Indicator for determining alkalinity of finished product of cement and application thereof

Abstract

The invention belongs to the field of constructional engineering and relates to an indicator for determining alkalinity of the finished product of cement and application thereof. The indicator is prepared and finished by the following steps of: (1) dissolving phenolphthalein into 60% ethanol according to the massic volume ratio of 1:1000; (2) dissolving thymolphthalein into 90% ethanol according to the massic volume ratio of 1:100; (3) dissolving alizarin red into 90% ethanol according to the massic volume ratio of 4:1000; (4) dissolving titan yellow into 90% ethanol according to the massic volume ratio of 3:1000; and (5) fully mixing the solution of the same volume obtained in the previous four steps, so as to prepare the indicator for determining the alkalinity of the finished product of the cement. The indicator has the advantages of simpleness in raw material, extremely low cost, convenience and practicability.

Description

technical field [0001] The invention belongs to the field of construction detection, and in particular relates to an indicator for measuring the alkalinity of cement products. Background technique [0002] At present, our country is in an era of rapid economic development, and various constructions are underway. In the field of construction, cement is the most commonly used basic raw material and plays a vital role. In the production of cement, alkaline activator is often added to improve the chemical properties of raw materials, and its addition will affect the strength of cement products. [0003] Most of the existing cement alkalinity testing techniques are to pulverize the finished cement products to make a solution, and then test the pH value. Cement products that cannot be crushed, such as large and important buildings, cannot be destructively tested. Therefore, traditional detection methods are almost impossible to achieve. Contents of the invention [0004] The t...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing cement alkalinity testing techniques are to pulverize the finished cement products to make a solution, and then test the pH value. C