Chemical shrinkage of cement pastes and mortars at very early age: Effect of limestone filler and granular inclusions

Bouasker, Marwen; Mounanga, Pierre; Turcry, Ph; Loukili, Ahmed; Khelidj, Abdelhafid

doi:10.1016/j.cemconcomp.2007.06.004

Cited by 139 publications

(65 citation statements)

References 21 publications

(29 reference statements)

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“…The presence of limestone powder and natural pozzolan causes an acceleration of the autogenous shrinkage and the hydration process since the very early age. This effect is generally explained by supplementary surface activity provided by the mineral addition particles, creating nucleation sites for hydrates as reported by others researchers [18,19]. At this age, autogenous shrinkage for mortars with slag remains lower than that of ordinary cement for all replacement rates.…”

Section: Discussionmentioning

confidence: 65%

Compressive strength and shrinkage of mortar containing various amounts of mineral additions

Itim

Ezziane

Kadri

2011

Construction and Building Materials

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Section: Discussionmentioning

confidence: 65%

Compressive strength and shrinkage of mortar containing various amounts of mineral additions

Itim

Ezziane

Kadri

2011

Construction and Building Materials

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“…The rheological parameters of hydrating suspensions were determined from the flow curves taken with a rotational viscometer. Some selected samples were subjected to the evaluation of the so-called chemical shrinkage, using basic laboratory equipment (glass vials and pipettes) and procedure similar to that given in the ASTM Standard C 1608-07 [12,13]. Some samples were observed under SEM with EDS microanalyzer, to characterize the microstructure.…”

Section: Methodsmentioning

confidence: 99%

Application of calorimetry as a main tool in evaluation of the effect of carbonate additives on cement hydration

Nocuń-Wczelik

Trybalska

Żugaj

2013

J Therm Anal Calorim

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Calorimetry was applied to follow the hydration in the Portland cement-dolomite-limestone mixtures.In the experiments the limestone additive of various fineness (standard component of various common cements), as well as the dolomite additive (not a standard component) were used. The rate of hydration versus time for common cements reflects the proper setting and early hardening during the first days after mixing with water (two or three peaks and the induction period between them). The aim of measurements presented in this work was to show the course of heat evolution curve and the heat evolved values, equivalent to the acceleration/retardation of hydration, in case of the pastes produced from Portland cement and the carbonate additives mixed in variable proportions, as well as to verify the results by other methods. The rate of heat evolution accompanying cement paste hydration, total heat evolved, conductivity of hydrating suspension and rheological (flow) properties versus time are modified by the fine grained carbonate additives. This is due to the hypothetical nucleating effect of limestone and dolomite.

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“…The effects of limestone have been observed to alter aspects of the cement performance through the proposed mechanisms of dilution, the filler effect (particle packing), and nucleation (4,6,(17)(18)(19)(20)(21)(22)(23). Many authors have observed that these mechanisms affect the hydration of the cement, subsequently modifying the performance of the overall system (4,6,(17)(18)(19)(20)(21)(22)(23)(24)(25)(26). It is important to note that these mechanisms are interrelated and act simultaneously, influencing many of the same parameters of the system.…”

Section: Mechanisms Associated With Limestone Replacements In Cementmentioning

confidence: 99%

Performance of Portland Limestone Cements: Cements Designed to Be More Sustainable That Include up to 15% Limestone Addition

Barrett¹

2013

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ACKNOWLEDGMENTSThis work was conducted in the Charles Pankow Concrete Materials Laboratory at Purdue University. As such, the authors gratefully acknowledge the support which has made this laboratory and its operation possible.The authors would like to thank Buzzi Unicem, Holcim, Lafarge, Lehigh Hanson, and Omya for graciously providing the cementitious materials for this research. JOINT TRANSPORTATION RESEARCH PROGRAMThe Joint Transportation Research Program serves as a vehicle for INDOT collaboration with higher education institutions and industry in Indiana to facilitate innovation that results in continuous improvement in the planning, design, construction, operation, management and economic efficiency of the Indiana transportation infrastructure. https://engineering.purdue.edu/JTRP/index_html Published reports of the Joint Transportation Research Program are available at: http://docs.lib.purdue.edu/jtrp/ NOTICEThe contents of this report reflect the views of the authors, who are responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views and policies of the Indiana Department of Transportation or the Federal Highway Administration. The report does not constitute a standard, specification or regulation. AbstractIn 2009, ASTM and AASHTO permitted the use of up to 5% interground limestone in ordinary portland cement (OPC) as a part of ASTM C150/AASHTO M85. When this project was initiated a new proposal was being discussed that would enable up to 15% interground limestone to be considered in ASTM C595/AASHTO M234 cement. This project was initiated to provide rapid feedback to INDOT for use in discussions regarding these specifications (this has become ASTM C595/AASHTO M234). PLC is designed to enable more sustainable construction which may significantly reduce the CO2 that is embodied in the built infrastructure while extending the life of cement quarries. The physical and chemical properties of the cementitious materials used in this study were examined. PLC is typically a finer cement (10 to 30% Blaine fineness) with a reduction in the coarse clinker particles (>20µm) and an increase in fine particles which are primarily limestone. Isothermal calorimetry and chemical shrinkage results imply that these PLC materials have a similar or slight greater reaction and would be able to be used interchangeably with OPC in practice as it relates to the rate of reaction. The PLC mortars exhibited relatively similar activation energies compared to the corresponding OPCs allowing the maturity method to be used by INDOT for both the PLC and OPC systems. The mechanical properties of OPC and PLC were generally similar with the PLC typically having slightly higher early age strengths but similar 28 day strengths. No significant change in drying shrinkage or restrained shrinkage cracking was observed for the PLC when compared with OPC (Barrett et al. 2013 In 2009, ASTM and AASHTO permitted the use of up to 5% interground limestone in ordinary portland ceme...

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Chemical shrinkage of cement pastes and mortars at very early age: Effect of limestone filler and granular inclusions

Cited by 139 publications

References 21 publications

Compressive strength and shrinkage of mortar containing various amounts of mineral additions

Compressive strength and shrinkage of mortar containing various amounts of mineral additions

Application of calorimetry as a main tool in evaluation of the effect of carbonate additives on cement hydration

Performance of Portland Limestone Cements: Cements Designed to Be More Sustainable That Include up to 15% Limestone Addition

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