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In the 1850s, the scientific study of buildings included new approaches to the selection of durable architectural materials, such as salt crystallization testing and the measurement of compressive strength.
This simple instrument allowed in situ measurement of compressive and tensile strengths of the material, providing stress strain curves that have been used to calibrate simple constitutive relationships.
Distribution of ammonium aluminum sulphate, in situ decomposition characteristics, microstructure and mechanical properties of the modified alumina bubbles were investigated by SEM, XRD, BET and by a purposely designed experimental device for the measurement of compressive resistance.
Accordingly, seven different ages of 9, 12, 18, 24, 36, 100 and 168 h at ambient temperature were selected for the measurement of compressive strength.
For each set for the identical conditions of ( f_{cd}^ ) and T max, a total of 14 cylinders −7 sets of two replicas cast for the measurement of compressive strength at 7 different equivalent ages (9, 12, 18, 24, 36, 100 and 168 h)—were placed into the water.
The influence of silica fume (SF) addition on properties of geopolymer materials produced from alkaline activation of alumino-silicates metakaolin and waste concrete produced from demolition works has been studied through the measurement of compressive strength, Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy (SEM) analysis.
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The experiments include characterization of the microstructure and the properties of the base material and measurement of the compressive response of the foams of various cell sizes.
An advanced mechanical characterization of two natural hydraulic lime (NHL) mortars, with water/lime ratios of 0.8 and 1.1, is reported, including direct measurement of the compressive strength on two types of specimens, prisms and cylinders, the flexural strength, the tensile strength, the Young's modulus and the fracture energy.
While conventional tensile elongation tests have been performed to investigate the uniaxial force and length relationship for EOMs [ 1– 5], micro/nano indentation has permitted measurement of the compressive modulus of other orbital tissues [ 6, 7].
In order to examine the long-term stability of dynamic compressive loading, the daily measurements of the compressive strain (20%and40%0%) generated under different operating frequencies (0.5, 1.0, and 2.0 Hz) were carried out, based on the approach aforementioned.
An extensive experimental program was performed in this study to construct a comprehensive database of the measurements of uniaxial compressive strength, point load index, Schmidt rebound hammer value, P-wave velocity, effective porosity, specific gravity and dry density.
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