Ullah Sheraz, Shah Muhammad Izhar, Alqurashi Muwaffaq, Javed Muhammad Faisal, Dawood Osama, Aslam Fahid, Tariq Muhammad Atiq Ur Rehman, Hussain Enas E
Department of Civil Engineering, COMSATS University Islamabad, Abbottabad Campus, Abbottabad 22060, Pakistan.
Department of Civil Engineering, College of Engineering, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia.
Materials (Basel). 2022 Mar 29;15(7):2509. doi: 10.3390/ma15072509.
The consumption of waste materials in the construction sector is a sustainable approach that helps in reducing the environmental pollution and decreases the construction cost. The present research work emphasizes the mechanical properties of bituminous concrete mix prepared with crumb rubber (CR) and waste sugarcane bagasse ash (SCBA). For the preparation of bituminous concrete mix specimens with CR and SCBA, the effective bitumen content was determined using the Marshall Mix design method. A total of 15 bituminous concrete mix specimens with 4%, 4.5%, 5%, 5.5% and 6% of bitumen content were prepared, and the effective bitumen content turned out to be 4.7%. The effect of five different CR samples of 2%, 4%, 6%, 8% and 10% by weight of total mix and SCBA samples of 25%, 50%, 75% and 100% by weight of filler were investigated on the performance of bituminous concrete. A total of 180 samples with different percentages of CR and SCBA were tested for indirect tensile strength (ITS) and Marshall Stability, and the results were compared with conventional bituminous concrete mix. It was observed that the stability values rose with an increase in CR percentage up to 6%, while the flow values rose as the percentage of SCBA increased in the mix. Maximum ITS results were observed at 4% CR and 25% SCBA replacement levels. However, a decrease in stability and ITS result was observed as the percentages of CR and SCBA increased beyond 4% and 25%, respectively. We concluded that the optimum CR and SCBA content of 4% and 25%, respectively, can be effectively used as a sustainable alternative in bituminous concrete mix.
建筑行业对废料的利用是一种可持续的方法，有助于减少环境污染并降低建筑成本。目前的研究工作着重于用橡胶颗粒（CR）和废弃甘蔗渣灰（SCBA）制备的沥青混凝土混合料的力学性能。为了制备含有CR和SCBA的沥青混凝土混合料试件，采用马歇尔混合料设计方法确定有效沥青含量。共制备了15个沥青含量分别为4%、4.5%、5%、5.5%和6%的沥青混凝土混合料试件，有效沥青含量为4.7%。研究了总混合料重量的2%、4%、6%、8%和10%的五种不同CR样品以及填料重量的25%、50%、75%和100%的SCBA样品对沥青混凝土性能的影响。对180个不同CR和SCBA百分比的样品进行了间接拉伸强度（ITS）和马歇尔稳定性测试，并将结果与传统沥青混凝土混合料进行了比较。观察到稳定性值随着CR百分比增加到6%而上升，而流值随着混合料中SCBA百分比的增加而上升。在CR替换水平为4%和SCBA替换水平为25%时观察到最大ITS结果。然而，当CR和SCBA的百分比分别超过4%和25%时，观察到稳定性和ITS结果下降。我们得出结论，分别为4%和25%的最佳CR和SCBA含量可有效地用作沥青混凝土混合料中的可持续替代品。
