Assessment of Early Hydration and Microstructures of Portland Cement Incorporating Calcined Attapulgite

Jiang, Jinping; Li, Maosen; Yan, Jiahao; Zhou, Mengya; Duan, Ping; Zhang, Zuhua; Liu, Junhan

doi:10.1007/s13369-023-07614-1

Cited by 7 publications

(3 citation statements)

References 46 publications

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“…These results indicate that palygorskite content and curing age significantly impact internal pore structure and promote the early reaction of hydration. Palygorskite can adsorb a large amount of water, fill the pores of the cementitious material, and solidify heavy metal ions mainly in the form of adsorption [32,33]. The generation of hydration products reduces the pores in the cementitious material, but the previously filled pores are subject to more harmful pores (> 200 nm) due to water loss.…”

Section: Porositymentioning

confidence: 99%

Study on the Effect of Palygorskite on the Properties of Copper-Nickel Smelting Slag-Based Cementitious Materials

Zhu,

Wang,

et al. 2024

Preprint

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In order to study the feasibility of copper-nickel smelting slag（CNSS） and palygorskite for large-scale consumption and utilization in the field of mine filling, gellable composite materials were prepared from copper-nickel smelting slag ,cement and palygorskite. The effects of palygorskite addition and curing time on the mechanical properties and microstructure of copper-nickel smelting slag-based cementitious materials were studied in detail. The results showed that the addition of palygorskite had a positive effect on the curing of the cemented filler of the non-ferrous smelting slag by promoting the early hydration reaction. palygorskite also affected the mechanical properties of the cementitious materials with different maintenance times and the ability to cure heavy metals. The strength of gellable composite materials reaches 23.05MPa when 1% palygorskite, 50% of copper-nickel smelting slag and 48% cement were used, which meet the standards requirements of filling materials for mine goaf. The addition of 1% palygorskite can improve the ability of cementitious materials to solidify heavy metals to realize the economic utilization of solid waste in mining areas.

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Section: Porositymentioning

confidence: 99%

Study on the Effect of Palygorskite on the Properties of Copper-Nickel Smelting Slag-Based Cementitious Materials

Zhu,

Wang,

et al. 2024

Preprint

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“…and complex operating environment, rolling bearings often lead to serious safety accidents due to sudden failures, which in turn lead to huge economic losses. Therefore, effective fault diagnosis technology is essential to ensure the safe operation of rotating machinery and equipment [1][2][3]. With the development of artificial intelligence, many new methods have been introduced in the field of fault diagnosis [4].…”

Section: Introductionmentioning

confidence: 99%

Intelligent fault diagnosis for variable working conditions of rotor-bearing system based on vibration image and domain adaptation

Zhu

Liu²,

Peng

et al. 2023

Meas. Sci. Technol.

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In recent years, intelligent condition monitoring and diagnosis based on deep learning have made great progress. However, traditional diagnostic methods mostly perform vibration analysis based on accelerometer signals, ignoring the influence of sensors on the mass load of the measured object. On the other hand, conventional transfer learning methods are mostly based on global distribution alignment to achieve intelligent diagnosis under variable working conditions. In this paper, a deep global subdomain adaptation network (DGSAN) is proposed to solve the intelligent diagnosis problem under variable working conditions based on vibration image and transfer learning. First, visual measurement is introduced in vibration extraction. Based on the phase vibration extraction method, the vibration feature information is obtained from the visual vibration image to construct the vibration dataset. Then, the proposed DGSAN establishes a multi-layer domain adaptive network to minimize the difference in feature distribution and realize fine-grained feature distribution alignment of fault data under variable working conditions. Comparative experiments are carried out on the vibration image datasets of rotor-bearing systems, and the results show that the proposed method achieves high-precision transfer intelligent diagnosis.

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“…High reactive attapulgite is obtained by thermally activating attapulgite clay with a high alumino-silicate content. This process allows for the production of attapulgite with desired characteristics, such as high reactivity and/or proper fineness, as it is not a waste material or by-product and can be produced in a controlled manner [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Cold-Bonded Lightweight Synthetic Aggregate Involving High Reactive Attapulgite at Different Curing Conditions

Abbas

2023

ETJ

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SLA was fabricated using HRA and PC via a cold-bonded process • Different percentage levels of HRA and PC were used • SLA with a density of 793 kg/m 3 can be producedThis study aimed to develop an eco-friendly, lightweight, and synthetic aggregate (SLA) based on clay suitable for use in structural lightweight concrete. The researchers utilized the cold-bonded pelletization process to agglomerate pozzolanic materials, specifically attapulgite extracted from a quarry, and crushed into a fine filler. The appropriate calcination temperature for manufacturing this clay as a pozzolanic material is 750℃. A total of 22 mixes were created using a combination of high reactive attapulgite (HRA) and cement (PC), with the attapulgite replacement rate varying from 100-50% by a 10% decrement. Different types of curing methods, including oven-dry, oven-water, room-water, and room-room, were applied. The aggregate properties were evaluated to determine density, specific gravity, water absorption, aggregate impact value, crushing strength, and compressive strength. The results revealed that it could produce lightweight synthetic aggregate from clay-based materials with a bulk density of 793 kg/m 3 with suitable physical and mechanical properties. As the percentage of cement in the mixture increased, the specific gravity and density were increased to 18.12% and 36.61%, whereas impact and crushing values of aggregate improved by 81.83%. This, in turn, leads to a significant boost in compressive strength up to 100.94%. Furthermore, there is a noticeable decrease in absorption. Moreover, the aggregate held under oven water positively impacts the strength development of cement-based composites.

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Assessment of Early Hydration and Microstructures of Portland Cement Incorporating Calcined Attapulgite

Cited by 7 publications

References 46 publications

Study on the Effect of Palygorskite on the Properties of Copper-Nickel Smelting Slag-Based Cementitious Materials

Study on the Effect of Palygorskite on the Properties of Copper-Nickel Smelting Slag-Based Cementitious Materials

Intelligent fault diagnosis for variable working conditions of rotor-bearing system based on vibration image and domain adaptation

Cold-Bonded Lightweight Synthetic Aggregate Involving High Reactive Attapulgite at Different Curing Conditions

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