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  • Reliability-based life-cycle-cost comparison of different

    Reliability-based life-cycle-cost comparison of different

    May 01, 2019 According to the Federal Highway Administration (FHWA), the annual direct cost of corrosion of RC bridges in United States was more than $8.3 billion in 2002, and it also reports the tremendous indirect costs to the users due to traffic delays and lost productivity, which can be as high as 10 times that of direct corrosion costs . Therefore, to

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  • Cement and Concrete Sustainability - PCA

    Cement and Concrete Sustainability - PCA

    Long life- Concrete structures are long-lived, such as pavements that have an average service life of 30-50 years.; Low life-cycle cost - Concrete consumes minimum materials, energy and other resources for construction, and requires little to no maintenance throughout its service life.; Safety and reliability - Concrete does not rust, rot or burn. . Concrete pavements are less susceptible to

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  • Investigation of recycled concrete made with limestone

    Investigation of recycled concrete made with limestone

    According to Chini and Kuo (3), 35 state agencies in the United States are currently using RCA in pavement construction. Although many studies on RCA as base course have been conducted, there are still some issues that need further investigation, such as tufa forma-tion of RCA in granular base, long-term performance, and life-cycle cost

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  • Equipment focus: Crushing costs and making gains

    Equipment focus: Crushing costs and making gains

    Nov 11, 2014 However, David McAfee was not in the market for another crusher. To convince the recycler, the team demonstrated a Sandvik QI240 PriSec mobile impact crusher. The demonstration and subsequent analysis showed that while the overhead of a second machine had been added to the crushing process, the cost per ton of crushed concrete decreased

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  • The Environmental Impact of Recycled Concrete

    The Environmental Impact of Recycled Concrete

    mainly of crushed concrete and asphalt pavement (Goonan, 2000). According to the same author, natural aggregates corresponded to 36% of total raw materials produced by United States in 1900. There was a growth in production along six decades, which increased the proportion of natural aggregates up to 70% respect to the total raw materials

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  • Using pulverizer attachments to simplify concrete

    Using pulverizer attachments to simplify concrete

    Dec 17, 2019 ‘Tis the season for merrymaking, gift giving and goodwill. Alongside all the celebration that comes this time of year, the economy sees a major boost during the holidays as North America spends more money on consumable products. In the United States alone, seasonal retail sales in 2019 are expected to surpass $1 trillion for the first time

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  • RECYCLING AGGREGATE - MB S.p.A

    RECYCLING AGGREGATE - MB S.p.A

    Demolition, construction and excavation debris, mainly consisting of cement, iron, steel, earth, rocks, concrete, plaster, bricks, tiles, ceramics and more, are particular waste that translates into significant transport, disposal and treatment costs.The difficulty of their management is enhanced by the severe problems related to pollution, noise and dust caused by their transformation

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  • Structurally Deficient Bridges | Bridge Infrastructure

    Structurally Deficient Bridges | Bridge Infrastructure

    Overview of Bridges. There are more than 617,000 bridges across the United States. Currently, 42% of all bridges are at least 50 years old, and 46,154, or 7.5% of the nation’s bridges, are considered structurally deficient, meaning they are in “poor” condition.Unfortunately, 178 million trips are taken across these structurally deficient bridges every day

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  • Evaluation of the use of crushed returned concrete as

    Evaluation of the use of crushed returned concrete as

    Ref. [3] estimates that in the United States, 415 million cubic meters of concrete returned to RMC plants in 2006 (1.4% of the produced concrete). A major issue is concrete returned from the job site to the RMC plant inside the concrete truck drum, usually called returned concrete (RC), which in Brazil represents 45% of the waste RMC [1]

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  • How Cement Is Made

    How Cement Is Made

    Cement is so fine that 1 pound of cement contains 150 billion grains. The cement is now ready for transport to ready-mix concrete companies to be used in a variety of construction projects. Although the dry process is the most modern and popular way to manufacture cement, some kilns in the United States use a wet process

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  • Energy-consumption and carbon-emission analysis of

    Energy-consumption and carbon-emission analysis of

    Oct 12, 2010 An important component of the model, a weight-based distribution function of materials and associated transformation processes (casting, stamping, etc.), is developed from the United States Council for Automotive Research Generic Vehicle Life Cycle Inventory Study

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  • Optimization of Sandstone Concrete Pavement Materials

    Optimization of Sandstone Concrete Pavement Materials

    Apr 08, 2021 The life cycle cost analysis is based on an economic analysis and is a means of evaluating the long-term economic efficiency of ... Johnston, RI, United States). Results. ... to provide a theoretical basis and parameter value ranges for the subsequent optimization analysis of the life cycle of the sandstone concrete composite pavement structure

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  • Asphalt Paving Design Part I: The Advantages of Using

    Asphalt Paving Design Part I: The Advantages of Using

    Jul 16, 2020 The Federal Highway Administration has shown that a dollar spent on asphalt pavements goes 26.9 percent further than a dollar spent on concrete pavements. Asphalt is a cost-effective choice because it has a lower first cost than concrete and can be constructed as a perpetual concrete. This results in a lower user cost

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  • Life Cycle Assessment of a Rock Crusher

    Life Cycle Assessment of a Rock Crusher

    crusher life cycle stages and the use phase. ... to its customers byreducing the crusher operating (mainly electricity) costs. Introduction to LCA ... In the United States as well as in Europe, the emphasis has gradually broadened from a site-specific focus to include a product-specific focus

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  • Life Cycle Thinking | Concrete Sustainability Hub

    Life Cycle Thinking | Concrete Sustainability Hub

    Life Cycle Thinking. Together, transportation and building operation accounts for over two-thirds of energy consumption in the United States. The design of the supporting infrastructure —primarily roadway pavements, and residential and commercial buildings — can play a significant role in improving the sustainability of these operations

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  • Pavements Life Cycle Assessment (LCA) | Concrete

    Pavements Life Cycle Assessment (LCA) | Concrete

    Related Research Briefs. Life Cycle Carbon Uptake of the United States Pavement Network (January 2021); Impact of Use Phase in Pavement Life Cycle Assessment: A Case Study of Alternative Designs in Different Contexts (April 2014); Key Drivers of Uncertainty in Pavement LCA (November 2012); Comparative Pavement LCAs With Uncertainty (June 2012); Network, Pavements and Fuel

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  • With buildings and infrastructure, it pays to take a life

    With buildings and infrastructure, it pays to take a life

    Mar 30, 2018 For pavements, CSHub LCA work considers all life-cycle phases from initial construction to demolition, including operation, maintenance, and end-of-life phases, and factors such as traffic delay, lighting demand, and future maintenance, while LCCA research considers life cycle, context, and future, and also incorporates risk

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  • Life Cycle Analysis of Recycled Aggregate in Concrete

    Life Cycle Analysis of Recycled Aggregate in Concrete

    IJSTE - International Journal of Science Technology & Engineering | Volume 5 | Issue 2 | August 2018 ISSN (online): 2349-784X Life Cycle Analysis of Recycled Aggregate in Concrete Production Pallavi Shelke S. S. Deshmukha PG Student Professor Department of Civil Engineering Department of Civil Engineering KJCOE, Pune, India KJCOE, Pune, India Abstract Recycling of concrete waste as an

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  • How to calculate the life cycle cost of equipment. | MC

    How to calculate the life cycle cost of equipment. | MC

    Jul 28, 2019 Cost of parts Labour Consumables, and Downtime. 2. Reactive Maintenance Life Cycle Costs. When you react to a breakdown, in addition to the cost of lost productivity (particularly if it is a critical piece of equipment), you also have to account for hard costs

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