以粉煤灰的火山灰效应、微集料效应分析为基础，分析研究了粉煤灰对混凝土塑性收缩、干缩、自缩和温度收缩裂缝的影响。
Based on analyzing the eruption and tiny aggregate effect of fly ash, the influence of fly ash on the shrinkage fissure of concrete is studied, caused by the plastic deformation, dry or temperature.
室内完成暴露混凝土，黑色染色胶合板门和面板，白色的墙壁和天花板画，天然火山灰。
Interior finishes are exposed concrete, black stained plywood doors and panels, white painted walls and ceilings, natural ash.
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.
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