Intelligent Compaction News

FHWA, The Transtec Group Release Intelligent Compaction Measurement Values Tech Brief

The FHWA and Transtec released a technical brief to demystify Intelligent Compaction Measurement Values

Because Intelligent Compaction Measurement Values (ICMV) is a difficult subject to understand and there is a lack of systematic and comprehensive documents explaining ICMV, the Federal Highway Administration (FHWA) and pavement engineering firm The Transtec Group released a technical brief to demystify ICMV. The tech brief provides a comprehensive description on the mechanisms of ICMV and serves as a road map for using ICMV for real-time compaction monitoring, control, and acceptance. It covers how to measure and calculate ICMV, models for solving ICMV, and the various levels of ICMV.

Download the ICMV tech brief

ICMV is a generic term for advanced measurement systems instrumented on vibratory rollers as a key components of intelligent compaction (IC) systems. ICMV is based on the acceleration signals that represent the rebound force from the compacted materials to the roller drums. ICMVs are in different forms of metrics with various levels of correlation to compacted material’s mechanical and physical properties, such as stiffness, modulus, and density.

Without ICMV, it is difficult, if not completely impossible, to determine whether compaction has reached the required properties. In addition, ICMV can identify weak spots or difficult-to-compact locations even if there were sufficient roller passes for those areas. ICMV is the only technology that can provide measurements for as-built properties with 100 percent coverage of compacted areas. The tech brief provides important technical classification and level systems leading to true layer-specific modulus and density measurements of compacted materials.

ICMV helps contractors measure the levels of compaction during the compaction process to allow just-in-time adjustment of operation to optimize the compaction efforts, which leads to improved compaction quality control (QC).

ICMV provides owners and agencies with permanent records of as-built information that can be used for forensic studies and future rehabilitation decisions, which leads to improved quality acceptance and assurance (QA). High-level ICMV can also help with the future implementation of Building Information Modeling (BIM) for pavements.

Intelligent Compaction is an equipment-based technology to improve quality control of compaction.

Intelligent Compaction

IC is an equipment-based technology to improve quality control of compaction. IC vibratory rollers are equipped with a high precision global positioning system (GPS), infrared temperature sensors, an accelerometer-based measurement system, and an onboard color-coded display.  IC is used to improve compaction control for various pavement materials including granular and clayey soils, subbase materials, and asphalt materials. The accelerometer-based measurement system is a core IC technology that was invented in the early 80’s and is still evolving today.

Over the summer, the FHWA and Transtec released two other IC technical briefs:

  • Specification for Intelligent Compaction Technical Brief (FHWA-HIF-17-037) provides a review of national and state IC specifications and recommendations for future enhancements.
  • Color-Coded IC Maps Technical Brief (FHWA-HIF-17-036) outlines guidelines and recommendations for color-coded maps using IC and paver-mounted thermal profiler (PMTP) data.

Veta Software

IC and paver-mounted thermal profiler (PMTP) systems gather a tremendous amount of complex geospatial data that poses challenges for data management, analysis, and reporting. These issues have become the main hurdles during implementation. To address these issues, the Minnesota Department of Transportation, FHWA, and the Transportation Pooled Fund Study, TPF-5(334) have funded development of the Veta software tool for IC and PMTP data viewing and analysis.

Veta is a map-based software tool for viewing and analyzing geospatial data. Currently, Veta can import data from various IC machines and PMTP scanners to perform editing, filtering, spot test correlation, and statistical analysis as a post-processing tool.

One of the salient features of Veta is to viewing IC and PMTP data as color-coded maps on top of geographical road or aerial maps to facilitate quantitative interpretation. Key examples are for evaluating consistency of rolling patterns and for identifying cold blobs or streaks of asphalt temperature segregation. Veta allows users to select any specific passes to be viewed, including the last pass or final coverage.

Veta is required in FHWA and AASHTO PP80-17 specifications, and is increasingly adopted by state highway agencies.

The Transtec Group developed Veta with support from the FHWA. Veta is free to download. Currently, the Transportation Pooled Fund (TPF) study, “TPF-5(334) Enhancement to the Intelligent Construction Data Management System (Veta) and Implementation” is leading the effort for enhancing and maintaining Veta to facilitate the national IC/PMTP implementation.

40th Anniversary of CCC Symposium, Vienna, Austria, Nov. 29, 2018

The 40th Anniversary of CCC (Continuous Compaction Control) Symposium will be held in Vienna, Austria, Nov. 29, 2018. It is coordinated by Dr. Pistrol Johannes, also a Technical Committee member of IICTG. Back to where CCC was started in 1978, 40 years ago (now also known as Intelligent Compaction – IC), the symposium will cover the following topics:

• Historic overview of roller compaction and Continuous Compaction Control (CCC)
• Continuous Compaction Control – CCC applications and interpretation of measurements
• Field testing methods for compaction control (e.g. static and dynamic plate load test)
• Standardization, QA/QC and design aspects
• Recent and future developments (e.g. compaction equipment, electronics, internet)

The deadline for the abstract submission is April 30th, 2018. Please mark your calendar!

IC Presentation at AKDOT Asphalt Summit, Nov. 7th

The 2017 Alaska DOT Asphalt Summit will feature presentations on Intelligent Compaction (IC) and Paver-mounted Thermal Profiles (PMTP) on November 7th, 2017. Dr. George K. Chang of Transtec Group, also President of IICTG, will provide in-depth description of how intelligent compaction (IC) and paver-mounted thermal profiling (PMTP) can be used to improve construction quality control and eventually for acceptance. With the use of Veta software, the big data management (including data processing, viewing, analysis, and report) of IC and PMTP can be facilitated. National implementation of IC and PMTP will be also be presented – including challenges/solutions for States/Industry as well as benefits on both sides. Mike Himler, Granite & Ron Searcy, and Richard Giessel, AKDOT, will share their IC and PMTP experiences from the Glenn Highway project.

Veta 4.3.27 Released

This version fixes a few problems. Most importantly, there was an issue where HAMM data was not always imported correctly. Existing HAMM projects will be reprocessed to correct this.

Download Veta 4.3

Import

  • Fix: HAMM data that was recorded as Vibratory but had no HMV value was marked as Vibratory instead of Static.

Filters

  • Fix: Adding more than one daily lot at a time could cause a crash.

Misc

  • Fix: Could not save extremely large projects.

First Intelligent Construction Technologies Conference a Success

First Intelligent Construction Technologies Conference a Success

The first-ever International Intelligent Compaction Technologies Group (IICTG) conference was held September 26-28 in Minneapolis, Minnesota, USA. More than 165 industry professionals were in attendance, representing manufacturing companies, public agencies, private contracting and consulting services, and academia from across North America, Europe, and Asia.

The theme of the conference was Intelligent Construction Technologies – Past and Future, covering the past 25 years of Intelligent Construction Technologies (ICT) development and looking forward to the future of the technologies. On the conference agenda were presentations, workshops, vendor exhibits, and interactive panel discussions. Some of the most popular topics covered include Intelligent Compaction Measurement Values (ICMV), drones, and Building Information Modeling (BIM).

The goal of the conference was to create a platform so all ICT users, experts, and manufacturers could collaborate and move the technology forward.

Curt Turgeon, MnDOT Pavement Engineer and IICTG Steering Committee member, said he found the wide-range of attendees to be the most beneficial aspect of the conference.

“There were professors from China, Europe, and United States providing research on near-future potential,” Turgeon said. “There were international equipment developers and support staff providing the latest in available technology. There were several contractors with firsthand experience using the equipment on today’s projects, and there were more than a dozen state DOTs representing specifiers and practitioners. The conference format provided opportunities for all to provide input and learn across all the interacting disciplines.”

Don Matthews, TSD Manager Chief Engineer at Pavement Recycling Systems, Inc. and IICTG Technical Committee member, found the conference to be beneficial for all people and organizations using ICT.

“The conference gave a great insight into both the challenges and successes that agencies, original equipment manufacturers (OEM), and contractors have experienced in intelligent construction,” said Matthews. “It also shed light on what it will take to make IC more successful and cost effective for full scale implementation in the future.”

For more information about the conference and the topics covered, visit IICTG.org.

The first ever International Intelligent Compaction Technologies Group (IICTG) conference was held September 26-28 in Minneapolis, Minnesota, USA.

IICTG Conference 2019

The next IICTG Conference will be held in March 2019 in Beijing, China. The theme of the second conference is Innovate for Growth and Cooperate for Win-Win. Please visit IICTG.org for more information.

About IICTG

Dr. George Chang, IICTG President and Director of Research at The Transtec Group, has been instrumental in implementing intelligent construction technologies over the past ten years, working with a diverse range of organizations. Dr. Chang began to realize that these organizations, such as state departments of transportation, contractors, and manufacturers, were all using the same types of innovative technologies and discovering new ways of using them or improving them, but there was a lack of collaboration between the groups. To build a bridge over the collaboration gap, Dr. Chang, with the help of many others, started IICTG in the summer of 2016.

IICTG is a source for knowledge and information on intelligent construction technologies for public agencies, contractors, consultants, academia, and all other relevant industries. IICTG provides a forum for the dissemination of knowledge concerning the collection, analysis, and application of information relating to intelligent construction technologies.

IICTG membership is free and open to representatives of public agencies or organizations active in or interested in the scope of IICTG. If you are interested in becoming a member, contact IICTG.

IC Presentation at Chinese Construction Equipment Conference

Prof. Guanghui Xu, an IICTG Executive Committee member, will make an intelligent compaction presentation at the Chinese Construction Equipment conference in Xu Zhou, China, on October 23, 2017. This conference is organized by the Pavement and Compaction Machines subcommittee of the Chinese Association of Construction Equipment Industry.

Prof. Xu’s presentation topic will be “Development of Intelligent Compaction Equipment to Improve Construction Quality “.

IICTG 2017 – A Huge Success

The International Intelligent Construction Technologies Group (IICTG) 2017 conference is a huge success! Thanks to all attendees, speakers, sponsors, and exhibitors… and esp. the IICTG 2017 planning committee! The great presentations will be posted in the next few days on a “IICTG member-only” webpage. Find out how to be an IICTG member here!

Here is the group picture! The original picture file is available on the 2017 conference webpage.

Veta 4.3.23 Released

This version fixes an issue that caused data filters that used a range (minimum and maximum) to not have an effect. This will change any results that used such a filter. Final coverage will be automatically be reprocessed to correct this.

Download Veta 4.3

Final coverage will be reprocessed.

Filters

  • Fix: Selecting a range of values for an item in a data filter had no effect. For example:
    100 F < Temperature < 200 F

Analysis

  • Fix: Changes to the sublots could cause the software to crash when navigating the analysis.