Front. Mater.Frontiers in MaterialsFront. Mater.2296-8016Frontiers Media S.A.110188110.3389/fmats.2022.1101881MaterialsCorrectionCorrigendum: Mechanism of long-term strength retrogression of silica-enriched Portland cement assessed by quantitative X-ray diffraction analysisQin et al.10.3389/fmats.2022.1101881QinJiankun1PangXueyu12*LiHailong1ZhangZhen11School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, China2Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao, China*Correspondence: Xueyu Pang, x.pang@upc.edu.cn
This article was submitted to Polymeric and Composite Materials, a section of the journal Frontiers in Materials
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A Corrigendum on Mechanism of long-term strength retrogression of silica-enriched Portland cement assessed by quantitative X-ray diffraction analysisby Qin J, Pang X, Li H and Zhang Z (2022). Front. Mater. 9:982192. doi: 10.3389/fmats.2022.982192quantitative X-ray diffraction analysisexternal standardpartial or no known crystal structurestrength retrogressionoil well cement
In the original article, there were some errors in Figures 4, 8–11 as published. The tobermorite contents of sample 90d-FS-1 and sample 90d-FS-2 were plugged incorrectly in the line plots (Figure 8 and Figure 11). The mass absorption coefficient (MAC) was not corrected when calculating the phase compositions of the sample 180d-FS-1 (Figures 4, 8–11). The corrected Figures 4, 8–11 and their captions appear below.
(A–D) Phase compositions of hydrated cement quantified using the external standard method at various curing times.
Quantitative X-ray diffraction analysis of hydrated cement using the external standard method (filled symbols linked by solid curves) and the PONKCS method (hollow symbols linked by dash curves). (A) slurry CS-1 (B) slurry CS-2 (C) slurry FS-1 (D) slurry FS-2.
(A–D) Phase compositions of hydrated cement quantified using the hybrid method at various curing times.
Comparison of the amorphous phase content obtained by different methods. (E: the external standard method; P: the PONKCS methods; H: the hybrid method). (A) slurry CS-1 (B) slurry CS-2 (C) slurry FS-1 (D) slurry FS-2.
Comparison of the crystalline phase contents obtained by different methods. (E: the external standard method; P: the PONKCS methods; H: the hybrid method). (A) slurry CS-1 (B) slurry CS-2 (C) slurry FS-1 (D) slurry FS-2.
The authors apologize for these errors and state that this does not change the scientific conclusions of the article in any way because these changes are relatively small. The original article has been updated.
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