Reducing drying energy and costs by process alterations at aggregate stockpiles

Thijssen, Geert; Schott, Dingena L.; Demmink, E.; Lodewijks, Gabriël

doi:10.1007/s12053-010-9093-3

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…Fine and coarse aggregate stockpiles should be treated differently as they do not behave similarly when exposed to rain. In a study conducted in an asphalt-mix plant (Thissen, 2010) it was observed that river sand loses moisture while recycled asphalt gains moisture with time.…”

Section: Cold Weather Concretingmentioning

confidence: 99%

“…The opposite would be true for aggregates which gain moisture over time. These two measures are reported to have decreased heating costs significantly (Thissen, 2010). Although these savings are based from a case study of an asphalt-mix plant where aggregates need to be dried prior to their use, the same measures could be applied to aggregates that gain or lose moisture in the concrete industry to keep the aggregate water content low and decrease the energy use for heating aggregates during the cold periods.…”

Section: Cold Weather Concretingmentioning

confidence: 99%

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Energy Efficiency Improvement and Cost Saving Oportunities for the Concrete Industry

Kermeli¹,

Worrell²,

Masanet³

2011

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The U.S. concrete industry is the main consumer of U.S.-produced cement. The manufacturing of ready mixed concrete accounts for more than 75% of the U.S. concrete production following the manufacturing of precast concrete and masonry units. The most significant expenditure is the cost of materials accounting for more than 50% of total concrete production costs -cement only accounts for nearly 24%. In 2009, energy costs of the U.S. concrete industry were over $610 million. Hence, energy efficiency improvements along with efficient use of materials without negatively affecting product quality and yield, especially in times of increased fuel and material costs, can significantly reduce production costs and increase competitiveness.The Energy Guide starts with an overview of the U.S. concrete industry's structure and energy use, a description of the various manufacturing processes, and identification of the major energy consuming areas in the different industry segments. This is followed by a description of general and process related energy-and cost-efficiency measures applicable to the concrete industry. Specific energy and cost savings and a typical payback period are included based on literature and case studies, when available. The Energy Guide intends to provide information on cost reduction opportunities to energy and plant managers in the U.S. concrete industry. Every cost saving opportunity should be assessed carefully prior to implementation in individual plants, as the economics and the potential energy and material savings may differ.

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Section: Cold Weather Concretingmentioning

confidence: 99%

Section: Cold Weather Concretingmentioning

confidence: 99%