将粉煤灰和矿渣加入普通硅酸盐水泥中，制备了自愈合水泥浆体系，并对其抗压强度、自愈合性能进行了测试。结果表明，固化24 h后水泥石的抗压强度随粉煤灰、矿渣以及粉煤灰矿渣复合加量的增加而降低。水泥石产生裂缝后愈合28 d，CB、CFSL_35%水泥浆体系断裂渗透率分别降低6.8%、60.3%，CB水泥浆体系微裂缝宽度仅减少0.008 mm，CFSL_35%水泥浆体系的表面微裂缝已实现愈合。水泥石的微观结构表明，粉煤灰和高炉矿渣进一步水化产生C-S-H凝胶使水泥石微裂缝愈合。

Fly ash and slag are added into ordinary portland cement to prepare a self-healing cement slurry system,and its compressive strength and self-healing properties are tested.Results show that the compressive strength of the cement stone after curing for 24 h decreases with the increasing addition amount of fly ash,slag and fly ash slag compound.After the cement stones are cracked,it spends 28 d for them to self-heal.It is found after 28 days that the fracture permeabilities of the CB and CFSL 35% cement slurry systems are reduced by 6.8% and 60.3%,respectively;the microcrack width of the CB cement slurry system is only narrowed by 0.008 mm while the surface microcracks of the CFSL 35% cement slurry system have been healed.The microstructure of cement stone explains that further hydration of fly ash and blast furnace slag produces C-S-H gel to heal microcracks of cement stone.

赵军(1979-),男,本科,高级工程师,主要从事油气井固井技术研究工作