外掺MgO在大体积混凝土中的抗裂性研究

Research on Cracking Resistance of Mass Concrete Mixed with MgO

往混凝土中掺加一定量的MgO后,MgO缓慢水化,具有明显的延迟性和膨胀性。与大体积混凝土散热慢,降温收缩变形迟缓的特点相协调,抵消大体积混凝土由于温度降低产生的收缩变形,或对之进行补偿,达到防裂、抗裂的效果。

The delayed and expansive performance of mass concrete mixed with MgO is evident when MgO hydrate. Coordinated with the characteristics of mass concrete such as slowly heat dissipation, deformation of temperature reduction and shrinkage, the delayed and expansive deformation can cancel the shrinkage deformation or compensate it, so the effect of anti-cracking can be reached.