observations.
Moderators: Caitlin M Tibbetts, Sherry O Sullivan
As sustainability and carbon embodiment have become driving forces in the construction industry, it is important to understand how concrete pavement has performed well in the past and identify areas of improvement for the future. A crucial aspect when comparing pavement surface options is considering the full life cycle and adjusting the design to minimize total carbon emissions. This session will discuss how the concrete pavement industry is adapting to these changes and incorporating buy clean initiatives into the design to meet the long-life and performance goals required. This session will be of interest to owners, consultants, contractors, and manufacturers.
Learning Objectives:
(1) Identify examples of long-life concrete pavements and highlight common factors that have contributed to their outstanding performance;
(2) Explain how the concrete pavement industry has responded to buy clean initiatives;
(3) Highlight the components and the process of incorporating life cycle analysis into concrete pavement design;
(4) Define recent modeling efforts and how asset management and end of life decisions can maximize carbon uptake;
(5) Recognize how concrete pavements can be used to achieve all the economic, environmental, and societal goals of sustainability while on the path to net zero emissions.
Moderators: Neal S Berke, Jose Pacheco
These sessions are useful to design engineers, owners, concrete producers, and students that are involved or want to know more about modeling the service life of concrete exposed to chlorides. The differences between deterministic and probabilistic approaches will be addreesed.
Learning Objectives:
(1) Discuss models for multiple layers that can address overlays and membranes;
(2) Explain the cracking of concrete in models;
(3) Propose how to address non-water saturation and chemical reactions specific to the concrete composition;
(4) Respond to questions from the audience to help in selection of the model to use.
The presenters will receive transport properties determined for each method on the same concrete mix.
Moderator: Maria S Konsta
This session will highlight recent research and methods to characterize, control and optimize the electrical and thermal properties of concrete; multiscale analysis evaluation and tailoring of conductivity and energy storage or dissipation of the interfaces and interfacial transition zone (ITZ) and link with bulk properties; and simulation and/or prediction of impedance profiles.
Learning Objectives:
(1) Examine fundamental research for the design and development of functional concrete to empower energy applications, such as green energy harvesting, and ability of thermal heating;
(2) Explain and assess the effect of dispersion/exfoliation and functionalization of nano-materials in optimizing the electron and phonon mobility in nanoscale interfaces and microscale ITZ;
(3) Discuss the importance of controlling the interfacial thermal resistance in designing advanced concrete with tunable electrical and thermal energy storage capacity;
(4) Identify best practices to control and modify the electrical and energy dissipation in cementitious systems reinforced with 1D, 2D and 3D nanomaterials.
Moderators: April Snyder, Eric R Giannini
Deleterious reactions involving concrete aggregate is one of the most critical durability issues facing the industry. Research and development of test methods and guidance documents regarding alkali aggregate reactions (ASR/ACR) and sulfides (pyrrhotite & pyrite) in concrete aggregate are continually advancing. Often times education regarding guidance documents, test methods and specifications are not up to date and in agreement with each other. Additionally, the topics are complicated and guidance documents often difficult to follow. We intend for these sessions to update industry professionals at all levels from aggregate and concrete producers to design engineers and owner representatives on new test methods that have been approved by AASHTO but not in ASTM or ACI documents, provide explanation on how to navigate existing guidance considering these newer test methods, and provide update on research regarding pyrrhotite in concrete aggregates.
Learning Objectives:
(1) Describe how the miniature concrete prism test AASHTO T380 can be applied to evaluate job concrete mixtures;
(2) Describe how the concrete pore solution alkalinity can be used to evaluate the effectiveness of fly ashes and other SCMs to mitigate ASR;
(3) Describe how microscopic evaluations creating 3D models of concrete affected by ASR induced deterioration can be used to understand the expansion mechanisms caused by the reaction;
(4) Discuss the potential for evaluating aggregate reactivity using ultra accelerated autoclave methods.
Moderator: JONATHAN M KUELL
Field Concrete Testing follows ASTM Standards with most projects requiring ACI Certification by the testing technicians. Test results that result in low strength not meeting specifications are challenged by both producers and Testing agencies with little validation the testing requirements. The Concrete Testing Adherence Collaboration (CTAC) is a tool that allows project teams to confirm testing performance daily, where ACI only validates performance once every five years.
Learning Objectives:
(1) History and current state of field concrete testing, both quality control and assurance performance;
(2) Insight on how the nation-wide CTAC program observations can be used to evaluate project, regional, and industry-wide testing;
(3) Understanding how to utilize the CTAC information to improve testing consistency on a project, company, and/or industry level through evaluation of REAL Observations;
(4) Learn the potential improvements that can be seen by reducing false positive/negative test results in the Concrete industry through open communication of the CTAC program.
Moderators: Sureka Sumanasooriya, Dean A. Frank
This session is sponsored by NEU: an ACI Center of Excellence for Carbon Neutral Concrete and will be geared toward all stakeholders, researchers, and students in the concrete industry. Attendees will have the opportunity to learn about new materials and technologies to reduce carbon emissions in cement and concrete industry, NEU technology validation/verification program status, ACI code advocacy efforts, and status of codes and standards on the use of low carbon cement and concrete low carbon cement and concrete materials.
Learning Objectives:
(1) Report on the current and upcoming low carbon concrete technologies and materials;
(2) Discuss codes and standards on low carbon cement and concrete materials;
(3) Explain NEU's technology validation/verification program;
(4) Recognize ACI code advocacy efforts toward the adoption of low carbon cement and concrete.
Deleterious reactions involving concrete aggregate is one of the most critical durability issues facing the industry. Research and development of test methods and guidance documents regarding alkali aggregate reactions (ASR/ACR) and sulfieds (pyrrhotite & pyrite) in concrete aggregates are continually advancing. Often times education regarding guidance documents, test methods and specifications are not up to date and in agreement with each other. Additionally, the topics are complicated and guidance documents often difficult to follow. We intend for these sessions to update industry professionals at all levels from aggregate and concrete producers to design engineers and owner representatives on new test methods that have been approved by AASHTO but not in ASTM or ACI documents, provide explanation on how to navigate existing guidance considering these newer test methods, and provide update on research regarding pyrrhotite in concrete aggregates.
Learning Objectives:
(1) Describe the reaction kinetics of iron sulfide oxidation in the alkaline environment of concrete;
(2) Identify the various factors that affect the oxidation reaction rate of pyrrhotite in concrete aggregates and test methods under development to predict the reaction in concrete in service;
(3) Discuss the current test methods under development to quantify the sulfide and sulfate content of aggregate and concrete;
(4) Describe the electromagnetic test method currently under development to determine the abundance of pyrrhotite in rock and concrete.
Moderator: Aparna S Deshmukh
Fire incidents in structures pose significant threats to life, property, and the environment. To address this critical concern, our one-day workshop brings together leading experts, researchers, and industry professionals to delve into the latest developments and innovations in ensuring fire safety of Fiber-Reinforced Polymer (FRP) composites in construction.
This workshop aims to provide a comprehensive exploration of various aspects related to fire and FRP composites, with a focus on fire rating, fire resistance, fire endurance, and fire safety. Attendees will gain valuable insights into how FRP materials and structures perform under fire conditions, and the implications for real-world applications.
Learning Objectives:
(1) Understand the behavior of FRP strengthened member during a fire event;
(2) Lean methods to calculate the fire resistance of RC members strengthened with FRP reinforcement;
(3) Learn testing requirements to evaluate the performance of external fire protection systems for FRP;
(4) Learn fire testing requirements for insulated concrete forms (ICF) construction;
(5) Learn fire testing requirements for FRP Pultruded shapes
Doors open: 6:25 pm – 6:30 pm
Awards Presentation: 6:30 pm – 6:45 pm
Reception: 6:45 pm – 8:00 pm
ACI President Antonio Nanni invites all convention attendees to the President’s Reception, where you’ll have the opportunity to network with committee Chairs, chapter Presidents, and international attendees. An assortment of food and a hosted bar will be available.