New construction and repair of Jetties with HPC and UHPC concrete

For modern jetty constructions, HPC / UHPC concrete offers many advantages compared to standard concrete, steel or wooden constructions.

All jetty elements can be prefabricated, cast or spray on site in a short time.
HPC / UHPC concrete has no or only extremely low pore volume and is thus absolutely seawater and corrosion resistant.
HPC / UHPC concrete hardens under water. It can therefore be processed in and under water.
HPC concrete has a standard strength between 80 MPa/11600 psi and 140 MPa/20300 psi.

UHPC concrete has a standard strength between 140 MPa/20300 psi and 240 MPa/34800 psi
HPC / UHPC prefabricated elements can be made considerably thinner due to the very high strength and the absence of porosity, and thus with significantly less weight.
Since HPC / UHPC concrete has very good wear and impact resistance, harsh harbor conditions and extreme environmental conditions such as ice are no problem.

Due to the properties of HPC / UHPC concrete listed above, such constructions do not require further inspection. It can be assumed that the service life is almost 100+ years.

Installation

HPC / UHPC concrete can be produced by us as mortar, casting compound or shotcrete mass. For processing, a compulsory or pan pot mixer is needed. Our shotcrete and castable HPC / UHPC material can also be pumped over longer distances. Repairs of damaged standard concrete, steel or wooden constructions Jetties can be severely damaged by impact, corrosion, rotting or faulty concrete processing. The repair with HPC / UHPC concrete is simple and requires little effort.

All structural elements above water can be easily protected against further rusting with HPC/UHPC shotcrete. Intensive cleaning of the reinforcement and subsequent protective coating is not necessary. With a layer thickness of just 15 mm / 1/2 inch of HPC/UHPC concrete, oxygen can no longer penetrate to the steel and where there is no oxygen, there is no corrosion.

For preparation, remove any loose particles and buildup such as clams, algae and the like.
A mold should be installed around the columns. The water does not have to be removed from the mold. The UHPC concrete is poured directly in the water. The concrete displaces the seawater from the mold. The mold can be removed after less than 48 hours. This type of repair has been used for more than 25 years as a standard repair method on offshore platforms.