This study investigated the performance of different materials in a micro-trench composite backfilling design. Laboratory tests were conducted to evaluate the effect of cold temperatures and freeze/thaw cycles on a cement grout and seven preparatory cold asphalt mixes. To compare the performance of cold mix asphalt and epoxy grout with hot mix asphalt as the host material, rutting tests and dynamic modulus tests at different loading frequencies and temperatures were conducted. Finally, laboratory scale micro-trench samples were prepared using different backfilling materials and were loaded using a wheel tracker after freeze/thaw conditioning. The results showed that cement grout could effectively be used to secure the conduit inside the trench. It was also concluded that using high-quality cold mix asphalt, a compatible material with hot mix asphalt, could improve micro-trench durability compared with epoxy grout.
Get full access to this article
View all access options for this article.
References
1.
AtalahA.Chang-JinC.OsburnK.Comparison Study of Installing Fiber Optic Cable in University Campuses Using Trenchless Techniques Relative to Open Cut. Pipelines 2002, American Society of Civil Engineers (ASCE), August4–7, pp. 1–17. https://doi.org/10.1061/40641(2002)70
2.
Duraline Technical Report, Recommended Procedures for Conduit Microtrenching and Restoration. Technical Bulletin: DCEB-10002, 2016, pp. 1–21.
Chorus. Deployment Standards Initiative Kelson Micro & Mini Trenching Pilot. DSI-28042011 Final, Ministry of Business, Innovation & Employment, Broadband and Mobile Initiatives, New Zealand, 2011.
8.
TrawickK. W.Improving Micro-Trenching: The Vision Becomes Reality. Broadband Magazine, Vol. 30, No. 6, 2009, pp. 92–93.
9.
VaseliH.Application of Micro-Trenching for Fiber to the Home. MSc thesis. University of Alberta, Edmonton, Alberta, 2015.
10.
HashemianL.RezaeeM.BayatA.Field and Laboratory Investigations on Pavement Backfilling Material for Micro-Trenching in Cold Regions. International Journal of Pavement Research and Technology, Vol. 10, No. 4, 2017, pp. 333–342.
11.
KonczakJ. J.Grout for Filling a Micro-Trench. Patent No. WO2012027534 A1, 2012.
12.
FastPatch DPR Rev 01 Technical Data Sheet. Willamette Valley Company, Eugene, OR, 2016.
ASTM C109/C109M-16a Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens). ASTM, West Conshohocken, PA, 2016, pp. 1–10.
15.
EZ Street Asphalt Product Information. EZ Street Asphalt, Canada, 2014, pp. 1–10.
16.
MCA Perma-Patch: Cold Mix, Product Data Sheet. Mac Asphalt, Toronto, ON, 2015, pp. 1–2.
17.
Product Information and Specification Sheet ProPatch™ (Permanent High Performance Cold Patch. Innovative Surface Solutions, Ajax, ON, 2011, pp. 1–2.
18.
QPR High Performance Permanent Pavement Repair Material, Material Specification. Quality Pavement Repair, Chattanooga, TN, 2014, pp. 1–3.
19.
Data Sheet UNIQUE® High Performance Fast Set Mortar. Unique High Performance Fast Set Mortar, Cleveland, OH, 2015, pp. 3–4.
Instant Road Repair® Safety Data Sheet. International Roadway Research, Humble, TX, 2015, pp. 1–6.
22.
WilsonT.Long-Term Monitoring of Pavement Maintenance Materials Test Sites. Report no. FHWA-RD-98-063. Office of Engineering Research and Development, Federal Highway Administration, McLean, VA, 1998.
23.
HattatogluF.HinisliogluS.BayataH. F.Modeling of Marshall Quotient of Hot Mix Asphalts by Artificial Neural Networks. Presented at the 1st International Conference on Engineering and Natural Sciences (ICENS), Skopje, Republic of Macedonia, 2015.
24.
AASHTO (American Association of State Highway and Transportation Officials). Standard Method of Test for Resistance of Compacted Hot Mix Asphalt (HMA) to Moisture-Induced Damage. T 283-14, Washington, D.C., 2014.
25.
ASTM (American Society for Testing and Materials). Standard Test Method for Pull-Off Adhesion Strength of Coatings on Concrete Using Portable Pull-Off Adhesion Testers. D7234, West Conshohocken, PA, 2012.
26.
AASHTO (American Association of State Highway and Transportation Officials). Determining the Dynamic Modulus and Flow Number for Hot Mix Asphalt (HMA) Using the Asphalt Mixture Performance Tester (AMPT). AASHTO TP79-09, Washington, D.C., 2009.
27.
AASHTO (American Association of State Highway and Transportation Officials). Developing Dynamic Modulus Master Curves for Hot Mix Asphalt (HMA) Using the Asphalt Mixture Performance Tester (AMPT). AASHTO PP61-09, Washington, D.C., 2009.
