Concrete strength measurement method based on ultrasonic contact impedance methodThe amount of change. Delta.fy of the frequency of Fe0 when the indenter is not in contact with the iron piece and the frequency of vibration Fe1 when the indenter is pressed against the iron piece is obtained.The...
Hence, the compressive strength of concrete at the age of 28 days is often used as a quality inspection indicator in engineering [1]. Compression load testing is the usual method for determining the compressive strength of concrete. The test is time-consuming and sample selection is subjective,...
PURPOSE:To expand a measurement range and to improve measurement precision by measuring the slump of concrete being kneaded on the basis of the scale of the slump to the absolute value of a load during the concrete kneading obtained on the basis of plural past data. CONSTITUTION:When the kind...
To determine the compressive strength of a test region according to EN13791, you must make measurements at a minimum of 9 test locations. Then they must be evaluated according to certain rules. For each impact measurement, the user must unlock the Schmidt hammer, execute the impact, read the...
7 studied the influence of water saturation and loading rate on the performance of dam concrete under biaxial compression, and considered that the ultimate strength of dry and saturated concrete increased with the increase of strain rate, while the damage pattern and ultimate strength were closely ...
The concrete maturity measurement method based on the ASTM C1074 is the most commonly used to estimate the in-situ strength of concrete. ASTM C1074 provides two maturity functions: 1) Nurse-Saul function; and 2) Arrhenius function. Based on the Nurse-Saul method, there is a linear relationsh...
In this study, concrete compressive strength was estimated using the decision tree, linear regression, support vector machine and artificial neural network methods. And, the following results were reached in the concrete compressive strength estimation: (1) In the LR method, the worst predictive value...
The size effect of concretes with warious strength levels are discussed in this paper.As the strength level rose,the size effect on compressive strength ap... ZY Wang - 《Building Science Research of Sichuan》 被引量: 7发表: 2005年 Feasibility of Non-Contacting Measurement of Wind-Induced Ful...
For example, the chemical analysis method has high accuracy, but it is not suitable for the detection of a variety of aggressive ions11. Even though the ultrasonic detection method has poor accuracy, it is suitable for determining sample with large aggressived depth12,13. And the strength ...
1) concrete strength measurement 砼强度检测2) test of concrete rigidity 砼强度测试3) strength testing 强度检测 例句>> 4) strength test 强度检测 1. Adjacent-channel transient Rayleigh wave method and its application in compression strength test of water-tight wall; 相邻道瑞雷波法及在防渗墙...