纳米TiN对粉煤灰水泥性能的影响

Effect of Nano-TiN on the Performance of Fly Ash Cement

本文研究了纳米TiN对于粉煤灰水泥(粉煤灰掺量为40%)力学性能的影响,并结合XRD、TG-DTA、SEM和水化热等测试手段进行了分析。研究结果表明,纳米TiN在粉煤灰水泥中最佳掺量为1%,与空白组相比,1 d、3 d、7 d、28 d的抗压强度分别增加了27. 1%、23. 3%、37. 9%和21. 0%。通过XRD和TG-DTA等微观测试发现添加纳米TiN不会生成新的水化产物;通过SEM观察水泥水化微观结构,发现纳米TiN的加入能够生成更多的水化产物,在一定程度上促进水泥结构致密化;水化热测试结果表明添加适量的纳米TiN能够加快水化速率,使水泥水化第二放热峰提前,随着纳米TiN掺量的增加其水泥水化放热总量逐渐增加。

The effect of nano-TiN on the mechanical properties of fly ash cement(40%fly ash)is studied through the XRD,TG-DTA,SEM and hydration heat and other test methods in this paper.The results show that the optimum dosage of nano-TiN in fly ash cement is 1%.Compared with the blank group,the compressive strength of 1 d,3 d,7 d and 28 d increased by 27.1%,23.3%,37.9%and 21.0%respectively.Nano TiN does not promote the formation of new substances by using XRD and TG-DTA.It was found that the addition of nano-TiN could produce more hydration products and promote the densification of cement structure to a certain extent through SEM observation.At the same time,adding appropriate amount of nano-TiN can accelerate the hydration rate and promote the second exothermic peak of cement hydration ahead of time.And with the increase of nano-TiN content,the total amount of cement hydration exothermic gradually increases.