Vickers Les, Pan Zhu, Tao Zhong, van Riessen Arie
Geopolymer Research Group, John de Laeter Centre, Curtin University, GPO Box U1987, Perth WA 6845, Australia.
Institute for Infrastructure Engineering, Western Sydney University, Penrith NSW 2751, Australia.
Materials (Basel). 2016 Jun 3;9(6):445. doi: 10.3390/ma9060445.
elevated temperature investigations using fly ash based geopolymers filled with alumina aggregate were undertaken. Compressive strength and short term creep tests were carried out to determine the onset temperature of viscous flow. Fire testing using the standard cellulose curve was performed. Applying a load to the specimen as the temperature increased reduced the temperature at which viscous flow occurred (compared to test methods with no applied stress). Compressive strength increased at the elevated temperature and is attributed to viscous flow and sintering forming a more compact microstructure. The addition of alumina aggregate and reduction of water content reduced the thermal conductivity. This led to the earlier onset and shorter dehydration plateau duration times. However, crack formation was reduced and is attributed to smaller thermal gradients across the fire test specimen.
开展了使用填充有氧化铝集料的粉煤灰基地质聚合物进行的高温研究。进行了抗压强度和短期徐变试验，以确定粘性流动的起始温度。采用标准纤维素曲线进行了耐火测试。随着温度升高对试样施加荷载降低了粘性流动发生时的温度（与无施加应力的测试方法相比）。抗压强度在高温下有所增加，这归因于粘性流动和烧结形成了更致密的微观结构。氧化铝集料的添加和含水量的降低降低了热导率。这导致脱水起始更早且脱水平稳期持续时间更短。然而，裂纹形成减少了，这归因于耐火测试试样上较小的热梯度。
