Performance and Microanalysis of Cement Asphalt Mortar With Admixture of Coal Fly Ash

Yao, Yuan; Sun, Hongjuan

doi:10.5539/jmsr.v1n2p193

Cited by 7 publications

(4 citation statements)

References 4 publications

(4 reference statements)

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“…Table 1 Specification of CAM (Chinese Railway Specification, 2008) [12]. Polymers with excellent adhesive properties are proposed as modifying materials to increase the interface bonding strength of CAM [7,14].…”

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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“…Cement and asphalt emulsion composite does not give a new binder or new crystalline substances. The microstructure of cement-asphalt emulsion showed the hydration product the needle-like ettringite structure and more porous than asphalt emulsion mixtures and cement mixtures [10, 15,18,23].…”

Section: Introductionmentioning

confidence: 99%

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

Pichayapan¹,

Nanthavisit²,

Jitsangiam³

2019

GEOMATE

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It is known that cement has been used as a stabilizing agent for the road pavement stabilization. However, it could cause an adverse effect of premature cracking on the road. Moreover, asphalt emulsion has been a famous agent for pavement stabilizing as well, even though it has revealed low deformation resistance. Therefore, this research aims to investigate resulting from the mixture of cement and asphalt emulsion, which is called cement-asphalt emulsion as a new stabilizing agent. This mixture provides more flexibility and waterproofing by using asphalt emulsion features, and high strength from cement. Cement-asphalt emulsion mortar; the mixture of Portland cement type I, cationic asphalt emulsion (CSS-1), and standard sand, were used as the study material. Cement-asphalt emulsion mortar was a various type of cement and asphalt emulsion ratios for the compressive strength test and flexural strength test. The test results presented that the compressive strength and the flexural strength decrease with an increase of asphalt emulsion. Ratio 4:1 (cement: asphalt emulsion) exhibited the highest compressive strength and the flexural strength at 7 days and 28 days testing with controlled relative humidity curing. This ratio then should be recommended to apply in pavement stabilization.

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“…There are few publications focusing on its rheological behavior. The fly ash admixture was introduced to improve the separation rate and expansion of CA martor [11].…”

Section: Introductionmentioning

confidence: 99%

A Novel Method for Improving Segregation Resistance of Cement Asphalt Mortar

Liu¹,

Jin²,

Chi³

2017

dtetr

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Cement asphalt mortar (CA mortar) is the key component in the structure of Shinkansen slab track and serves as the elastic shock-absorber. CA mortar is a fluid mixture suitable for placing in structures without vibration. CA mortar development must ensure a good balance between fluidity and stability. Hydrophobically associating watersoluble polymers not only have the unique advantage of segregation resistance but also good properties of fluidity. The fluidity and segregation tests show that by adding hydrophobic associative polymer the degree of segregation of CA mortar is reduced without sacrificing the fluidity and workable time. The rheological test of CA mortar shows that the addition of hydrophobic associative polymer increases the viscosity and shear stress at low shear rates, but the viscosity and shear stress drops at high shear rates, imposing large resistances which alleviate the extent of segregation of CA mortar. The results show that hydrophobic associative polymer could be used successfully in producing CA mortar with reduced segregation potential.

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Performance and Microanalysis of Cement Asphalt Mortar With Admixture of Coal Fly Ash

Cited by 7 publications

References 4 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

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

A Novel Method for Improving Segregation Resistance of Cement Asphalt Mortar

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