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本文主要通过掺石灰石粉与水泥、粉煤灰、矿渣粉构成四元胶凝材料体系混凝土的抗压强度性能研究,表明石灰石粉取代水泥存在最佳掺量;干缩性能试验揭示了掺加石灰石粉混凝土早期收缩较大,但14d龄期后其收缩值较小,尤其是长龄期总收缩量较小;进一步通过扫描电镜、能谱微观分析,揭示石灰石粉不具有水化活性,存在于混凝土中主要起填充作用。
In this paper, the compressive strength performance of concrete with four-component cementitious material composed of limestone powder, cement, fly ash and slag powder is studied, which shows that limestone powder replaces the cement with the best content. The shrinkage test reveals that the limestone The early shrinkage of the powder concrete is larger, but after 14d, the shrinkage value is small, especially the total shrinkage of the long age is small. By scanning electron microscopy and energy spectrum microanalysis, it reveals that the limestone powder has no hydration activity and exists in The main role of filling in concrete.