Saving Energy in Ready Mixed Concrete Production
1.1 Ready Mixed Concrete Production. An overview of ready mixed concrete production is shown in Figure 1. According to a survey of. 47 facilities across the United States,2 most of the fuel was used in boilers (49%) for hot-water production and building heat. An overview of the energy breakdown is shown in Figure 2.
Life-cycle inventory analysis of concrete production: A critical review
LCA of concrete and its raw materials is still a limited research area despite the expanding number of studies in recent years. Environmental impacts from the life cycle of materials other than Portland cement, such as admixtures and water consumption, are rarely included in published LCIs of concrete production.
Comparison of energy consumption and carbon emissions …
Establishing and analogy with the energy consumption for crushing the raw material for clinker production from Worrel et al. (2001), the energy required for the release stage can be estimated to be at most between 2.3 and 10.5 kWh/t recycled cement.
Recycled cement production energy consumption …
Highlights. •. Wet, air and dry methods for recycled cement production are compared. •. There are marginal energy and emissions reduction with the wet method. •. Dry and air methods consume only 30%–40% of the energy for clinker production. •. …
Materials Proceedings | Free Full-Text | Recycling …
CRUSHING and SCREENING IN UNIT POWERED BY ELECTRICITY: Value: Comments: Energy consumption per t produced (KWh/t) 4.010-CO 2 …
LIFE-CYCLE ASSESSMENT AND EMISSION FACTOR …
1 The total consumption of cement in 2011 was 72,200,000 tons (USGS, 2013). It was assumed that 100 percent of ... (Collins 2002), resulting in a calculated concrete production of about 578 million tons. WARM Version 13 March, 2015 ... emissions from energy used to transport raw materials, and (3) non-energy GHG emissions resulting
ANALYSIS OF ENERGY CONSUMPTION OF CRUSHING …
materials energy consumption in the two-stage crushing process was reduced by 30%. Key words: rock crushing, jaw crusher, crushing efficiency, two stage crushing process 1. INTRODUCTION The main aim of processing rock raw materials is to prepare and process the rocks to a condition that meets the commercial requirements for quality …
Modeling of energy consumption factors for an …
28 Citations. 5 Altmetric. Metrics. Abstract. Cement production is one of the most energy-intensive manufacturing industries, and the milling circuit of cement plants …
Materials Proceedings | Free Full-Text | Recycling Concrete …
The production and consumption of concrete also generate waste. In the construction industry, 30% of the total solid waste produced is considered construction and demolition waste (CDW) [ 5 ]. The global demand for aggregates in the construction sector was estimated between 25.9 to 29.6 Bt in 2012 [ 6 ] and is predicted to reach 47.5 Bt in …
Synthesis of artificial aggregates and their impact on
This demand has created a shortage of raw materials for concrete production. Natural resources are being over-exploited, hence an increasing concern over long-term sustainability [ 1, 2 ]. It is well known that aggregates occupy a significant volume of concrete, and approximately two tons of aggregates are essential to manufacture one …
Limestone and Crushed Rock
Table 9-1. Limestone and Other Crushed Rock Production and Energy Consumed by Type a Units 1987 1992 1997 Limestone and Rock Production b Billion tons - 1.2 1.2 Energy Consumption Coal Thousand tons Withheld 78.5 43.0 Fuel oil c Million bbl. 3.6 3.4 4.0 Gas Billion Cubic Feet 1.7 3.2 5.4 Gasoline Million Gallons 14.2 15.5 14.7 Electricity
Analysis of material flow and consumption in cement …
The results show that approximately 2.48 t, 4.69 t, and 3.41 t of materials are required to produce a ton of the product in raw material preparation, clinker production, …
Incorporating coarse and fine recycled aggregates …
Concurrently, the environmental impacts of producing 1 m 3 of concrete were evaluated using a life cycle assessment (LCA) approach, (cradle-to-gate) covering …
(PDF) Recycled aggregates in concrete production: …
Incorporating recycled aggregate in the design and production of HPC could further promote concrete sustainability by reducing the amount of extracted non‐renewable minerals, reducing the ...
Raw-crushed wind-turbine blade: Waste characterization …
This energy consumption was approximately 0.50 kWh/t lower than the usual energy consumption in a quarry for crushed-aggregate production (Petit et al., 2018). This simple recycling treatment of wind-turbine blades would simply require the correct location of the crushing plants within the waste-management chain currently …
Technological Energy Efficiency Improvements in …
Abstract: The cement industry is highly energy-intensive, consuming approximately 7% of global industrial energy consumption each year. Improving …
Production of natural and recycled aggregates: the …
Achieving 30 and 36% reduction in annual energy consumption and CO2 emissions, respectively, by the third scenario compared to the first scenario indicates the destructive effect of the first ...
Life-cycle inventory analysis of concrete …
Concrete is one of the most widely used building materials with a global consumption rate approaching 25 gigatonnes per year. Consequentially, its environmental burden is significant in terms of ...
Energy and CO2 from high performance recycled aggregate production
We calculated, for different scenarios, fines generation, energy, and CO 2 emissions. The production of fines increases from 40% up to as much as 70%. Energy consumption has resulted up to 62 times higher than conventional recycling. CO 2 emissions range from 1.5 to 4.5 kgCO 2 /t, to around 200 kgCO 2 /t.
Industrial production of recycled cement: energy …
Comparing the recycled cement production with the clinker production, higher energy consumption (over 9000 MJ/t compared with roughly 4000 MJ/t for …
Concrete CO Fact Sheet
the raw materials and transportation of the raw materials to the cement plant emit relatively small amounts of CO2. • According to the Department of Energy, cement production accounts for 0.33% of energy consumption in the U.S. The current level is low compared with other industries, such as
Journal of Cleaner Production
The crushing-consumption energy and material-related carbon footprint were analyzed. Abstract. Lime mud (LM), a solid waste generated in the paper-making industry, was proposed to manufacture lightweight artificial aggregates (LAAs) via the crushing technique. ... especially natural aggregates for concrete production (Qian et …
Reducing energy consumption of a raw mill in cement …
The high energy consumption of cement in concrete highly ... The average electricity consumption of raw material mill dropped from 30.88 kWh/t in 2014 to 16.13 kWh/t in 2019, with a drop of more ...
Study on energy use and carbon emission from …
The demand for production of cements is ever increasing to meet the infrastructure development globally. The energy and emission factors available for cements in most of the life cycle assessment (LCA) databases may not exactly suit for all the geographical locations. The main challenge in Indian scenario is the absence of …
Production of natural and recycled aggregates: the
Generally, annual production of building materials and products leads to consuming more than 3 billion tons of raw materials in the world . The industrial sector is believed to be one of the major sectors polluting the environment to such a large extent that 30–70% of the global energy consumption and CO 2 emissions are related to the ...
Cement
There are four stages in the manufacture of portland cement: (1) crushing and grinding the raw materials, (2) blending the materials in the correct proportions, (3) burning the prepared mix in a kiln, and (4) grinding the burned product, known as " clinker," together with some 5 percent of gypsum (to control the time of set of the cement). The three …
Energy-Efficient Technologies in Cement Grinding
The energy consumption of the total grinding plant can be reduced by 20–30 % for cement clinker and 30–40 % for other raw materials. The overall grinding circuit efficiency and stability are improved. The maintenance cost of the ball mill is reduced as the lifetime of grinding media and partition grates is extended. 2.5.
A Study on Energy Consumption and Carbon Footprint of …
The entire production process is taken into consideration from the extraction of raw materials to the production plants including the phases of materials manufacturing . ... crushing, screening though to restoration and loading for delivery. ... kWh Total annual kg CO2e Average energy consumption, kWh/ton concrete Average kg CO2e/ton …
Energy consumption assessment in a cement production …
Total energy consumption (%) Raw material collection: 1: 5: 1.4: Raw material processing: 28: 2.8: Clinker burning: 99: 25: 91.6: Clinker grinding: 32: 3.2: ... A vertical shaft impactor crusher was installed as a pre-grinder before each raw material grinder and cement grinder. The application of vertical shaft impactor has proven to be …
(PDF) Comparison of the energy consumption in the production …
Comparison of the energy consumption in the production of natural and recycled concrete aggregate: A case study in Kerala, India December 2020 IOP Conference Series Materials Science and ...
