环保型矿渣结合料NSB及其稳定土的抗裂性能

Environmental Protection Slag Binder NSB and It's Anti-cracking Performance of Stabilized Soil

以尽可能多的利用钢铁厂排放的工业废渣——粒化高炉矿渣为出发点,以抗压强度、凝结时间、抗裂性为技术性能指标,研制出抗裂性能优良的新型路面基层结合料NSB。对NSB材料的抗裂性及其影响因素进行了分析,得出在论文的材料研究范围内,水泥掺量、比表面积的大小对NSB的抗裂性有积极作用的结论,同时发现矿渣微粉中石灰石的最佳掺量为2%。用2种NSB分别稳定西安黄土与级配集料后发现,NSB稳定细粒土与级配碎石都要优于同条件下P.O32.5R稳定土的抗裂性。研究结果表明,矿渣基水泥结合料NSB是优质的路面基层结合料,不仅性能优良,更具有重要的环保节能意义。

Making full use of industrial waste residue-granulated blast furnace slag（GBFS） of steel plant emissions as the starting point and using compressive strength,setting time,the crack resistance as the technical performance index,the experiments have developed a kind of good pavement base course binder NSB with better anti-cracking performance than P.O32.5R.Crack resistance of NSB and its influencing factors were analyzed with the testing within the scope of paper study material,the cement dosage,the size of NSB specific surface area have a positive effect on NSB＇s Crack resistance,and the optimal dosage of limestone has been also found is 2%.Crack resistance of NSB stabilized fine-grained soil and stabilized grade aggregate from Xi＇an is better than P.O32.5R＇s,which have been proved in systematic respective comparative research.Research results show that NSBs are high quality base course binder,not only with excellent road performance,more important with environmental protection and energy saving merit.