dynamic modulus of elasticity การใช้

• Testing concrete - recommendations for the measurement of dynamic modulus of elasticity
• Natural stone test methods - determination of the dynamic modulus of elasticity by measuring the fundamental resonance frequency
• Testing of carbonaceous materials - determination of dynamic modulus of elasticity by pulse excitation - solid materials
• Methods of test for dynamic modulus of elasticity , rigidity and poisson ' s ratio of concrete by resonance vibration
• Natural stone test methods - determination of the dynamic modulus of elasticity by measuring the fundamental resonance frequency ; german version en 14146 : 2004
• With changing the value of every parameter of the model , we can analyse the impact on the dynamic modulus of elasticity " of every parameter
• Comparing the dynamic modulus of elasticity of the model in each age with the corresponding values of the test data , we can verified the feasibility of the method
• This means the saturation degree of concrete is different . by means of analyzing the l9 ( 34 ) orthogonal table , the air content is the chief factor , the second factor is water binder ratio and the third is mineral admixture in both high water pressure and low water pressure . the water saturation degree of concrete in damaging point ( e6 / e0 = 60 % ) can be found by measuring the dynamic modulus of elasticity after six freezing - thawing cycles
• The test result shows that the water binder ratio is the chief factor in damaging point . the saturation of concrete and the higher degree of saturation in the surface layer of specimens can be used to explain the damage form of specimens in the freezing - thawing , which include change of relative dynamic modulus of elasticity and weight
• The job of this paper was divided into two parts mainly . firstly , the numerical simulation approach for polygonal aggregate was presented . secondly , the space analysis model for dynamic modulus of elasticity of concrete was set up , and a series of theories analysis and calculations to the model were performed