Nano- and Microstructural Characterization of Portland Limestone Cement Pastes

Nadelman, Elizabeth; Freas, Dylan J.; Kurtis, Kimberly E.

doi:10.1007/978-3-319-17088-6_10

Cited by 10 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At first, this result is unexpected according to the low amount of C3A and C3S of CEM 1 compared to CEM 2 and CEM 3. But it can be explained due to an important addition of CaCO3 in CEM 1 that can accelerate the formation of hydrated products in cement pastes, because it acts as heterogeneous nucleation center between clinker grains, due to its fineness, as it has been explained by Taylor [25] and Nadelman et al [26]. The dehydration peak of gypsum around 180 °C is found for all cements at one hour of hydration.…”

Section: Effect Of Hydration Time On Dtg Testsmentioning

confidence: 76%

Mineralogical evolution of cement pastes at early ages based on thermogravimetric analysis (TG)

Gaviria

Borrachero

Payá

et al. 2017

J Therm Anal Calorim

View full text Add to dashboard Cite

Ordinary TGA and high-resolution TGA tests were carried out on three different Portland cements to study the phases present during the first day of hydration. Tests were run at 1, 6, 12, and 24 hours of hydration, in order to determine the phases at these ages. High-resolution TGA tests were used to separate decompositions presented in the 100-200 °C interval. The non-evaporable water determined by TGA was used to determine hydration degree for the different ages. The effect of particle size distribution (PSD) on mineralogical evolution was established, as well as the addition of calcite as mineralogical filler. Finer PSD and calcite addition accelerates the hydration process, increasing the hydration degree on the first day of reaction between water and cement. According to high-resolution TGA results it was demonstrated that ettringite was the only decomposed phase in the 100-200 °C interval during the first 6 hours of hydration for all studied cements. C-S-H phase starts to appear in all cements after 12 hours of hydration.

show abstract

Section: Effect Of Hydration Time On Dtg Testsmentioning

confidence: 76%

Mineralogical evolution of cement pastes at early ages based on thermogravimetric analysis (TG)

Gaviria

Borrachero

Payá

et al. 2017

J Therm Anal Calorim

View full text Add to dashboard Cite

show abstract

“…According to the FDOT Standard Specifications for Road and Bridge Construction ( 20 ), Section 346, the specified minimum strength for Class I pavement concrete is 20.7 MPa at 28 days. The required minimum strength is 29.0 MPa at 28 days.…”

Section: Resultsmentioning

confidence: 99%

“…According to the FDOT Standard Specifications for Road and Bridge Construction (20), Section 346, the specified minimum strength for Class I pavement The results indicated that the compressive strength of concrete cannot be enhanced by increasing the CPV. This means that when the BA technique is used to optimize the aggregate gradations, the strength of the concrete will not be affected.…”

Section: Compressive Strengthmentioning

confidence: 99%

“…PLC improved concrete sustainability through reductions of greenhouse gas emissions associated with cement production and by the lower embodied energy of the cement ( 17 ). Besides, previous studies provide the properties of the pavement concrete with PLC ( 5 , 20 ). Based on the previous research, PLC would be a suitable material to use in sustainable pavement concrete.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Developing Sustainable Pavement Concrete Mix Using Portland Limestone Cement and Blended Aggregates Techniques

Chung¹,

DeFord

Tia

et al. 2023

Transportation Research Record: Journal of the Transportation R

View full text Add to dashboard Cite

With the increasing price and carbon dioxide emission of cement comes the challenge of rigid pavement. One of the solutions to address this issue is minimizing the cementitious paste volume (CPV) of the concrete mix with the blended aggregates (BA) technique. This paper presents the effects of minimizing the CPV in Portland limestone cement (PLC) concrete with CPV reduction and BA application for Florida rigid pavement concrete. The findings indicated that reducing the CPV in the pavement concrete mix to some extent would not adversely affect the properties of the pavement concrete; the minimum CPV of PLC pavement concrete mixes can be reduced to 22.5% with no loss in the properties of fresh and hardened concrete. The other benefits of CPV reduction include low permeability and shrinkage strain. In summary, minimizing the CPV and utilizing the BA technique can be considered to design sustainable pavement concrete mixes with better pavement performance, lower materials costs, and lower global warming potential.

show abstract

“…Finally, the apparent increase in chemical shrinkage is also not likely due to the self‐desiccation of the chemical shrinkage specimens. Autogenous shrinkage is typically most rapid during the first 48 hours of hydration (corresponding to degrees of hydration of less than 50% for most of the cement pastes investigated), and in a separate study of the same cement pastes, the autogenous shrinkage was found to be less than 800 microstrain after 7 days of hydration. Assuming linear isotropic deformation, this is approximately equal to a volume reduction of less than 0.25%.…”

Section: Comparison To Powers’ Modelmentioning

confidence: 90%

Application of Powers’ model to modern portland and portland limestone cement pastes

Nadelman

Kurtis

2017

J Am Ceram Soc

Self Cite

View full text Add to dashboard Cite

Powers’ model is a simple approach for estimating the relative volumes of hydration products, porosity, and chemical shrinkage present in portland cement paste as a function of its starting water‐to‐cement ratio (w/c) and current degree of hydration. It forms an important link between cement composition, microstructure, and performance, necessary for modeling cement‐based systems. Previous researchers have adapted Powers’ model for inert fillers to illustrate their effects on the hydration, porosity, and chemical shrinkage of blended cements; however, it is well‐documented that limestone is not, in fact, an inert filler, but rather participates in cement hydration through both chemical and physical processes. This research experimentally investigates the applicability of Powers’ model to modern portland cements containing up to 15% by mass finely divided limestone. The results demonstrate that the modified Powers’ model is insufficient for predicting the influence of finely divided limestone additions on the chemical shrinkage of both ordinary portland cement pastes and portland limestone cement pastes. Possible explanations for the discrepancy are discussed and a plausible source is proposed.

show abstract

Nano- and Microstructural Characterization of Portland Limestone Cement Pastes

Cited by 10 publications

References 6 publications

Mineralogical evolution of cement pastes at early ages based on thermogravimetric analysis (TG)

Mineralogical evolution of cement pastes at early ages based on thermogravimetric analysis (TG)

Developing Sustainable Pavement Concrete Mix Using Portland Limestone Cement and Blended Aggregates Techniques

Application of Powers’ model to modern portland and portland limestone cement pastes

Contact Info

Product

Resources

About