Study of gypsum by PDSC | Journal of Thermal Analysis …
It probably results from partial rehydration of anhydrite with the remaining water vapor, which would be represented by the small exotherm observed at 265 °C in Fig. 6, or from spontaneous rehydration when exposed to ambient for XRD analysis. The results presented here demonstrate how the combined effect of pressure and self generated vapor of ...
Gypsum and anhydrite in foundations of hydraulic structures
There have been many recorded cases of distressed dams caused by the solution of anhydrite or gypsum from their foundations. The solution processes have now been examined quantitatively and predictive methods put forward on the basis of laboratory measurements. Solution mechanisms have been established and specific solution rates determined which lead to the …
son, P. (1939) Interaction between the Multiplier Analysis …
son, P. (1939) Interaction between the Multiplier Analysis and the Principle of Acceleration. Review of Economic Statistics, 4, 75-78.
The Acceleration Principle: Understanding Its Dynamics, …
The acceleration principle underscores the importance of aligning investment decisions with the trajectory of consumer demand. While businesses aim to capitalize on opportunities for growth and expansion, they must navigate the inherent uncertainties and risks associated with economic cycles and market dynamics.
Acceleration and higher-order analyses solved by extending …
The principle of superposition [1] is applicable when the mathematical model of the problem to be solved is constituted by a system of equations that are linear and homogeneous in the input and the output variables. In the kinematic analysis of mechanisms, only the velocity analysis of holonomic or first-order non-holonomic mechanisms with time-independent …
(PDF) Research on Mechanical Properties of High-Pressure …
The structure parameters of anhydrite crystal were obtained by means of first principles after structure optimization at 0~120 MPa.
Experimental and Numerical Simulation Investigation of …
studied the tensile strength of the anhydrite intact rock and rock mass through laboratory analysis and eld investigation. Zhang et al. (2019) used Brazilian disc splitting tests to determine the tensile Young's modulus and Poisson's ratio of anhydrite rock. Due to the water–rock expansion and dissolution
Dynamic displacement estimation and modal analysis of …
Compared with acceleration-based modal analysis, displacement can provide a more reliable and robust identification result for output-only modal analysis of long-span bridges. However, the estimated displacements from acceleration records are frequently unavailable due to unrealistic drifts. Aiming at obtaining more accurate and stable results for determining the …
Making of anhydrite cement from waste gypsum
The strength development of hardened anhydrite was supplemented by X-ray diffraction and differential thermal analysis. The results are plotted in Fig. 3, Fig. 4, respectively. X-ray diffractograms (Fig. 3) show reflections for the formation of glauberite (Na 2 SO 4 ·CaSO 4 ), ferrinatrite (Na 3 FeSO 4 ·3H 2 O), gypsum (CaSO 4 ·2H 2 O) and ...
The Principle of Acceleration and Super Multiplier in Business Economics
If Y t > Y t-1 net investment is positive during period t. On the other hand, if Y t < Y t-1 net investment is negative or there is disinvestment in period t.. Operation of the Acceleration Principle: The working of the acceleration principle is explained in Table I. The table traces changes in total output, capital stock, net investment and gross investment over ten time periods.
Pore structure characteristics and permeability analysis of …
Here, we characterized the pore structure and permeability of natural anhydrite-based cementitious material under various water-anhydrite (W/A) ratios based on the mercury …
Pore structure characteristics and permeability analysis of …
The characteristics of the gypsum pore structure are closely related to its macroscopic mechanical properties and permeability. Recent research on anhydrite-based cementitious materials is mainly focused on modification and enhancement and their effect on pore structure characteristics, while the relationship between pore structure and permeability …
Gypsum and anhydrite in foundations of hydraulic structures
Anhydrite can dissolve dangerously so that rapidly accelerating seepage flows occur within a few years unless there are rigorous control procedures. A rational form of site investigation is …
Sci-Hub | Interactions between the Multiplier Analysis and …
son, P. A. (1939). Interactions between the Multiplier Analysis and the Principle of Acceleration. The Review of Economics and Statistics, 21(2), 75. doi:10.2307/1927758
Velocity and Acceleration Analysis of Mechanisms …
• We know that the radial component of the acceleration of B with respect to O or the acceleration of B, and the radial component of the acceleration of A with respect to B, NOTE: 1) A point at the end of a link which moves with constant angular velocity has no tangential component of acceleration. 2) When a point moves along a straight line,
Principles of Charged Particle Acceleration
This book is an introduction to the theory of charged particle acceleration. It has two primary roles: 1.A unified, programmed summary of the principles underlying all charged particle accelerators. 2.A reference collection of equations and material essential to accelerator development and beam applications.
Time-Dependent Reliability Analysis of Anhydrite Rock …
This study presents an analytical approach for evaluating the reliability of anhydrite rock tunnels, focusing on their characteristic swelling behavior. Anhydrite rocks, prone to significant expansion upon moisture exposure, pose a challenge in tunnel construction, potentially leading to structural issues such as floor heave and lining damage. To address this, …
Principles of Charged Particle Acceleration
Particle Dynamics Electric and Magnetic Forces Steady-State Electric and Magnetic Fields Modification of Electric Surfaces Electric and Magnetic Field Lenses Calculation of Particle Orbits in Focusing Fields Transfer Matrices and Periodic Focusing Systems Electrostatic Accelerators and Pulsed High Voltage Linear Induction Accelerators Betatrons Resonant Cavities and …
Experimental and Numerical Simulation Investigation of …
To study the mechanical and crack-ing modes of anhydrite rock under the freeze–thaw weathering process, the physico-mechanical charac-teristics and morphology evolutions of …
Chapter 1 Physical Principles of Cathodoluminescence …
4J.Gotze and U. Kempe¨ Fig. 1.2 Interaction of an electron beam with a solid showing the resulting signals in dependence on the penetration depth of electrons A – direct excitation of cathodoluminescence by secondary electrons yields escape depths of tenth of nm or less; B – energy migration causes significant separation of excitation and emission site (eg in samples …
Effects of temperature and CO2 on the frictional behavior of simulated
The frictional behavior of anhydrite-bearing faults is of interest to (a) the safety and effectiveness of CO 2 storage in anhydrite-capped reservoirs, (b) seismicity induced by hydrocarbon production, and (c) natural seismicity nucleated in evaporite formations. We performed direct shear experiments on simulated anhydrite fault gouges, at a range of …
Principle and performance of a superconducting angular accelerometer
An angular acceleration sensor can be used for the dynamic analysis of human and joint motions. In this paper, an angular acceleration sensor with novel structure based on the principle of ...
Simulation-based analysis of impact of CNT dispersion on …
This paper proposes a new method for quantitative analysis of the impact of CNT dispersion on cement paste by utilizing a hydration model of CNT-reinforced cement paste [13].Lee et al. [13] proposed hydration model of CNT-reinforced cement paste CNT-model …
A Practical Swelling Constitutive Model of Anhydrite …
After mineral composition analysis, these anhydrite rocks were processed into disk-shaped samples with 61 mm in height and 20 mm in diameter according to the recommendations of ISRM (1989) [18].
Analysis of Structure and Textures of Anhydrite Mineral in …
6.1. Anhydrite Structures Anhydrite structures in this study have the following types: (Figure 6). 6.1.1. Massive Anhydrite Structure This structure consists of masses in the thickness of a few centimeters to one meter. Massive anhydrite has been composed of various textures such as bladed, parallel, felt, equant and fibrous.
Influence of free calcium sulfate levels on the early hydration …
These clinkers were subsequently mixed with anhydrite and gypsum for comparative analysis. Utilizing a range of analytical techniques such as isothermal calorimetry, X-ray diffraction (XRD), and thermogravimetric analysis (TGA), the early hydration process and the constitution of hydration products were systematically investigated.
Analytical Balance: Parts, Principle, and Applications
Also known as equal arm analytical balance, which works on the principle of the first-class lever. It consists of a symmetrical beam and three knife edges. Two terminal knives support the pans, and the central knife-edge acts as a pivot about which a beam swings. ... Used in the determination and analysis of the density of solvent.
Experimental and Numerical Simulation Investigation of the …
To study the mechanical and cracking modes of anhydrite rock under the freeze–thaw weathering process, the physico-mechanical characteristics and morphology evolutions of anhydrite samples were determined by a series of laboratory tests. Then, a numerical simulation model was established through the PFC2D program, and the types and …
Insights into the role of slag fineness on the hydration of …
This acceleration leads to an increase in hydration heat and enhanced hydration degree of slag. Consequently, it promotes the precipitation of more hydrates and improves the …
Interactions Between the Multiplier Analysis and the Principle …
Interactions Between the Multiplier Analysis and the Principle of Acceleration. Paul A. son. Kessinger Publishing, 2010 - 12 pages. 0 Reviews. Reviews aren't verified, but Google checks for and removes fake content when it's identified. What people are saying - …