Effect of Different Curing Regimes on Shrinkage and Strength Properties of Self-Consolidating Mortars Containing Silica Fume in Different Contents

Abstract:

The aim of this research is to study the effect of different curing regimes on shrinkage and strength properties of self-consolidating mortars (SCM) containing silica fume in different contents. Self-consolidating mortars, as new technology products, are especially preferred for use in architectural elements and the rehabilitation and repair of reinforced concrete structures. SCM can be used in precast architectural elements or cast in place repair of reinforced concrete structures. Therefore, investigation on the effects of different curing methods on key properties of SCMs can be beneficial. The shrinkage and strength properties of SCMs produced at different replacement ratios of silica fume (SF) with cement in different curing regimes were studied, at this paper. SCM mixes were prepared in constant water/powder ratio and cured in four different regimes including water curing (WC), accelerated water curing (AWC), air curing (AC) and aluminum tape sealing (AS). A polycarboxylate-based superplasticizer (SP) was added to the mixtures at different rates by mass of the cementitious materials to have appropriate flowability. Fresh mortars workability was determined using mini slump flow and mini V-funnel tests. All SCM specimens were tested and evaluated for compressive strength, flexural strength and shrinkage. It has been found that different curing regimes have considerable effects on both shrinkage and strength properties of SCM. It can be concluded that aluminum tape sealing and accelerated water curing can be used as effective and successful curing methods particularly where the SCM is used as a repair material or in architectural elements, respectively.

• Periodical: Applied Mechanics and Materials (Volumes 357-360)
• Pages: 1271-1276
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.357-360.1271
• Online since: August 2013
• Authors: Jamshid Esmaeili*, Jamil Kasaei
• Keywords: Curing Regimes, Self-Consolidating Mortars, Shrinkage, Silica Fume (SF), Strength Property

References

[1] L. Courard, A. Dairmont, X. Willem, C. Geers, R. Degeimbre, Repairing concretes with self-compacting concrete: testing methodology assessment, Proceedings of the First North American Conference on the Design and Use of Self-Consolidating Concrete, 2002, p.267.

[2] K.H. Khayat, R. Morin, Performance of self-consolidating concrete used to repair Parapet Wall in Montreal, Proceedings of the First North American Conference on the Design and Use of Self-Consolidating Concrete, 2002, p.475–481.

DOI: 10.1617/2912143624.001

[3] ASTM C 305-99. Standard Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency.

DOI: 10.1520/c0305-99

[4] EFNARC 2005, The European Guidelines for Self-Compacting Concrete: Specification, production and use, www. efnarc. org, 68 pp.

[5] ASTM C 348-02. Standard Test Method for Flexural Strength of Hydraulic-Cement Mortars.

[6] ASTM C 349-02. Standard Test Method for Compressive Strength of Hydraulic-Cement Mortars (Using Portions of Prisms Broken in Flexure).

DOI: 10.1520/c0349-18

[7] ASTM C 490. Use of Apparatus for the Determination of Length Change of Hardened Cement Paste, Mortar, and Concrete.

DOI: 10.1520/c0490_c0490m-08

[8] D.P. Bentz, G. Sant, W.J. Weiss. Early-age properties of cement-based materials: I. Influence of cement fineness, ASCE J. Mat. Civ. Eng. 20 (7) (2008) 502–508.

DOI: 10.1061/(asce)0899-1561(2008)20:7(502)