ROTEC: Lightweight aggregates
taken from nature

12,500 years ago, a giant volcano erupted on the edge of the Neuwied basin. Today, its traces are visible around Laach Lake, the crater of the former volcano, including extensive deposits of natural pumice.

In the region, Rotec operates open-pit quarries to extract the naturally expanded silicate rock. The company is a member of the Bisotherm sales organization. It uses special processing, separation and drying processes to produce high-tech lightweight aggregates from the silicate rock. Among other industries, these aggregates are in high demand in the dry mortar and construction chemicals sectors.

 

Pumice “Made in Germany”

Pumice is found around the world. Deposits are also located in countries other than Germany, such as the United States, Mexico, Turkey, Greece and Italy. However, the silicate...

Related articles:

Issue 04/2020 Submitted by: Burkhard Schuller Baustoffservice

Early-strength lightweight concrete made of volcanic rock

Lava lightweight concrete, developed by the company Burkhard Schuller Baustoffservice, is a mix of volcanic rock: e.g., of zeolite, pumice and lava. Volcanic rock can be used without additional energy...

more
Issue 04/2021 PHILIPP GRUPPE

Flat anchors for lightweight concrete sandwich elements

Classical systems for connecting, as a general rule, three-layer sandwich elements, such as flat anchors, sleeve anchors or SPAs, as well as plastic-based systems are approved without exception for...

more
Issue 08/2020

Replacing natural sand by crushed rock in concrete using nonlinear modelling

There is a lot of pressure to stop using natural sand and instead use crushed rock or recycled aggregate in concretes. However, crushed rock tends to have sharp corners, which affect not only the...

more
Issue 02/2020 Lightweight aggregate concrete with open structure

Structural capacity of self-supporting wall panels made of LAC

Lightweight concrete with open structure and lightweight aggregate is increasingly used for the construction of façades due to its excellent thermal insulation properties. Pumice, which occurs...

more
Issue 08/2009 A number of advantages

SCC with lightweight aggregates

Self-compacting concrete can be processed purely under the impact of gravity and without any vibration, even in densely reinforced false work or complex geometries.  For this purpose, the concrete...

more