低温磷酸镁水泥混凝土的力学性能

李茂; 岳燕飞; 钱觉时; 李振; 唐茂华

doi:10.11835/j.issn.2096-6717.2021.133

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低温磷酸镁水泥混凝土的力学性能

土木工程 | 更新时间：2023-03-07

- 低温磷酸镁水泥混凝土的力学性能
- Strength properties of low temperature magnesium phosphate cement concrete
- 土木与环境工程学报 2023年45卷第2期页码：194-202
- 作者机构：
  
  1.甘肃路桥建设集团有限公司公路建设与养护技术、材料及装备交通运输行业研发中心，兰州 730030
  2.重庆大学材料科学与工程学院，重庆 400045
- 作者简介：
  
  李茂(1998- )，男，主要从事磷酸镁水泥基材料研究，E-mail：1070081106@qq.com。
  岳燕飞（通信作者），女，博士，E-mail：yanfei.yue@cqu.edu.cn。
- 基金信息：
  
  公路建设与养护技术、材料及装备交通运输行业研发中心（甘肃路桥建设集团有限公司）开放基金(GLKF201805)
- DOI：10.11835/j.issn.2096-6717.2021.133
  中图分类号： TU528.1
- 收稿：2021-03-02，
  
  纸质出版：2023-04-25
- 稿件说明：
移动端阅览
李茂, 岳燕飞, 钱觉时, 等. 低温磷酸镁水泥混凝土的力学性能[J]. 土木与环境工程学报, 2023,45(2):194-202.

LI Mao, YUE Yanfei, QIAN Jueshi, et al. Strength properties of low temperature magnesium phosphate cement concrete[J]. Journal of Civil and Environmental Engineering, 2023, 45(2): 194-202.
李茂, 岳燕飞, 钱觉时, 等. 低温磷酸镁水泥混凝土的力学性能[J]. 土木与环境工程学报, 2023,45(2):194-202. DOI： 10.11835/j.issn.2096-6717.2021.133.

LI Mao, YUE Yanfei, QIAN Jueshi, et al. Strength properties of low temperature magnesium phosphate cement concrete[J]. Journal of Civil and Environmental Engineering, 2023, 45(2): 194-202. DOI： 10.11835/j.issn.2096-6717.2021.133.

摘要

基于响应曲面法设计试验，研究不同环境温度（0、-20 ℃）下水胶比（

）、集胶比（

）、氧化镁与磷酸盐质量比（

）对磷酸镁水泥（MPC）混凝土抗压强度和抗折强度的影响。使用Design-Expert软件对数据进行分析处理，得到的回归模型反映了3个因素对低温环境下MPC混凝土力学性能的影响规律。3个因素对低温环境下混凝土强度的影响程度为：

，MPC混凝土抗压强度和抗折强度随

的增大而降低。-20 ℃环境下MPC混凝土抗压强度和抗折强度随

的增大而降低，随

的增大而增大；0 ℃环境下抗压强度随

的增大而增大，随

的增大而降低；抗折强度随

的增大而降低，随

的增大而降低。-20 ℃环境温度下MPC混凝土7 d抗压强度和抗折强度在

为0.14、

为5.0、

为2.0时达到最大值。0 ℃环境温度下MPC混凝土7 d抗压强度在

为0.14、

为3.0、

为3.0时达到最大值；7 d抗折强度在

为0.14、

为3.0、

为2.0时达到最大值。模型预测强度值与试验实际强度值之间偏差不超过10%，模型显著性良好。

Abstract

By employing response surface methodology (RSM)

the influence of three factors

i.e. water-binder ratio (

)

aggregate ratio (

) and the mass ratio of magnesium oxide to phosphate (

)

at different temperatures (0， -20 ℃) on the compressive strength and flexural strength of magnesium phosphate cement concrete was investigated. By using Design-Expert software to analyze data

the regression model was obtained

which reflects the influence of three factors on the mechanical properties of MPC concrete at different environmental temperatures. The degree of influence of these three factors on the concrete strength under low temperature was:

. The compressive strength and flexural strength of MPC concrete decreased with the increase of

increased with the increase of

at -20 ℃. The compressive strength increased with the increase of

decreased with the increase of

at 0 ℃; The flexural strength decreased with the increase of

decreased with the increase of

at 0 ℃. The 7 d compressive strength and flexural strength of MPC concrete at -20 ℃ showed its maximum value at

=0.14

=5.0

and

=2.0

whilst the 7 d compressive strength of MPC concrete at 0 ℃ reached its maximum value at

=0.14

=3.0

and

=3.0; the 7 d flexural strength of MPC concrete at 0 ℃ reached its maximum value at

=0.14

=3.0

and

=2.0. The deviation between the predicted strength of the model and the actual value of the test was less than 10%

confirming the good significance of the model established.

关键词

Keywords

references

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