摘要
利用建筑渣土、再生微粉等固废材料制备低碳肥槽混凝土,以满足各种回填工程的需要。通过测试坍落度、扩展度、泌水率及抗压强度等指标,研究了该材料的工作性能及力学性能变化特征,并建立了基于配合比设计参数的强度预测模型。结果表明,增大水胶比,增大坍落度、扩展度及泌水率,降低强度;配合比设计时,在满足工作性能与力学性能要求前提下,宜优先降低水泥用量,且用于有开挖需求的回填工程,水泥用量不宜超过50 kg/m^(3)。此外,再生微粉可部分取代粉煤灰作为低碳肥槽混凝土的掺合料。
The low-carbon fertilizer trough concrete is prepared by using solid waste materials such as construction slag and recycled micropowder to meet the needs of various backfill projects.By testing slump,expansion,bleeding rate and compressive strength and other indicators,the working properties and mechanical properties of the material were studied,and a strength prediction model based on the de-sign parameters of mix ratio was established.The results show that increasing the water-binder ratio increases the slump,expansion and bleeding rate,and reduces the strength.When designing the mix ratio,under the premise of meeting the requirements of working properties and mechanical properties,the cement dosage should be preferentially reduced,and the amount of cement should be reduced.For backfill projects that require excavation,the amount of cement should not exceed 50 kg/m^(3).In addition,recycled micropowder can partially replace fly ash as an admixture for low-carbon fertilizer trough concrete.
作者
王建刚
曾波
唐飞
王海波
李昱秀
王鸣岐
WANG Jiangang;ZENG Bo;TANG Fei;WANG Haibo;LI Yuxiu;WANG Mingqi(Solid Waste R&D Center,Beijing Urban Green Source Environmental Protection Technology Co.,Ltd.,Beijing 102601,China)
出处
《混凝土》
CAS
北大核心
2024年第4期157-161,165,共6页
Concrete
基金
国家重点研发计划项目(2020YFC1909904)。
关键词
低碳
肥槽混凝土
再生微粉
建筑渣土
工作性能
力学性能
low-carbon
fertilizer trough concrete
recycled micropowder
construction residue
working properties
mechanical properties
