Utilization of red mud as an alternative mineral filler in asphalt mastics to replace natural limestone powder

Zhang, Jizhe; Li, Peizhao; Liang, Ming; Jiang, Hongguang; Yao, Zhenqiang; Zhang, Xiaomeng; Yu, Sen

doi:10.1016/j.conbuildmat.2019.117821

Cited by 58 publications

(21 citation statements)

References 29 publications

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“…e reason for the above phenomenon is that, with the increase of the HL content, the solid composition in the binder increases, which increases the viscosity of the asphalt mortars, reduces the flow deformation at high temperature, and enhances the antirutting ability. is result is in accordance with the other references, which examine the influence of various types of mineral fillers on the rheological properties of the asphalt [32,33].…”

Section: Dsr-ts Test Resultssupporting

confidence: 92%

“…(2) MSCR test: MSCR test was conducted to test the elastic recovery behavior and stress-dependent behavior of different asphalt mortars at 76°C under 0.1 kPa and 3.2 kPa creep stress, respectively, in accordance with AASHTO T350-14 [32]. During the test, the shear stress of 0.1 kPa was used to load for 1 s duration creep followed with a stress recovery for 9 s duration.…”

Section: Dynamic Shear Rheometer For Temperature Scanning (Dsr-ts) and Multiple Stress Creep Recovery (Mscr) Testsmentioning

confidence: 99%

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Effects of Hydrated Lime on High‐Temperature Rheological Properties of High‐Viscosity Modified Asphalt

Zhou

Sun

Chi

et al. 2021

Advances in Materials Science and Engineering

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High-viscosity modified asphalt (HVA) is widely used as the binder for permeable asphalt pavement, and hydrated lime (HL) attracts a strong technical interest as an effective moisture additive in asphalt for a long time. However, the application of HL in HVA has been rarely studied. The present study evaluates the influence of HL on the high-temperature rheological properties of HVA and selects the optimum HL content and fineness. The asphalt mortars of HVA and HL of different contents and fineness were prepared. Temperature scanning (DSR-TS), multiple stress creep recovery (MSCR) by using a dynamic shear rheometer, and scanning electron microscope (SEM) tests were carried out to evaluate the high-temperature rheological properties and microstructure morphology characteristics of the asphalt mortars. Based on the DSR-TS and MSCR tests, the results showed that high-temperature performance together with the ability to deformation resistance of HVA was improved apparently with the increase of the HL content. When the HL content is above 1.2, the stress sensitivity of HVA is lower. The SEM results clearly showed that the uniformity of asphalt mortars could be effectively guaranteed when the HL content was 1.2 and the fineness was 800 mesh. The HL fineness has little effect on the high-temperature performance of HVA. In summary, taking into account the high-temperature performance and microstructure of HVA with HL, the optimum HL content and fineness could be finally determined.

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Section: Dsr-ts Test Resultssupporting

confidence: 92%

Section: Dynamic Shear Rheometer For Temperature Scanning (Dsr-ts) and Multiple Stress Creep Recovery (Mscr) Testsmentioning

confidence: 99%

Effects of Hydrated Lime on High‐Temperature Rheological Properties of High‐Viscosity Modified Asphalt

Zhou

Sun

Chi

et al. 2021

Advances in Materials Science and Engineering

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“…Although a lot of work and research has been done on the recovery and utilization of the valuable components of RM through hydrometallurgical and pyrometallurgical methods in recent years, the unique physical and chemical properties of RM prevent large-scale utilization of RM based on these methods. At present, the treatment and utilization of RM are concentrated on the manufacture of adsorbents, ceramics, bricks, high-performance concrete admixtures, and base materials for roads [ 11 , 12 , 13 , 14 , 15 ]. Despite extensive previous studies on how to utilize RM comprehensively on a large-scale, most of the processes for the utilization of RM are limited by high cost and high energy consumption; thus, studies are still at the laboratory stage and no real engineering application has been realized [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Physico-Chemical Performance Optimization of Sintering-Free Lightweight Aggregates with High Proportions of Red Mud

et al. 2021

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Sintering-free lightweight aggregates were prepared with high proportions of red mud and a binder material derived from whole solid wastes through rolling granulation at room temperature. The preparation process was optimized by changing the material matching and size parameters of the SFLAs. The physico-chemical performance, including the density, mechanical strength, water absorption, hydration products, heavy metal leaching, and microstructure were evaluated by jointly employing X-ray Fluorescence, X-ray Diffraction, and Inductively Coupled Plasma Optical Emission Spectrometry, Shadow Electron Microscope, etc. The results indicated that the red mud and waste-based binders were highly compatible in the granulation process, with up to 80% red mud being successfully added. The sintering-free lightweight aggregates products at the binder content of 30% and the size coverage of 10–16 mm exhibited a bulk density of 900–1000 kg·m−3, a 28 d cylinder compressive strength of 9.2–11.3 MPa, and water absorption of less than 10%. Owing to the formation of important hydration products, ettringite, the heavy metal leaching of the sintering-free lightweight aggregates was also proven to be environmentally acceptable. This work provides a promising pathway to prepare low-cost, high-strength, and green lightweight aggregates through the large-scale utilization of solid waste red mud.

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“…Therefore, more comprehensive utilizations of red mud have been studied by researchers. Zhang et al (2020) used red mud-derived filler aggregate to replace the limestone powder commonly used in asphalt mastics, and used hydrated lime and white mud to improve red-mud-modified asphalt mastic. When mixed with hydrated lime and white mud, both materials can improve the low temperature crack resistance of red mud asphalt mastic.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Composition of Red Mud-Fly Ash-Based Geopolymers Incorporating Carbide Slag

et al. 2020

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In order to find the possibility of recycling an industry waste solid red mud from earth, a kind of geopolymer material system based on red mud-fly ash-carbide slag has been developed entirely from waste. The microstructure and composition of the geopolymer material system at the age of 28 days was tested by the scanning electron microscope (SEM), back scattered electron (BSE), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and thermogravimetric-differential scanning calorimetry (DSC-TG). It was showed that the compressive strength of the geopolymer sample was 15.1 MPa when the liquid solid ratio (L/S) was 0.7, sand-binder ratio was 3:1, alkaline activator used wet-based carbide slag, and the fly ash, red mud and carbide slag were prepared as the proportion of 4:3:3. Through scanning electron microscope, back scattered electron, energy dispersive spectroscopy, X-ray diffraction, and thermogravimetric-differential scanning calorimetry results, the spherical beads in fly ash were dissolved in the alkaline environment to form silicon and aluminum monomers and polymerized to synthesize C-S-H and C-A-S-H gels. Wet-based carbide slag played the role of calcium component support in C-A-S-H, C-S-H gels and alkaline activator.

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Utilization of red mud as an alternative mineral filler in asphalt mastics to replace natural limestone powder

Cited by 58 publications

References 29 publications

Effects of Hydrated Lime on High‐Temperature Rheological Properties of High‐Viscosity Modified Asphalt

Effects of Hydrated Lime on High‐Temperature Rheological Properties of High‐Viscosity Modified Asphalt

Preparation and Physico-Chemical Performance Optimization of Sintering-Free Lightweight Aggregates with High Proportions of Red Mud

Microstructure and Composition of Red Mud-Fly Ash-Based Geopolymers Incorporating Carbide Slag

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