Influence of Cement and Asphalt Emulsion Ratios on Cement-Asphalt Emulsion Mortar

Pichayapan, Preda; Nanthavisit, Patcharapan; Jitsangiam, Peerapong

doi:10.21660/2019.64.08722

Cited by 7 publications

(3 citation statements)

References 12 publications

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“…Cationic asphalt emulsion is used as CAM material because its properties ensure strength in the early stage [9]. It has a lower retardation effect on the hydration process than anionic asphalt emulsion [10]. All these ingredients are mixed and then grouted into the space between the precast concrete slab and the concrete base.…”

Section: Introductionmentioning

confidence: 99%

Polymer-Modified Cement Asphalt Mortar as Interlayer in the Non-Ballasted Track of High-Speed Train

Erlangga

2024

GEOMATE

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Non-ballasted track consists of a concrete slab bonded firmly to the concrete base by a cement asphalt mortar (CAM) as an interlayer for damping. In practice, interface bonding failure occurs on CAM. Styrenebutadiene rubber (SBR) polymer is proposed as a modifying material to increase the interface bonding strength of CAM. The problem of polymer modification in CAM is probably related to poor compatibility and workability. This study aims to investigate the effect of the SBR polymer pH value on the compatibility and workability in CAM. Compatibility is determined by separation rate. Zeta potential value describes polymer-modified asphalt emulsion (PMAE) activity. Workability is determined by funnel fluidity time and slump flow time. Results showed that increasing the SBR polymer pH value decreased the zeta potential of PMAE. Decreasing zeta potential to be value-neutral results in destabilized asphalt droplets, demulsified, separated water, and asphalt coalescence. Finally, the asphalt coalescence is covered by polymer and forms a binding film on cement. It is affecting the compatibility between PMAE and cement hydration. It results in a low separation rate. Compatibility is achieved by SBR polymer pH 10.0 doses ranging from 1% to 6%. SBR polymer dosage of 1% to 3% led to a deceleration in funnel fluidity time and slump flow time associated with elevated demulsification. Their 4% to 6% dose accelerates funnel fluidity time and slump flow time associated with delaying demulsification. Acceptance of compatibility and workability in CAM is proposed using SBR polymer pH 10.0 dosage of 4% to 6%.

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Section: Introductionmentioning

confidence: 99%

Polymer-Modified Cement Asphalt Mortar as Interlayer in the Non-Ballasted Track of High-Speed Train

Erlangga

2024

GEOMATE

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“…Chen et al investigated the effects of temperature and powder/binder ratio on the performance of asphalt mortar mixed with limestone mineral powder, cement and coal fly ash. The research showed that reduced temperature or increased filler-asphalt ratio improved the rutting resistance of the mortar with a disadvantageous influence on the low-temperature performance [9][10]. Chen and Li found that replacing all mineral powder with cement improved the workability of the asphalt mixture [11][12].…”

Section: Introductionmentioning

confidence: 99%

Impact of cement and filler-asphalt ratio on the properties of asphalt mortar

Song¹,

Zheng²,

Mi³

et al. 2023

Vib. proced.

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Matrix and SBS modified asphalt mortar were prepared by replacing mineral powder with cement under different filler-asphalt ratios. The variation laws of ductility, softening point, penetration, cone penetration, and Brookfield rotational viscosity of the two kinds of pastes with filler-asphalt ratio were studied. The shear strength of the two kinds of asphalt mortar was calculated. And the viscosity-temperature curve was established. The best filler-asphalt ratio was recommended. The results show that the addition of cement and the increase of filler-asphalt ratio will reduce the ductility, penetration, and cone penetration of asphalt mortar, while improve the softening point, shear strength, and viscosity. In a specific range of filler-asphalt ratios, cement can improve the high-temperature performance of asphalt mortar without significant impact on the low-temperature performance.

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“…This retarding effect can increase the initial and the final setting times, allowing AE to significantly retard cement hydration at a high AE to cement ratio [38]. In addition, hydration heat is blocked by thin films of AE on the cement particles, resulting in decreases in mechanical strength and stiffness [39][40][41]. No new crystalline substances or chemical functional groups have been found during the interaction process between cement and the AE [42].…”

Section: Introductionmentioning

confidence: 99%

Influence of Asphalt Emulsion Inclusion on Fly Ash/Hydrated Lime Alkali-Activated Material

et al. 2021

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Supplementary cementitious materials have been widely used to reduce the greenhouse gas emissions caused by ordinary Portland cement (OPC), including in the construction of road bases. In addition, the use of OPC in road base stabilization is inefficient due to its moisture sensitivity and lack of flexibility. Therefore, this study investigates the effect of hybrid alkali-activated materials (H-AAM) on flexibility and water prevention when used as binders while proposing a new and sustainable material. A cationic asphalt emulsion (CAE) was applied to increase this cementless material’s resistance to moisture damage and flexibility. The physical properties and structural formation of this H-AAM, consisting of fly ash, hydrated lime, and sodium hydroxide, were examined. The results revealed that the addition of CAE decreased the material’s mechanical strength due to its hindrance of pozzolanic reactions and alkali activations. This study revealed decreases in the cementitious product’s peak in the x-ray diffraction analysis (XRD) tests and the number of tetrahedrons detected in the Fourier transform infrared spectroscopy analysis (FTIR) tests. The scanning electron microscope (SEM) images showed some signs of asphalt films surrounding hybrid alkali-activated particles and even some unreacted FA particles, indicating incomplete chemical reactions in the study material’s matrix. However, the H-AAM was still able to meet the minimum road base strength requirement of 1.72 MPa. Furthermore, the toughness and flexibility of the H-AAM were enhanced by CAE. Notably, adding 10% and 20% CAE by weight to the hybrid alkali-activated binder produced a significant advantage in terms of water absorption, which can be explained by its influence on the material’s consolidation of its matrices, resulting in significant void reductions. Hence, the outcomes of this study might reveal an opportunity for developing a new stabilizing agent for road bases with water-prevention properties and flexibility that remains faithful to the green construction material concept.

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Influence of Cement and Asphalt Emulsion Ratios on Cement-Asphalt Emulsion Mortar

Cited by 7 publications

References 12 publications

Polymer-Modified Cement Asphalt Mortar as Interlayer in the Non-Ballasted Track of High-Speed Train

Polymer-Modified Cement Asphalt Mortar as Interlayer in the Non-Ballasted Track of High-Speed Train

Impact of cement and filler-asphalt ratio on the properties of asphalt mortar

Influence of Asphalt Emulsion Inclusion on Fly Ash/Hydrated Lime Alkali-Activated Material

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