The present study investigated the resistance of concrete blended with ground granulated blast furnace slag (GGBS) and ferronickel slag (FNS) to cycles of freeze and thaw. The replacement ratio of the binders was 0%, 50 wt% of GGBS and 30 wt% of GGBS + 20 wt% of FNS for O100, OG50 and OG30F20, respectively. Specimens consisted of cement paste and concrete kept at 0.45 water/binder ratio. After 28 days of curing, specimens were subjected to freeze and thaw cycles (300) for measuring the variation of strength, weight loss and fundamental transverse frequency. Simultaneously mercury intrusion porosimetry was performed to examine the pore structure modifications at 28 days. The hydration products for cement paste cured at each determined age were characterized by X-ray diffraction and the content of CH and CSH was obtained from thermogravimetric analysis (TGA). As a result, the ternary blended concrete specimens showed lower deterioration degree when subjected to the freeze and thaw cycles. This may be due to a latent hydraulic and/or pozzolanic reaction producing more CSH in the matrix, which in turn increases the volume of small pores. The increased content of C–S–H gel for OG30F20 was confirmed by TGA, accounting for 69.9%. However, the binder system consisting of ordinary Portland cement and GGBS did not exhibit higher resistance to the given deleterious environment, presumably due to a delayed hydration process.

本研究研究了掺有颗粒状高炉矿渣（GGBS）和镍铁矿渣（FNS）的混凝土对冻融循环的抵抗力。对于O100，OG50和OG30F20，粘合剂的替代率分别为0％，50wt％的GGBS和30wt％的GGBS + 20wt％的FNS。标本由水泥浆和混凝土组成，水灰比保持在0.45。固化28天后，将样品进行冷冻和解冻循环（300），以测量强度，重量损失和基本横向频率的变化。同时进行压汞法测定28天时的孔隙结构变化。通过X射线衍射表征在每个确定的年龄固化的水泥浆的水合产物，并且通过热重分析（TGA）获得CH和CSH的含量。结果，三元混合混凝土试样在经受冻融循环时表现出较低的劣化度。这可能是由于潜在的水力和/或火山灰反应在基质中产生更多的CSH，这反过来又增加了小孔的数量。TGA证实OG30F20的C–S–H凝胶含量增加，占69.9％。但是，由普通波特兰水泥和GGBS组成的粘合剂体系对给定的有害环境没有表现出更高的抵抗力，这可能是由于延迟了水合过程所致。三元混合混凝土试样在冻融循环中表现出较低的劣化度。这可能是由于潜在的水力和/或火山灰反应在基质中产生了更多的CSH，这反过来又增加了小孔的数量。TGA证实OG30F20的C–S–H凝胶含量增加，占69.9％。但是，由普通波特兰水泥和GGBS组成的粘合剂体系对给定的有害环境没有表现出更高的抵抗力，这可能是由于延迟了水合过程所致。三元混合混凝土试样在冻融循环中表现出较低的劣化度。这可能是由于潜在的水力和/或火山灰反应在基质中产生更多的CSH，这反过来又增加了小孔的数量。TGA证实OG30F20的C–S–H凝胶含量增加，占69.9％。但是，由普通波特兰水泥和GGBS组成的粘合剂体系对给定的有害环境没有表现出更高的抵抗力，这可能是由于延迟了水合过程所致。