Strength development of Recycled Asphalt Pavement – Fly ash geopolymer as a road construction material

Hoy, Menglim; Horpibulsuk, Suksun; Arulrajah, Arul

doi:10.1016/j.conbuildmat.2016.04.136

Cited by 173 publications

(41 citation statements)

References 34 publications

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“…Because of its excellent performance and energy saving, it has been widely used in many fields. Such as pavement repair [87], 3D printing [88], anticorrosive coatings [89], curing pol-lutants [90,91], etc. Despite many advantages, geopoly-mers have similar disadvantages to cement-based mate-rials, namely poor toughness and relatively low flexural strength [92].…”

Section: Research Progress Of Graphene Modified Geopolymermentioning

confidence: 99%

Review on the research progress of cement-based and geopolymer materials modified by graphene and graphene oxide

Liu

Huang

et al. 2020

Nanotechnology Reviews

193

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AbstractIn recent years, with the higher requirements for the performance of cement-based materials and the call for energy conservation and environmental protection, a wave of research on new materials has set off, and various high-performance concrete and more environmentally friendly geopolymers have appeared in the public. With a view to solving the defects of energy consumption, environmental protection and low toughness of traditional cement-based materials. At the same time, nanomaterials have become a focus of current research. Therefore, the research on the properties of cement-based materials and geopolymers modified by graphene and its derivatives has aroused extensive interest of researchers. Graphene-based nanomaterials are one of them. Because of their large specific surface area, excellent physical properties have been favored by many researchers. This paper reviews the research progress of graphene-based nanomaterials in improving the properties of cement-based materials and geopolymer materials, and points out the main challenges and development prospects of such materials in the construction field in the future.

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Section: Research Progress Of Graphene Modified Geopolymermentioning

confidence: 99%

Review on the research progress of cement-based and geopolymer materials modified by graphene and graphene oxide

Liu

Huang

et al. 2020

Nanotechnology Reviews

193

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“…Recently, FA-based alkali-acivated binder has been considered as a sustainable future construction material. For example, recycled asphalt pavement (RAP) and FA were used to produce a road construction material [22]. Alkaliactivated FA incorporated with slag was used to stabilize the pavement base/subbase applications [23].…”

Section: Introductionmentioning

confidence: 99%

Strength development and durability of alkali-activated fly ash mortar with calcium carbide residue as additive

Hanjitsuwan

Phoo-ngernkham

et al. 2018

Construction and Building Materials

113

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The strength development and durability of alkali-activated fly ash (FA) mortar with calcium carbide residue (CCR) as additive cured at ambient temperature were investigated in this paper. CCR was used to partially replace FA as additional calcium in the alkali-activated binder system by a weight percentage of 0%, 10%, 20% and 30%. Sodium hydroxide and sodium silicate solutions were used as liquid alkaline activation in all mixtures. Test results show that the incorporation of CCR has an effect on the strength development of alkaliactivated FA mortar with CCR. The setting time of alkali-activated FA mortar with CCR has 2 decreased whereas its strength development has increased. This is further confirmed by XRD, SEM, and FTIR analyses, which show that the reaction products were increased when the alkali-activated FA incorporated with CCR. The highest 28-day compressive strength of alkali-activated FA mortar was found in the mix of 70% FA and 30% CCR, which is about 40.0 MPa. In addition, the resistances of alkali-activated FA mortar incorporated with CCR to tap water, 5% H 2 SO 4 solution, and 5% MgSO 4 solution are found to be superior to those of alkali-activated FA mortar without CCR as indicated by the relatively low strength loss. For the samples immersed in 5% H 2 SO 4 solution and 5% MgSO 4 solution for 120 days, the alkali-activated FA incorporated with 30% CCR showed a low strength reduction of around 71% and 53%, respectively.

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“…The SEM pictures showed brick and calcium silicate. SEM images of RAP and fly ash (FA) as well as the XRD for RAP and FA, were presented by Hoy et al (2016). The XRD of RAP contained calcite magnesium, dolomite, quartz, hematite and mulite.…”

Section: Introductionmentioning

confidence: 99%

Effect of Reclaimed Asphalt Pavement Stabilization on the Microstructure and Strength of Black Cotton Soil

Alhaji¹,

Alhassan²

2018

IJTech

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Black Cotton Soil (BCS) collected from Guyuk, Adamawa State-Northeastern Nigeria, was treated with 0 to 100% Reclaimed Asphalt Pavement (RAP) in 10% steps to evaluate the microstructure and strength of the compacted mixtures. The index property results show that the BCS and RAP are classified under clay of high plasticity (CH) and poorly graded sand (SP) respectively, according to the Unified Soil Classification System (USCS). An extraction test gave a RAP bitumen content of 5.99%, which is within the value of 5-6% recommended in the literature. An x-ray diffraction test carried out on both the BCS and RAP showed that the BCS predominantly consisted of quartz, microcline, albite and kaolinite, which is similar to the results obtained in the literature, while the RAP, however, consisted of quartz, albite, orthoclase, phylogopite and actinolite, which is slightly different to what is reported in the literature, probably due to the source of the bitumen. The results of compaction, at a modified energy level, conducted on the mixtures, show that the Maximum Dry Density (MDD) increased from 1.890 to 2.034 mg/m 3 at 30% RAP content, after which the value fell to1.925 mg/m 3 at 100% RAP content. The Optimum Moisture Content (OMC) however, decreased from 13.7% at 0% RAP, to 8.8% at between 40-60% RAP content, after which the value increased marginally to 9.5% at 90% RAP. Similar to the MDD, the California Bearing Ratio (CBR) increased from 11% at 0% RAP to a maximum of 35% at 30% RAP content, after which the value fell to 5% at 100% RAP content. 30% RAP is therefore the optimal mixture giving the highest strength and can be used as a sub-base material for roads with light traffic use, according to the Nigerian General Specification for Road and Bridge Works. Hence the 3.07% bitumen obtained for this mixture can be adopted as the fixation point for BCS-RAP mixtures. Durability was found to be far lower than the resistance to loss in strength of 80% suggested in the literature.

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Strength development of Recycled Asphalt Pavement – Fly ash geopolymer as a road construction material

Cited by 173 publications

References 34 publications

Review on the research progress of cement-based and geopolymer materials modified by graphene and graphene oxide

Review on the research progress of cement-based and geopolymer materials modified by graphene and graphene oxide

Strength development and durability of alkali-activated fly ash mortar with calcium carbide residue as additive

Effect of Reclaimed Asphalt Pavement Stabilization on the Microstructure and Strength of Black Cotton Soil

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