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2016FallShotcreteEMag

New Products & Processes GCP Applied Technologies Introduces TYTRO® Admixture System for Shotcrete Applications GCP Applied Technologies Inc. has introduced the TYTRO® Shotcrete System, a complete state-of-the- art admixture solution that makes shotcrete for underground construction better, faster, and less expensive than conventional systems available today. The TYTRO System includes a nanotechnologybased rheology control agent, patented macro synthetic fibers, and a number of other newly developed admixtures that enhance productivity of the spraying operation and material performance. “Our TYTRO Shotcrete System provides improved agility and additional capabilities that applicators and global contractors have been demanding for decades,” said Adam Grose, President, Specialty Construction Chemicals, GCP Applied Technologies. The TYTRO Shotcrete System provides underground construction professionals with the capability to reduce operating costs and minimize excavation downtime without sacrificing performance or relaxing safety standards. The TYTRO Shotcrete System provides faster early strength and enhanced bonding-to-rock with an increased one-pass thickness buildup. The system also minimizes rebound during spraying. Main advantages* provided by the TYTRO Shotcrete System compared to conventional mixtures include: • Up to 10% lower installed cost achieved through mixture optimization, waste minimization, and shorter cycle times; • Rebound rates reduced to 5 to 8%; • Faster re-entry times due to more rapid early-age strength development at equal accelerator dosage rate; • Superior bond-to-rock and adhesion between layers, providing greater thickness in one pass; and • More robust and dosage-efficient system. “Our technical specialists have analyzed the unique challenges of underground construction projects to create customized mixture designs, delivering the most optimized and cost-efficient concrete mixture for each project. We also support our customers with world-class site support and training,” said Grose. The TYTRO Shotcrete System includes the following products: • TYTRO WR: High-range water-reducing admixtures for shotcrete that provide superior flow, prolonged slump life, and excellent plasticity, maximizing strength performance by allowing a lower water-cementitious materials ratio (w/cm); • TYTRO HC: Cement hydration control admixture, extending the working life of shotcrete up to 72 hours; • TYTRO RC: Innovative pozzolan-based rheology control admixture that is designed to reduce installed material cost when used as a replacement for silica fume or other cementitious materials. It provides faster early strength, superior bond-to-rock, enhanced sprayability, lower rebound, and reduced cycle times; • TYTRO SA: Latest generation of high-performance, alkalifree set accelerators, specifically formulated to provide high early strength at low dosage rates and improve productivity by shortening the time of setting without compromising long-term strength and durability; • STRUX® BT: Macrofibers featuring a patented design developed for underground shotcrete applications and offering superior flexural toughness and post-crack energy absorption; • TYTRO AE: Air-entraining admixture for use in shotcrete mixtures to protect against damage from freezing-andthawing cycles; and • TYTRO RM: Rheology-modifying and mixture-enhancing admixtures formulated to improve the pumpability and sprayability of the shotcrete mixture. GCP’s complete portfolio of solutions for the mining and infrastructure tunneling industries includes admixtures for shotcrete and concrete, proprietary fiber reinforcement systems, injection technologies for ground support, and waterproofing systems for shotcrete. The company combines its technical expertise in shotcrete mixture design optimization, on-site monitoring systems, and ground control technologies to fit to every project’s unique needs. GCP’s technical specialists work to provide solutions to overcome project geotechnical challenges around the world. Through applied knowledge and service excellence, GCP Applied Technologies provides premier specialty construction chemicals and specialty building materials for many of the world’s most renowned structures, and packaging technologies for the best-known consumer brands, delivering results for all its customers. With customers in 110 countries, operations on six continents, and a team of approximately 2850 employees, GCP Applied Technologies had a 2015 net sales of US $1.4 billion. Formerly part of the W.R. Grace & Co. Group, GCP Applied Technologies Inc. became a NYSE-listed company (GCP) in February 2016, headquartered in Cambridge, MA, USA. More information is available at GCPAT.com. *Referenced results are based on internal and external test data. Results may vary due to temperature conditions, mixture design, cementitious materials content, and aggregate gradations. 56 Shotcrete • Fall 2016


2016FallShotcreteEMag
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