为提高牺牲阳极-导电砂浆阴极保护系统中导电砂浆的导电性，通过在导电砂浆中掺加溴化锂对其进行改性，研究了导电砂浆电阻率与溴化锂掺量及养护龄期的关系，并通过飞溅区腐蚀模拟试验对该牺牲阳极-导电砂浆阴极保护系统的腐蚀防护效果进行了验证。结果表明：溴化锂能显著降低导电砂浆的电阻率，随溴化锂掺量的增加，导电砂浆电阻率降低；用溴化锂145.4 g、水泥450 g、砂子1 350 g、水270 g配合比制备的高溴化锂掺量导电砂浆，其导电性几乎不受养护龄期影响，且电阻率均小于100 Ω·cm；该牺牲阳极-导电砂浆阴极保护系统能够为飞溅区钢结构提供全面的防护。

In order to improve the conductivity of conductive mortar in sacrificial anode and conductive mortar cathodic protection system, the conductive mortar was modified by adding lithium bromide. The relationships between resistivity of conductive mortar and dosage of lithium bromide, curing age were studied. And the corrosion protection effect of the sacrificial anode and conductive mortar cathodic protection system was verified through corrosion simulation test in splash area. The results show that lithium bromide significantly reduced the resistivity of conductive mortar, and the resistivity decreased with the increase of lithium bromide dosage. Curing age had almost no effect on the conductivity of the conductive mortar with high lithium bromide dosage prepared at the mixing ratio of 145.4 g lithium bromide, 450 g cement, 1 350 g sand, and 270 g water, and corresponding resistivity was all less than 100 Ω·cm. The steel pipe pile in splash could be well protected by this sacrificial anode and conductive mortar cathodic protection system.