Influence of content and maximum size of light expanded clay aggregate on the fresh, strength, and durability properties of self-compacting lightweight concrete reinforced with micro steel fibers

Nahhab, Ali H.; Ketab, Ali K.

doi:10.1016/j.conbuildmat.2019.117922

Cited by 74 publications

(34 citation statements)

References 22 publications

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“…As mentioned above, LWAC generally has a porous structure, particularly in materials with low density, with its permeability also being an important parameter in material durability [42,43]. It is well known that the high permeability of concrete contributes to accelerate the access for both water and other substances, which damages the concrete itself or the steel embedded in it [44,45].…”

Section: Introductionmentioning

confidence: 99%

Effect of different expanded aggregates on durability-related characteristics of lightweight aggregate concrete

Chung

Sikora

Kim

et al. 2021

Materials Characterization

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Section: Introductionmentioning

confidence: 99%

Effect of different expanded aggregates on durability-related characteristics of lightweight aggregate concrete

Chung

Sikora

Kim

et al. 2021

Materials Characterization

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“…Lightweight aggregates are 25–35% lighter than the conventionally used aggregates 19 . However, the strength properties of lightweight aggregates are also much lower than the conventional aggregates; due to this fact, cement composites utilizing lightweight aggregates generally achieve lower mechanical properties and densities 22 . Mechanical properties of lightweight aggregate concrete also depend on the desired density of the composite; decreasing the density reduces the mechanical properties of composite 23 .…”

Section: Introductionmentioning

confidence: 99%

Effects of carbon nanotubes on expanded glass and silica aerogel based lightweight concrete

Adhikary

Rudžionis

Tučkutė

et al. 2021

Sci Rep

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This study is aimed to investigate the effect of carbon nanotubes on the properties of lightweight aggregate concrete containing expanded glass and silica aerogel. Combinations of expanded glass (55%) and hydrophobic silica aerogel particles (45%) were used as lightweight aggregates. Carbon nanotubes were sonicated in the water with polycarboxylate superplasticizer by ultrasonication energy for 3 min. Study results show that incorporating multi-wall carbon nanotubes significantly influences the compressive strength and microstructural performance of aerogel based lightweight concrete. The addition of carbon nanotubes gained almost 41% improvement in compressive strength. SEM image of lightweight concrete shows a homogeneous dispersal of carbon nanotubes within the concrete structure. SEM image of the composite shows presence of C–S–H gel surrounding the carbon nanotubes, which confirms the cites of nanotubes for the higher growth of C–S–H gel. Besides, agglomeration of carbon nanotubes and the presence of ettringites was observed in the transition zone between the silica aerogel and cementitious materials. Additionally, flowability, water absorption, microscopy, X-ray powder diffraction, and semi-adiabatic calorimetry results were analyzed in this study.

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“…ese advantages enable SCC to be successfully used in confined areas and densely reinforcement elements [2][3][4]. However, SCC still has some disadvantages such as high brittle characteristics and high density, which would limit its broader application in civil engineering [5]. A possible solution to the problem is to partially or totally substitute natural aggregate with lightweight aggregate (LWA) to produce lightweight aggregate self-compacting concrete (LWASCC) [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics of Lightweight Aggregate Self‐Compacting Concrete by Impact Resonance Method

Zhang

Long

et al. 2021

Advances in Civil Engineering

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Understanding the dynamic behavior of Lightweight Aggregate Self-Compacting Concrete (LWASCC) is of importance to the safety of concrete structures serving in dynamic loading conditions. In this study, the fundamental dynamic properties of LWASCC with three types of LWA were investigated by the impact resonance method. Results show that the dynamic elastic and shear modulus generally decrease with the increase of LWA volume fraction, whereas three types of LWA exert limited influence on dynamic Poisson’s ratio. The dynamic elastic and shear modulus show good linear dependence upon compressive strength. The inclusion of three types of LWA significantly increases the damping ratio, indicating significantly enhanced damping capacity of LWASCC under dynamic loading conditions. The damping ratio of LWASCC is improved by 2.0%, 4.4%, and 2.9% when adding 1% (by volume) expanded clay, rubber, and expanded polystyrene, respectively. The compressive strength and dynamic performances of LWASCC are highly influenced by the intrinsic properties (elastic modulus, damping capacity, wettability, etc.) and geometrical characteristics (size, surface roughness, etc.) of LWA, as well as the LWA-matrix bonding capacity.

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Influence of content and maximum size of light expanded clay aggregate on the fresh, strength, and durability properties of self-compacting lightweight concrete reinforced with micro steel fibers

Cited by 74 publications

References 22 publications

Effect of different expanded aggregates on durability-related characteristics of lightweight aggregate concrete

Effect of different expanded aggregates on durability-related characteristics of lightweight aggregate concrete

Effects of carbon nanotubes on expanded glass and silica aerogel based lightweight concrete

Dynamic Characteristics of Lightweight Aggregate Self‐Compacting Concrete by Impact Resonance Method

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