Pavement Preservation Journal - Spring 2015 - (Page 36)

In California, Scrub Seals Gain Favor for Cost, Crack Sealing By Phil Vandermost A lthough an ounce of prevention is worth a pound of cure, even Ben Franklin might have found himself in a quandary, faced with responsibility for an aging road network that is "de-investing" faster than it can be maintained. While a variety of inexpensive pavement preservation tools are available to agencies to correct initial signs of distress, treatment options become more limited and the cost of restoring asphalt pavement to acceptable condition increases exponentially as surface cracking becomes widespread, and moisture is allowed to penetrate to the road's subgrade. As cracking becomes more extensive, the window of time narrows for an agency to act and avoid costly reconstruction, resurfacing or recycling. More agencies that have pavements left untreated due to reduced funding and conflicting priorities are turning to a preservation treatment called the scrub seal. In the past several years, major California county public works agencies - including Los Angeles, Riverside, San Bernardino and San Diego counties - have placed scrub seal in their permanent "tool For Escondido, Calif., scrub seal, polymer modified emulsion is placed in advance of trailer with brushes that will work emulsion into pavement; chips will follow 36 box" of annual pavement preservation strategies. In addition to California, scrub seals are successfully performed by agencies throughout the United States, including Texas, Michigan, Indiana, Ohio, Arizona, Nevada, New Mexico, Tennessee and Utah. According to the Los Angeles County Department of Public Works, a scrub seal is an application that is very close to a chip seal treatment, in which asphalt emulsion and crushed stone are placed on an asphalt pavement surface. The difference is that the asphalt emulsion is applied to the road surface through a series of brooms placed at different angles, which helps push the asphalt emulsion down into the cracks and ensure they are better filled, creating a better seal. When chips are applied to the emulsion, the pavement is further sealed. SCRUB SEAL IN ESCONDIDO Cities such as the San Diego-area City of Escondido are expanding the use of scrub seal to address deteriorating pavements. Escondido recently gained industry attention for its innovative FY 2013-14 street maintenance project, which relied heavily on the scrub seal as a tool for protecting and extending the service life on many of its local arterial roads. As part of the project, Escondido applied approximately 240,000 sq. yd. of scrub seal treatment on nine city roadways that would have soon otherwise become candidates for reconstruction. The treatment consisted of an application of PASS CR polymer modified rejuvenating View past issues of the Pavement Preservation Journal online at

Table of Contents for the Digital Edition of Pavement Preservation Journal - Spring 2015

President’s Message
Hot, Cold In-Place Recycling Gets Boost at Western States Conference
Fort Collins HIR Project Provides Delegates with Up-Close Look
NCAT Reports 2012 Cycle Results, 2015 Preservation Activities
New Congress Means New Push Toward Reauthorization
FP² at TRB
Pavement Preservation in Spotlight at World of Asphalt 2015 in March
Control Potholes by Sealing Cracks, Joints in Advance
‘Thinlay’ Asphalt Overlays Next Word in Pavement Preservation
Texas Considers Ultra-Thin HMA Alternatives to Seal Coats
Thin Overlays Can Preserve Pavements as Well as Reduce Surface Noise
In California, Scrub Seals Gain Favor for Cost, Crack Sealing
IGGA Recognizes Leaders in Grooving, Grinding
Index of Advertisers

Pavement Preservation Journal - Spring 2015