Extended water/cement ratio law for cement mortar containing recycled asphalt pavement

2019 ◽  
Vol 196 ◽  
pp. 457-467 ◽  
Author(s):  
Komkorn Chaidachatorn ◽  
Jirayut Suebsuk ◽  
Suksun Horpibulsuk ◽  
Arul Arulrajah
Keyword(s):  
Cement Mortar ◽  
Asphalt Pavement ◽  
Recycled Asphalt Pavement ◽  
Recycled Asphalt ◽  
Cement Ratio ◽  
Water Cement Ratio

Compressive Strength and Workability of Cement Mortar Containing Recycled Asphalt Pavement

2020 ◽  
Vol 856 ◽  
pp. 384-390
Author(s):  
Jirayut Suebsuk ◽  
Panupong Panpipat
Keyword(s):  
Compressive Strength ◽  
Water Absorption ◽  
Cement Mortar ◽  
Asphalt Pavement ◽  
Mixing Time ◽  
Unit Weight ◽  
Fine Aggregate ◽  
Recycled Asphalt Pavement ◽  
Initial State ◽  
Recycled Asphalt

This article presents the compressive strength and workability of cement mortar (CM) containing recycled asphalt pavement (RAP) as fine aggregate replacement. The effect of the RAP replacement, water to cement ratio, curing time, and aggregate water absorption on compressive strength and flow workability are reported. The results show that the mixing water and mixing time play a significant role in the compressive strength and unit weight of CM containing RAP. The RAP has a higher water absorption and slower rate of water absorption than those of sand. The flow workability of CM increases with RAP replacement due to the unabsorbed water at the initial mixing stage. The main negative factors that affected the compressive strength of CM containing RAP as a fine aggregate replacement are revealed. The unabsorbed water at the initial state of mixing before hardening causes increased flow workability and decreased compressive strength. The findings from this research will promote the mix design approach of CM containing RAP as a fine aggregate replacement, for moving toward increased applications of recycled materials in a sustainable manner in civil engineering construction.

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