Composition and pozzolanic properties of pulverised fuel ashes. II. Pozzolanic properties of fly ashes, as determined by crushing strength tests on lime mortars†‡
Composition and pozzolanic properties of pulverised fuel ashes. II. Pozzolanic properties of fly ashes, as determined by crushing strength tests on lime mortars†‡
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粉煤灰的成分和火山灰特性，通过石灰砂浆的抗碎强度测试确定。
DOI：
10.1002/jctb.5010151208
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发表时间：
1965
期刊：
影响因子：
--
通讯作者：
J. D. Watt
中科院分区：
文献类型：
--
作者：
D. Thorne;J. D. Watt
通过测定固化 7-730 天的石灰砂浆的抗碎强度，对 14 种具有代表性的英国飞灰的火山灰活性进行了比较。砂浆在达到的抗碎强度和产生这些强度的速率方面存在很大差异。已经研究了抗碎强度与灰烬的碳含量、玻璃含量、二氧化硅和氧化铝含量、密度和比表面积之间的关系，因为这些因素在文献中已被建议作为火山灰活性的参数。对于短期固化，没有发现这些因素与抗碎强度密切相关。最好的相关性是根据颗粒尺寸分析确定的灰烬的比表面给出的。对于长时间固化，灰烬中的 SiO2 或 (SiO2 + Al2O3) 含量给出了最佳相关性。人们发现灰分的活性存在于其硅质颗粒中，并由它们的颗粒尺寸特征决定。这些颗粒的化学成分处于相当窄的范围内，并且发现该范围内的成分差异对活性没有显着影响。
The pozzolanic activities of 14 representative British fly ashes have been compared by determining the crushing strengths of their lime mortars cured for periods of 7–730 days. The mortars differed considerably both in the crushing strengths attained and in the rates at which these strengths were developed. The relations between the crushing strengths and the carbon content, glass content, silica and alumina content, density, and specific surface of the ashes have been examined, as such factors have been suggested in the literature as parameters of pozzolanic activity. For short periods of cure, none of these factors was found to correlate closely with crushing strength; the best correlation was that given by the specific surface of the ashes, as determined from the particle size analysis. For long periods of cure, the best correlation was given by the SiO2 or the (SiO2 + Al2O3) content of the ashes. The activity of an ash was found to reside in its siliceous particles and was determined by their particle size characteristics. The chemical compositions of these particles lay within a fairly narrow range and differences in composition within this range were found to have no significant influence on activity.