Details:

Alternative Title:
Performance of portland limestone cements : cements designed to be more sustainable that include up to 15 percent limestone addition
Creators:
Barrett, Timothy J. ; Sun, Hongfang ; Weiss, W. Jason
Barrett, Timothy J. ; Sun, Hongfang ; Weiss, W. Jason Less -
Corporate Creators:
Purdue University. Joint Transportation Research Program
Corporate Contributors:
United States. Federal Highway Administration
Subject/TRT Terms:
[+]
Air Voids Chemical Properties Limestone Physical Properties Portland Cement Shrinkage Sustainable Development
Publication/ Report Number:
FHWA/IN/JTRP-2013/29
Resource Type:
Tech Report
Geographical Coverage:
Indiana
Corporate Publisher:
Indiana. Dept. of Transportation
Abstract:
In 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). The PLC has similar volumes of permeable voids as the OPC. The

chloride diffusion coefficients in the PLC systems may range from 0 to 30% higher than the OPCs. The PLC showed synergistic benefits

when paired with fly ash. Based on the available literature and available testing results INDOT could consider PLC, as specified in

accordance with ASTM C‐595/AASHTO M 240, to be a suitable option for use in INDOT concrete applications.


Format:
PDF
Funding:
SPR-3611
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:efef95989fd4da96fa3591646026e86c4b8af67f88f90473b775c08da7aa6e5e
Download URL:
https://rosap.ntl.bts.gov/view/dot/27737/dot_27737_DS1.pdf
File Type:

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