Choudhary Jayvant, Kumar Brind, Gupta Ankit
Department of Civil Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, India.
Waste Manag. 2018 Aug;78:417-425. doi: 10.1016/j.wasman.2018.06.009. Epub 2018 Jun 23.
This study investigates the suitability of seven different waste materials as fillers in place of conventional material in dense graded bituminous macadam mix. Waste materials under consideration are glass powder, limestone dust, red mud, rice straw ash, brick dust, carbide lime and copper tailings. Ordinary Portland cement was adopted as a conventional filler. Detailed physical, geometrical and chemical characterization of fillers was carried out. Thereafter, bituminous mixes were prepared using waste materials and their strength, volumetric properties and performance against various distresses (rutting, cracking and moisture susceptibility) were assessed. At similar bitumen content, all waste modified mixes delivered satisfactory mechanical and volumetric performances as demanded by paving specifications. Mixes with finer fillers (red mud and limestone dust) displayed superior stiffness and cracking resistance. Similarly mixes having filler with a predominance of calcium minerals (carbide lime and limestone dust) displayed superior adhesion and moisture resistance.
本研究调查了七种不同废料作为填料替代密级配沥青碎石混合料中传统材料的适用性。所考虑的废料有玻璃粉、石灰石粉、赤泥、稻壳灰、砖粉、电石渣和铜尾矿。采用普通硅酸盐水泥作为传统填料。对填料进行了详细的物理、几何和化学特性表征。此后，使用废料制备沥青混合料，并评估其强度、体积特性以及抵抗各种病害（车辙、开裂和水敏感性）的性能。在相似的沥青含量下，所有废料改性混合料均表现出符合铺路规范要求的令人满意的力学和体积性能。含有较细填料（赤泥和石灰石粉）的混合料表现出更高的刚度和抗裂性。同样，含有以钙矿物为主的填料（电石渣和石灰石粉）的混合料表现出更好的粘附性和抗水性。
