Brief Overview of Global MLS Users Group Applications 2015 Report to TRB AFD40(2) committee 12 January 2015 Wynand Steyn Univ of Pretoria South Africa

Context Feedback from researchers & practitioners using scaled and full-scale MLS in lab and field projects BASt (Federal Hwy Res Inst, Germany) MLS10* CRILP - Liaoning Prov China – MLS66 EMPA Switzerland – MLS10* Tongji University China – MLS66 VTI Blacksburg mmls3* with Turner Fairbank ALF South Africa – mmls3* Note changed designation by manufacturer: *MLS10 =MLS30 & MMLS3 = MLS11

BASt (Federal Hwy Res Inst, Germany) MLS30 Webinar Oct 2015 CRILP - Liaoning Prov China – MLS66 Bridge deck surfacing see photo collage Currently a field APT study with the MLS66 on the Plant-mix Cold Recycling Techn. on Expressway Published by NE Univ Press An Introduction to APT of Asphalt Pavement Practice a first specialized publication of APT in China MLS Full-scale Accelerated Pavement Test of Asphalt Pavement.

SDP APT – Loading Application MLS66 moved onto the bridge section Fig.2 MLS66 on test structure

Bridge Steel Deck Overlay Lioaning Prov

EMPA Switzerland – MLS130/MLS11 Impact of damage of lateral wandering evaluated using the MLS30 Laboratory tests with MLS11 were carried out on extracted trafficked and non-trafficked pavements with different reinforcement grids MLS11 testing of efficiency of asphalt reinforcement grids to delay pavement reflective cracking, including tests at low temperatures

Location: North of Aarau Research Project ASTRA2007/011 (New Staffelegg Road) Location: North of Aarau 5.5% 6% Surface Strains DMS Deflection Acceleration-Sensors Thermo-couples 7

Tongji University China – MLS66/MLS11 MLS11 testing of thick asphalt pavement on a cement treated aggregate bases. The purpose was to establish a test method for a scaled pavement Findings from MLS66 testing on pavement on Congming Island using river sand for construction of Shanghai section of Chongqi highway ratified with saving of construction cost

Congming Island field test with MLS66 Tongji Univ

VTI Blacksburg MLS11 comparative study of with Turner Fairbank ALF performance Slabs extracted from field constructed pavements & transported to Blacksburg for testing The first findings were reported at CAPSA2015. An international synthesis of MLS tests presented at the recent 11th CAPSA in South Africa, It may be used as need be, subject to recognition of the paper being accepted and published by CAPSA Permission granted to copy paper The study is continuing with the remaining extracted slabs from the field. A paper was submitted to APT2016 for findings.

South Africa – MLS11 In the South African National Standard SANS series of Civil engineering test methods SANS 3001-PD1:2015 Edition 1 Determination of permanent deformation and moisture sensitivity in asphalt mixes with the MMLS3 is currently under final editorial review for publication. Individuals and entities related to the pavement industry (consultants, contractors, asphalt suppliers, highway and airport agencies and authorities) are using the proposed guidelines for all major highway asphalt pavements.

South Africa – cont In South Africa there are currently two commercial laboratories and a research laboratory at Stellenbosch University using the MMLS3. Details of the MMLS3 lab testing in SA for construction are contained in Tables 1. 14 Tests were for Airports 113 Tests were for Highways

Summary of MMLS3 Tests in Southern Africa and Australia