X-Ray Fluorescence Analysis of Portland Cement through the Use of Experimentally Determined Correction Factors

1974 ◽  
pp. 214-224 ◽  
Author(s):  
C. H. Anderson ◽  
J. E. Mander ◽  
J. W. Leitner
Keyword(s):  
Portland Cement ◽  
Fluorescence Analysis ◽  
Correction Factors ◽  
X Ray

X-Ray Fluorescence Analysis of Portland Cement Through the Use of Experimentally Determined Correction Factors

1973 ◽  
Vol 17 ◽  
pp. 214-224
Author(s):  
C. H. Anderson ◽  
J. E. Mander ◽  
J. W. Leitner
Keyword(s):  
Portland Cement ◽  
Fluorescence Analysis ◽  
Reference Standards ◽  
Primary Radiation ◽  
Correction Factors ◽  
Standard Samples ◽  
Cement Sample ◽  
Average Deviation ◽  
X Ray

AbstractCorrection factors, termed α-factors, similar to those defined by LaChance and Traill have been generated by the addition of variable, known amounts of individual oxides, or other compounds, to a base cement sample and measuring the x-ray intensities of the elements of interest. The effects of all common constituents of cement on the determination of CaO, SiO2 and Al2O3 were found. Factors for rhodium and chromium primary radiation were determined and, in general, showed small but significant differences. The factors for rhodium at 50kV and 30kV were substantia11y identical. The correction factors were tested through the use of the NBS 1011- 1016 cements as reference standards to analyze the new proposed NBS cement series. The correction factors not only furnished improved calibration curves, but also allowed the determination of CaO, Al2O3 and SiO2 with an average deviation of less than 0.2% (absolute) from the provisional values furnished with the standard samples.

scholarly journals STUDY OF THE CHEMICAL INTERACTION OF GLASS FIBER WITH CEMENT HYDRATION PRODUCTS

2021 ◽  
Vol 5 (12) ◽  
pp. 119-125
Author(s):  
N. Bondarenko ◽  
D. Bondarenko ◽  
E. Evtushenko
Keyword(s):  
Phase Composition ◽  
Portland Cement ◽  
Glass Fiber ◽  
Chemical Interaction ◽  
Fluorescence Analysis ◽  
Hydration Products ◽  
Alumina Cement ◽  
X Ray ◽  
Negative Effect ◽  
The Stability

Reinforcement of concrete with fiberglass improves the performance properties of concrete. The object of the study is fiberglass concrete, where Portland cement or alumina cement is used as a binder, and silica fiberglass is used as a filler. The chemical and phase compositions of Portland cement and alumina cement have been studied. The influence of the products of hydration of Portland cement and alumina cement on the chemical resistance of glass fiber has been investigated. The phase composition of Portland cement and alumina cement after hydration is studied using X-ray phase analysis. It is revealed that the following phases are present in alumina cement: CaОAl2O3, MgОAl2O3, 12CaO•7Al2O3, 2CaO•Al2O3•SiO, the phase composition of Portland cement is Ca6Al2(SO4)3(OH)12•12H2O, Ca2,25(Si3O7,5(OH)1,5)•(H2O), Ca(OH)2, CaCO3. It has been found that when hydrated, Portland cement has a negative effect on fiberglass due to the presence of Ca(OH)2 in it. The phase composition of the alumina cement after hydration shows the absence of Ca(OH)2. The chemical composition of fiberglass is investigated using X-ray fluorescence analysis. The use of alumina cement when using non-alkali-resistant fiberglass in a composite material is substantiated. The study of the stability of fiberglass in the environment of cement drawing has been carried out. Studies have shown that KV-11 grade fiberglass interacted less with hydration products of alumina cement than with hydration products of Portland cement.

X-ray fluorescence analysis of Portland cement and clinker for major and trace elements: accuracy and precision

2017 ◽  
Vol 53 (2) ◽  
pp. 743-749 ◽  
Author(s):  
Selma Khelifi ◽  
Fadhila Ayari ◽  
Houcine Tiss ◽  
Dalila Ben Hassan Chehimi
Keyword(s):  
Trace Elements ◽  
Portland Cement ◽  
Fluorescence Analysis ◽  
Major And Trace Elements ◽  
X Ray ◽  
Accuracy And Precision

Limit dilution method: determination of correction factors for resolving matrix effects in X-ray fluorescence analysis

1988 ◽  
Vol 43 (6-7) ◽  
pp. 811-818 ◽  
Author(s):  
F.Bosch Reig ◽  
T.Domenech Carbó ◽  
V. Peris Martinez ◽  
J.V.Gimeno Adelantado
Keyword(s):  
Matrix Effects ◽  
Fluorescence Analysis ◽  
Dilution Method ◽  
Correction Factors ◽  
X Ray ◽  
Limit Dilution Method

An x-ray microprobe based upon a close-coupled focal-spot / glass capillary arrangement

1992 ◽  
Vol 50 (2) ◽  
pp. 1758-1759
Author(s):  
D. A. Carpenter ◽  
M. A. Taylor
Keyword(s):  
Imaging Techniques ◽  
Fluorescence Analysis ◽  
High Sensitivity ◽  
Specimen Preparation ◽  
X Rays ◽  
Glass Capillary ◽  
Close Coupling ◽  
X Ray ◽  
Point To Point ◽  
Beam Damage

The development of intense sources of x rays has led to renewed interest in the use of microbeams of x rays in x-ray fluorescence analysis. Sparks pointed out that the use of x rays as a probe offered the advantages of high sensitivity, low detection limits, low beam damage, and large penetration depths with minimal specimen preparation or perturbation. In addition, the option of air operation provided special advantages for examination of hydrated systems or for nondestructive microanalysis of large specimens.The disadvantages of synchrotron sources prompted the development of laboratory-based instrumentation with various schemes to maximize the beam flux while maintaining small point-to-point resolution. Nichols and Ryon developed a microprobe using a rotating anode source and a modified microdiffractometer. Cross and Wherry showed that by close-coupling the x-ray source, specimen, and detector, good intensities could be obtained for beam sizes between 30 and 100μm. More importantly, both groups combined specimen scanning with modern imaging techniques for rapid element mapping.

XRMF applications of a monolithic, polycapillary, focusing x-ray optic

1996 ◽  
Vol 54 ◽  
pp. 240-241
Author(s):  
D. A. Carpenter ◽  
Ning Gao ◽  
G. J. Havrilla
Keyword(s):  
Trace Elements ◽  
Point Source ◽  
Focal Spot ◽  
Fluorescence Analysis ◽  
X Rays ◽  
Focal Distance ◽  
Spot Diameter ◽  
X Ray ◽  
Focal Spot Diameter

A monolithic, polycapillary, x-ray optic was adapted to a laboratory-based x-ray microprobe to evaluate the potential of the optic for x-ray micro fluorescence analysis. The polycapillary was capable of collecting x-rays over a 6 degree angle from a point source and focusing them to a spot approximately 40 µm diameter. The high intensities expected from this capillary should be useful for determining and mapping minor to trace elements in materials. Fig. 1 shows a sketch of the capillary with important dimensions.The microprobe had previously been used with straight and with tapered monocapillaries. Alignment of the monocapillaries with the focal spot was accomplished by electromagnetically scanning the focal spot over the beveled anode. With the polycapillary it was also necessary to manually adjust the distance between the focal spot and the polycapillary.The focal distance and focal spot diameter of the polycapillary were determined from a series of edge scans.

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