This paper expounds mineral composition, physical and chemical characteristics, activity and its evaluation of natural volcanic ash which is used as concrete admixture.
论述了天然火山灰用作混凝土掺合料的矿物组成、物化性能；火山灰活性及其评定。
This paper expounds mineral composition, physical and chemical characteristics, activity and its evaluation of natural volcanic ash which is used as concrete admixture.
论述了天然火山灰用作混凝土掺合料的矿物组成、物化性能；火山灰活性及其评定。
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