Predicting early-age temperatures of blended-cement concrete

doi:10.1680/coma.2006.159.4.163

Predicting early-age temperatures of blended-cement concrete

Authors: K. A. Paine ¹ ; R. K. Dhir ¹ ; L. Zheng ¹
Source: Proceedings of the ICE - Construction Materials, Volume 159, Issue 4, pages 163 –170 , ISSN: 1747-650X, E-ISSN: 1747-6518

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While some fields of civil engineering endeavour, and some materials, are heavily researched and published, the performance of construction materials and systems attracts far less interest and coverage
Construction Materials from the Institution of Civil Engineers is a recent addition to the suite of ICE Proceedings, and has been established with the aim of encouraging research and practical discussion in the field of performance of construction materials and systems.

Construction Materials addresses, among other subjects
The journal is edited by a distinguished editorial advisory panel and has a broad scope to embrace engineers working in both design and construction.

Construction Materials covers areas such as the procurement, specification, application, development, performance and evaluation of all materials used in construction and civil engineering. Coverage is also provided of the aspects which need to be taken into account when selecting materials: including embodied energy, environmental impact, service life, refurbishment, recycling and reuse.
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In this subject: Ground Engineering, Construction Materials, Innovation Research, Sitework, Environment
By this author: K. A. Paine , R. K. Dhir , L. Zheng

The advisability of controlling the temperature rise and fall in concrete at early age is well recognised, and the choice of an appropriate low-heat cement with suitable heat of hydration characteristics can assist in this control. This is particularly pertinent with respect to water-retaining and massive concrete structures, where the need to prevent early-age thermal cracking is paramount. Portland cement/ground granulated blast-furnace slag (PC/ggbs) or PC/fly ash cements are often used in these structures because of their low heat of hydration properties. This paper describes a study carried out to predict the early temperature rises for concrete containing different PC/ggbs and PC/fly ash cements. Current UK guidance normally requires knowledge of the proportion of ggbs or fly ash. Such information may not be available when using the recently published European standards for low-heat cements. To provide design data for these materials, cements just meeting the limiting heats of hydration for the low-heat and very low-heat classes were simulated. Temperature rises were predicted by a computer program that applied heat of hydration models to general heat flow theory with parameters to account for cement content, formwork type and section thickness.

Keywords: concrete technology & manufacture; codes of practice & standards; design methods & aids
Document Type: Research Article
DOI: 10.1680/coma.2006.159.4.163
Affiliations: 1: Concrete Technology Unit, Division of Civil Engineering, University of Dundee Scotland

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Predicting early-age temperatures of blended-cement concrete