本文主要介绍玻璃纤维增强低碱度水泥的耐久性的研究情况。这种玻璃纤维增强水泥的耐久性远优于玻璃纤维增强硅酸盐水泥。例如,埋入硅酸盐水泥中的耐碱玻璃纤维,在湿热条件(50℃,100％R.H.)下养护,50天左右其荷载能力即消失,而埋入低碱度水泥(J型)中的耐碱玻璃纤维,在同样条件下养护,到360天时,其荷载能力还保留95.2％,而且在180天后已趋于稳定。 This article mainly introduces the research of the durability of glass fiber reinforced low alkalinity cement. This glass fiber reinforced cement is far more durable than glass fiber reinforced Portland cement. For example, alkali-resistant glass fibers embedded in portland cement are cured under hot and humid conditions (50°C, 100% RH), their load capacity disappears in about 50 days, and they are buried in low-alkalinity cement (J type). Alkali-resistant glass fibers, cured under the same conditions, have a load capacity of 95.2% at 360 days, and have stabilized after 180 days.