Effect of Limestone Powders on Compressive Strength and Setting Time of Portland-Limestone Cement Pastes

Thongsanitgarn, Pailyn; Wongkeo, Watcharapong; Sinthupinyo, Sakprayut; Chaipanich, Arnon

doi:10.4028/www.scientific.net/amr.343-344.322

Cited by 34 publications

(18 citation statements)

References 8 publications

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“…3. A similar effect was observed by Thongsanitgarn et al [24] on incorporating fine limestone in the cement paste.…”

Section: Fig2 Effect Of Waste Addition On Water Of Consistency Of Csupporting

confidence: 83%

Usage of Porcelain Insulators Wastes in the Preparation of Cement Based Building Units

Salam

2019

IJEAT

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Porcelain electrical insulators manufactured from refractory ceramic materials have to pass stringent tests prior to final acceptance. This causes large amounts of wastes to be available at the plant premises representing a waste of material besides being an environmental threat. In the present work, porcelain wastes were crushed and ground to pass 40 mesh screen and used as partial sand replacement in cement mortar cubes as first step for possible use in concrete works. The effect of particle size and percent addition on water of consistency and setting time of cement paste and flow behavior of mortars and their compressive strength was investigated. The results showed that the substitution of sand by the waste moderately altered most of the properties but helped raising the mechanical strength

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“…3. A similar effect was observed by Thongsanitgarn et al [24] on incorporating fine limestone in the cement paste.…”

Section: Fig2 Effect Of Waste Addition On Water Of Consistency Of Csupporting

confidence: 83%

Usage of Porcelain Insulators Wastes in the Preparation of Cement Based Building Units

Salam

2019

IJEAT

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“…This was due to the fact that LSP are relatively soft and not strong enough to resist the pressure resulting from the denser microstructure resulting in crushing of microbes. Sand, being harder and coarser as compared to LSP, provides better cover in the denser microstructure as previously reported by Thongsanitgarn et al (2012).…”

Section: Compressive Strength Regainsupporting

confidence: 72%

Bio-inspired self-healing cementitious mortar using Bacillus subtilis immobilized on nano-/micro-additives

Khushnood

Din

Shaheen

et al. 2018

Journal of Intelligent Material Systems and Structures

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Bio-inspired self-healing strategies are much innovative and potentially viable for the production of healable cement mortar matrix. The present research explores the feasibility of gram-positive ''Bacillus subtilis'' microorganisms in the effective healing of nano-/micro-scale-induced structural and non-structural cracks. The main concern related to the survival of such microorganisms in cementitious environment has been successfully addressed by devising proficient immobilization scheme coherently. The investigated immobilizing media includes iron oxide nano-sized particles, micro-sized limestone particles, and milli-sized siliceous sand. The effect of induced B. subtilis microorganisms immobilized on nanomicro-additives was analyzed by the quantification of average compressive resistance of specimens (ASTM C109) and healing evaluation. The healing process was mechanically gauged by compressive strength regain of pre-cracked specimens after the healing period of 28 days. The pre-cracking load was affixed at 80% of ultimate compressive stress ''f 0 c '' while the age of pre-cracking was kept variable as 3, 7, 14, and 28 days to precisely correlate healing effectiveness as the function of cracking period. The healing mechanism was further explored by examining the healed micro-crack using field emission scanning electron micrographs, energy dispersive x-ray spectrographs, and thermogravimetry. The results revealed that B. subtilis microorganisms contribute extremely well in the improvement of compressive strength and efficient healing process of pre-cracked cement mortar formulations. The iron oxide nano-sized particles were found to be the most effective immobilizer for preserving B. subtilis microbes till the generation of cracks followed by siliceous sand and limestone particles. The micro-graphical and chemical investigations endorsed the mechanical measurements by evidencing calcite precipitation in the induced nano-/micro-cracks as a result of microbial activity.

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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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Effect of Limestone Powders on Compressive Strength and Setting Time of Portland-Limestone Cement Pastes

Cited by 34 publications

References 8 publications

Usage of Porcelain Insulators Wastes in the Preparation of Cement Based Building Units

Usage of Porcelain Insulators Wastes in the Preparation of Cement Based Building Units

Bio-inspired self-healing cementitious mortar using Bacillus subtilis immobilized on nano-/micro-additives

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

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