Method for analyzing and identifying polycarboxylate superplasticizer

Abstract

The invention relates to a method for analyzing and identifying a polycarboxylate superplasticizer. The method comprises the following steps of: (1) preparing standard polycarboxylate superplasticizersample powder for infrared spectrum determination and to-be-detected polycarboxylate superplasticizer sample powder; (2) determining the infrared spectrum of the standard polycarboxylate superplasticizer sample powder; (3) carrying out Fourier transform infrared spectrum data acquisition on the to-be-detected polycarboxylate superplasticizer sample powder; (4) respectively calculating correctionpeak areas of 11 absorption peaks of the infrared spectra of the standard polycarboxylate superplasticizer sample powder and the to-be-detected polycarboxylate superplasticizer sample powder for similarity calculation; (5) repeating the steps (2) to (4) for six times, and taking a mean value of six test results as a test value of the infrared spectrum; and (6) calculating the similarity S of the infrared spectra of the standard sample and the to-be-detected sample, and comparing the similarity with a preset similarity threshold, and judging whether the to-be-detected sample and the standard sample are the same sample or not. The method is simple to operate and accurate in analysis.

Description

technical field [0001] The invention relates to the field of quality control of water reducers, in particular to an analysis and identification method for polycarboxylate water reducers. Background technique [0002] With the rapid development of infrastructure projects, the quality requirements of concrete are constantly improving, which promotes the development of concrete towards high strength, high fluidity and high durability. As an indispensable part of modern concrete raw materials, concrete admixture plays a vital role in improving the performance of concrete. Among them, water reducing agent is currently the largest concrete admixture, and the amount has exceeded 80% of the admixture amount. %. [0003] Polycarboxylate water reducer is the third generation of water reducer after lignin sulfonic acid water reducer and naphthalene series water reducer. It has become a modern The most used water reducer in concrete. The quality of polycarboxylate superplasticizer (P...

AI Technical Summary

Problems solved by technology

This traditional detection method is not only time-consuming and labor-intensive, but also requires high operating requirements for the test personnel, resulting in large test errors.

Therefore, it is difficult to obtain the characteristic information of the water reducer by relying on the conventional performance test indicators of concrete, that is, the so-called "fingerprint information", and it is difficult to achieve effective quality control of the polycarboxylate water reducer. Long-term quality risks to concrete structures

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