基于RSM模型研究锂渣对UHPC砂浆流动性能和力学性能的影响  

Influence of lithium slag on flow and mechanical properties of UHPC mortar based on RSM

作　　者：毛意中 黄珊[2] 黄少文[3] 林俊 徐滨 邓会鹏 MAO Yizhong;HUANG Shan;HUANG Shaowen;LIN Jun;XU Bin;DENG Huipeng(College of Civil Engineering,Hunan University,Changsha 410000,China;School of Resources and Environment,Nanchang University,Nanchang 330031,China;School of Physics and Materials Science,Nanchang University,Nanchang 330031,China;Jiangxi Highway Engineering Testing Center,Nanchang 330009,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410000 [2]南昌大学资源与环境学院,江西南昌330031 [3]南昌大学物理与材料学院,江西南昌330031 [4]江西省公路工程检测中心,江西南昌330009

出　　处：《混凝土》2023年第12期196-201,共6页Concrete

基　　金：国家自然科学基金(21466023);江西省博士后基金(2016KY13);江西省教育厅科学技术研究项目(60011)。

摘　　要：为研究锂渣对超高性能混凝土(UHPC)流动性和力学性能的影响,基于响应曲面方法(RSM)设计理论,通过Box-Behnken模型设计了15组试验。将水胶比、锂渣、硅灰作为因子,以流动度和抗压强度为响应。研究了锂渣、水胶比、硅灰等因素以及因素之间交互作用对UHPC砂浆流动性能与力学性能的影响。研究表明,RSM可准确预测锂渣对UHPC性能的影响,流动度响应模型、抗压强度响应模型预测度分别为98.59%、98.58%;锂渣与水胶比、硅灰均存在一定的交互作用,经过验证,基于RSM模型设计的UHPC砂浆流动性能和力学性能与目标值误差小于5%。To investigate the effect of lithium slag on the flow and mechanical properties of ultra-high performance concrete(UHPC),this work was based on the response surface model(RSM)design theory,and 15 sets of tests were designed by the Box-Behnken model.Using water-cement ratio,lithium slag,and silica fume as factors,with the flow and compressive strength as responses.The effects of factors such as lithium slag,water-cement ratio,silica fume,and the interaction between factors on the flow properties and mechanical properties of UHPC mortar were investigated.Study shows that RSMcan accurately predict the effect of lithium slag on UHPC performance.The predictions of the fluidity response model and compressive strength response models were 98.59%and 98.58%.Lithium slag has some interaction with the water-colloid ratio and silica fume.It was verified that the error of flow properties and mechanical properties of UHPC mortar designed based on the RSM model was less than 5%.

关 键 词：响应曲面方法 超高性能混凝土 锂渣 流动性能和力学性能 

分 类 号：TU528.01[建筑科学—建筑技术科学]