THE MOST ADVANCED ROAD SEALANTS AND BRIDGE EXPANSION JOINTS
LAMG's technology is based on shape memory polymers (SMPs), revolutionary polymer materials that have the ability to return to a 'programmed' shape through an external stimulus, such as temperature. SMPs were first discovered in 1941 and first utilized in commercial applications as heat-shrink tubing. Initially, one-way shape memory activity was shown, where temperature would result in the shape change, but the shape change was not reversible or recoverable. LAMG's road sealants and expansion joints are based on decades of research into two-way shape memory polymers, that can change shape at a programmed temperature and then recover their initial shape one the temperature stimulus has been removed. This allows for the materials to change their shape to counteract the temperature cycling that all roads and bridges undergo throughout the day. The materials maintain gap separation better and do not suffer from bulging, outperforming all other road sealants in the process. LAMG's materials are described in further detail below.
At LAMG, we aim to provide cost-effective sealants capable of sealing expansion joints and cracks in a variety of essential transportation infrastructures, ranging from concrete pavements to bridge decks. Due to the need to maintain and extend the structural service lives of these infrastructures to accommodate the increasing flow of traffic, developing high-performing and long-lasting sealants is now more in demand than ever before. We have designed a smart two-way shape memory polymer-based sealant that is capable of counteracting the thermal movements of the jointed structural elements in commonly-used transportation infrastructures, specifically by contracting upon heating and expanding upon cooling. In addition, this type of sealant has the necessary mechanical properties and durability to survive repeated traffic loads as well as the ambient temperature fluctuations of the outdoor environment. Even more, our sealants not only have beneficial impacts on transportation infrastructures but also have long-term enduring impacts on various other structures such as driveways, parking lots, dams, harbors, buildings, swimming pools, etc.
SBIR Funding from NSF