No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
The chemical compositions of Portland cement (PC) and bauxite residue (BR) are given in Table . 1. As PC, a CEM I containing 4.9% limestone was used as delivered from Norcem, Brevik,
Request PDF | On Apr 1, 2013, Y. Pontikes and others published Bauxite Residue in Cement and Cementitious Applications: Current Status and a Possible Way Forward | Find, read and cite all the ...
In this study, 10 mixes were prepared and tested to investigate the simultaneous application of RM (10%, 15%, and 20%) and silica fume (SF) (5% and 7.5%) as cement …
Work on the use of bauxite residue in cement has been pursued for over 80 years with many successful technical studies and several large‐scale initiatives which has led to industrial …
Opportunities for using bauxite residue in Portland cement clinker production 4 Contents 1. Background 5 2. Cement – basic background 5 3. Overview of the use of bauxite residue in cement 8 3.1 Key beneficial characteristics of bauxite residue 9 4.
Red Mud (RM) is an alkaline solid waste byproduct formed when alumina is extracted from bauxite ore, mainly by Bayer's process. Around 35–40% of the ore is disposed off as alkaline RM slurry [1], [2].RM disposal is environmentally detrimental to the surrounding ground, water, and air [3].Its high pH of around 13 destroys vegetation and organic matter in …
One cementitious material is geopolymer concrete (GPC), which is produced by activating industrial by-products with alkaline activators. This study evaluates the mechanical and environmental properties of geopolymer concrete incorporating bauxite residue (BR) with phosphogypsum (PG) and ground granulated blast slag (GGBS). The compressive strength of …
Bauxite residues from alumina production are available at a multi‐million tonnes scale worldwide. So far, attempts have been made to find alternative re‐use applications for bauxite residues, for instance in cement / pig iron production. However, bauxite residues also constitute an untapped secondary source of CRMs.
Bauxite residue popularly known as red mud due to its red in color is generated during the production of alumina either by Bayer process or by sintering process and or by …
This paper examines the corrosion of rebar embedded in concrete when cement is partially replaced with toxic bauxite residues, known as red mud (RM). The concrete mixtures were made with ordinary Portland cement (OPC), and OPC replaced with 5% of RM (95% OPC + 5% RM). In order to evaluate the rebar corrosion in aforesaid concrete mixes, 5% …
Concrete, a synthetic rock composed of cement, sand, gravel and water, is the fundamental building block of the urbanizing world, and by far the most widely used man-made material in the ...
Bauxite is used in chemical industry, refractory brocks, abrasive, cement, steel, and petroleum. Lateritic bauxite is often used as a building material. The calcined bauxite, produced by sintering of high-alumina in rotary, round or shaft kilns at high temperature, is used as an anti-skid road aggregate which is used in selected areas to ...
In emerging countries, Portland cement plays a significant role in dwelling construction and infrastructure expansion, where concrete is the most widely used material. The production of concrete is responsible for about 5 to 8% of the world's CO 2 emissions, and cement production is responsible for 95% of this total [1].
Bauxite residue (BR) is a by-product of Bayer process, which is applied for alumina production. Due to its inherent alkalinity and sodicity, the use of BR is globally limited to 2–3% of the 150 ...
When making concrete by weigh batching, experimental studies are done to determine the strength and durability of concrete in which cement is replaced with red mud (bauxite residue) in percentages ...
Ultra-high performance concrete (UHPC) has remarkable performance in mechanical properties, ductility, and durability. However, it is characterized by very high autogenous shrinkage (600–1000 μm/m) due to its large amount of binder (800–1000 kg/m 3) and very low water-to-binder ratio (w/b less than 0.25) [1, 2].Under restrained conditions and …
Alternate sources such as the use of industrial waste as replacement of natural sand in concrete are gaining popularity as a sustainable construction material. The aim of this …
DOI: 10.1016/J.RNREC.2013.01.005 Corpus ID: 109401618; Bauxite residue in cement and cementitious applications: Current status and a possible way forward @article{Pontikes2013BauxiteRI, title={Bauxite residue in cement and cementitious applications: Current status and a possible way forward}, author={Yiannis Pontikes and George N. …
Using bauxite residues in concrete has proven to be an environmentally friendly and sustainable approach. In this study, cement mass was partially replaced with bauxite residues (at 5, 10, 15, and 20%), with variations in residue diameter (300 µm, 600 µm, and 2 mm) and in liquid form. The concrete's workability, air content, density ...
The results show that the concrete strength is not significantly affected when natural sand is replaced completely with red sand. ... Nikraz, H, Jamieson, E and Cooling, D, 2006. Sustainable use of bauxite residue sand (red sand) in concrete, in Proceedings Green Processing 2006, pp 105-112 (The Australasian Institute of Mining and Metallurgy ...
Liu and Wei [13] and Liu and Wei [29] discovered that calcined bauxite-aggregate blended in an air-dry condition could absorb water during mixing and discharge it into the concrete mixture after ...
In recent years, some researches are focused on the reutilization of industrial waste residues (e.g., waste glass, concrete waste) in concrete or mortar to improve some properties (Guo et al., 2015, Zhao et al., 2013, Oliveira et al., 2015, Kou et al., 2012, Torres-Carrasco and Puertas, 2015).Bauxite contains large amounts of aluminium hydroxides and is …
1. Introduction. Bauxite Residue (BR) (also known as red mud) is the digestion residue of alumina production when using the Bayer process [1, 2].The levels of global production are estimated to be more than 150 Mt. per year [3].This poses challenges in terms of safe disposal and the related costs as well as the long-term liability.
It improves the cement properties and reacts with water to form cementitious compounds. Slag improves sulfate resistance as well as the overall performance of the cement. 9. Bauxite. Bauxite, also known as red mud, is the by-product of alumina processing. Bauxite contains a high aluminum content (30–60%). It is also a sedimentary rock.
Abstract Cement, the most used building material amounts to an annual world production of 3.5 Gt. Sulfobelite cements, SB, require lower kiln temperature and emit less CO2, compared to Ordinary Portland cement, OPC. The main difference of SB from OPC is the reduction of alite (CaO)3SiO2, the increase of belite (CaO)2SiO2 and the formation of …
In addition, red mud can also be widely used in the cement industry, ... Effect of red mud (bauxite residue) as cement replacement on the properties of self-compacting concrete incorporating various fillers. J. Cleaner Prod., 240 (2019), p. 118213, 10.1016/j.jclepro.2019.118213.
Furthermore, all the bauxite mining waste concrete mixes also showed tensile splitting strength values higher than the control mix. This result is consistent with the results obtained by Divakar et al. [24] and Sakthivel et al. [5]. The increase in tensile splitting strength after replacement of sand with varying proportion of bauxite mining ...
Bauxite residue is used to make cement in factories in China, Ukraine, India, Russia, Georgia, Moldova, and Greece. ii. Over 260,000 tonnes of red mud from the Nikolayev alumina refinery in Ukraine are used annually in the cement industries of Ukraine, Russia, Georgia, Moldova, and Belarus.
RM, a residue of bauxite, obtained at the time of aluminum production can be used for various civil engineering purposes without compromising the engineering characteristics. ... On the other hand, the using of conventional civil engineering materials (cement) is the source of 10% CO 2 emission as well as reduction of natural resources (soil ...
The study revealed that bauxite residues can effectively replace up to 20% of cement in the concrete mix. Although their use slightly affects the fresh properties of concrete, it …
