材料掺量对不同龄期碱激发粉煤灰混凝土抗压强度的分析
Analysis of the effect of material dosages on the compressive strength of alkali activated fly ash concrete at different ages
邵善庆 1龚爱民 1王冉 1罗加辉 1雍康 1黄逸尔 1金镯1
作者信息
- 1. 云南农业大学水利学院,昆明 650201
- 折叠
摘要
为提高碱激发粉煤灰混凝土的工程实际应用,基于不同碱激发剂(生石灰粉)掺量(5%、8%、10%)和不同粉煤灰掺量(10%、15%、25%)的碱激发粉煤灰混凝土,对不同龄期(7、28、56 d)的碱激发粉煤灰混凝土抗压强度变化规律进行研究.结果表明,在生石灰粉掺量不变的条件下,随着粉煤灰掺量的增加,碱激发粉煤灰混凝土的7d抗压强度呈逐渐下降的趋势;在28d和56d龄期时,粉煤灰掺量为15%时碱激发粉煤灰抗压强度达到最大.在粉煤灰掺量不变的条件下,当生石灰粉掺量从5%增加到8%时,各龄期的碱激发粉煤灰混凝土抗压强度均增加;当生石灰粉掺量从8%增加到10%时,各龄期的碱激发粉煤灰混凝土抗压强度均降低.
Abstract
In order to improve the practical application of alkali-activated fly ash concrete in engineering,the variation law of com-pressive strength of alkali activated fly ash concrete at different ages(7、28、56 d)was studied based on different dosages of alkali acti-vator(quicklime powder)(5%、8%、10%)and fly ash(10%、15%、25%).The results showed that under the condition of constant con-tent of quicklime powder,the 7-day compressive strength of alkali-activated fly ash concrete gradually decreased with the increase of fly ash content;at the ages of 28 and 56 days,the compressive strength of alkali-activated fly ash reached its maximum when the fly ash content was 15%.Under the condition of constant fly ash content,when the content of quicklime powder increased from 5%to 8%,the compressive strength of alkali-activated fly ash concrete at all ages increased;when the content of quicklime powder in-creased from 8%to 10%,the compressive strength of alkali activated fly ash concrete at all ages decreased.
关键词
材料掺量/龄期/碱激发/生石灰粉/粉煤灰/混凝土/抗压强度Key words
material dosages/age/alkali activation/quicklime powder/fly ash/concrete/compressive strength引用本文复制引用
出版年
2024
NETL
NSTL
万方数据