MECHANICAL PROPERTIES OF HIGH PERFORMANCE CONCRETE MADE WITH HIGH CALCIUM HIGH SULFATE FLY ASH

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• 作者：Yamei ; Zhang ; Wei ; Sun ; Lianfei ; Shang
• 刊名：Cement and Concrete Research
• 出版年：1997
• 期刊代码：12_00088846
• 类别：ms
• 出版时间：July, 1997
• 卷：27
• 期：7
• 页码：1093-1098
• 文件大小：382 K

摘要

A high calcium fly ash with high SO₃ content was used to produce high performance concrete. In all the mixes, the fly ash contents of 50%and 60%by weight were applied. Although fly ash cement pastes showed severe volume unstability and poor pore structure development, mortars and concretes incorporating high mass high calcium fly ash exhibited good performance in both fresh and hardened state as those with low calcium fly ash did. The 3d and 28d compressive strength of mortars reached 25.2 42.2MPa respectively with the water binder ratio varying from 0.30 to 0.24. What is noticeable is that all the mortars and concretes showed good strength developing tendency with the 90d compressive strength up to 67.3 85.5MPa. This investigation reveals once more the fact that some materials which are not up to standard can still play a special role so long as the components are carefully chosen and proportions properly designed. © 1997 Elsevier Science Ltd