Delving into the role of microwave curing on the strength and cement hydration features of cemented tailings backfill  

作　　者：Wei Sun Di Wu Erol Yilmaz Guanding Yang Jie Liu 

机构地区：[1]Faculty of Public Security and Emergency Management,Kunming University of Science and Technology,Kunming 650093,China [2]School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China [3]Department of Civil Engineering,Geotechnical Division,Recep Tayyip Erdogan University,Fener,Rize TR53100,Turkey

出　　处：《Green and Smart Mining Engineering》2024年第3期289-298,共10页绿色与智能矿业工程（英文）

基　　金：the National Key Research and Development Program of China(No.2022YFC2905600);the National Natural Science Foundation of China(No.52374110).

摘　　要：Cemented tailings backfill(CTB)comprises tailings,binders,and water and is filled into goaves to regulate the ground pressure and ensure production safety.Thus,shortening the curing time of CTB has been a popular research topic in backfill mining as it maximizes the extraction of the neighboring stopes while lowering mining-related costs.In this study,a self-made horn microwave experimental device was developed to rapidly enhance CTB’s strength property.Subsequently,the microwave-curing effects on the upper surface temperature,strength,deformation coefficient,and hydration reaction of CTB were explored through uniaxial compressive strength,X-ray diffraction,and thermogravimetric/differential thermogravimetric experiments.Experimental marks revealed that the strength property of early-aged(up to 7 d)CTB composites could be rapidly enhanced by microwave curing,except for the 7-d-cured fills with microwave curing times of 5–7 min.Moreover,the hydration reactions of CTB after 3-and 7-d curing were substantially accelerated by microwave curing.Thus,this study offers a novel method of satisfactorily increasing early-aged CTB strength and exploring its hydration mechanisms effectively.

关 键 词：Cementitious mine backfill MICROWAVE CURING Mechanical property Hydration reaction 

分 类 号：TD926.4[矿业工程—选矿]