Overview of effects of internal curing agents on low water to binder concretes

Venkateswarlu, Kuruva; Deo, Shirish V.; Murmu, Meena

doi:10.1016/j.matpr.2020.03.479

Cited by 12 publications

(8 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, for the three curing conditions evaluated, all the mortar samples demonstrated a shrinkage over time as expected. These dimensional changes occurred because of factors such as moisture evaporation from the cementitious material, continuous hydration of the cement particles leading to self-dissection, and the surface water evaporation that causes the appearance of capillary pores, and resulted in shrinkage cracks [14].…”

Section: Dry Shrinkagementioning

confidence: 99%

“…One of the questions at the forefront of admixture research is to ensure higher water availability for internal curing procedures [13,14] in cement materials with low w/c ratios. Absorbent polymers such as hydrogels [15,16] allow for the gradual control of cement particle hydration because of their ability to absorb and retain water and release it later into the hydrating cementitious matrix.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Performance of cementitious mortars containing hydrogel–nanoclay hybrid nanocomposite

Filho,

de Moura,

Aouada

2024

J Sol-Gel Sci Technol

View full text Add to dashboard Cite

Cement-based composites comprise a binder matrix with or without aggregates. Hydration of cement is an exothermic reaction that releases considerable quantities of heat, causes drying shrinkage, and results in cracks that can compromise the performance of the structure. Hydrogels can help mitigate such cracking as their hydrophilic characteristics and 3D crosslinked structure enable them to absorb and directly release water into the cement matrix over time. The aim of this study is to synthesize and analyze the effect of adding hybrid nanocomposite hydrogels with different concentrations (0, 10, and 20% w/v) of Cloisite-Na + nanoclay in their fresh and hardened cement mortar states. The hydrogels were synthesized via free radical polymerization, and four cementitious mortar samples (M, M0, M10, and M20), were prepared with 1:2.16, 0.40 water/cement and 0.50% presoaked hydrogel (wt./wt cement ) ratios.The results demonstrated that the density of all the mortars in the fresh state was ~ 2.16 ± 0.01 g.cm − 3 , but a decreasing trend was observed that could attributed to the increase of air incorporation into the mortar. At 28 days, the results indicated that the hydrogel with 20% Cloisite-Na + was the most e cient, causing a reduction of ~ 4.41% in water absorption by the mortar. For all the three curing conditions considered, all mortars demonstrated considerable shrinkage over time. However, the controlled curing indicated that M20 mortars demonstrated 30.5% less shrinkage compared to the control sample. Thus, the results indicate that the mortars containing hydrogel demonstrate satisfactory behavior in both the fresh and hardened state, highlighting its e ciency as a curing agent.

show abstract

Section: Dry Shrinkagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance of cementitious mortars containing hydrogel–nanoclay hybrid nanocomposite

Filho,

de Moura,

Aouada

2024

J Sol-Gel Sci Technol

View full text Add to dashboard Cite

show abstract

“…Saturated LWA can desorb water when there is no water for hydration in the surrounding concrete layers. Thanks to this, ITZ between the aggregates and binding phase enhances due to proper hydration and denser microstructure with increased CSH amount (Venkateswarlu et al, 2020;Kamal et al, 2018;Nie et al, 2018;Henkensiefken et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Effect of aggregate size and polyethylene sheet curing on me-chanical and microstructural properties of lightweight expanded clay aggregate concrete

Toprak¹,

Karakurt²,

Güneş³

2022

rdlc

View full text Add to dashboard Cite

This study assessed the effect of lightweight expanded clay aggregate (LECA) grain size and curing with polyethylene concrete curing film (PCCF) on microstructure, interfacial transition zone (ITZ), and compressive strength of structural lightweight aggregate concrete (LWAC) produced with two different Dmax (16 or 22.4 mm). To this end, 2 series of normal weight aggregate concretes (NWAC) and 6 series of LWAC incorporating 40% by vol. unprewetted LECA having (0-3, 3-8, or 8-16 mm) grain sizes were evaluated by using unit weight, compressive strength tests at 1, 7, and 28 days and SEM-EDX observations. Preventing the moisture loss from fresh concrete through PCCF curing had positive effects on compressive strength up to 14 and 9% for 1 and 28 days respectively. Shell thickness of LECA considerably increased with the decrease in LECA grain size. Thus, the compressive strength of LECA and LWAC increased by the decrease in LECA grain size. LWAC containing 0-3 mm LECA, achieved up to 21% higher compressive strength to weight ratio compared with the NWAC with the aid of the pozzolanic reactivity of fine LECA particles.

show abstract

“…They highlighted the importance of precise mix design and proportioning in achieving desired flow-ability and viscosity for effective self-placement and compaction. Through varied mix designs and fly ash levels, their research emphasized balanced approaches that optimize SCC with fly ash, enhancing its construction efficacy [21].…”

Section: Introductionmentioning

confidence: 99%

Optimizing flow, strength, and durability in high-strength self-compacting and self-curing concrete utilizing lightweight aggregates

Kadhar,

Gopal,

Sivakumar

et al. 2024

Matéria (Rio J.)

View full text Add to dashboard Cite

This comprehensive study undertaken to investigate the properties and performance of M60 grade selfcompacting and self-curing concrete mix designs. The research involved an in-depth analysis of various concrete compositions labeled as M1 to M16, each with specific aggregate combinations and percentages. The primary focus was on assessing critical properties such as flow-ability, mechanical, durability and micro structural properties. The mix labeled as M6, featuring a balanced incorporation of fine aggregate alternatives (FAA) and natural coarse aggregates (NCA), exhibited noteworthy behavior in terms of the evaluated properties. This indicated the potential advantages of judiciously combining different types of aggregates to achieve desired concrete characteristics. The research underscored the critical role of aggregate selection and substitution in determining the overall durability, strength, and structural performance of M60 grade concrete. These findings contribute to an improved understanding of optimizing concrete mix designs for achieving enhanced mechanical properties, micro structural and long-term structural sustainability. The mix M12 is more superior compared to all the mix in the form of fresh concrete properties, mechanical properties and durability properties of concrete. This study's outcomes have implications for the construction industry, offering valuable insights into formulating concrete blends tailored for specific structural requirements and desired performance outcomes.

show abstract

Overview of effects of internal curing agents on low water to binder concretes

Cited by 12 publications

References 49 publications

Performance of cementitious mortars containing hydrogel–nanoclay hybrid nanocomposite

Performance of cementitious mortars containing hydrogel–nanoclay hybrid nanocomposite

Effect of aggregate size and polyethylene sheet curing on me-chanical and microstructural properties of lightweight expanded clay aggregate concrete

Optimizing flow, strength, and durability in high-strength self-compacting and self-curing concrete utilizing lightweight aggregates

Contact Info

Product

Resources

About