火山灰质材料的火山灰活性检测方法综述

Review of Pozzolanic Activity Detection Methods for Pozzolanic Materials

本文将火山灰质材料的火山灰活性检测方法分为直接法和间接法两大类。其中,直接法包括石灰吸收值法,火山灰反应程度评定法和酸、碱溶出度法;而间接法包括物理性能法,水化反应放热量法和物理、化学特征参数法。为正确指导火山灰活性检测方法的应用,本文详细介绍并比较了各检测方法的原理和特点。笔者认为,直接法可直接测定出火山灰质材料与Ca(OH)2反应的程度,但其操作和分析过程相对复杂;间接法可通过测定火山灰质材料对体系物化性能的影响或材料自身的物理、化学特征参数来评价其火山灰活性。本文从材料科学的角度厘清了各检测方法的适用对象,认为应根据不同的火山灰质材料的特性选择与其相适应的火山灰活性检测方法。

This review categorizes the pozzolanic activity detection methods of pozzolanic materials into direct methods and indirect methods.The direct methods include lime absorption method,pozzolanic reaction degree evaluation and acid/alkali dissolution test;while the indirect methods include physical property method,hydration reaction calorimetry and physical/chemical characteristic parameter method.In order to correctly guide the application of these pozzolanic activity detection methods,this paper introduces and compares the principles and characteristics of each detection method in detail.The direct method can directly measure the degree of reaction between pozzolanic material and Ca(OH)2,but its operation and analysis process are relatively complicated.The indirect method can evaluate the pozzolanic activity by measuring the influence of the pozzolanic material on the physical and chemical properties of the system or the physical/chemical characteristic parameters of the material itself.Further,we clarify the application scope of each detection method from the perspective of material science.Users should select the approp-riate pozzolanic activity detection method according to the characteristics of pozzolanic material.