Effect of internal curing on behavior of high performance concrete: An overview

Saffar, Doha M. Al; Saad, Aymen J.K. Al; Tayeh, Bassam A.

doi:10.1016/j.cscm.2019.e00229

Cited by 35 publications

(23 citation statements)

References 58 publications

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“…In all the internally cured mixtures, there was a reduction in the strength resistance. This is contrary to the conclusion given by Saffar, Saad and Tayeh (2019), where the authors state that the internal curing should increase the strength resistance. However, their conclusion is based on experimentation with fine aggregates.…”

Section: Discussioncontrasting

confidence: 92%

Evaluation of internal curing effects on concrete

Castellanos

Rodríguez-Torres

2019

Ing. Inv.

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The objective of the present research was the evaluation of some fresh and hardenedstate properties of concretes, in which coarse aggregates were partially replaced by lightweight ones previously saturated, in percentages of 15% and 25 %. The lightweight aggregates were calcined clays and crushed clay bricks. In parallel, the effect of an internal curing agent composed of superabsorbent polymers (SAP) was evaluated. The properties evaluated in the fresh and hardenedstate of concretes with a/c of 0,30 were: slum, air content, density, compression resistance, modulus of elasticity, initial superficial absorption and chlorine resistance. Results showed the efficiency of crushed clay bricks as internal curing, as well as the need for deeper research on the use of the evaluated lightweight aggregate as internal curing aggregate in concrete. Results indicate that the crushed clay bricks and the internal curing agent fulfill the behavior expected, in terms of strength and durability. However, the evaluated lightweight aggregate produces a reduction in the resistance and durability of the concrete. The observed behavior in strength and durability is especially variable for the age of 180 days, compared with conventional concretes.

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Section: Discussioncontrasting

confidence: 92%

Evaluation of internal curing effects on concrete

Castellanos

Rodríguez-Torres

2019

Ing. Inv.

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“…Al Saffar et al [8] and Mechtcherine et al [38] recognized that the densities of high-performance concretes containing internal curing agents decrease at early ages, and they established that this reduction in densities might be due to the low densities of internal curing agents. However, some studies showed an increase in densities at later-ages and attributed this to the formation of a very dense microstructure at later stages.…”

Section: Resultsmentioning

confidence: 99%

“…Mass concrete structures face thermal shrinkage because of temperature differences between the surface of the concrete and the interior of the concrete, mainly due to dissipation of the heat of hydration [4]. The basic purpose of ICAs in HSMs and HSCs is to release stored water during the hydration process to delay rapid hydration and minimize leading interior temperatures [5,6,7,8]. Other than commonly-used ICAs, Moon et al [9] added slag with other supplementary cementitious materials (SCMs) to concrete to reduce the early heat release rates.…”

Section: Introductionmentioning

confidence: 99%

Effect of Saturated Tea Waste and Perlite Particles on Early Age Hydration of High-Strength Cement Mortars

et al. 2019

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The main purpose of this work is to study the effect of saturated black tea waste and perlite on controlling the rapid heat of hydration in high-strength cement mortars at early ages. Tea waste and perlite were investigated as internal curing agents in different mixes. Mortar specimens with two different sizes of tea waste and perlite particles with 1 and 3% by volume of cement were added in different mixes to find their effect on early age hydration. The rising interior temperature, setting times, and strength parameters were evaluated. Results showed that the mix specimens that contained 3% tea waste and perlite particles significantly delayed the hydration process by minimizing internal temperature and extended setting times of different specimens. However, their usage had a slightly adverse impact on compressive and flexural strengths. It was observed that the specimens made with coarser particles of tea waste and perlite were more helpful to control early age rapid hydration than the specimens made with finer particles, whereas the specimens made with finer particles had slightly higher strengths than the specimens made with coarser particles. Hence, the coarser particles are recommended to be used in high-strength mortars to mitigate the early age rapid heat of hydration.

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“…Internal Curing can reduce autogenous shrinkage and improve concrete quality. Internal curing is necessary for designing HPC, and conventional concrete with low water-cement ratio, when RA have been employed (Al Saffar, Al Saad, and Tayeh, 2019).…”

Section: Introductionmentioning

confidence: 99%

Effect of Supplementary Cementitious Material and Fine Recycled Aggregates on Shrinkage Properties of Self-Compacting Microconcrete

Larrañaga¹,

Tippareddygari²

2020

XV International Conference on Durability of Building Materials and Components. eBook of Proceedings

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An increase in the population has led to the progressive construction of infrastructures and buildings. This causes severe environmental problems, firstly high emissions of CO2 are caused in cement production; secondly, a high volume of construction and demolition waste is landfilled and thirdly, it is necessary to look for new, no natural resources for the production of construction materials. The objective of this work is to analyse the influence of fine recycled aggregates and high volumes of fly ash in the properties of high-performance self-compacting (SC) microconcrete. The experimental work presented in this paper was carried out in two phases. In phase 1, SC-microconcrete were produced with 100% of Portland cement, and natural sand was replaced by both mixed and ceramics recycled aggregates in 30% and 50%. In phase 2, SC-microconcretes were produced with the replacement of 50% of Portland cement by fly ash, and natural sand was replaced by both mixed and ceramics recycled aggregates in 30% and 50%. In each phase, the drying and autogenous shrinkage of all mortars was measured via their storage in a climate chamber after 24 hours of casting and the determining of properties during 90 days. In order to assess the influence of the shrinkage effect on the mechanical properties, the prismatic samples were also stored in a climatic chamber, and the compressive strength at several ages was determined in all of the SC mixtures. The results showed that the microconcretes produced employing mixed and ceramic fine aggregates achieved higher compressive strength and lower autogenous shrinkage. Although the C-N achieved the lowest drying shrinkage, the mixtures with 30% of CRA and MRA were found to have similar values. The employment of the CRA aggregates improved the drying shrinkage and compressive strength of the C-FAN mixture.

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Effect of internal curing on behavior of high performance concrete: An overview

Cited by 35 publications

References 58 publications

Evaluation of internal curing effects on concrete

Evaluation of internal curing effects on concrete

Effect of Saturated Tea Waste and Perlite Particles on Early Age Hydration of High-Strength Cement Mortars

Effect of Supplementary Cementitious Material and Fine Recycled Aggregates on Shrinkage Properties of Self-Compacting Microconcrete

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