Concrete Products

NOV 2018

Concrete Products covers the issues that attract producers of ready mixed and manufactured concrete focusing on equipment and material technology, market development and management topics.

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50 • November 2018 In anticipation of the European Union's new legislation of mandating blind spot safety for all heavy-duty vehicles, Boise-based PRECO Electron- ics launched an enhanced version of its PreView Side Defender optimized specifically for aftermarket users. Side Defender's advanced technology has been successful with OEMs since 2016, notes the company, and the updated solution provides a powerful and affordable option with ease of installation for retrofits. The Side Defender is able to detect moving cyclists and cars in the side blind zones, while filtering out stationary objects. The updated radar system is a self-contained solution equipped with a 150-degree viewing angle and a new display. The system actively warns operators with audi- ble and visual alerts, in order for them to take the appropriate actions to mitigate collisions. Additionally, it has the ability to integrate with telematics applications, vehicle control systems, vision systems or other sensors using industry standard communications. Industry standard CAN bus integration allows Side Defender to read the vehicle's speed messages. Through this integration, the radar can operate intelligently in different detection modes: Highway, alerts operators of vehicles in the side blind zones while ignoring stationary objects such as guardrails to reduce nuisance alerts; and Slow-Speed, designed to reduce the incidence of collisions with pedestrians and cyclists in urban environments. PRECO's customers continue to see up to an 85 percent reduction in blind zone incidents after installing PreView radar systems. Keeping pace with the evolving needs of the industry, PRECO's engineering team proudly continues their innovative advances in new safety technologies. By providing trucks, buses, construction equipment, and mining machines with side and rear radar systems, PRECO strives to mitigate risk, while eliminating accident-related injuries and fatalities through active blind spot monitoring. — PRECO Electronics, 866/977-7326; RADAR-ENABLED TRUCK SAFETY DEVICE OPTIMIZED FOR AFTERMARKET Available globally, PreView Side Defender is designed, en- gineered and manufactured to protect heavy-duty equip- ment fleets, their operators, and those around them. ConBlock CDA contains pure silicon dioxide dispersed in a proprietary liquid that densifies and waterproofs concrete. Against reference mix designs, users can anticipate a faster set with less bleed water and earlier strength gains, owing to accelerated cement hydration, plus higher 28-day compressive strength. The reduction in surface bleed- ing allows for faster finishing and a more durable slab or structure. Higher early strengths allow for faster form removal, saving time in the plant and at the job site, while reduced permeability improves resistance to sulfuric acid and other harmful chemicals. Concrete Sealants tested ConBlock CDA in an independent labora- tory using the U.S. Army Corps of Engineers Standard CRD C48-92 to 200 psi for 28 days. Treated specimens did not allow water to pass. In addition, the agent reduced the water penetration of a 6,000-psi control concrete by 32 percent. Further studies indicate ConBlock CDA outperforms traditional crystalline powder admixtures as measured in ASTM C1585, Standard Test Method for Measurement of Rate of Absorption of Water by Hydraulic-Cement Concretes. ConBlock CDA can be set up for automated dosing in most batch plants. Typical dosage is 22 ounces per 100 lbs. of portland cement, although certain mix designs and applications can warrant up to 40 ounces per CWT. As a liquid, the admixture improves safety by reducing the opportunity for release of silica-bearing powder into work areas. It suits cast-in-place or precast concrete specified for bridges and highways, parking structures, water containment tanks, foundations, tunnels, as well as a host of below-grade structures where watertight integrity is critical. ConBlock CDA joins the com- pany's full line of sealants, extruded sealing tapes, primers, wraps, waterstops, coatings, mastics, lubricants, surface hardeners, water repellents, and antimicrobial admixtures. ConSeal products are used to assemble and seal precast concrete pipes, manholes, box culverts, septic tanks, burial vaults, structures, buildings and components of all types. — Concrete Sealants Inc., Tipp City, Ohio, 800/332-7325 or 937/845-8776; ConBlock CDA has a 12-month shelf life in a dry environment with temperatures above 40°F, and is packaged in 5-gal. pails, 50-gal. drums or 264-gal. totes. Concrete densifying admixture Available in 24-in. square, 24- x 30-in. or 24- x 36-in. sizes, the Air Pass Mud Flap offers weight reduction poten- tial of 60 percent or more when compared to conventional rubber flaps, which can create drag when winds hit a truck or trailer. Using computational fluid dynamics testing, company engineers measured a 0.4 percent fuel savings on vehicles fitted with Air Pass Flaps versus a conventional flap-bearing bearing control. The former are made with an engineered, high impact Nylon compound that can withstand exposure down to -70°C, and can be customized with logos or other operator graphics. — Nu-Line, Hamilton, Ontario, 866/837-2082; Lightweight mud flap INNOVATIONS EQUIPMENT & PRODUCTS

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