Early strength development and hydration of alkali-activated blast furnace slag/fly ash blends
Early strength development and hydration of alkali-activated blast furnace slag/fly ash blends
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DOI：
10.1680/adcr.1999.11.4.189
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发表时间：
1999-10
影响因子：
2
通讯作者：
C. Shi;R. Day
中科院分区：
文献类型：
--
作者：
C. Shi;R. Day
本文研究了两种粉煤灰和石灰的掺入对由50%粉煤灰和50%矿渣组成的氢氧化钠和硅酸钠活性矿渣/粉煤灰混合料的强度发展和水化的影响。与100%矿渣水泥的性能进行了比较。当使用NaOH作为活化剂时，用ASTM F型粉煤灰替代矿渣对强度发展和水化均无显著影响；C型粉煤灰不影响强度发展，但由于粉煤灰中C3A的存在，影响了水化过程。以Na2SiO3为活化剂时，两种粉煤灰的水化和强度发展均有显著影响。少量水合石灰的加入显著提高了活性渣/粉煤灰共混物的早期强度，但略微降低了其后期强度。水化过程中热演化的测量表明，水化石灰的加入对水化过程有轻微的影响。
This study concerns the effect of two types of fly ash and the addition of lime on the strength development and hydration of sodium hydroxide- and sodium silicate-activated slag/fly ash blends which consisted of 50% fly ash and 50% slag by mass. Performance was compared to that of 100% slag cements. When NaOH was used as an activator, the slag replacement with ASTM Type F fly ash did not show a significant effect on either the strength development or hydration; Type C fly ash did not affect the strength development, but affected the hydration process due to the presence of C3A in the fly ash. Both fly ashes had a significant effect on the hydration and strength development when Na2SiO3 was used as an activator. The addition of a small amount of hydrated lime significantly increased the early-age strength but slightly decreased the later-age strength of the activated slag/fly ash blends. Measurement of the heat evolution during hydration indicated that the addition of the hydrated lime had a slight effect ...