矿物掺合料对蒸养水泥净浆性能的影响

研究了蒸养条件下粉煤灰、矿渣的掺量对水泥净浆化学结合水量和抗压强度的影响,揭示了矿物掺合料对蒸养水泥净浆水化性能和力学性能的影响。试验结果表明,与标准养护相比,蒸汽养护更有利于激发粉煤灰和矿渣的火山灰活性,促进水泥的早期水化,提高水泥浆体的早期强度;但无论是蒸汽养护还是标准养护,随着矿物掺合料掺量的增加,复合胶凝材料的水化性能和力学性能明显减弱,因此矿物掺合料掺量不宜太大。

Influence of Mineral Additives on the Characteristics of Steam Curing Hardened Cement Paste

At the steam curing conditions, influence of the volume of fly ash and mineral slag on the chemically combined water content and compressive strength of neat cement paste were studied, the effect of mineral additives on the characteristics of neat cement paste hydration and strength was revealed. The experimental results indicate that￡o compared with standard curing, the steam curing is more beneficial to motivate the pozzolanic activity of fly ash and mineral slag, promote the early hydration of cement and improve the early strength of cement paste; but either the steam curing or the standard curing, the hydration and strength of compounded cement materials became weakened obviously along with the increase of mineral additives content, so it is inadvisable to oversize the content of the mineral additives.