摘要
粉煤灰特别是Ⅰ级灰对高贝利特水泥的流动性有明显改善作用。在常温下,高贝利特水泥胶砂和混凝土强度随粉煤灰掺量增加而下降。但在高温条件(38℃)下,高贝利特水泥在粉煤灰各掺量下,其各龄期强度增幅均超过硅酸盐水泥,28d时掺粉煤灰的高贝利特水泥强度已达到或超过同粉煤灰掺量的硅酸盐水泥。掺Ⅰ级灰的高贝利特水泥90d强度可与纯高贝利特水泥持平,Ⅱ级灰对高贝利特水泥强度影响较大。粉煤灰可进一步降低高贝利特水泥本已较低的水化热。
Fly ash especially class I fly ash exe rts remarkable effect on improving t he flowability of high belite cement .At nor-mal temperature the strength of high belite cement and concrete decrease s with the addition of fly ash,while a t elevated tempera-ture as 38℃,the ratio in strength gain for high belite cement at various ages and under varying addition of fly a sh surpasses that of Portland cement,and the 28d stren gth of high belite cement with fly ash is equivalent to or high than that of t he Portland ce-ment with the same addition of fly ash.The 90d strength of high belite ceme nt with class I fly ash is equivalent t o that of the high belite cement without fly ash.C lass II fly ash has marked effect on th e strength of high belite cement.The addition of fly ash can further reduce the hydration heat of high belite cement.
出处
《水泥》
CAS
2002年第3期1-4,共4页
Cement
