Al-Amoudi Omar S Baghabra, Al-Homidy Abdullah A, Maslehuddin Mohammed, Saleh Tawfik A
Department of Civil and Environmental Engineering, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia.
Department of Civil Engineering, Najran University, Najran, Saudi Arabia.
Sci Rep. 2017 Apr 28;7:46676. doi: 10.1038/srep46676.
This paper reports the method and mechanism for improving the strength of marl and desert sand utilizing electric arc furnace dust (EAFD), an industrial by-product, in lieu of cement or lime. EAFD was used in conjunction with a small quantity (2%) of cement. The mechanical properties and durability characteristics of marl and sand mixed with 2% cement plus 5-, 10-, 20- or 30%-EAFD, by weight of the soil, were evaluated. The soil-cement-EAFD mixtures were used to determine their unconfined compressive strength (UCS), soaked California Bearing Ratio (CBR) and durability. The risk of leaching of toxic heavy metals, such as lead and cadmium, from the stabilized soils to the groundwater was also investigated. The mechanisms of stabilization of the selected soils due to the use of EAFD along with a small quantity of cement are also elucidated. The usage of 20 to 30% EAFD with 2% cement was noted to considerably improve the mechanical properties and durability of both marl and sand.
本文报道了利用工业副产品电弧炉粉尘（EAFD）替代水泥或石灰来提高泥灰岩和沙漠砂强度的方法及机理。EAFD与少量（2%）水泥配合使用。评估了按土重计，泥灰岩和砂与2%水泥加5%、10%、20%或30% EAFD混合后的力学性能和耐久性特征。使用土 - 水泥 - EAFD混合物来测定其无侧限抗压强度（UCS）、饱水加州承载比（CBR）和耐久性。还研究了稳定土中铅和镉等有毒重金属向地下水浸出的风险。同时阐明了使用EAFD和少量水泥对所选土壤进行稳定化处理的机理。结果表明，20%至30%的EAFD与2%的水泥配合使用可显著提高泥灰岩和砂的力学性能及耐久性。
