Cement Americas

FAL 2018

Cement Americas provides comprehensive coverage of the North and South American cement markets from raw material extraction to delivery and tranportation to end user.

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40 CEMENT AMERICAS • Fall 2018 • www.cementamericas.com FEATURE C ement is the world's most prevalent manmade mate- rial, with approximately 0.56 tons produced annu- ally for every person on Earth. It binds concrete, which is used to construct much of the built environment – includ- ing homes, schools, offices, roads, runways, tunnels and bridges. Industrial production accounts for around 21 percent of all greenhouse gas emissions attributed to human activ- ity (IPCC 2014). Of this, nearly a quarter, or 5 percent of global emissions, comes from cement production (WBCSD CSI) – making the industry among the largest contributors to climate change. Of the cement industry's emissions, around 50 percent can be attributed to the calcification process itself, 40 percent to fuel used in heating the kiln, and the remaining 10 percent for grinding and transport (WBCSD CSI). Because the cement industry has historically been a major contributor to greenhouse gas emissions, there is an opportunity today to significantly reduce emissions through efficiencies and innovations within the sector. GCP Applied Technologies said it can play an important role through its leadership in the use of connected devic- es. Verifi technology uses sensors, data analytics and auto- mated inputs to not only save customers time and money, but also to significantly reduce their carbon footprint. How Verifi Technology Works Verifi is a system of sensors and devices that manage the flow rate (slump) of a concrete shipment from the ready- mixed plant to the job site. While in transit, the system per- forms several key functions. • It controls concrete mixing, using only the necessary number of drum rotations and harnessing excess energy from the truck's engine whenever possible. • It measures the flow rate of the concrete, and can pro- vide precise injections of water and admixtures to achieve the specified slump upon arrival at the job site. • Verifi software tracks the movement of the truck along its route, identifying opportunities for improved fleet efficiency. Together, these functions significantly reduce the time it takes to deliver concrete, allowing more product to be delivered with the same number of trucks and drivers. VERIFI also conserves materials by delivering concrete that consistently meets specifications, thereby avoiding rejected loads. Consistent quality allows for more efficient mix designs, i.e. with lower cement content and/or higher supplemen- tary cementitious material content. These efficient mix designs can radically reduce cement use, leading to further cost savings and environmental benefits. The environmental benefits of the Verifi technology can be thought of in three categories: 1. Cement reduction. Various stakeholders in the produc- tion of concrete often add water to achieve the specified slump, but this can weaken the concrete – in some cases leading to concrete placement that eventually fails testing and must be torn out. To avoid such costly scenarios, concrete mixes are routinely "overdesigned" to include more cement than truly need- ed, in order to compensate for the addition of water. A con- servative estimate is that 5 percent of the cement included in the design of a concrete mix is included only to hedge against these issues. Through precise and reliable quality control, Verifi can reduce the overdesign needed to consistently meet a given performance specification. 2. Waste reduction. The National Ready Mixed Concrete Association (NRMCA) estimates 5 percent of ready-mixed concrete deliveries in the United States are rejected at the Eco-Efficiency in Cement and Concrete Advancing Sustainability with Connected Devices By Matthew Nazarenko

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