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11.
周双喜 《上海大学学报(英文版)》2009,13(4):322-326
Two kinds of activated ways are used to prepare activated coal gangue fine powder, one is calcining coal gangue
at 800 ℃ (gangue A), and the other is calcining coal gangue with a certain calcite at 800 ℃ (gangue B). The experiment
shows that strengths of blended cement mortar with coal gangue B are higher than that of blended cement with coal gangue
A. Hydration of cements with the two kinds of activated coal gangue is investigated through a differential thermal analysis.
The weight loss due to Ca(OH)2 decomposition of hydration products by differential thermal analysis/thermo gravimetric
(DTA/TG) can be used to quantify the pozzolanic reaction. A new method based on the composition of hydration cement is
proposed to determine the degree of pozzolanic reaction. The results obtained suggest that the degree of pozzolanic reaction
of gangue B is faster than that of gangue A. 相似文献
at 800 ℃ (gangue A), and the other is calcining coal gangue with a certain calcite at 800 ℃ (gangue B). The experiment
shows that strengths of blended cement mortar with coal gangue B are higher than that of blended cement with coal gangue
A. Hydration of cements with the two kinds of activated coal gangue is investigated through a differential thermal analysis.
The weight loss due to Ca(OH)2 decomposition of hydration products by differential thermal analysis/thermo gravimetric
(DTA/TG) can be used to quantify the pozzolanic reaction. A new method based on the composition of hydration cement is
proposed to determine the degree of pozzolanic reaction. The results obtained suggest that the degree of pozzolanic reaction
of gangue B is faster than that of gangue A. 相似文献
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祖远 《第二课堂(小学)》2009,(11)
在意大利西西里岛东北部的埃特纳火山脚下,有一个小镇,镇上住着一个叫乔治·加尔都钦的年轻人。加尔都钦看上去和普通人一样,他既不会什么巫术,也不懂什么仙道,但他却有一种特殊的本领,靠他那具有独特感受力的脚趾未卜先知,预报地震及火山爆发。1980年的一个深夜,镇上万籁俱寂,突然,睡梦中的加尔都钦猛 相似文献
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粉煤灰是从燃煤粉电厂的锅炉烟气中收集到的细粉末,是一种具有潜在活性的火山灰掺和料,舍有大量玻璃体,这种玻璃体主要由具有化学活性的SiO2和Al2O3组成.从外观看,其颗粒呈球型,表面光滑.在施工中适当掺入粉煤灰,可以改善混凝土性能,达到预期效果. 相似文献
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颜士州 《青少年科技博览(中学版)》2014,(10):21-22
火山留下的万烟谷 阿拉斯加半岛上有座卡特迈火山,1912年曾经大爆发,爆炸声在1200千米以外都听得见。相距约90千米的科迪亚克岛上落了两天两夜的火山灰,地面被火山灰盖得很厚,牛羊没有草吃,连山上的熊也找不到东西吃了,竞跑下山来,捕食人们饲养的牲畜。 相似文献