基于多目标-理想点法的洞庭湖淤泥制备轻质骨料最优烧结条件

doi:10.11988/ckyyb.20210852

院报 ›› 2023, Vol. 40 ›› Issue (1): 29-36.DOI: 10.11988/ckyyb.20210852

基于多目标-理想点法的洞庭湖淤泥制备轻质骨料最优烧结条件

陈星佑^1,2, 张聪², 何怀光³, 周双³, 刘旭², 谢梦珊², 谢忠球²

1.广州建设工程质量安全检测中心有限公司,广州 510440;
2.中南林业科技大学土木工程学院,长沙 410004;
3.湖南省水利水电科学研究院,长沙 410007

收稿日期:2021-08-16 修回日期:2022-03-29 出版日期:2023-01-01 发布日期:2023-02-24
通讯作者: 张聪(1988-),男,湖南宁乡人,副教授,博士,主要从事岩土方向的研究。E-mail:zc8023cl@163.com
作者简介:陈星佑(1997-),男,广东湛江人,硕士研究生,主要从事岩土方向的研究。E-mail:510942056@qq.com
基金资助:
湖南省水利科技项目(XSKJ2019081-24);湖南省研究生科研创新项目(CX202102062);湖南省科技创新计划资助项目(2020RC4049)

Multi-objective Optimization of Sintering Condition of Lightweight Aggregate Prepared from Dongting Lake Silt by Ideal Point Method

CHEN Xing-you^1,2, ZHANG Cong², HE Huai-guang³, ZHOU Shuang³, LIU Xu², XIE Meng-shan², XIE Zhong-qiu²

1. Guangzhou Testing Centre of Construction Quality & Safety Co.,Ltd.,Guangzhou 510440,China;
2. School of Civil Engineering,Central South University of Forestry and Technology ,Changsha 410004, China;
3. Hunan Institute of Water Resources and Hydropower Research,Changsha 410007,China

Received:2021-08-16 Revised:2022-03-29 Online:2023-01-01 Published:2023-02-24

摘要/Abstract

摘要： 为了解决洞庭湖淤泥产量大、绿色处置技术落后、费用高等难题,从宏微观角度分析了淤泥的物理、化学性能和淤泥的可烧结性;开展正交试验研究了烧结条件与优质轻质骨料性能的关系,构建了多目标-理想点法优化模型,并提出一种可快速获取不同区域淤泥烧结最优条件的方法。研究结果表明:洞庭湖淤泥是一种典型的烧结易膨胀土体,三相图位于Riley三相图所规定的易于膨胀区间,具有烧结制备优质轻质骨料的可行性;洞庭湖淤泥制备轻质骨料的最优烧结条件为预热时间20 min、预热温度410 ℃、烧结时间5 min以及烧结温度1 112 ℃,烧结获取的轻质骨料孔隙率为23.31%、收缩率为5.75%、体积密度为1.28 g/cm³、抗压强度为20.35 MPa、1 h吸水率为14.33%。研究成果可解决洞庭湖淤泥处置难题,也可为其他湖泊淤泥的资源化利用提供新思路。

关键词: 洞庭湖淤泥, 制备轻质骨料, 烧结条件, 正交试验, 多目标-理想点, 再利用

Abstract: The silt from Dongting Lake poses many challenges such as large production and high disposal costs with underdeveloped green disposal technology.A multi-objective model combined with ideal point method was constructed to quickly obtain the optimized sintering condition of silts in different regions.The physical and chemical properties and the sinterability of Dongting Lake silt were first analyzed from macro-and-micro perspectives,and the relationship between sintering conditions and performance of high-quality lightweight aggregates were then obtained by orthogonal experiments.The silt from Dongting Lake is a typical swellable soil when sintered,and is feasible to be prepared into high-quality lightweight aggregate as its three-phase diagram lies in the prone-to-swell zone specified by the Riley three-phase diagram.The optimum sintering conditions for preparing lightweight aggregate from Dongting Lake silt are as follows:20 min preheating time,410 ℃ preheating temperature,5 min sintering time and 1 112 ℃ sintering temperature.The sintered lightweight aggregate had a porosity of 23.31%,shrinkage of 5.75%,bulk density of 1.28 g/cm³,compressive strength of 20.35 MPa and water absorption rate of 14.33% per hour.The research findings help solve the problem of disposal of Dongting Lake silt and also provide new idea for the resource utilization of silt from other lakes.

Key words: Dongting lake slit, lightweight aggregate preparation, sintering conditions, orthogonal test, multi-objective ideal point, recycle

中图分类号:

TV422

陈星佑, 张聪, 何怀光, 周双, 刘旭, 谢梦珊, 谢忠球. 基于多目标-理想点法的洞庭湖淤泥制备轻质骨料最优烧结条件[J]. 院报, 2023, 40(1): 29-36.

CHEN Xing-you, ZHANG Cong, HE Huai-guang, ZHOU Shuang, LIU Xu, XIE Meng-shan, XIE Zhong-qiu. Multi-objective Optimization of Sintering Condition of Lightweight Aggregate Prepared from Dongting Lake Silt by Ideal Point Method[J]. Journal of Yangtze River Scientific Research Institute, 2023, 40(1): 29-36.

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基于多目标-理想点法的洞庭湖淤泥制备轻质骨料最优烧结条件

Multi-objective Optimization of Sintering Condition of Lightweight Aggregate Prepared from Dongting Lake Silt by Ideal Point Method

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