Effect and mechanism of calcium carbonate whisker on asphalt binder

Xing, Xiangyang; Pei, Jianzhong; Li, Rui; Tan, Xiaoyong

doi:10.1088/2053-1591/aafa2c

Cited by 24 publications

(10 citation statements)

References 28 publications

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“…DSR was originally developed to evaluate the viscoelasticity of asphalt binder, and the binder's dynamic rheological performance was estimated by DSR testing in this work [25][26][27]. In many previous studies, DSR testing has been used to evaluate asphalt binders' high-and low-temperature performance [28][29][30][31][32][33][34]. In this paper, DSR tests were conducted using a Smart Pave 102 DSR rheometer (Anton Parr).…”

Section: Rheological Propertiesmentioning

confidence: 99%

Preparation and the Effect of Surface-Functionalized Calcium Carbonate Nanoparticles on Asphalt Binder

Shen

Pei

et al. 2019

Applied Sciences

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To solve the nanoparticles (NPs) agglomeration phenomena of nanometer calcium carbonate (nano-CaCO3) modified asphalt binder, in this paper, solvent-free CaCO3 nanofluids (NFs) were prepared based on surface-functionalized CaCO3 NPs to study the effect on asphalt. Microscopic structures, compositions, and thermal stability were characterized by Fourier transform infrared spectrometer (FTIR), X-ray diffractometer (XRD), transmission electron microscope (TEM), and thermogravimetric analyzer (TGA), respectively. Results showed that perfect CaCO3 NFs were successfully prepared, and were good enough for asphalt mixing due to their excellent thermal stability. Scanning electron microscopy (SEM), conventional tests, dynamic shear rheometry (DSR), and bending beam rheometry (BBR) were conducted to investigate the modifying effect. The SEM results indicated that CaCO3 NFs had better compatibility with asphalt binder than original CaCO3 NPs. Conventional and DSR test results demonstrated that CaCO3 NFs had slight negative effects on high-temperature performance while improving the low-temperature performance of the asphalt binder. The BBR test results confirmed that the modifier addition effectively enhanced asphalt binders’ low-temperature crack resistance performance.

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Section: Rheological Propertiesmentioning

confidence: 99%

Preparation and the Effect of Surface-Functionalized Calcium Carbonate Nanoparticles on Asphalt Binder

Shen

Pei

et al. 2019

Applied Sciences

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“…This spatial three-dimensional network structure not only ensured that the mixture had a certain strength, but also prevented excessive deformation of the mixture when the asphalt was softened under high temperature conditions. Therefore, in actual engineering applications, a small content of cement was generally added to improve the water stability, early strength and rutting resistance of CRME [ 21 , 23 , 24 ].…”

Section: Resultsmentioning

confidence: 99%

Research on Low Temperature Performance of Emulsified Asphalt Cold Recycled Mixture and Improvement Measures Based on Fracture Energy

et al. 2020

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At present, there are no specific indicators and requirements for the low-temperature crack resistance of emulsified asphalt cold recycled mixture (CRME) in the Chinese road mixture specifications. In order to expand the application of this technology in the asphalt surface layer in cold areas, this paper studied the influence of 10 influencing factors on the low-temperature anti-cracking performance of CRME through the semicircular bending test (SCB) with fracture energy as the evaluation index. The research results show that the fracture energy index of the SCB test can be used to evaluate the low temperature crack resistance of CRME. After 10 kinds of influencing factors were analyzed, it was found that the biggest factor affecting the low-temperature cracking resistance of the mixture was the recycling agent, which had an effect on the fracture energy index of over 60%. Followed by cement, fiber and compaction work, the degree of influence exceeded 30%. Finally, combined with engineering application experience, some specific measures to improve the low-temperature anti-cracking performance of CRME were proposed.

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“…The by-product NH 4 Cl can be obtained by evaporating the reaction filtrate, which can reduce the production economic costs. Aragonite samples prepared in the study can be used in packing fields to improve the mechanical strength of composite materials [31] and to replace asbestos for friction and seal materials.…”

Section: Preparation Of Aragonitementioning

confidence: 99%

Synthesis and characterization of calcium carbonate whisker from yellow phosphorus slag

et al. 2020

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AbstractIn this study, a procedure for producing calcium carbonate whisker through yellow phosphorus slag carbonation without adding any crystal control agents was proposed. The influence of process parameters on the crystal phase and morphology of the product was discussed. The content of aragonite in the product was more than 90% under optimal conditions. The whiteness of the product was 97.6%. The diameter of a single particle was about 1.5–3 μm, and the length of a single particle was about 8–40 μm. Various polymorphs and morphologies of CaCO3 could be formed by adjusting the production conditions. The by-products produced during the whole preparation process could also be reused. The whole preparation process of fibrous aragonite from yellow phosphorus slag without using any chemical additives was also proposed. These indicated that the production strategy had a good application prospect.

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Effect and mechanism of calcium carbonate whisker on asphalt binder

Cited by 24 publications

References 28 publications

Preparation and the Effect of Surface-Functionalized Calcium Carbonate Nanoparticles on Asphalt Binder

Preparation and the Effect of Surface-Functionalized Calcium Carbonate Nanoparticles on Asphalt Binder

Research on Low Temperature Performance of Emulsified Asphalt Cold Recycled Mixture and Improvement Measures Based on Fracture Energy

Synthesis and characterization of calcium carbonate whisker from yellow phosphorus slag

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