The effect of superplasticizer admixture on the engineering characteristics of roller-compacted concrete pavement

Hashemi, Mohammad; Shafigh, Payam; Asadi, Iman; Mahpour, Alireza; Samadian, Arash

doi:10.1080/10298436.2020.1858483

Cited by 10 publications

(9 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Interestingly, addition of superplasticizers showed a slight improvement in Vebe density for fine RCA mixtures by 1.5% in both dry and SSD states. A similar behavior was observed when conventional RCCP mixtures were produced with superplasticizers ( 57 ). This improvement could be attributed to better compaction facilitated by superplasticizers, thereby developing a denser aggregate structure for fine RCA mixtures (Figure 5 b ).…”

Section: Resultssupporting

confidence: 71%

Enhancing the Performance of Roller-Compacted Concrete Pavement by Synergetic Improvement of Packing Density, Lubrication, and Moisture State of Recycled Concrete Aggregate

Selvam

Singh

Anjana

2023

Transportation Research Record: Journal of the Transportation R

View full text Add to dashboard Cite

Roller-compacted concrete pavement (RCCP) is considered superior to other pavement types with reference to cost, ease of construction, and performance. However, the aggregate demand is significantly higher in RCCP than in the conventional concrete pavement. It is predicted that natural minable limestone sources would be exhausted in India in the next 30 to 40 years. One way to reduce the natural aggregates (NA) requirements in RCCP is through the integration of recycled concrete aggregates (RCA). However, the physical property of RCA is significantly inferior to that of NA owing to the presence of adhered mortar (AM), which increases the water demand by 2.3 to 4.6 times and affects the compactness and hardened-state behavior of RCCP. This study has tried to enhance the compactness and improve the performance of RCCP containing RCA (coarse, fine, and total RCAs) through different synergetic approaches. This, in turn, enhances the interlocking capacity using the particle packing approach, followed by mitigating the negative effects of AM by altering the moisture states, then improving the compactability and lubricating the matrix with superplasticizers. The results depict that altering the moisture states alone could adversely affect the RCCP performance because of the moisture transfer mechanism from the hydraulic gradient. Moreover, the inclusion of superplasticizers in different moisture states could manifest better aggregate rearrangement and compactability. Further, it could improve the tensile behavior of the RCCP compared with the concrete containing NA. These findings favor the complete replacement of NA by RCA for low-volume rural road construction.

show abstract

Section: Resultssupporting

confidence: 71%

Enhancing the Performance of Roller-Compacted Concrete Pavement by Synergetic Improvement of Packing Density, Lubrication, and Moisture State of Recycled Concrete Aggregate

Selvam

Singh

Anjana

2023

Transportation Research Record: Journal of the Transportation R

View full text Add to dashboard Cite

show abstract

“…Various mineral admixtures such as fly ash, silica fume, rice husk ash can be used in roller compacted concrete, as well as chemical admixtures such as plasticizers, set accelerators and retarders [6][7][8][9][10][11][12]. According to the Concrete Roads Technical Specification [13], airentraining, water-reducing, high-range waterreducing, set retarding chemical admixtures and concrete admixtures that provide long workability time are used in production of concrete pavements, these chemical admixtures used to improve concrete properties must comply with TS EN 934-1 [14] and TS EN 934-2 [15] standards.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, excessive use of superplasticizers causes the presence of excess water, this water fills the pore volume, and then leaves voids in the hardened RCC matrix by drying, so microcracks develop in the concrete during loading, premature fracture occurs and bending strength reduces [18]. Generally, the use of plasticizers in roller compacted concrete creates a denser concrete structure, decreases the concrete porosity, and increases the thermal conductivity [12].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Efficiency of Ultra High Range Water Reducing Admixture in Roller Compacted Concrete Production

Kiliç

Gök

2022

Sakarya University Journal of Science

View full text Add to dashboard Cite

In this study, roller compacted concretes were produced by using polycarboxylate-based third generation high-performance mortar and concrete admixture, which provides ultra-high range water reduction and long workability time. In roller compacted concrete production, the chemical admixture dosage was 1%, which was the maximum dosage recommended by the manufacturer, and the amount of water used was reduced by 10, 20, 30 and 40% compared to the concrete produced without the use of concrete admixture. The physical and mechanical properties of the roller compacted concrete specimens were investigated. When the ultra-high range water reducer was used as 1% of the cement weight in the production of roller compacted concrete, optimum values in terms of unit weight, compressive strength, water absorption, ultrasonic pulse velocity and dynamic modulus of elasticity were obtained by reducing the mixing water by 10%. Although the water/cement ratio decreased, further reduction in water amount resulted in a decrease in compressive strength and affected the concrete quality negatively.

show abstract

“…The excess use of superplasticizers causes the presence of excess water that fills the pore volume, this water leaves the voids in the hardened roller compacted concrete matrix by drying, and then microcracks develop in the concrete during loading, premature fracture occurs and bending strength reduces (Adamu et al, 2017a). Addition of plasticizers in roller compacted concrete decreases the concrete porosity, creates a denser concrete structure, and increases the thermal conductivity of concrete (Hashemi et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…water reducers, accelerators, retarders, etc.) (Harrington et al, 2010;Modarres and Hosseini, 2014;Pektas, 2015;Sengun et al, 2017;TCMB, 2018;Nero, 2019;Yetim and Yilmaz, 2019;Shen et al, 2020;Hashemi et al, 2020;Mardani-Aghabaglou et al, 2020;Kilic and Gok, 2021c). Since super plasticizers reduce the water requirement in concrete mixture, the compressive strength increases due to the decrease in the water/cement ratio with the use of super plasticizers (Kilic, 2014).…”

Section: Introductionmentioning

confidence: 99%

A study on investigating the effect of lignosulfonate-based com-paction aid admixture dosage on the properties of roller com-pacted concrete

Gök

Kılıç²

2022

rdlc

View full text Add to dashboard Cite

In this study, roller compacted concrete was produced by using a modified lignosulfonate-based chemical admixture which is suitable for use in wet, semi-dry or zero slump concrete, and the effect of admixture dosage on the physical and mechanical properties of the concrete was investigated. In the production of roller compacted concrete, the cement content was 300 kg/m3 and the chemical admixture dosages have been changed as 0%, 0.3%, 0.6% and 0.9%. Percentage of compactibility, total water absorption, unit weight, ultrasonic pulse velocity, dynamic modulus of elasticity, concrete compressive strength at the ages of 3 and 28 days were determined for the roller compacted concrete specimens. Roller compacted concrete with the lowest percentage of water absorption, the highest percentage of compactibility, ultrasonic pulse velocity, compactness, compressive strength and dynamic modulus of elasticity was the concrete produced with 0.6% admixture dosage. With the concrete design and the chemical admixture in question, it has been observed that the optimum dosage of chemical admixture for the production of the best quality concrete in terms of the concrete properties examined was 0.6%.

show abstract

The effect of superplasticizer admixture on the engineering characteristics of roller-compacted concrete pavement

Cited by 10 publications

References 33 publications

Enhancing the Performance of Roller-Compacted Concrete Pavement by Synergetic Improvement of Packing Density, Lubrication, and Moisture State of Recycled Concrete Aggregate

Enhancing the Performance of Roller-Compacted Concrete Pavement by Synergetic Improvement of Packing Density, Lubrication, and Moisture State of Recycled Concrete Aggregate

Investigation of the Efficiency of Ultra High Range Water Reducing Admixture in Roller Compacted Concrete Production

A study on investigating the effect of lignosulfonate-based com-paction aid admixture dosage on the properties of roller com-pacted concrete

Contact Info

Product

Resources

About