Microstructure And Mechanical Properties Of β-hemihydrate …
Fig. 3b and c shows the XRD pattern of the hydrated gypsum with w 0 /h 0 of 0.65 and 0.80, respectively. The results show obvi ously that the hydrated system only include CaSO4 2H2O, which … Access Doc

ADVANCES IN QUANTITATIVE XRD ANALYSIS FOR CLINKER, CEMENTS …
Precise results by conventional quantitative XRD analysis cannot be obtained. Preferred orientation effects that can occur in powder samples also limit the method. The sulphate phases in Portland Cement, especially gypsum is Later the method was adapted to X-ray diffraction data by Malmros … Read Full Source

Thaumasite – Wikipedia, The Free Encyclopedia
It occurs with zeolites, apophyllite, analcime, calcite, gypsum and pyrite. Thaumasite can also be formed along with other calcium-silicate hydrates during cement alteration, especially when sulfate attack develops. … Read Article

Expansive Binders In The Portland Cement Calcium Aluminate …
/CAC = 0.6, in which the sulfate source is gypsum (G) or anhydrite (A). Fig. 4. The intensity of ettringite XRD peak (9.7 Å) vs. time for compositions with expansive admixture/Portland cement = 20/80 … Doc Viewer

Continuous Phase Analysis: A Step Forward For Quality Control.
Page 3 www.fctinternational.com include long-term stability, response to gypsum derivatives and accuracy in predicting oxides. These tests all demonstrate that the analyser is performing well and clearly within the guaranteed performance specifications. … Read Document

Clark Eldredge, Environmental Administrator Bureau Of …
Results X-ray diffraction (XRD) – XRD results showed that all four samples had very similar patterns with respect to peak positions and intensities when compared to the standard gypsum pattern. … Document Retrieval

Gypsum Whiskers InMessinian Evaporites IdentiWed By-XRD2
Facies (2011) 57:249-253 DOI 10.1007/s10347-010-0237-x 123 ORIGINAL ARTICLE Gypsum whiskers inMessinian evaporites identiWed by-XRD 2 S. B. Ziegenbalg · C. Berthold · A. Kappler · J. Peckmann Received: 12 May 2010 / Accepted: 23 September 2010 / Published online: 9 October 2010 © Springer … Get Content Here

Automatic Control Of Cement Quality Using On-Line XRD
The technique is highly developed and able to detect most cement minerals, even distinguish between the different phases of aluminates, belite and gypsum for example. While XRD is often carried out in a laboratory, a number of plants have installed a field instrument, which analyzes a continuous stream … Retrieve Doc

Isothermal Dehydration Of Natural And Synthetic Gypsum And …
For synthetic samples SG-E, SG-B, SG-D, and SG-H, weight loss in the temperature range of gypsum decomposition is close to 20.8% indicating high gypsum content, while XRD data shows only trace amount of calcite and/or quartz for these samples. … View Document

D2 PHASER Desktop XRD: Quantitative Phase Analysis Of Gypsum …
Bruker AXS think forward XRD Application Report XRD 11 D2 PHASER Desktop XRD: Quantitative phase analysis of Gypsum/Anhydrite samples The D2 PHASER is a portable desktop XRD instrument for research and quality control. … Retrieve Content

EFFECT OF WASTE GYPSUM FROM CERAMIC SLIP CASTING MOULD ON THE …
Prior to cement grinding test work, the raw materials such as clinker, natural gypsum and waste gypsum had been characterized using X-Ray Diffraction, X-Ray Fluorescence, Differential Scanning Calorimetry / Thermogravimetry and Field Emission Scanning Electron Microscopy. … Access Doc

Continuous On-line Measurement Of Cement And Clinker …
Data showing significant real time variations in production cement mineralogy including free lime, portlandite and gypsum hydration states will be presented and discussed. Using this information to optimise the production process is also discussed. 1. Introduction In recent years X-ray diffraction (XRD … Document Viewer

Avoid Setting Time Problems: Control Gypsum/Hemihydrate Ratio …
A NEW ON-STREAM XRD TECHNOLOGY FOR MEASUREMENT AND CONTROL OF GYPSUM DE-HYDRATION/SETTING TIMES. Avoid Setting Time Problems: Control Gypsum/Hemihydrate Ratio Using Continuous XRD … Retrieve Here