【摘要】 在标准 ＳＹ／Ｔ ５９４６－９４的执行过程中，发现其中岩心线性膨胀降低率这一指标不能很好地评价产品质量的优劣，通过实现观察与分析提出该问题存在的主要原因是实验用膨润土的类型、用量等与指标不相配套，并提出建议，希望有助于标准的修订。更多还原

【Abstract】 During applying the SY/T 5946-94, the author finds it is difficult to evaluate the chemical prod ucts with the expading reducing, In this paper, the main causes are pointed at that the type and quantity of clay are not compatible with specification. At last the author puts forward some advises which is expected to be useful for the amendment of the standard.更多还原