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BASF Introduces PUR-based Waterproofing System for Safer Bridge Decks

Published on 2011-12-07. Author : SpecialChem

Tokyo, Japan -- BASF Pozzolith has launched a new polyurethane-based waterproofing system whose improved adhesion properties will help ensure safer bridge decks.

The new system, developed in Japan, is a modification of the long-established Conibridge System, which has been used successfully for more than 30 years in Europe and complies with the German Federal Institute of Road Affairs standard ZTV-BEL-B Teil3. Focusing on the improvement of adhesion property, the new system has achieved compliance with the national NEXCO (Nippon Expressway Company Ltd.) waterproofing system standard for bridge decks as of mid 2011.

Mr. Takahiro Ikeda, Managing Executive Officer, General Manager of Marketing and Communications, BASF Pozzolith said, "We aim to help make bridge deck systems even safer. Therefore we conducted comprehensive tests with a combination of repeatedly modified adhesives and high quality polyurethanes, and we finally succeeded in developing the most suitable waterproofing system for bridge decks. Because this system uses pavement adhesives and the same quality materials as in asphalt pavements, we are able to achieve extremely reliable adhesion performance."

The new Conibridge System also reduces volatile organic compounds (VOC) and does not contain heavy metals. The new Conibridge System is three-layer hybrid structure consisting of spray type PU waterproofing materials, a PU binder for improved adhesion and a special modified asphalt base of pavement adhesive. This ensures waterproof performance and prevents corrosion in reinforcements, concrete peeling and cracks caused by rain and chloride penetration or car vibrations. Through these enhancements, the new system enables a longer life span for the structure. Moreover, when renovating aged asphalt pavement, the pavement adhesive of Conibridge System is remelted through heating and waterproofing layer is maintained in good condition also contributing to a longer life cycle.

"The new Conibridge System makes bridges safer and helps contribute to reducing the total maintenance cost," continued Ikeda.

About BASF Pozzolith

BASF Pozzolith is a leading supplier of construction chemicals in Japan. It was formed by merging BASF Japan's three affiliated companies for construction chemicals. The affiliated companies were NMB, established in 1960 and the leading company in development and manufacturing of admixture materials and building material products for concrete, Pozzolith Bussan, the top supplier in Japan of chemical admixtures for concrete, and BASF Construction Systems, which sells various building material system products. In total, BASF Pozzolith supplies a full range of construction chemicals from concrete admixture products such as superplastisizer and air-entraining water reducing agent to a variety of building construction materials such as high-performance nonshrinkage grouts, repair and protection products for concrete, waterproofing products as well as performance flooring. BASF Pozzolith has 17 production sites and 16 sales offices nationwide.

About the Construction Chemicals division

BASF's Construction Chemicals division is the leading supplier of chemical systems and formulations for the construction industry. Continuous innovation and tailor-made solutions ensure its customers are more successful. Its Admixture Systems business unit specifically helps customers in the ready-mix, precast, manufactured concrete and underground construction industries. The Construction Systems unit offers a wide range of products for sports and industrial flooring, external renders and wall insulation, expansion joints, wood preservatives as well as specialist repair mortars, tile adhesives and waterproofing membranes. The division operates production sites and sales centers in more than 50 countries and achieved sales of about ??2.1 billion with approximately 6,900 employees in 2010.

About BASF

BASF is the world's leading chemical company: The Chemical Company. Its portfolio ranges from chemicals, plastics, performance products, and agricultural products to oil and gas. As a reliable partner BASF creates chemistry to help its customers in virtually all industries to be more successful. With its high-value products and intelligent solutions, BASF plays an important role in finding answers to global challenges such as climate protection, energy efficiency, nutrition and mobility. BASF posted sales of more than ??63.9 billion in 2010 and had approximately 109,000 employees as of the end of the year.

Source: BASF


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