Waterproofing and Protection of Sewage Facilities
Sewage facilities like treatment plants, masonry or concrete channels, and manholes can be seriously damaged due to moisture and attack of aggressive ions. When pores and capillaries are left open for chloride penetration, the steel bars corrode causing spalling of the concrete. Areas with reduced air circulation generate high levels of sulfur dioxide, which can affect the integrity and durability of the concrete. Damages commonly encountered in sewage structures include corrosion, carbonation, alkali-silica reaction, cracking by freeze-thaw cycles, and structural weaknesses. Damaged concrete leads also to contamination of soil through seeping of sewage water into the surrounding media.
The refurbishment systems used to waterproof and protect sewage facilities need to take into account several parameters such as the formation of aggressive microclimates in sealed holding tanks, variations in liquid levels and composition, which may include rainwater, wastewater, or household/industrial sewage, and the degree of contamination on the environment.
Holderchem offers effective products to waterproof and protect sewage facilities from such damaging effects. The proposed products are designed to handle both new and refurbishment works. The figures herein below describe typical areas of application and include trade names of the Holderchem products and their consumption rates:
- Refurbishment of sewage concrete pipes (Fig. 1).
- Treatment of manholes and inspection shafts (Fig. 2).
- Protection of treatment sewage plants (Fig. 3).
- Protection of masonry and concrete channels (Fig. 4).
Statement of Responsibility: The information and application advice contained in this document are based on the present state of scientific and practical knowledge of Holderchem SAL. It is provided with no warranty, implied or otherwise, as to its completeness or accuracy. Since methods and conditions of application and use are beyond the control of Holderchem, HOLDERCHEM MAKES NO WARRANTIES, IMPLIED OR OTHERWISE, AS TO THE MERCHANTABILITY OR FITNESS FOR ORDINARY OR PARTICULAR PURPOSES OF ITS PRODUCTS AND EXCLUDES THE SAME. Holderchem warrants that its products shall be of sound materials and workmanship. As products are applied, handled and stored in manners and site conditions over which Holderchem has no control, Holderchem's liability in respect of any material which can be proven defective shall be limited to the replacement of such defective material or reimbursement of its cost at Holderchem's option. Holderchem shall not be liable for any consequential or incidental damage or loss arising out of the use of its products. Important Note: Holderchem shall have the right to modify product specification sheets at any time without previous notice. Buyers should always refer to the most recent data sheets, copies of which can be supplied upon request. The sale of products mentioned in this literature shall be subject to Holderchem's General Conditions of Sale Delivery and Payment.
Holderchem R&D seeks to develop solutions to meet construction challenges by bringing to market innovative products and systems, which offer benefits across the complete life cycle of buildings and other constructions. The aim is to supply customers with high-performance products to help them achieve better productivity, lower overall costs, and achieve extended service life and functionality. Research also aims at developing the Holderchem range of Batimix® products with a particular focus on polymer emulsions, polymer-inorganic interactions, and product applications.