Abstract
Abstract This study evaluated the effects of the incorporation of a new additive to asphalt cement oil (CAP). A polyol product was obtained through the oxypropylation reaction of sugarcane bagasse. This polyol was polymerised with pyromellitic anhydride in order to obtain a polyester (BCP) to test its suitability in terms of the material properties to be applied as additives. FTIR spectra of the polymerised material (BCP) confirmed the occurrence of chemical modification due to the appearance of a new band at 1750 cm-1, characteristic of ester groups. The TGA data showed that the BCP product had higher thermal stability than the polyol. According to the softening point and elastic recovery tests, the incorporation of 11% and 16% w/w BCP in conventional CAP met the specifications of regulatory standards.
Highlights
For most road applications, conventional asphalt exhibitsAs CAP constitutes 25 to 40% of the coating cost[1], good behaviour which satisfies the requirements necessary it is feasible to study the applicability of the polymerised for proper performance in traffic and under normal weather material (BCP) as an alternative source to reduce the conditions
The band observed at around 2800-3000 cm-1 can be attributed to aliphatic CH bonds, the band around 1675-1759 cm-1 is most likely associated with the carbonyl groups (C=O) present in the lignins and hemicelluloses, bands around 1000-1250 cm-1 which are characterisitic of C-O bonds that correspond to ethers link structures present in lignin, cellulose and hemicellulose, and a band at 1515 cm-1, which is indicative of the presence of lignin and can be attributed to the C=C vibration of aromatic rings[5]
Based on these results it was observed that the oxypropylation reaction of BC was effective in producing a viscous polyol, BCO, which can be used in the synthesis of new polymers
Summary
As CAP constitutes 25 to 40% of the coating cost[1], good behaviour which satisfies the requirements necessary it is feasible to study the applicability of the polymerised for proper performance in traffic and under normal weather material (BCP) as an alternative source to reduce the conditions. Materials and Methods have been investigated are natural asphalt, gilsonita or asphaltite, but especially polymers of various kinds that 2.1 Obtaining sugarcane bagasse improve the performance of the binder. The use of polymer-modified asphalts can reduce the frequency of maintenance and increase the life-time of local service roads which are difficult to access or suffer from a high-cost penalty for traffic interruption, should repairs be required[1]. Due to its low cost, abundance and easy availability, sugarcane bagasse (BC) is often used as a raw material for oxypropylation reactions with a view to producing a viscous polyol (BCO). This reaction makes the hydroxyls of the starting biomass (BC) more accessible for further reactions.
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