Insights into early hydration of Portland limestone cement from infrared spectroscopy and isothermal calorimetry

Ylmén, Rikard; Wadsö, Lars; Panas, Itai

doi:10.1016/j.cemconres.2010.06.008

Cited by 99 publications

(36 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Carbonate and clay mineral abundances in carbonate rock samples could be analyzed and estimated by applying these physical models ( Figure 6) based on the spectroscopic parameter, especially the depth of absorption feature. This study confirms the results of previous studies [19,[32][33][34][35] that used the infrared spectroscopy technique for characterizing the chemistry of cement products and hydration rate. These results also indicate that the SWIR spectroscopic approach can be used as a direct method for the characterization of other raw materials from a laboratory to real-time processes in the field or quarry.…”

Section: Discussionsupporting

confidence: 81%

An Alternative Quality Control Technique for Mineral Chemistry Analysis of Portland Cement-Grade Limestone Using Shortwave Infrared Spectroscopy

et al. 2016

View full text Add to dashboard Cite

Shortwave infrared (SWIR) spectroscopy can be applied directly to analyze the mineral chemistry of raw or geologic materials. It provides diagnostic spectral characteristics of the chemical composition of minerals, information that is invaluable for the identification and quality control of such materials. The present study aims to investigate the potential of SWIR spectroscopy as an alternative quality control technique for the mineral chemistry analysis of Portland cement-grade limestone. We used the spectroscopic (wavelength position and depth of absorption feature) and geochemical characteristics of limestone samples to estimate the abundance and composition of carbonate and clay minerals on rock surfaces. The depth of the carbonate (CO 3 ) and Al-OH absorption features are linearly correlated with the contents of CaO and Al 2 O 3 in the samples, respectively, as determined by portable X-ray fluorescence (PXRF) measurements. Variations in the wavelength position of CO 3 and Al-OH absorption features are related to changes in the chemical compositions of the samples. The results showed that the dark gray and light gray limestone samples are better suited for manufacturing Portland cement clinker than the dolomitic limestone samples. This finding is based on the CaO, MgO, Al 2 O 3 , and SiO 2 concentrations and compositions. The results indicate that SWIR spectroscopy is an appropriate approach for the chemical quality control of cement raw materials.

show abstract

Section: Discussionsupporting

confidence: 81%

An Alternative Quality Control Technique for Mineral Chemistry Analysis of Portland Cement-Grade Limestone Using Shortwave Infrared Spectroscopy

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The presence of HAp, compound with very good biocompatibiliy, is a clear indication of an adequate behavior of these materials if used as dental cements. The FT-IR analysis (Figure 11) of MTA pastes immersed for 14 days in SBF shows the following specific bands [24][25][26] the band of 1639 cm´1 is specific for hydroxyl groups (moisture).…”

Section: Figurementioning

confidence: 99%

“…The FT-IR analysis (Figure 11) of MTA pastes immersed for 14 days in SBF shows the following specific bands [24][25][26]:…”

Section: Figurementioning

confidence: 99%

Influence of Thermal Treatment Conditions on the Properties of Dental Silicate Cements

et al. 2016

View full text Add to dashboard Cite

Abstract:In this study the sol-gel process was used to synthesize a precursor mixture for the preparation of silicate cement, also called mineral trioxide aggregate (MTA) cement. This mixture was thermally treated under two different conditions (1400˝C/2 h and 1450˝C/3 h) followed by rapid cooling in air. The resulted material (clinker) was ground for one hour in a laboratory planetary mill (v = 150 rot/min), in order to obtain the MTA cements. The setting time and mechanical properties, in vitro induction of apatite formation by soaking in simulated body fluid (SBF) and cytocompatibility of the MTA cements were assessed in this study. The hardening processes, nature of the reaction products and the microstructural characteristics were also investigated. The anhydrous and hydrated cements were characterized by different techniques e.g., X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy (FT-IR) and thermal analysis (DTA-DTG-TG). The setting time of the MTA cement obtained by thermal treatment at 1400˝C/2 h (MTA1) was 55 min and 15 min for the MTA cement obtained at 1450˝C/3 h (MTA2). The compressive strength values were 18.5 MPa (MTA1) and 22.9 MPa (MTA2). Both MTA cements showed good bioactivity (assessed by an in vitro test), good cytocompatibility and stimulatory effect on the proliferation of cells.

show abstract

“…16 In contrast, PCs setting reaction is only weakly exothermic and has been shown not to increase localized tissue temperature during setting. 17 The toxic PMMA monomer has also been shown to diffuse from the site of application and has been linked to increased morbidity for patients through pulmonary embolism. 18 PCs allow the incorporation of radiopacifiers enabling monitoring of the cement during placement and postoperatively as is the case for PMMA.…”

Section: Introductionmentioning

confidence: 99%

Development of Portland cement for orthopedic applications, establishing injectability and decreasing setting times

2012

View full text Add to dashboard Cite

The injectability of Portland cement (PC) with calcium chloride and calcium nitrate additives was investigated using a syringe with a 2 mm aperture for potential clinical applications such as vertebroplasty. Addition of either additive at 10 wt % increased the quantity of cement extruded through the syringe from approximately 25 wt % for the PC standard, to over 95 wt %. 10 wt % additions of either additive also decreased setting times from over 2 h to below 25 min. The compressive strength of the modified cements was all greater than the compressive strength of a human vertebral body. Decreasing either additive to 5 wt % generated compressive strengths after 24 h setting equal to polymethylmethacrylate, the cement used for the majority of vertebroplasty procedures. An initial early exotherm in the chloride cements was coupled with an X-ray diffraction (XRD) peak that indicated the early formation of the ettringite cement phase. In contrast, Fourier transform infrared (FTIR) spectroscopy and XRD data indicated that calcium nitrate may have stimulated early calcium silicate hydrate (CASAH) production (the main strength producing phase of PC). Combining the two additives produced a synergistic effect with cements having increased injectabilities and compressive strengths compared with either addition used individually. This study has demonstrated that by modifying PC with nonproprietary chemicals it was possible to significantly increase cement injectability and reduce setting times whilst maintaining compressive strengths, making PC suitable for potential orthopedic applications.

show abstract

Insights into early hydration of Portland limestone cement from infrared spectroscopy and isothermal calorimetry

Cited by 99 publications

References 16 publications

An Alternative Quality Control Technique for Mineral Chemistry Analysis of Portland Cement-Grade Limestone Using Shortwave Infrared Spectroscopy

An Alternative Quality Control Technique for Mineral Chemistry Analysis of Portland Cement-Grade Limestone Using Shortwave Infrared Spectroscopy

Influence of Thermal Treatment Conditions on the Properties of Dental Silicate Cements

Development of Portland cement for orthopedic applications, establishing injectability and decreasing setting times

Contact Info

Product

Resources

About