Early hydration and setting of oil well cement

Journal Article · Thu Jul 15 00:00:00 EDT 2010 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2010.03.014· OSTI ID:21483638

Jie, Zhang; Weissinger, Emily A ^[1]; Peethamparan, Sulapha ^[2]

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1. Dept of Civil and Environmental Engineering, Princeton University, Princeton, NJ 08544 (United States)
2. Dept of Civil and Environmental Engineering, Clarkson University, Potsdam, NY 13699 (United States)

A broad experimental study has been performed to characterize the early hydration and setting of cement pastes prepared with Class H oil well cement at water-to-cement ratios (w/c) from 0.25 to 0.40, cured at temperatures from 10 to 60 {sup o}C, and mixed with chemical additives. Chemical shrinkage during hydration was measured by a newly developed system, degree of hydration was determined by thermogravimetric analysis, and setting time was tested by Vicat and ultrasonic velocity measurements. A Boundary Nucleation and Growth model provides a good fit to the chemical shrinkage data. Temperature increase and accelerator additions expedite the rate of cement hydration by causing more rapid nucleation of hydration products, leading to earlier setting; conversely, retarder and viscosity modifying agents delay cement nucleation, causing later setting times. Lower w/c paste needs less hydration product to form a percolating solid network (i.e., to reach the initial setting point). However, for the systems evaluated, at a given w/c, the degree of hydration at setting is a constant, regardless of the effects of ambient temperature or the presence of additives.

• OSTI ID: 21483638
• Journal Information: Cement and Concrete Research, Vol. 40, Issue 7; Other Information: DOI: 10.1016/j.cemconres.2010.03.014; PII: S0008-8846(10)00083-9; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0008-8846
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADDITIVES
AMBIENT TEMPERATURE
CEMENTS
HYDRATION
KINETICS
NUCLEATION
OILS
SHRINKAGE
TEMPERATURE RANGE 0273-0400 K
THERMAL GRAVIMETRIC ANALYSIS
VELOCITY
VISCOSITY
WATER
BUILDING MATERIALS
CHEMICAL ANALYSIS
GRAVIMETRIC ANALYSIS
HYDROGEN COMPOUNDS
MATERIALS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
SOLVATION
TEMPERATURE RANGE
THERMAL ANALYSIS