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粉煤灰基复合材料固化泥浆力学特性试验研究 被引量:1

Experimental study on mechanical properties of fly ash-based composite solidified mud
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摘要 针对高层建筑、高速道路和大型桥梁中钻孔灌注桩施工法产生的废弃泥浆,采用电石渣、粉煤灰、脱硫石膏3种工业固废形成复合材料对其进行固化处理,以期达到以废治废的目的。对不同电石渣和脱硫石膏掺量固化泥浆效果和力学特性进行试验研究,结果表明:随着电石渣和脱硫石膏掺量的增加,固化泥浆强度先增加后降低;掺入18%电石渣、12%粉煤灰、4%脱硫石膏时,其7 d抗压强度可达到0.53 MPa,满足固化类路面底基层路基填土的要求;固化泥浆的峰值应力对应的破坏应变为2%~3.75%,且大致随峰值应力的增加而降低。 In view of the waste mud produced by bored pile construction method in high-rise buildings,high-speed roads and large bridges,calcium carbide slag,fly ash and desulfurization gypsum are used to form composite materials for solidification treatment so as to achieve the purpose of waste treatment.The effect and mechanical properties of solidified mud with different contents of calcium carbide slag and desulfurization gypsum were studied.The results show that with the increase of calcium carbide slag and desulfurization gypsum content,the strength of solidified mud increases first and then decreases.When 18%calcium carbide slag,12%fly ash and 4%desulfurization gypsum are added,the 7 d compressive strength can reach 0.53 MPa,which meets the requirements of solidified pavement subbase roadbed filling.The failure strain corresponding to the peak stress ranges from 2%to 3.75%,and decreases with the increase of peak stress.
作者 许皇瑞 王强 葛单单 吴刘燕 XU Huang-rui;WANG Qiang;GE Dan-dan;WU Liu-yan(School of Civil Engineering&Architecture,Anhui University of Science&Technology,Huainan 232001,China;Institute of Environment-friendly Materials&Occupational Health(Wuhu),Anhui University of Science&Technology,Wuhu 241003,China)
出处 《河南城建学院学报》 2022年第2期32-36,48,共6页 Journal of Henan University of Urban Construction
基金 安徽理工大学环境友好材料与职业健康研究院研发专项基金资助项目(ALW2020YF13)。
关键词 固化泥浆 粉煤灰 无侧限抗压强度 应力-应变关系 solidified mud fly ash unconfined compressive strength stress-strain relationship
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