文档介绍：无机非金属材料专业毕业论文36
摘要
砂浆是建筑工程中用途较广的一种材料而粉煤灰是工业废渣之一本文就水泥砂浆中掺入不同掺量的粉煤灰后其强度改变情况进行研究粉煤灰作为掺合料直接用于砂浆中能改善砂浆的强度指标及其他性能节约原材料利用粉煤灰降低砂浆成本减少环境污染既有经济价值又有社会效益为了研究粉煤灰掺量对砂浆强度的影响采用04507两种不同的水胶比分别以0102030和40的粉煤灰掺量配制砂浆测定流动度后在不同龄期进行强度对比试验
结果表明当水胶比一定时随粉煤灰掺量的增加对砂浆的流动性起到一定的改善作用掺粉煤灰的水泥砂浆的早期强度会随着粉煤灰掺量的增加而降低但其后期强度随着龄期的增长会逐渐提高并超过未掺粉煤灰的砂浆强度在本文的试验条件中得到粉煤灰砂浆获得最大强度对应的粉煤灰掺量在30左右
关键词砂浆粉煤灰强度龄期
ABSTRACT
Mortar is an building engineering wider using a kind of material and fly ash is one of industrial waste the cement mortar with different proportion of fly ash on the strength of the change Fly ash as admixtures directly for mortar can improve the strength of the mortar index and other properties save raw materials by using fly ash reduce mortar costs reduce the pollution of the environment Both economic value and social benefits In order to research the fly ash content effect on the strength of mortar use 045 07 two different water-binder ratio respectively by 0 10 20 30 and 40 of the fly ash content preparation mortar determine the fluidity strength in different age contrast test
The result shows when water-binder ratio must be with the increase of the fly ash content the liquidity of mortar plays a certain role to improve The mixed fly ash cement mortar early strength of will with the fly ash content and reduce the increase but the post strength with the growth of the age will gradually improve and more than those of the mineral coal fly ash mortar strength In this paper the experimental conditions get imum intensity corresponding for fly ash mortar of the fly ash content at about 30
Key words
1 绪论
11 前言
我国是个产煤大国电力工业目前80的发电量仍由燃煤产生一般平均每发电1万千瓦每小时排灰约1万吨近年来我国的能源工业稳步发展发电能力年增长率为 73电力工业的迅速发展带来了粉煤灰排放量的急剧增加燃煤热电厂每年所排放的粉煤灰总量逐年增加到2010年达到近4亿吨当前随着全国性的电能紧缺燃煤电厂仍在大量的建设中仅山西近几年新扩建燃煤电厂的总装机容量将达到1000 万千瓦可以肯定随着我国发电量增加粉煤灰的产量和贮存量必将进一步增大粉煤灰大量的排放和堆存增加了电力建设的投资增大了电力生产的成本占用大量的土地加重了对环境的污染不仅严重制约了我国电力工业本身的发展而且也影响到国民经济的可持续增长给我国的国民经济建设及生态环境造成巨大的压力因此粉煤灰的充分利用是一项紧迫而又长期的任务[1]粉煤灰又称飞灰火力发电厂燃煤锅炉随烟气排出的细颗粒废渣以SiO2和Al2O3为主要化学成分含有少量CaO