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中文摘要：
以CaCO3微粉作改性剂对高铝水泥进行改性.结果表明：CaCO3微粉的填充作用使硬化浆体（hardened cementpaste,HCP）孔径向着小孔方向偏移,平均孔径减小,由于孔结构改善使水泥抗压强度提高.加入的CaCO3微粉与高铝水泥反应生成水化碳铝酸钙,它抑制水化产物中生成介稳相,有效防止高铝水泥后期抗压强度倒缩.对110℃,24 h;300℃,6h和500℃,6h热处理后样品的研究表明：改性后HCP的耐热性能有明显提高.
英文摘要：
Limestone powder was used as a filler to modify high alumina cement. The results show that the effect of limestone powder as a filler makes the pore diameter range of hardened cement pastes deviate to a smaller pore diameter range, and the average pore diameter decreases. Because of the improvement of pore structure, the strength of hardened cement pastes increases. The added limestone powder acts with high alumina cement to produce calcium carboaluminate hydrate, and inhibited the production of metastable phase, which effectively prevents the decline of long-term strength of the hardened cement pastes. The samples atter exposure at 110 ℃ for 24 h, 300 ℃ for 6 h and 500 ℃ for 6 h were tested, and the results show that the heat-resistant property of modified hardened cement pastes is also improved obviously.
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