温度对含碳纤维水泥水化及抗压强度的影响

为了研究温度对含碳纤维水泥水化及其强度的影响,首先将制备好的含碳纤维水泥净浆倒入40mm×40mm×40mm立方体模具中,振密实后分别放入低温(10℃),常温(25℃),高温(100℃)环境下养护至规定龄期(3,7,28d),通过XRD和SEM研究水泥水化过程,对比分析在不同养护温度条件下含碳纤维混凝土的抗压强度。研究结果表明,随着养护温度的增加,C-S-H凝胶和C-H的形成速率增加,从而提高了混凝土的抗压强度;在一定温度范围内提高养护温度,可加速含碳纤维混凝土水化过程。

Influence of temperature on the process of hydration and compressive strength of cement containing carbon fiber

Cement containing carbon fiber can be widely applied in structures such as road, dock and airport surfaces.To explore the influence of temperature on the hydration process and compressive strength of that cement,comparative analysis was carried out through XRD diffraction analysis,combined with SEM observation and the determination of com-pressive strength.At curing temperature for 10 ℃,25 ℃ and 100 ℃ respectively,specimen was prepared with a dimension of 40×40×40 mm prior to curing for a definite time （i.e.3, 7 and 28 days）.Experimental results show that increase of curing temperature,can promote the formation of C-S-H gel and C-H in carbon fiber reinforced cement,thus improve the compressive strength.Appropriately increasing hydration temperature of carbon fiber reinforced cement could accelerate the hydration processes of that cement.