| 摘要: |
| 为了对影响水下不分散混凝土施工质量最关键的3个技术指标（絮凝性、流动性和水陆强度比）进行优化设计以及预测，在试验数据的基础上，采用因子设计法对其进行了优化计算和建模.试验设计了3个因子：水胶比（mW/mB）为0.35~0.45，絮凝剂（AWA）用量为0.20%~1.50%，减水剂（PC）用量为1.20%~1.80%.结果表明：水下不分散混凝土最佳水灰比、AWA用量和PC用量分别为0.39、0.86%、1.47%，预测水下不分散混凝土对应的扩展度为184.0 mm，悬浊物含量为113.2 mg/L，水陆强度比为77.4%. |
| 关键词: 水下不分散混凝土 因子设计 絮凝性 水陆强度比 流动性 误差分析 |
| DOI：10.3969/j.issn.1007-9629.2022.05.010 |
| 分类号:TU528.01 |
| 基金项目:国家自然科学基金资助项目（51778378） |
|
| Optimization and Prediction for Anti-washout Ability of Underwater Concrete Based on Factorial Design |
|
ZHANG Ying1, SUN Guowen1,2, ZHANG Guoqiang3, WANG Caihui1,2, WANG Yaqian1
|
|
1.School of Materials Science and Engineering， Shijiazhuang Tiedao University， Shijiazhuang 050043， China;2.Hebei Key Laboratory of Advanced Materials for Transportation Engineering and Environment， Shijiazhuang 050043， China;3.Foundational Subjects Department， Shijiazhuang Tiedao University Si Fang College，Shijiazhuang 051132， China
|
| Abstract: |
| In order to optimize the design and forecast of the three most critical technical indicators that affect the quality of underwater concrete construction： anti-washout， slump and underwater/in-air strength ratio. Based on the experimental data， the factorial design method was used to optimize calculation and modeling. In the experiment， the water-binder ratio（mW/mB） was from 0.35 to 0.45， and the amount of anti-washout admixture（wAWA） was 0.20%~1.50%， the amount of superplasticizer（wPC） was from 1.20% to 1.80%. The results show that underwater concrete has excellent properties. The best values of mW/mB， wAWA and wPC are 0.39， 0.86% and 1.47%， respectively. The theoretical prediction is that the corresponding slump of underwater concrete is 184.0 mm and the suspension content is 113.2 mg/L， the underwater/in-air strength ratio is 77.4%. |
| Key words: underwater concrete factorial design anti-washout underwater/in-air strength ratio slump error analysis |
