Fabrication and characterization of self-ignition coal gangue autoclaved aerated concrete

Cong, Xinyu; Lü, Shuang; Yao, Yan; Wang, Z.

doi:10.1016/j.matdes.2016.02.068

Cited by 95 publications

(28 citation statements)

References 14 publications

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“…The mix procedures of SCGAAC was applied as the method mentioned in a preceding study [20]. Slurry expansions (SE) was a measurement index reflecting workability of fresh AAC pastes and it was found that the SE had an influence on the density and pore structure of hardened AAC [20].…”

Section: Specimensmentioning

confidence: 99%

“…The SCGAAC samples were moulded in 100 mm 3 cube metal moulds. The fabrication process and the curing protocol referred to [20].…”

Section: Specimensmentioning

confidence: 99%

“…With the intention of consuming self-ignition coal gangue (SCG) in construction materials, AAC using self-ignition coal gangue (SCGAAC) as one of precursors was fabricated and studied [20]. Mechanical performance and failure mechanism of the SCGAAC significantly depended on its micro structure as well as formation of reaction products, especially on the generation of tobermorite.…”

Section: Introductionmentioning

confidence: 99%

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Study on Water Absorptivity and Frost Resistance Performance of Self-ignition Coal Gangue Autoclaved Aerated Concrete

Cong

Tan

Lü

et al. 2021

Preprint

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Self-ignition coal gangue (SCG) used as one of precursors to fabricate aerated autoclaved concrete (AAC). Aiming at studying water absorptivity and frost resistance performance of self-ignition coal gangue aerated autoclaved concrete (SCGAAC), three-period water absorbing tests and freezing-thawing tests were carried out and the corresponding results were recorded and analyzed. In order to modify the water absorptivity of SCGAAC, foam stabilizer was applied to adjust pore structure while calcium stearate was expected to change hydrophilic feature of CG. It was demonstrated that the compressive strength of SCGAAC containing foam stabilizer or calcium stearate declined at different levels, although the porosity became lower slightly. For water absorptivity, foam stabilizer failed to decrease the water content at any period and even increased water absorbing rates. Calcium stearate controlled water absorbing rate successfully but the ultimate water content hardly reduced. All of the SCGAAC samples exhibited intact appearance after 50 freezing-thawing cycles and showed excellent frost resistance performance. Three models were proposed to predict water absorptivity and frost resistance performance of SCGAAC and the corresponding prediction results matched test resulted well.

show abstract

Section: Specimensmentioning

confidence: 99%

“…The SCGAAC samples were moulded in 100 mm 3 cube metal moulds. The fabrication process and the curing protocol referred to [20].…”

Section: Specimensmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study on Water Absorptivity and Frost Resistance Performance of Self-ignition Coal Gangue Autoclaved Aerated Concrete

Cong

Tan

Lü

et al. 2021

Preprint

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“…At present, the major application fields of CG are brick making, concrete production, cement production, roadbed production, power generation, and metal recovery. [11][12][13][14][15][16][17][18][19] However, CG applied as filler into polymer matrix is also a potential means that has received less attention before.…”

Section: Introductionmentioning

confidence: 99%

Impact of titanate coupling agent on properties of high density polyethylene composite filled with coal gangue

Ding

Zhang

et al. 2020

Surface & Interface Analysis

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In this study, surface modification of coal gangue (CG) was performed with titanate coupling agent 201 (isopropyl tri(dioctylpyrophosphate) titanate), and the effects of surface modifier on mechanical properties and thermal stability of high‐density polyethylene filled with CG (HDPE/CG) and high‐density polyethylene filled with modified CG (HDPE/mCG) composites were investigated. The coupling agent was successfully grafted on CG surface through chemical reaction according to the analyses of Fourier transform infrared spectroscopy (FT‐IR) and X‐ray photoelectron spectroscopy (XPS), and the coupling agent can effectively enhance the hydrophobicity of surface that was verified by water contact angle beyond 90° of modified CG sample. With the introduction of coupling agent, some enhancements of tensile strength, flexural strength, and impact strength were observed in HDPE/mCG compared with HDPE/CG, due to the improved compatibility between mCG fillers and matrix. The increased storage modulus and decreased loss factor of HDPE/mCG composite further confirm the stronger interface adhesion after modification. Moreover, it is found that titanate coupling agent 201 can improve the thermal stability of HDPE/mCG composite to some extent.

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“…Update, various waste minerals such as incinerator ash, coal ash, slags, waste glass, phosphorus fertilizer, and oil shale ash have been used. Coal gangue as a waste mineral has been widely utilized to fabricate cement [13][14][15], ceramics [16][17][18], refractory brick [19], zeolite [20], lightweight aggregate [21], mullite [22], and so on. The coal gangue is extensively produced in coal production.…”

Section: Introductionmentioning

confidence: 99%

Glass-ceramics fabricated by efficiently utilizing coal gangue

Dang

2020

Journal of Asian Ceramic Societies

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Glass-ceramics with high strength and lightweight were developed by comprehensively utilizing coal gangue and clay. This work optimized the many processing parameters including the rate of using coal gangue, coal gangue to clay ratio, mineralizers, and process of forming and sintering. Using coal gangue of 75% and coal gangue to clay ratio of 3/1 made the mechanical properties optimal. The sintering temperature of 1370°C was found to be optimal because mullite and spinel become the main crystal phase and thereby realizing high strength, low water absorbance, and low density for the sintered glass-ceramics. The mechanical properties of the glass-ceramics were further enhanced by adding mineralizer (TiO 2 , ZnO, and MnO 2 /dolomite) with reasonable amounts. Moreover, the properties were enhanced by optimizing processing parameters. We developed an excellent approach to sinter glass-ceramics illustrated high strength, lightweight, and low water absorption by efficiently utilizing and managing waste minerals. The sintered glass-ceramics can be used as high-performance proppant materials, cooking ceramics, and building materials ARTICLE HISTORY

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Fabrication and characterization of self-ignition coal gangue autoclaved aerated concrete

Cited by 95 publications

References 14 publications

Study on Water Absorptivity and Frost Resistance Performance of Self-ignition Coal Gangue Autoclaved Aerated Concrete

Study on Water Absorptivity and Frost Resistance Performance of Self-ignition Coal Gangue Autoclaved Aerated Concrete

Impact of titanate coupling agent on properties of high density polyethylene composite filled with coal gangue

Glass-ceramics fabricated by efficiently utilizing coal gangue

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