石灰—抛光砖粉结合料的性能研究

以工业废弃物陶瓷抛光砖粉作为一种新型公路工程无机结合料,将之与粉煤灰进行对比,测试了2种结合料的强度和水稳定性,采用XRD、SEM等手段分析其水化产物及微观形貌。结果表明:在相同配比条件下,石灰—抛光砖粉结合料与石灰—粉煤灰结合料相比,前者的早期抗压强度略有提高,28 d抗压强度增幅明显,平均增幅达190%,最大增幅高达210%;前者的7 d、28 d软化系数均高于后者,具有更好的水稳定性。SEM测试进一步说明,石灰—抛光砖粉结合料生成的水化产物更多,结构更致密,在结构与性能上优于石灰—粉煤灰结合料。

Study on the Performance of Lime-polishing Powder Binder

Using industrial waste ceramical polishing powder as a new kind of inorganic binder for road engineering,effect of it on road performance and mechanism analysis were presented according to compare to fly ash..Water stability and strength of two binders were measured.Hydration product and microcosmic graph were tested by XRD and SEM.Results show that strength curing 7days of lime-polishing powder binder is slightly higher than lime-fly ash binder,but amplitude of strength curing 28 days is obvious comparing to fly ash-lime binder,average amplitude is up to 190% and maximal amplitude is up to 210%,intenerate index and water stability of lime-polishing powder binder exceed lime-fly ash.binder.Microstructure analysis of the two binders indicated that lime-polishing powder binder is beneficial structure and performance compared to lime-fly ash binder,it produced more amount of hydration product and microstructure of it is more compact.