01373668

Component

https://doi.org/10.3141/2290-01

http://scholar.google.com...ofka&publication_year=2012

The ongoing second SHRP 2 R06-B project entitled Evaluating Applications of Field Spectroscopy Devices to Fingerprint Commonly Used Construction Materials conducted at the University of Connecticut targets, among other objectives, the identification and quantification of chemical admixtures in portland cement concrete (PCC). The two specific objectives for the PCC study are (a) the applicability of portable infrared spectrometers for identification of the admixtures in fresh concrete under field conditions and (b) the feasibility of tracking interaction between hydration products during PCC setting. In the first phase of the study, four admixtures (air entrainer, retarder, accelerator, and superplasticizer) were tested to establish their chemical signature in the infrared and ultraviolet regions of the electromagnetic spectrum. The fingerprinting of the admixtures was performed with a portable attenuated total reflection (ATR) Fourier transform infrared spectrometer. The second phase concerned evaluating freshly mixed PCC samples prepared with each admixture separately in the amount prescribed by the manufacturer. Chemical changes in the PCC samples were tracked over the 6-h period by the portable ATR spectrometer. Quantitative analysis of the ATR spectra allowed for evaluating the effect of chemical admixtures on hydration activity in PCC.

01455586

12-1257

English

pp 1–9

2012

Transportation Research Record: Journal of the Transportation Research Board

9780309223300

Print

Figures; References; Tables

Admixtures; Hydration; Infrared spectroscopy; Portland cement concrete; Quantitative analysis; Spectrometers

Highways; Materials; Pavements; I32: Concrete

TRIS, TRB, ATRI

Feb 8 2012 5:00PM

• Can Soy Methyl Esters Improve Concrete Pavement Joint Durability?
• Development of Laboratory Testing Protocol for Rapid-Setting Cementitious Material for Airfield Pavement Repairs
• Development of Photocatalytic Pervious Concrete Pavement for Air and Storm Water Improvements
• Development of Precision Statement for Concrete Surface Resistivity
• Drying Shrinkage Behavior of Mortars Made with Ternary Blends
• Durability of Pavement Concretes Made with Recycled Concrete Aggregates
• Effect of Recycled Concrete Aggregate Properties on Mixture Proportions of Structural Concrete
• Effects of Deicing Salt Solutions on Physical Properties of Pavement Concretes
• Effects of Sample Preparation and Interpretation of Thermogravimetric Curves on Calcium Hydroxide in Hydrated Pastes and Mortars
• Field Evaluation of Ability of Photocatalytic Concrete Pavements to Remove Nitrogen Oxides
• Freeze–Thaw Durability and Salt Scaling Resistance Assessment of Portland Cement Concrete Composite Pavement
• Lowering the Carbon Footprint of Concrete by Reducing Clinker Content of Cement
• Performance of Concrete Incorporating Stone Industry Waste as Aggregates
• Performance of Slag Cement in Hydraulic Cement Concrete
• Predicting Cement–Admixture Incompatibilities with Cement Paste Rheology
• Quantification of Reduction of Nitrogen Oxides by Nitrate Accumulation on Titanium Dioxide Photocatalytic Concrete Pavement
• Reducing Curing Requirements for Pervious Concrete with a Superabsorbent Polymer for Internal Curing
• Reducing Set Retardation in High-Volume Fly Ash Mixtures with the Use of Limestone: Improving Constructability for Sustainability
• Strength and Transport Properties of Concretes Modified with Coarse Limestone Powder to Compensate for Dilution Effects
• Surface Resistivity Measurements Evaluated as Alternative to Rapid Chloride Permeability Test for Quality Assurance and Acceptance