摘要
为了改善西安灞河疏浚底泥的力学性质,实现疏浚底泥的资源化利用,在传统硅酸盐水泥固化基础上,添加了生石灰、聚丙烯、矿渣及高分子吸水树脂,并通过无侧限抗压强度试验分析了不同掺量组合的固化材料对高含水率疏浚底泥不同龄期的强度影响及固化材料掺量与疏浚底泥强度的相关性。结果表明,矿渣与水泥掺量对疏浚底泥强度影响显著,生石灰掺量对疏浚底泥强度影响较为显著;聚丙烯和高分子吸水树脂掺量对疏浚底泥强度影响不显著;复合固化剂的最优配比为:水泥(A)∶生石灰(B)∶聚丙烯(C)∶矿渣(D)∶高分子吸水树脂(E)=2 000∶400∶10∶1 100∶8。在此基础上,建立了采用不同固化剂掺量下疏浚底泥强度的回归预测模型,为河道灞河河道疏浚底泥再生利用提供依据。
To improve the mechanical properties and the resources utilization of dredged sediment in the Bahe River.On the basis of traditional Portland cement curing,lime,polypropylene,slag and polymer absorbent resin are added to make composite curing agent.The influence of different dosage of curing materials on the strength of dredged sediment with high water content at different ages is analyzed through unconfined compressive strength test,and the correlation between the dosage of curing materials and the strength of dredged sediment is analyzed.The results show that the content of slag and quicklime has a significant effect on the strength of dredged sediments.The cement content has a relatively significant effect on the strength of dredged sediments.The content of polypropylene and polymer absorbent resin has little effect on the strength of dredged sediment.The optimum mix proportion of composite curing agent is:Cement(A)∶quicklime(B)∶polypropylene(C)∶slag(D)∶polymer water absorbent resin(E)= 2 000∶400∶10∶1 100∶8.After that,the regression prediction model of dredged sediment strength with different dosage of curing agent is established based on the stepwise multiple regression method.The research results may provide a basis for the recycling of dredged sediment produced by the ecological environment treatment of the Bahe River in Xi’an.
作者
马学通
高德彬
雷颖
严耿升
MA Xue-tong;GAO De-bin;LEI Ying;YAN Geng-sheng(College of Geological Engineering and Geomatics,Chang’an University,Xi'an 710054,China;Water Cycle and Geological Environment Observation and Research Station for the Chinese Loess Plateau,Zhengning 745399,Gansu Province,China;Power China Northwest Engineering Corporation Limited,Xi'an 710065,China)
出处
《中国农村水利水电》
北大核心
2022年第9期101-105,共5页
China Rural Water and Hydropower
基金
中国电建集团西北勘测设计研究院科技项目“河道底泥处理处置关键技术研究与应用”(XBY-2019-KJ-08)。
关键词
疏浚底泥
高含水率
复合固化剂
无侧限抗压强度
预测模型
dredging sediment
high moisture content
composite curingagent
unconfined compressive strength
prediction model
