Method for measuring strength of cementing materials

Abstract

The invention discloses a method for measuring the strength of cementing materials. The method includes the following steps: step1, testing the apparent density of cement and the apparent density of a mineral admixture, step2, obtaining the reaction degree of the mineral admixture in slurry of the cementing materials, step3, obtaining the hydration degree of the cement in the slurry of the cementing materials, step4, obtaining three main influence factors influencing the strength of the cementing materials, step5, establishing a cementing material strength GM (1,4) model, and step6, substituting the three main influence factors of the cementing materials to be measured to the cementing material strength GM (1,4) model to obtain the strength of the cementing materials. According to the method, the strength of different cementing material combinations can be obtained by calculation through simple tests, and the method is high in accuracy, good in reliability and capable of solving the problem that only through strength tests can the strengths of all the different cementing material combinations be obtained.

Description

technical field [0001] The invention relates to a measuring method, in particular to a measuring method for the strength of a gelled material. Background technique [0002] The strength of cement is tested according to the "Cement Mortar Strength Test Method (ISO Method)" (GB / T17671-1999). However, the preparation of high-performance concrete generally requires the addition of mineral admixtures, so that the composition of the cementitious material changes. However, the strength of different combinations of cementitious materials can only be obtained through strength tests, which not only requires the formation of a large number of mortar specimens, but also waits until the curing age of the mortar specimens is 28 days, which is cumbersome. It is time-consuming and consumes a lot of manpower and material resources. [0003] So far, there have been many studies and applications on the strength of cementitious materials, and the methods with wide application and high design a...

AI Technical Summary

Problems solved by technology

In order to obtain accurate design prediction results, the neural network method needs enough test values ​​of the training network, and can not obtain the analytical expression between the strength and the influencing factors; the orthogonal design method and the empirical formula regression method consider the influence of the strength. The factors are limited, and because there is no corresponding analytical expression between the strength and the influencing factors, it is impossible to obtain the correlation between each influencing factor and the strength; there are certain restrictions on the use of the simplex center of gravity design method, such as the The dosage should not exceed a certain limit, and its universality needs to be further verified

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