Self-curing concrete: Water retention, hydration and moisture transport

El-Dieb, Amr S.

doi:10.1016/j.conbuildmat.2006.02.007

Cited by 121 publications

(35 citation statements)

References 8 publications

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“…For each type of transport property test, two or more specimens from the same mixing design were tested to ensure the statistical reliability of the test results. 23). The specimens used were 10 mm thick cut from the middle of a 50 9 50 9 50 mm cubic sample.…”

Section: Sample Preparationmentioning

confidence: 99%

Transport Properties of Carbon-Nanotube/Cement Composites

Han

Yang

Shi

et al. 2012

J. of Materi Eng and Perform

128

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This paper preliminarily investigates the general transport properties (i.e., water sorptivity, water permeability, and gas permeability) of carbon-nanotube/cement composites. Carboxyl multi-walled carbon nanotubes (MWNTs) are dispersed into cement mortar to fabricate the carbon nanotubes (CNTs) reinforced cement-based composites by applying ultrasonic energy in combination with the use of surfactants (sodium dodecylbenzene sulfonate and sodium dodecyl sulfate). Experimental results indicate that even at a very small dosage the addition of MWNTs can help decrease water sorptivity coefficient, water permeability coefficient, and gas permeability coefficient of cement mortar, which suggests that CNTs can effectively improve the durability properties of cement-based composites.

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Section: Sample Preparationmentioning

confidence: 99%

Transport Properties of Carbon-Nanotube/Cement Composites

Han

Yang

Shi

et al. 2012

J. of Materi Eng and Perform

128

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“…All studies found in literature regarding measurements of the internal RH of concrete with non-destructive methods involve the assessment of the RH of the air contained in a given material macro-pore, using relative humidity sensors (Andrade et al 1999;El-Dieb 2007;Jiang et al 2006;Kim and Lee 1999;Grasley 2002;Lee et al 2011;Ryu et al 2011;Ekaputri et al 2010;Grasley et al 2006b;Zhang et al 2009;Chang and Hung 2012;Zhang et al 2012b;Nilsson and Åhs 2010). The following Sections provide a brief description of the measurement systems used in the scope of this research work.…”

Section: General Remarksmentioning

confidence: 99%

Hygrometric Assessment of Internal Relative Humidity in Concrete: Practical Application Issues

Granja

Azenha

Sousa

et al. 2014

ACT

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The use of embedded relative humidity (RH) sensors for assessing the internal humidity in concrete is widely spread, dully backed by existing standards. Even though the approaches adopted in the literature seem to have several differences between each other, few or none research works were found to focus on the comparison of performance of sensors and methods for RH measurement. In view of this, several sets of experiments comparing the performances of different sensors and monitoring procedures will be presented in this paper, discussing the main findings and providing recommendations for the strategies to be adopted in what concerns the measurement technique. The main points addressed in this work are: (i) comparisons between readily available systems for RH measurement in concrete, as well as custom measurement strategies reported in the literature; (ii) issues related to calibration procedures and re-calibration necessity; (iii) relevance of the existence of an interface porous material between the embedded sensor and the measurement spot in concrete; (iv) importance of the size of the embedment body into which the RH sensor is inserted; (v) equivalence of results obtained when the probe is constantly inserted into the embedment body, or placed inside it at discrete instants.

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“…The first concrete mix SC was self-curing concrete based on previous researches [5,19,6,20]. Samples were cast using ordinary Portland cement, crushed dolomite with a maximum nominal size of 12.5 mm, graded sand with a fineness modulus of 2.40, silica fume as 15% of cement content, super-plasticizer "Addicrete BVF" as 0.07% of cement content [20,6], chemical curing agent "Poly ethylene glycol PEG200" as 2% of cement content [5] and tap water for the first concrete mix. The second concrete mix CC is normally cured concrete mix with the same proportions of the self-curing concrete mix but without additional chemical curing agent "PEG200" to produce the possibility to compare between the both mixtures.…”

Section: Concrete and Test Samplesmentioning

confidence: 99%

“…curing "IC" system could be created by the introduction of a chemical curing agent du ring the mixing to reduce water evaporation in the concrete and make it effectively self-curing [3,2]. A feasibility of curing concrete by adding water-soluble chemicals during mixing that reduce water evaporation during setting and hardening of the concrete, making it self-curing, was discussed by several researchers [4,3,5,6]. The chemicals' abilities to reduce evaporation from solution and to improve water retention in hydrating Portland cement was monitored by measuring weightloss, X-Ray powder diffraction, and thermo-gravimetry.…”

Section: Introductionmentioning

confidence: 99%

Self-Curing Concrete under Sulfate Attack

Bashandy

2016

Archives of Civil Engineering

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1Self-curing concrete SC is a concrete type that can be cured without using any external curing regimes. Tt can perform by several methods such as using lightweight aggregate or chemical agents. In this research chemical curing agent is used to produce SC. This paper reports the resuJts of a research study conducted to evaluate the effect of su I fates on the performance of se! f-curing concrete compared Io ord in ary concrete. Samples are immersed in sodium sui fate Na2S04 sol uti on of 4% concentration. Results are measured in terms of compressive strength, tensile strength, flexural strength and mass loss. It was found that the rate of strength loss is noticed at ordinary concrete compared to SC concrete. Sulfate resistance is improved when using self-curing concrete. This improvement appears to be dependent on using a chemical curing agent.

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Self-curing concrete: Water retention, hydration and moisture transport

Cited by 121 publications

References 8 publications

Transport Properties of Carbon-Nanotube/Cement Composites

Transport Properties of Carbon-Nanotube/Cement Composites

Hygrometric Assessment of Internal Relative Humidity in Concrete: Practical Application Issues

Self-Curing Concrete under Sulfate Attack

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