环境温度对超高韧性地聚合物复合材料抗冲击性能的影响

Effect of environmental temperature on the impact resistance of ultra-high toughness geopolymer composites

研究了不同NaOH溶液浓度(8、10、12、14 mol/L)的超高韧性地聚合物复合材料(UHTGC)在常温(20℃)、高温(50、100、200℃)、低温(-20、-40、-60℃)环境下的抗冲击性能。结果表明:在常温环境下,随着NaOH溶液浓度的增大,UHTGC试件的抗冲击性能呈先增后降的趋势,最佳NaOH溶液浓度为12 mol/L;在高温环境下,随着NaOH溶液浓度的增大,UHTGC试件的抗冲击性能不断提高,当NaOH溶液浓度为14 mol/L时,UHTGC试件的峰值冲击荷载和冲击耗能均相对最大;在低温环境下,随着NaOH溶液浓度的增大,UHTGC试件的峰值冲击荷载呈先增后降的趋势,冲击耗能呈增大趋势,另外,随着低温温度的降低,UHTGC试件的冲击耗能逐渐增大。

The impact resistance of ultra-high toughness geopolymer composites(UHTGC)with different concentrations(8,10,12,14 mol/L)of NaOH solution at room temperature(20℃),high temperature(50,100,200℃),and low temperature(-20,-40,-60℃)environments was investigated.The results show that,at room temperature environment,with the increase of the concentration of NaOH solution,the impact resistance of UHTGC specimens shows a tendency of first increasing and then decreasing,and the optimal concentration of NaOH solution is 12 mol/L.At high temperature environment,with the increase of the concentration of NaOH solution,the impact resistance of UHTGC specimens is improved,and when the concentration of NaOH solution is 14 mol/L,the peak impact load and impact energy consumption of UHTGC specimens are relatively largest.At low temperature environment,with the increase of the concentration of NaOH solution,the peak impact load of UHTGC specimen shows a tendency of first increasing and then decreasing,and the impact energy consumption of UHTGC specimen shows a tendency of increasing.In addition,with the decrease of the low temperature,the impact energy consumption of UHTGC specimen increase gradually.