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粉煤灰空心微珠的开发与应用 总被引:2,自引:0,他引:2
苑金生 《保温材料与节能技术》2000,(6):5-6,8
粉煤灰空心微珠是从热电厂粉煤灰中分选出的空心粉状材料。本文介绍国内外对利用粉煤灰空心微珠方面进行的试验研究,供开发应用参考。 相似文献
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本文介绍了采用70%的粉煤灰微珠为主要原料,以结合粘土、锯木屑和矾土熟料为辅助原料,加入结合剂,经高温烧结制成体积密度为0.8级的微珠轻质隔热砖。为大量利用粉煤灰开劈一条新途径。 相似文献
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粉煤灰对玻化微珠保温砂浆性能的影响 总被引:2,自引:0,他引:2
利用轻质骨料-玻化微珠,制备出玻化微珠保温砂浆,研究了粉煤灰对其流动度、湿表观密度、干表观密度、抗压强度、导热系数、吸水率的影响规律,并与普通砂浆进行了比较。结果表明,玻化微珠保温砂浆的流动度和导热系数先增大后降低,而湿表观密度、干表观密度、抗压强度和体积吸水率均先降低后增大;且本实验条件下,粉煤灰掺量在10%左右时,玻化微珠保温砂浆较普通砂浆好的性能要好。 相似文献
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高钙粉煤灰的综合利用 总被引:1,自引:0,他引:1
随着时间的推移,社会科技的发展,当前对粉煤灰的综合利用,越来越受到重视。众所周知,粉煤灰是一种人工火山质材料,发电厂由于燃烧的煤源不同,所以各自产生的灰渣的化学成份也有所区别,一般而言有以下两种:一种是烟煤、无烟煤作燃料烧成的粉煤灰,其氧化钙的含量小于10%,被称之为低钙粉煤灰;另一种是采用褐煤作燃料,上海最典型用的内蒙古东胜 相似文献
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粉煤灰漂珠的纳米结构及其传热机理研究 总被引:3,自引:0,他引:3
研究粉煤灰漂珠的矿物组成、化学成分及其纳米结构,并对其传热机理进行探讨。表明其在超低温和高温下都表现出较低的导热系数,是制作优异保温材料的原材料。 相似文献
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《Construction and Building Materials》2006,20(9):744-753
Carbonation of fly ash concrete is studied by using two types of fly ash with different CaO contents. It is observed that under natural exposure environments, the carbonation rate is the highest when specimens are exposed in the city. The decreased ratio of water to binder and fly ash content leads to a better carbonation resistance. For the same fly ash content, specimens of high-CaO fly ash show a better carbonation resistance than those of low CaO fly ash. However, when compared at an equal strength, the effect of the type of fly ash on carbonation becomes insignificant. When comparing the carbonation results of concrete and mortar specimens, results of mortar show similar trends as those of concrete. However, the test results on mortar are worse by the use of fly ash than those of concrete. In addition, the carbonation tests in an accelerated environment are also conducted. It is found that there exist strong relations between carbonation depths of concrete exposed in natural and in accelerated environments. A mathematical approach to predict the carbonation depth in the natural environments is proposed based on the accelerated tests and the square-root-t-law. 相似文献
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