Cellulose Microfibril and Micronized Rubber Modified Asphalt Binder

Fibers

AbduA. Danladi¹  Umar Ishiaku¹  MohammedK. Yakubu¹  Abdel-FattahM. Seyam²  Thomas Theyson²  Ang Li²  Rahul Vallabh² 

[1] Department of Polymer and Textile Engineering, Ahmadu Bello University, Zaria 810107, Nigeria;Wilson College of Textiles, North Carolina State University, Raleigh, NC 27606, USA;

关键词: cellulose microfibril;    micronized rubber powder;    asphalt binder;    penetration depth;    softening point;    penetration index;   

DOI  :  10.3390/fib9040025

来源: DOAJ

【 摘 要 】

Cellulose microfibrils (CMFs) and micronized rubber powder (MRP) can be derived from low or negative-cost agricultural/industrial waste streams and offer environment-friendly and cost-effective pathways to develop engineering products. This study investigated the efficacy of adding these micromodifiers on the performance characteristics of asphalt binders. In this work, samples were produced using a mixture of slow-setting anionic asphalt emulsion with various combinations of MRP (at 0, 2 and 10 wt %) and four types of CMFs (hydrophobic and hydrophilic with crystalline ratios of 86% and 95%) at 0, 2 and 5 wt %. The performance of modified asphalt samples was assessed by penetration depth (PD), softening point (SP), and penetration index (PI). Linear regression analysis showed that adding CMFs and/or MRP reduced PD and increased SP values. The type of CMFs significantly affected the performance, which becomes more distinct with the increased weight content of CMFs. While hydrophilic CMFs caused increases in SP and PI values, no clear trend was seen to determine the effect of CMF crystallinity. It was also discovered that the combined addition of CMF and MRP achieved similar PI values at lower total weight content compared to using MRP alone.

【 授权许可】

Unknown