A discussion of the paper “Thaumasite formation in Portland–limestone cement pastes” by S.A. Hartshorn, J.H. Sharp and R.N. Swamy

2001 ◽  
Vol 31 (3) ◽  
pp. 511-512 ◽  
Author(s):  
John Bensted ◽  
Juliet Munn
Keyword(s):  
Cement Pastes ◽  
Portland Limestone Cement ◽  
Limestone Cement

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

2011 ◽  
Vol 343-344 ◽  
pp. 322-326 ◽  
Author(s):  
Pailyn Thongsanitgarn ◽  
Watcharapong Wongkeo ◽  
Sakprayut Sinthupinyo ◽  
Arnon Chaipanich
Keyword(s):  
Compressive Strength ◽  
Portland Cement ◽  
Fine Particles ◽  
Setting Time ◽  
Dilution Effect ◽  
Limestone Powder ◽  
Cement Pastes ◽  
Consistency Results ◽  
Portland Limestone Cement ◽  
Limestone Cement

In this study limestone powders with different particle sizes of 5, 10 and 20 μm were used to replace a part of Portland cement in different replacement levels to produce Portland-limestone cement pastes. The percentages of limestone replacement are 0, 5, 7.5, 10, 12.5, 15 and 20% by weight. The effect of fineness and the amount of limestone powders on compressive strength and setting time are investigated. It has been established that limestone replacement causes reduce the compressive strength due to the dilution effect, but it can reduce energy consumption and CO2 emission in cement manufacturing. The fineness of limestone powder used has influence on the observed compressive strength values. From the standard consistency results, it seems that limestone has no effect on water requirement compared to Portland cement. Moreover, the increase in level of fine particles would require much water. Both initial and final setting times were decreased with an increase in the amount of limestone. Furthermore, at the same level replacement, the cement pastes using 5 μm of limestone show lower setting time than those using 10 and 20 μm, respectively.

Thaumasite formation in Portland-limestone cement pastes

1999 ◽  
Vol 29 (8) ◽  
pp. 1331-1340 ◽  
Author(s):  
S.A. Hartshorn ◽  
J.H. Sharp ◽  
R.N. Swamy
Keyword(s):  
Cement Pastes ◽  
Portland Limestone Cement ◽  
Limestone Cement

scholarly journals Mechanical and Durability Properties of Portland Limestone Cement (PLC) Incorporated with Nano Calcium Carbonate (CaCO3)

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 905 ◽  
Author(s):  
Lochana Poudyal ◽  
Kushal Adhikari ◽  
Moon Won
Keyword(s):  
Calcium Carbonate ◽  
Environmental Sustainability ◽  
Green Infrastructure ◽  
Durability Properties ◽  
Portland Limestone Cement ◽  
Global Environmental ◽  
Depth Study ◽  
Series Of Experiments ◽  
Limestone Cement ◽  
New Generation

Despite lower environmental impacts, the use of Portland Limestone Cement (PLC) concrete has been limited due to its reduced later age strength and compromised durability properties. This research evaluates the effects of nano calcium carbonate (CaCO3) on the performance of PLC concrete. The study follows a series of experiments on the fresh, hardened, and durability properties of PLC concrete with different replacement rates of nano CaCO3. Incorporation of 1% nano CaCO3 into PLC concrete provided the optimal performance, where the 56 days compressive strength was increased by approximately 7%, and the permeability was reduced by approximately 13% as compared to Ordinary Portland Cement (OPC) concrete. Further, improvements were observed in other durability aspects such as Alkali-Silica Reaction (ASR) and scaling resistance. Additionally, nano CaCO3 has the potential to be produced within the cement plant while utilizing the CO2 emissions from the cement industries. The integration of nanotechnology in PLC concrete thus will help produce a more environment-friendly concrete with enhanced performance. More in-depth study on commercial production of nano CaCO3 thus has the potential to offer a new generation cement—sustainable, economical, and durable cement—leading towards green infrastructure and global environmental sustainability.

Durability performance of Portland limestone cement mortar containing butyl and zinc stearate admixtures

2021 ◽  
Vol 54 (2) ◽  
Author(s):  
Athanasios Malakopoulos ◽  
Manolis Chatzigeorgiou ◽  
Nikos Boukos ◽  
Athanasios Salifoglou
Keyword(s):  
Cement Mortar ◽  
Zinc Stearate ◽  
Portland Limestone Cement ◽  
Limestone Cement ◽  
Durability Performance
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