钢渣的膨胀相及其对水泥体积稳定性的影响

借助XRD、DTG和SEM分析了钢渣中石灰相和RO相的结构形态、化学组成和水化条件，并讨论了二者与水泥体积稳定性的关系。分析结果表明：石灰相和RO相与水反应的总体能力偏低，且二者的微晶与水反应的能力有强有弱，具有不均一性；石灰相在沸煮条件下就可以水化，RO相在压蒸条件下才能水化，因此，石灰相是影响水泥的沸煮安定性和压蒸安定性的主要原因，RO相只影响水泥的压蒸安定性，且不是引起水泥压蒸安定性不良的主要原因；钢渣水泥的体积安定性不仅与钢渣中石灰相和RO相的化学组成有关，而且还和钢渣的掺量有关。

By XRD, DTG and SEM, the strucutural morpholopy, the chemical composition and the hydration condition of lime phase and RO phase in steel slag were analyzed, and the relation among lime phase, RO phase and volume stability of cement was discussed. The result showed that the reactivity of both lime phase and RO phase with water was weak, and the reactivity of their microcrystallines with water was indefinite. The lime phase should be hydrated in boiling condition, while the RO phase should be hydrated in autoclaved condition, the lime phase influenced soundness and long-term stability of cement while the RO phase only influenced long-term stability of cement; the soundness and long-term stability of steel slag cement were correlated with the composition of lime phase and RO phase, and the amount of steel slag as well.