Common concrete epoxy grout quality detection method

Commodities detection (1) of the strength of concrete epoxy grout concrete strength testing method for now more commonly used with rebound method and ultrasonic rebound synthesis method, draw method, core method. The rebound method and ultrasonic rebound synthesis method are not damaged. Rebound method is simple, and can better reflect the uniformity of concrete products, more than half a century of our country is also repeatedly revised technical specification of rebound method, the number is changed to JGJ/T23-2011 2011. Rebound method should carry on the acceptance of the commercial concrete strength. The same acceptance of goods shall be conducted by the same strength grade of concrete, raw materials, age, the same curing condition and production process is the same as the mixture ratio of the same components, and we have strict rules on the number of sampling. (2) ultrasonic rebound synthetic method is Romania in 1966 of the commercial concrete strength first proposed construction and economic construction science research institute, 1988, our country also approved the ultrasonic rebound synthesis technology of the commercial concrete epoxy grout strength regulation ( CECS02：88) 。 Relative to the single rebound method of ultrasonic rebound synthetic method can reduce the age of the commercial concrete strength and the moisture content of the impact of commodity concrete strength, make up the shortfall, increase testing precision. (3) after filling out method is a kind of damage detection methods, refers to the goods in the hardened concrete surface drilling, grinding groove, embedded anchor a pull out and install the instrument to carry on the pull-out tests, determination of limit drawing output, according to the established beforehand pull output and commodities on the correlation relationship between concrete strength testing concrete strength. Of drawing on the stress condition of commercial concrete is uncertain, it is only with the drawing as the relative indicators of quality of commercial concrete strength, when using pull method presumption of commodity concrete compressive strength, the goods must be established between the compressive strength of concrete standard and drawing strength of the experience. (4) core method is the use of special drill, drill core samples from the commercial concrete structure to detect commercial concrete strength inside the concrete quality and observation method, is also a half damage detection methods. Core method to detect commodity concrete strength has intuitive, reliable, and the characteristics of high precision. Test shows that the ages are too short or not reached 10 mp of commercial concrete strength, not appropriate to use core method, and because more will cause local damage to structures, the core position and quantity also to have certain restriction, more need to repair the hole, after the more heavy machine equipment, the emergence of the problem of high cost, caused more method has certain limitations. Epoxy grout