1. Evaluation of the performance of semi-flexible pavement contained sustainable grout material.
- Author
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Al-Zerejawy, Hussein K. and Al-Humeidawi, Basim H.
- Subjects
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GROUT (Mortar) , *FLEXIBLE pavements , *ASPHALT modifiers , *GROUTING , *WASTE paper , *PAVEMENT management , *ASPHALT , *PAVEMENTS , *MECHANICAL abrasion - Abstract
In recent years a new type of pavement has gained popularity in the United Kingdom this type is called Semi flexible Pavements (SFP). It consists of porous asphalt with high air voids between (25-35) % and is filled with cementitious grout materials. SFP is a combination road surface that incorporates the effects of both porous asphalt and cement paste grout. In addition it has proven to function well in strongly loaded freeways and airport pavement. The primary goal of this research was to assess the performance and durability of SFP contained sustainable grout material. The Reed Waste Ash (RWA) was adopted as a partial replacement for conventional grout material and Ordinary Portland cement (OPC) used in SFP. Also superplasticizer (SP) was used to improve the fluidity of grout and waste paper fiber (W-PF) was used as a modifier for asphalt binder. The indirect Tensile Stress (ITS) and Tensile Strength Ratio (TSR) tests were used to evaluate the resistance of new SFP to cracking and moisture susceptibility while the wheel track test was used to assess the resistance to permanent deformation. The results showed that the SFP containing OPC+10% RWA enhanced the moisture susceptibility of SFP up to 83.52 %. In addition, the result of the abrasion test of the SFP mixture containing OPC+10%RWA gives a great improvement, reached to 55% and 88% for unaged and aged specimens, respectively, when compared to the control mix. The rutting resistance was improved by 85% for the above mentioned replacement. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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