Microstructural and mechanical properties study of the curing process of self-compacting concrete

Aparicio, S.; Martínez-Ramírez, S.; Ranz, Javier; Fuente, José Vicente; Hernández, Melchor G.

doi:10.1016/j.matdes.2016.01.067

Cited by 12 publications

(6 citation statements)

References 22 publications

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“…The curing method affects many properties of the cementitious composites directly. In addition to the curing method, curing time and temperature also affect the properties of the cementitious systems directly (Neupane, Sriravindrarajah, Baweja & Chalmers, 2015;Turuallo & Soutsos, 2015;Aparicio et al, 2016;Kocab, Kucharczykova, Misak, Zitt & Kralikova, 2017;Mostefinejad, Nikoo & Hosseini, 2016;Nasir, Al-Amoudi & Maslehuddin, 2017;Orosz, Hedlund & Cwirzen, 2017).…”

Section: Introductionmentioning

confidence: 99%

Effect of curing conditions during the first 24 hours after casting on the properties of mortar mixtures

Mardani‐Aghabaglou

Özen

Altun

2020

rdlc

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As it is well known, the curing method directly affects many properties of cementitious composites. In previous studies, the effect of different curing conditions on the properties of the cementitious systems has been generally investigated in the period after first 24 hours after casting. However, there are not many studies in the literature related to the effects of curing conditions on the specimens kept in mold during 24 hours after casting. In this study, strength development, ultrasonic pulse velocity (UPV) and water absorption capacity of mortar specimens subjected to steam-curing at different temperatures during keeping in mold for the first 24 hours after production were compared. In this regard, all mortar specimens were exposed to curing in a steam-curing cabin at 95% constant relative humidity (RH) under 5 different temperatures such as 20, 35, 50, 65 and 80˚C for the first 24 hours after the specimens were placed into the molds. Afterwards, the specimens were removed from the molds and cured in water conformed to the standard until the testing day. In this context, the water-cement ratio, sand-binder and slump-flow value of all mortar mixtures were kept constant as 0.485, 2.75, 25±2 cm, respectively. As a result, the application of steam-curing at high temperature for the first 24 hours positively affected the 1-day compressive strength and UPV values of the mixtures, while the 3,7 and 28-day compressive strength, UPV values and the 28-day water absorption capacity of mixtures were adversely affected.

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Section: Introductionmentioning

confidence: 99%

Effect of curing conditions during the first 24 hours after casting on the properties of mortar mixtures

Mardani‐Aghabaglou

Özen

Altun

2020

rdlc

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“…where μ r (ε) denotes the mean plastic variable and g and h denote the parameters relative to the coupling of damage and plasticity in the material. By substituting Equations (14b) into (16), the relationship between the mean plastic variable μ r (ε) and total strain ε is formulated as follows:…”

Section: E Analytical Model Of Sccmentioning

confidence: 99%

“…However, during the mechanical modelling of the materials, the stochastic constitutive relationship is able to characterize the randomness of material's mechanical behaviors, e.g., the different nonlinearity stress-strain responses exhibited in independent samples of same material. Concretely, for SCC, the causes for such randomness can be mainly attributed to its complex inhomogeneous microstructure, due to the irregular shape, random size and distribution of aggregates [14], the sedimentation of cement particles [15], the accumulation of pore water [15], the curing conditions-induced undetermined hydration [16], the different location of the concrete in the structures [17], and the varied skill of the workers [10]. Although SCC generally possesses a more homogeneous microstructure with a lower water accumulation around aggregated and a lower porosity in the interfacial transition zone (ITZ) than that of the normally vibrated concrete (NVC) [5,14,18], the stochastic constitutive relationship is still necessary to be taken into account during relevant designing and analyzing process.…”

Section: Introductionmentioning

confidence: 99%

Stochastic Constitutive Relationship of Self-Compacting Concrete under Uniaxial Compression

Xiao

Shan

et al. 2018

Advances in Civil Engineering

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Experimental investigations on self-compacting concrete (SCC) under uniaxial monotonic and cyclic compression taking into account the stochastic constitutive relationship were reported and conducted. By introducing a practical method on plasticity characterization into the fiber bundle-plastic chain model, a new constitutive model based on the statistic damage approach for describing the stochastic mechanical responses of SCC under uniaxial compression was proposed. The comparison between the experimental results and the predictions demonstrated that the proposed model was able to characterize the salient features for SCC under both uniaxial monotonic and cyclic compression. Furthermore, the stochastic evolution (SE) of SCC under uniaxial compression and a comparison between the SCC and normally vibrated concrete (NVC) in certain aspects were analyzed and discussed; it was concluded that the stochastic constitutive relationship of SCC under compression can be understood by a media process of transition from microscale to macroscale.

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“…The rubber material, which is known as organic polymer elastomeric material, is often sensitive to curing temperature and curing pressure and filled and reinforced by fillers 7 . The changes of the physical and mechanical properties of silicone rubber materials with different composite reinforcing fillers or in the different curing conditions were studied by many researchers 8–26 . For example, Liu et al 27 studied the effects of nano boron nitride as a filler of high temperature vulcanized silicone rubber on the thermal diffusivity, electrical conductivity, electrical breakdown strength, mechanical properties, dielectric properties, and hydrophobicity properties.…”

Section: Introductionmentioning

confidence: 99%

Effects of composite reinforcing filler, vulcanizing temperature, and pressure on mechanical properties of gasket material for proton exchange membrane fuel cells

Hou

Yin

et al. 2022

J of Applied Polymer Sci

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Gasket is one of the key components in proton exchange membrane fuel cells (PEMFCs), and the performance of the gasket can directly affect the durability and electrochemical performance of the PEMFCs. In this paper, the silicone rubber material, which is being considered as gasket material for PEMFC, was fabricated with different composite reinforcing fillers at different vulcanizing temperatures under different vulcanizing pressures. Effects of the composite reinforcing fillers (i.e., gas-phase SiO 2 and nano-CaCO 3 ), vulcanizing temperatures, and pressures on mechanical properties of the silicone rubber material were investigated. The tensile, hardness measurement, compression set, and compression stress relaxation experimental results show that the mass ratios of the gas-phase SiO 2 to nano-CaCO 3 , curing temperatures, and pressures had a significant impact on the mechanical properties of PEMFC gasket materials. It is found that the silicone rubber material cured at a vulcanization temperature of 160 C and a vulcanization pressure of 10 MPa had good compression mechanical properties compared to the materials cured at the other curing temperatures and curing pressures. Orthogonal test results show that, when mass ratio of the gas-phase SiO 2 to nano-CaCO 3 was 25:20, the silicone rubber material cured at the curing temperature of 160 C and under the curing pressure of 10 MPa had good compressive stress relaxation performance in this work.

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Microstructural and mechanical properties study of the curing process of self-compacting concrete

Cited by 12 publications

References 22 publications

Effect of curing conditions during the first 24 hours after casting on the properties of mortar mixtures

Effect of curing conditions during the first 24 hours after casting on the properties of mortar mixtures

Stochastic Constitutive Relationship of Self-Compacting Concrete under Uniaxial Compression

Effects of composite reinforcing filler, vulcanizing temperature, and pressure on mechanical properties of gasket material for proton exchange membrane fuel cells

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