scholarly journals ASPHALT CONCRETE MIXTURE PRODUCED USING RECLAIMED ASPHALT PAVEMENT AND FLY ASH AS ARTIFICIAL AGGREGATE AND FILLER

2021 ◽  
Vol 83 (4) ◽  
pp. 17-29
Author(s):  
Ari Widayanti ◽  
Ria Asih Aryani Soemitro ◽  
Januarti Jaya Ekaputri ◽  
Hitapriya Suprayitno
Keyword(s):  
Fly Ash ◽  
Water Absorption ◽  
Asphalt Concrete ◽  
Asphalt Pavement ◽  
High Water ◽  
Reclaimed Asphalt Pavement ◽  
Infrastructure Development ◽  
Reclaimed Asphalt ◽  
Alkali Activator ◽  
High Water Absorption

This study presents the use of reclaimed asphalt pavement (RAP), and fly ash as artificial aggregate and filler in asphalt concrete. Because of the limited availability of natural materials, infrastructure development has become a concern. Therefore, it is necessary to reuse and recycle waste materials. One such innovation is artificial aggregates. The disadvantage of RAP is that its gradation exceeds the standard; its asphalt penetration and ductility exceed the requirements. The weaknesses of artificial aggregate are high water absorption, spherical shape, and low aggregate interlocking. In this study, the artificial aggregate was produced using the fly ash and alkali activator. Alkali activator consisted of Na2SiO3 and 8M NaOH at a ratio of 2.5. The mixtures containing different percentages of artificial aggregate (45, 55, 65, and 75%) were produced, and the fly ash filler content was 5%. Different tests including XRF, SEM, and Marshall tests were conducted. The artificial aggregate is hydrophilic owing to the high silica content; thus, it has high water absorption. This results in a low adhesion between the asphalt and aggregate. The best composition of asphalt concrete is 55% artificial aggregate, RAP, fly ash filler, and asphalt. The asphalt concrete containing artificial aggregate has high stability and is stiff and light. However, it requires a high asphalt content because of high water absorption. It is unsuitable for application in high traffic roads but suitable for medium traffic ones.

scholarly journals The Usage of Fly Ash for Reclaimed Asphalt Pavement (RAP), Asphalt Concrete Binder Course (AC-BC) Filler

2017 ◽  
Vol 0 (2) ◽  
pp. 23
Author(s):  
Ratna Handayani ◽  
Ria Asih Aryani Soemitro ◽  
Herry Budianto ◽  
Januarti Jaya Ekaputri
Keyword(s):  
Fly Ash ◽  
Asphalt Concrete ◽  
Asphalt Pavement ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt

Durability of reclaimed asphalt pavement–coal fly ash–carbide lime blends under severe environmental conditions

2018 ◽  
Vol 21 (2) ◽  
pp. 557-569 ◽  
Author(s):  
Nilo Cesar Consoli ◽  
Hugo Carlos Scheuermann Filho ◽  
Vinicius B. Godoy ◽  
Caroline M. De Carli Rosembach ◽  
J. Antonio H. Carraro
Keyword(s):  
Fly Ash ◽  
Environmental Conditions ◽  
Asphalt Pavement ◽  
Coal Fly Ash ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt

scholarly journals Development of Mix Designs for Minimally Refined Reclaimed Asphalt Pavement (RAP) Concrete for Florida Concrete Test Road

2018 ◽  
Vol 10 (8) ◽  
pp. 2598 ◽  
Author(s):  
Sangyoung Han ◽  
Hung-Wen Chung ◽  
Thanachart Subgranon ◽  
Mang Tia
Keyword(s):  
Fly Ash ◽  
Asphalt Pavement ◽  
Preliminary Test ◽  
American Concrete Institute ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt ◽  
Cement Replacement ◽  
Florida Department ◽  
Test Road ◽  
Pavement Concrete

The main objective was to develop mix designs for concrete incorporating minimally processed reclaimed asphalt pavement (RAP) materials to be used in the Florida Concrete Test Road. The laboratory program was conducted in two phases. Phase I involved testing of twelve (12) trial mixes to identify feasible mixes which could meet the Florida Department of Transportation (FDOT) specification requirements for pavement concrete. Based on the preliminary test results from the trial mixes, ten (10) production mixes were identified and evaluated more extensively in Phase II to establish the optimum concrete mixes incorporating RAP to be recommended. Concrete mixtures, with 0% to 40% RAP as aggregate replacement and using 20% fly ash and 50% slag as cement replacement, were designed using the optimized aggregate gradation (OAG) technique instead of the American Concrete Institute (ACI) method. Among the RAP concrete evaluated, the 20% RAP concrete mixes with 0%, 20% fly ash, and 50% slag as cement replacement were able to meet Florida Department of Transportation’s (FDOT) over-design compressive strength of 29 MPa (4200 psi) at 28 days. Using 20% and 40% RAP in concrete could result in saving in the total cost of aggregate by 9% and 17%, respectively. When the RAP is not refined (e.g., no washing of RAP, and no separating of coarse and fine portions), it is recommended that 20% of RAP can be used as aggregate replacement in pavement concrete.

scholarly journals The influence of reclaimed asphalt pavement in warm mix asphalt on asphalt concrete binder course with Retona Blend 55

2019 ◽  
Vol 278 ◽  
pp. 01012
Author(s):  
Raudhah ◽  
R. Jachrizal Sumabrata ◽  
Sigit Pranowo Hadiwardoyo
Keyword(s):  
Significant Influence ◽  
Asphalt Concrete ◽  
Asphalt Pavement ◽  
Warm Mix Asphalt ◽  
Public Works ◽  
Reclaimed Asphalt Pavement ◽  
Test Results ◽  
Reclaimed Asphalt ◽  
Marshall Test ◽  
Asphalt Content

Reclaimed asphalt pavement (RAP) comprises removed pavement materials containing high-quality aggregates and asphalt which can be recycled as materials for new pavement construction. It is removed continually for reconstruction, resurfacing, and maintenance purposes, and if not recycled will become waste. This paper determines the influence of using different RAP percentages and asphalt content in warm mix asphalt on the Marshall test results for asphalt concrete binder course (AC-BC) using Retona Blend 55. The percentages of RAP are determined by analyzing the gradation of the existing aggregates in RAP and adding virgin aggregates so that it meets the standard gradation for AC-BC specified by the Ministry of Public Works and Housing. The RAP percentages in the asphalt mixes in this study are 35%, 45%, and 51.55% of total aggregates, while the asphalt contents are 5%, 6%, and 7% of the total mix. To determine the influence of RAP percentage and asphalt content, and to discover if there is any influence from the interaction between these two factors, the analysis is performed using a factorial design. The results of this study show that variation in RAP percentages in the mix has no significant influence on stability, flow, and Marshall quotient, but there is significant influence on void in mineral aggregates (VMA), void in mix (VIM), and void filled with asphalt (VFA). Correlations of 97.5%, 80%, and 95.1%, respectively show that increase in RAP percentage increases VMA and VIM and decreases VFA. The interaction between RAP percentage and asphalt content has no significant influence on Marshall test results.

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