Together with Porr Bau GmbH, MC Bauchemie has developed a new TBM backfill grout based on a geopolymer that is suitable for use in swelling rock formations. This cementless annular gap filler prevents swelling pressures, is sulphate-resistant and provides a permanent bedding for securing the tunnel tube.
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机译：MC Bauchemie与Porr Bau GmbH共同开发了一种新型的TBM回填灌浆，该灌浆基于一种地质聚合物，适用于膨胀岩层。这种无水泥的环形间隙填充物可防止膨胀压力，耐硫酸盐并提供永久性的地层以固定隧道管。
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