w&p Kalk GmbH is the operating holding company of the Lime business segment and one of around 80 successful companies in the Wietersdorfer Group. At the Peggau site, limestone was already mined 125 years ago and fired in two shaft kilns since 1900. In 1994– as part of the acquisition of Styrian Montanwerke – the lime plant became part of the Wietersdorfer Group.
Today, limestone is produced in a state-of-the-art and energy-efficient GGR Maerz kiln.
Lime is fired in Peggau for various industries and applications. In the construction industry, lime is used in various forms for soil stabilization, in road construction and in building construction – predominantly as lime hydrate.
In the field of environmental protection, lime is used to treat drinking and service water and to purify exhaust gases.
w&p produces lime products for agricultural applications, among other things for soil fertilization, as feed additive or for disinfection. In the industrial sector, the steel and paper industries are major buyers of calcined lime. Lime is very versatile in its properties and applications, and these are just a few areas of application.

The lime activities of Wietersdorfer in Croatia are concentrated at INTERCAL d.o.o. The company (formerly LTV d.o.o.) was transferred in 2011 by Salonit d.d. to w&p Kalk GmbH in order to give the Lime business segment the opportunity to take strategic decisions independently – by its own management board.
INTERCAL d.o.o. is based in Sirac, where the main plant is also located. A second plant is located in Ličko Lešće, halfway between Rijeka and Zadar. With its dolomitic limestone deposits, the company enjoys a unique position: this product is highly sought after by the steel industry for process engineering applications. As a lime hydrate, dolomitic lime is characterized by excellent processability as a building material.

IGM Zagorje (Industrija Gradbenega Materiala Zagorje d.o.o.) is located, as its name suggests, in Zagorje ob Savi, about 60 kilometers east of Ljubljana. The history of IGM dates back to 1804. The company’s acquisition by Salonit d.d. in 2005 made it part of the Wietersdorfer Group and, since 2014, IGM Zagorje has been a subsidiary of w&p Kalk GmbH.
Today, IGM produces calcitic and dolomitic limes for ecological and technological applications. Calcined lime is used in the iron industry, in the production of aerated concrete blocks and for wastewater treatment. In Zagorje, limestone hydrate and lime paint are also produced for building construction. Coarse and fine lime mortar, and limestone flours are also produced here, the latter for use in agriculture and forestry.