calcareous tuff

用法例句

Structure of zeolite cannot be destroyed by alkalinity in portland cement paste at normal temperature, pozzolanic activity of zeolite_tuff is from amorphous SiO 2 and Al 2O 3 therein.

用化学的、物理的和物化的方法证明 ,沸石凝灰岩中的沸石是热力学稳定的物质 ,硅酸盐水泥中碱度在常温下不足以破坏沸石的结构。

Based on the natural gamma log curves of acid tuff and clay rocks of acid volcanic events,the author here queries the arguments that radioactive intensity of sedimentary strata will grow with the increasing argillaceous materials and that the natural gamma value and the empirical equation can be used to calculate contents of argillaceous materials.

根据酸性凝灰岩和酸性火山事件粘土岩的自然伽马测井曲线,对当前流传的"沉积岩层的放射性强度(或放射性核素的含量)随泥质含量的增加而增高"的概念和用自然伽马值及经验公式求泥质含量提出质凝。