An expansion joint is the link between roads, viaducts and bridges
An expansion joint is a construction in the road surface that ensures that the movement in the joint between the road surface and a structure, such as a viaduct, bridge, culvert or fly-over, can be absorbed. It goes without saying that this must maintain and guarantee traffic safety. The movement of a structure is caused by various factors.
The most important factors and specific requirements for an expansion joint.
- Expansion and shrinkage due to temperature differences.
- The age of the structure; shrinkage and creep in recently poured concrete constructions.
- Load due to traffic, such as axle loads, vibrations, accidents, etc.
Specific requirements for expansion joints.
Rijkswaterstaat, the executive agency of the Ministry of Infrastructure and the Environment, issued a building requirement for expansion joints and they are included in standard RTD 1007-3.
There are different types of expansion joints.
SealteQ uses various types of expansion joints that each have their own specific application.
1. Single expansion joints
2. Bituminous expansion joints
3. Single low-noise expansion joints
The application of single expansion joints
This type of joint can be applied in motorways of traffic class 60 in new-build conditions and for the renovation of existing joints. The major benefit of this type of expansion joint is the relatively short time it takes to be built in.
By applying anthracite coloured, certified concrete mortar that is able to achieve the required compression strength in a short period of time, it is possible to replace part (up to12 m1) of an expansion joint in one night.
Applying this high-quality product therefore produces less nuisance for road users. The expansion construction can be replaced in a short period of time in nearly all cases. The expansion movement can be absorbed for spans of up to maximum 120 running metres.
A bituminous expansion joint – virtually noise free
If these joints are applied in the correct dimensions, they can do their job for 5-10 years in normal conditions.
SealteQ has the in-house capabilities to apply bituminous expansion joints professionally. The maximum span is 50 running metres. When the surface is laid on so-called rubber padstones, we do not recommend this type of expansion joint.
The joint consists of carefully selected grit that is given a bitumen cover in an asphalt mill. This heated grit is transported in a hot box to the work place.
At the work place, the grit is placed in the joint, and then a sinus plate is applied between the abutment and the bridge deck to be filled layer by layer.
The applied bituminous rock is penetrated with a bituminous emulsion until the top of the asphalt has been reached. This is then covered with wear-resistant grit, rolled down to create a smooth joint transition. Many kilometres of this type of joint construction have been applied throughout the Netherlands over the past few years.
The application of single low-noise expansion joints
SealteQ can supply this joint and build it in for you. Because of the special shape of the joint edges this is a comfortable joint for vehicles. The construction produces a minimum of contact and pulse noise.
This joint is based on a modern single joint with a rubber inlay. This type of joint can be applied in motorways of traffic class 60 in new-build conditions and for the renovation of existing joints.
The major benefit of this type of expansion joint is the relatively short time it takes to be built in.
It means less nuisance for road users and the environment without compromising on the quality of the product. A joint construction can be replaced in a short period of time in nearly every situation.