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Abstract. This paper aims to evaluate the forms of concrete waste generation in concrete batching plants (CBP) in the metropolitan region of Belo Horizonte, Brazil, …
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DOI: 10.1016/J.CONBUILDMAT.2016.02.044 Corpus ID: 138100079; Utilization of sludge from ready-mixed concrete plants as a substitute for limestone fillers @article{Audo2016UtilizationOS, title={Utilization of sludge from ready-mixed concrete plants as a substitute for limestone fillers}, author={Mariane Audo and P-Y. Mahieux …
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A bench-scale plant for waste concrete sludge recycling was designed, constructed, and operated. Real concrete sludge generated from a pile and pole …
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Fresh Concrete slurry waste on-site recycling as Supplementary Cementing Material. • Thorough characterization of Concrete slurry waste. • 10% …
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Nevertheless, the complete recycling of sludge water has been considered in concrete mixing plants because of the great benefit in terms of disposal cost reduction and environmental conservation (Chini and Muszynski, 2001, Su et al., 2002, Paolini and Khurana, 1998).
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To fabricate a concrete mixture (concrete partition wall block), a fine recycled concrete aggregate (FRCA) was obtained from a construction waste recycling plant in Hong Kong. The cement used was an ASTM Type I Portland cement with a specific gravity of 3.15 g/cm 3 and a specific surface area of 3960 cm 2 /g.
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A bench-scale plant for waste concrete sludge recycling was designed, constructed, and operated. Real concrete sludge generated from a pile and pole production plant and groundwater were used for ...
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Nevertheless, the complete recycling of sludge water has been considered in concrete mixing plants because of the great benefit in terms of disposal cost reduction and environmental conservation (Chini and Muszynski, 2001, Su et al., 2002, Paolini and Khurana, 1998).
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Generally, DWTS can be divided into natural sludge, coagulant sludge, groundwater or softened sludge, and manganese-containing sludge, among which coagulant sludge is the main waste of water treatment plants (Babatunde and Zhao, 2007).The raw water (water source from reservoirs, lakes and rivers, etc.) (Zhang et al., 2021) is coagulated, …
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Liu Y et al. [19] used sludge as a substitute for sand and gravel in the production of concrete and found that due to its high water absorption and high organic content, sludge reduces the durability and mechanical properties of concrete. Using sludge from wastewater treatment plants calcined and ground to replace some cement …
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Several concrete sludge recycling methods have been proposed, including reusing sludge as a raw material for cement production ... Bench-scale operation of a concrete sludge recycling plant. Ind. Eng. Chem. Res., 51 (2012), pp. 6099-6104, 10.1021/ie300620u. View in Scopus Google Scholar.
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Recycling and reuse of this sludge, especially, as fine sand in preparing mortar, concrete mix and other civil engineering products would pave the way for constructive utilization with safe and ...
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The concrete slurry water used in experiments was separated into supernatant water and concrete slurry waste to obtain equal sludge solids content. The concrete slurry waste was dried at 105 °C until it reached a constant weight. Then, the dried concrete slurry waste was pulverized to control the particle size to 75 µm or below …
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The potential use of equipment for fresh concrete recycling, which allows the recovery of aggregates and water, could be attractive because previous studies have demonstrated that there are economic benefits in addition to environmental benefits. ... (2016) that had applied sludge from ready-mixed concrete plants as a substitute for …
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In order to industrialize the recycling of sludge into concrete in ready-mixed concrete plants, sludge must be used at their wet state. Consequently, mortars were also made with wet sludge in order to highlight any influence of the drying process on rheological and mechanical resistance. Firstly, wet sludge impacted significantly the …
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1.3.3 Dewatering. The final step in conventional sludge treatment is the dewatering process. Dewatering functions to separate the water with solid substances, and this process is capable of reducing the volume of sludge, making the sludge easy to manage and to produce good quality supernatant from the treatment.
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Pilot-Scale Operation of a Concrete Sludge Recycling Plant and Simultaneous Production of Calcium Carbonate. January 2017. Chemical Engineering …
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Design/methodology/approach – Samples of waste water from several points of a water recycling process from a ready‐mixed concrete plant were examined for their chemical properties (Cl ‐, SO 4 2‐, alkalies, total solids, pH) and compared with the specifications applied for concrete mixing water.Also samples of dry sludge powder …
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Oldcastle Precast Inc. (DBA Rotondo Precast) in Telford, Pa., utilizes two 1,000-gallon tanks and an automated pH monitoring and adjustment system for treating process water. Bob Dando, Rotondo's safety director, indicated that the plant recycles as much of the treated water as possible when cleaning production equipment with a …
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USE OF SLUDGE FROM WATER AND WASTEWATER TREATMENT PLANTS IN THE PRODUCTION OF CONCRETE: AN EFFECTIVE END-OF-WASTE ALTERNATIVE. ROCCARO P.1, FRANCO A.1, CONTRAFATTO L.1 and VAGLIASINDI F.G.A.1. 1 Department of Civil Engineering and Architecture, University of Catania, Viale A. Doria 6, …
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Besides the increasing disposal cost, sludge water, a wastewater washout from ready-mixed concrete plant, has caused environmental impact problems. This paper investigates the utilization and recycling of sludge water as mixing water for concrete production. The basic properties of sludge water were obtained according to ASTM …
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This paper gives a comprehensive review of the characteristics and applicability of fresh concrete waste in phase of slurry wastewater, fresh paste, and recycled solids. The effects of fresh concrete waste in the three phases on workability, strength, and durability such as permeability, water absorption, shrinkage, and acid …
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The M30 grade of concrete built in conformity with IS 10262-2019 [12] had a mixed percentage of 1:1.41:3 and a w/c ratio of 0.44 [13].The replacement percentage for cement by TES ranged from 5 to 25%. (Fig. 2)The corresponding specimens' name used in the present investigation is given in Table 2.To investigate the mechanical property, …
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Wastewater treatment - Sludge, Disposal, Treatment: The residue that accumulates in sewage treatment plants is called sludge (or biosolids). Sewage sludge is the solid, semisolid, or slurry residual material that is produced as a by-product of wastewater treatment processes. This residue is commonly classified as primary and secondary …
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Concrete mixed with sludge water containing residual cement tend to give a shorter setting time and lower flowability [4]. Con-cerning the above situation, the effective use of the recy-cling sludge water in concrete production would be of. 442. B. Chatveera et al. / Cement & Concrete Composites 28 (2006) 441–450.
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Concrete slurry waste (CSW) is a mixture of fine aggregates, cement hydration products and residual cement particles obtained from the sedimentation pits during the production of concrete. In the present study, CSW with different grinding durations were evaluated; the properties of the CSW and the CSW-cement composition …
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Concrete slurry waste (CSW) is generated from ready-mixed concrete plants during concrete production and is classified as a corrosive hazardous material. If …
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Disposal of water treatment sludge (WTS) has become an important issue of global environmental concern due to problems and costs. This study explored the feasibility of cold-bond methodology to produce an eco-friendly core–shell lightweight aggregate (LWA) from WTS, expanded perlite (EP), and cement. The effect of cement …
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A bench-scale plant for waste concrete sludge recycling was designed, constructed, and operated. Real concrete sludge generated from a pile and pole production plant and groundwater were used for the … Expand. 47. Save. Effect of sludge water from ready-mixed concrete plant on properties and durability of concrete.
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Extra concrete and waste from concrete mixer truck, concrete manufacturing site and drum of concrete mixers in concrete batching plants were …
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