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تشنغتشو ، الصين
program for the production of concrete sleeper in in
en/program for the production of concrete sleeper in
Contribute to dinglei2022/en development by creating an account on .The following steps were taken to investigate the application of GGBFS and steel fibers in prestressed concrete sleepers: 1) selecting appropriate mix Mix design of concrete for prestressed concrete sleepers
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Decarbonization of the concrete railway sleeper production:
Abstract. This study presents four new concrete railway sleeper models' environmental emission and service life investigations. Both of these two factors are This paper will evaluate the technical characteristics of concrete sleeper production methods including the long line system method, pre-tensioned long-mould flow method, pre-tensioned short-mould flow Sustainability Free Full-Text Comparative
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Green approach on ternary blended pre stressed cement concrete
The findings of current experimental studies indicate, the PSC sleeper manufactured with ternary blended concrete (TBC) of different percentage level of Fatigue loads and material properties are the most important factors to analyze the fatigue life of concrete sleeper. The fatigue life of concrete sleeper can be Diagnostics and management methods for concrete sleepers
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CONCRETE SLEEPER TECHNOLOGY Semantic Scholar
The four main production processes for prestressed concrete sleepers are described: late demoulding in the carousel system, long line system, instant demoulding with post CONCRETE SLEEPER TECHNOLOGY. Prestressed concrete sleepers are being widely used in many countries. The four main production processes for prestressed concrete CONCRETE SLEEPER TECHNOLOGY Transport Research
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Concrete Plant Precast Technology
News. 02.11.2023 Anchor fixings in concrete: Model for realistic calculation of elastic anchor plates 30.10.2023 Big 5 Global: Dubai World Trade Centre from 4 7 December 2023 25.10.2023 33rd international Conference: "Rheology of Building Materials" on February 28-29, 2024 23.10.2023 Official opening ceremonies at the new Peikko The concrete sleeper is first cast for the preload and then must be bonded in order to achieve the compressive strength. This is called concrete production with subsequent bonding. Subsequently, the stressing steel is threaded in and prestressed against the concrete. The compressive strength after the completion of the sleeper should be 60 Concrete sleepers / ties Sleepers / Ties :: Trackopedia
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Crack Propagation Assessment of Time-Dependent Concrete
The concrete sleeper meets the technical requirements of EN 13230 [35,36,37]. The dimension of the sleeper is approximately 2600 mm × 320 mm × 260 mm including 10 prestressing tendons with 7 mm diameters. The material properties are shown in Table 2 and the geometric details of concrete sleeper are illustrated in Figure 2.This paper introduces the design requirements for C60 grade high performance concrete material for prestressed high-speed railway sleepers, designed and produced by a patented end plate bearing prestressing system. This paper also highlights the particular early strength and curing requirements for the selected production method.High performance concrete requirements for prefabricated high
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Green approach on ternary blended pre stressed cement concrete
Because cement manufacture consumes a significant amount of energy and generates a significant quantity of carbon dioxide (CO 2) (about 4–7% of total global green house effect), there are rising worries regarding the environmental effects of reinforced and prestressed concrete sleeper production (Shojaei et al., 2015).Prestressed concrete railway sleeper is the most commonly used type of sleeper around world with its economic cost, long service life, and sound structural performance. However, prestressed concrete sleepers can still be damaged due to flexural, shear, or bond stresses. In long-term service, fatigue load heavily influences progressive Fatigue life modelling of railway prestressed concrete sleepers
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Suitability of recycled materials as a composite sleeper: A
Due to the increase in the world population, the world plastic production rate increased to 360 million metric tons in 2018, and more than half of that materials are just for single-use purposes. Every year, we dump more than 8 million plastic materials in the ocean [6]. Compared with a ballasted track with a concrete sleeper, the rubberThe primary material in prestressed concrete sleepers [PCS] is concrete, and for samples measuring 150 mm × 150 mm in cube size, the minimum 28-day strength should be 60 MPa for both sleepers [9], [10].Longitudinal prestressed tendons are used of size 18 No. of 9 mm diameter and 10 No. of 7 mm diameter for Indian and CT III PCS, Performance studies on two types of prestressed concrete
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Structural behaviour of prestressed concrete sleepers
cement amount and the effective water-cement ratio were kept constant in the HPC and the HPRACs production (considering effective water as that amount water reacting with the binder or not stored in the aggregates [53]). The admixture were used in 1% of the cement weight in order to maintain dry consistencies, 0-20 mm inCurrently, in concrete technology, the main tasks are to increase the strength and durability of concrete; to reduce labor and energy costs associated with the manufacture of concrete and reinforced concrete structures [9-15]. To solve these problems, various technologies are used, associated with the introductionHigh-strength concrete technology for manufacturing
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(PDF) Analysis of Fault Conditions in the Production of
Among other studies [14], the objective was to determine the concrete causes of sleeper defects in the production process and propose improvement actions. The authors of the study [15] used a2.1 Materials 2.1.1 Cement and admixture. In the production of the HPC, a rapid-hardening Portland cement (CEM I 52.5R) with low alkali content was used. Their specific surface and density were 495 m 2 /kg and 3150 kg/m 3, respectively.According to the regulations laid down in the Spanish railway specifications [], the Portland cement Structural behaviour of prestressed concrete sleepers
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(PDF) Experimental and Numerical Studies of
These sleeper production processes and their classifications are illustrated in Figure 2. wooden sleepers in North America due to the abundance of timber resources [14], concrete has become theLCR concrete sleeper production and modal test system preparation As is seen in Table 1,within the scope of this study, a large number of sleeper combinations were produced at the TCDD (Turkish State Railways) Sivas Concrete Sleeper Factory, using B70 type prestressed sleeper moulds and with a post-tensioned prestressing process.Comparison of prestressed concrete railway sleepers and
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Structural performances of an eco-friendly prestressed concrete sleeper
Abstract. This study focuses on investigating structural performances of a newly developed eco-friendly prestressed concrete sleeper for railway tracks in South Korea. An eco-friendly concrete has been developed by authors at the Korea Railroad Research Institute (KRRI) with the aims of reducing carbon dioxide (CO 2) emissions and finding aThe prestressed concrete monoblock sleeper is usually installed on a ballasted track (Fig. 1), which is commonly divided into superstructure and substructure.The sleeper, rails, and fastening system make up the superstructure, while the ballast, sub-ballast, and subgrade represent the substructure [17].The main materials of prestressed A review of failures of railway monoblock prestressed concrete
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Production process & controls on PSC sleepers Academia.edu
PRODUCTION CYCLE OF SLEEPER Moulds being cleaned Mould end plates are fixed Oiling & Greasing of moulds HTS Wires being cut to length of Wires drawn through bench the moulds Wedges & Barrels and inserts are fixed Tensioning of drawn Wires Completed sleepers Weigh Batching & Concrete Pouring moved to stack yard Concrete Mixing into Prestressed concrete sleepers are an important track component that is widely used in railway ballast track. Prestressed concrete sleepers have high strength, strong stability, and good durability; thus, their operation and use in railways are beneficial. However, in different countries and regions, certain damage to sleepers typically The Typical Damage Form and Mechanism of a Railway Prestressed Concrete
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Comparative Investigations into Environment-Friendly Production
Prestressed concrete sleeper is a safety-critical track component widely used in ballasted railway tracks. The performance, endurance and quality of prestressed concrete sleepers can detrimentally affect the serviceability and durability of a railway track. An optimal production method is an important criterion underpinning quality and durability As with all sleeper material types, concrete sleepers experience damage and are removed from service as a result of inspection. Visual inspection remains the most common assessment method [10] even though the ballast obscures the visual assessment of five of the six sides of a sleeper. Further, many sleepers identified for removal through Smart railway sleepers a review of recent ScienceDirect
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