Comprehensive tests and quasi-brittle fracture modeling of light-weight foam concrete with expanded clay aggregates

Lu, Yao; Hu, Xiao; Yang, Xiaofa; Xiao, Yiqiang

doi:10.1016/j.cemconcomp.2020.103822

Cited by 34 publications

(6 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Angelin et al (2020) [ 162 ] evaluated the packing of lightweight concrete containing expanded clay and rubber as aggregates, obtaining strength at 28 days of 58.5 MPa. Lu et al (2021) [ 163 ] also obtained compressive strength results compatible with HPC using expanded clay aggregates. However, Garcia et al (2021) [ 164 ] reported that the use of expanded clay in high-performance concretes is problematic, due to defects arising from the calcination of these aggregates.…”

Section: Classic Components Used For Hpc and Uhpc Productionmentioning

confidence: 93%

Materials for Production of High and Ultra-High Performance Concrete: Review and Perspective of Possible Novel Materials

Marvila¹,

Azevedo²,

Matos

et al. 2021

Materials

106

View full text Add to dashboard Cite

This review article proposes the identification and basic concepts of materials that might be used for the production of high-performance concrete (HPC) and ultra-high-performance concrete (UHPC). Although other reviews have addressed this topic, the present work differs by presenting relevant aspects on possible materials applied in the production of HPC and UHPC. The main innovation of this review article is to identify the perspectives for new materials that can be considered in the production of novel special concretes. After consulting different bibliographic databases, some information related to ordinary Portland cement (OPC), mineral additions, aggregates, and chemical additives used for the production of HPC and UHPC were highlighted. Relevant information on the application of synthetic and natural fibers is also highlighted in association with a cement matrix of HPC and UHPC, forming composites with properties superior to conventional concrete used in civil construction. The article also presents some relevant characteristics for the application of HPC and UHPC produced with alkali-activated cement, an alternative binder to OPC produced through the reaction between two essential components: precursors and activators. Some information about the main types of precursors, subdivided into materials rich in aluminosilicates and rich in calcium, were also highlighted. Finally, suggestions for future work related to the application of HPC and UHPC are highlighted, guiding future research on this topic.

show abstract

Section: Classic Components Used For Hpc and Uhpc Productionmentioning

confidence: 93%

Materials for Production of High and Ultra-High Performance Concrete: Review and Perspective of Possible Novel Materials

Marvila¹,

Azevedo²,

Matos

et al. 2021

Materials

106

View full text Add to dashboard Cite

show abstract

“…Lightweight microporous concrete is formed by mixing, pouring, and curing [ 33 ]. The main properties of foamed concrete typically include the following five points [ 34 , 35 ]: Light weight: foamed concrete has a low density which typically ranges from 300 kg/m 3 to 1200 kg/m 3 . Good insulation performance: foamed concrete contains a large number of closed, uniform, and fine circular pores which contribute to its excellent insulation performance.…”

Section: Overview Of Thermal Insulation Materialsmentioning

confidence: 99%

“…Lightweight microporous concrete is formed by mixing, pouring, and curing [33]. The main properties of foamed concrete typically include the following five points [34,35]:…”

Section: Foam Concretementioning

confidence: 99%

Evolution Law of Structural Form and Heat Transfer Performance of Thermal Insulation System

Zhou,

Li,

Bao

et al. 2023

Materials

View full text Add to dashboard Cite

Building thermal insulation and energy conservation have become urgent problems in the field of civil engineering because they are important for achieving the goal of carbon neutralization. Thermal conductivity is an important index for evaluating the thermal insulation of materials. To study the influence of different porosity levels on the thermal conductivity of materials, this paper established a random distribution model using MATLAB and conducted a comparative analysis using COMSOL finite element software and classical theoretical numerical calculation formulas. The thermal conductivity of composite materials was determined based on a theoretical calculation formula and COMSOL software simulations, and the theoretical calculation results and simulation results were compared with the measured thermal conductivity of the composites. Furthermore, the influence of the width of the gaps between the materials on the heat transfer process was simulated in the fabricated roof structure. The results showed the following: (1) The thermal conductivity values calculated using the Zimmerman model were quite different from those calculated using the Campbell-Allen model and those calculated using the COMSOL software; (2) The thermal conductivity values calculated using the theoretical calculation formula were lower than the measured data, and the maximum relative error was more than 29%. The COMSOL simulation results were in good agreement with the measured data, and the relative error was less than 5%; (3) When the gap width was less than 60 mm, it increased linearly with the heat transfer coefficient. The heat transfer coefficient increased slowly when the gap width was greater than 60 mm. This was mainly due to the thermal bridge effect inside the insulation system. Based on these research results, a thermal insulation system was prepared in a factory.

show abstract

“…Reducing the total self-weight of any structure is an important key in many structural designs. There are several advantages of this self-weight reduction including but not limited to improving the structural behaviour to seismic loads and reducing the total cost of the structure [1][2][3]. Decreasing the total weight of the structural elements can be achieved by different methods such as using thin concrete sections with high concrete strength or reducing the specific gravity of the concrete.…”

Section: Introduction Amentioning

confidence: 99%

Evaluation of lightweight Concrete Core Test Including Steel Bars

Goaiz

Jabir

Abdulrehman

et al. 2023

IJE

View full text Add to dashboard Cite

In many steel reinforced concrete members, steel bars are not avoidable during concrete core drilling and the presence of these steel bars have a direct impact on the results of this test. This study aims to examine the effect of steel bars presence on the test results of recycled aggregate lightweight concrete (LWC) cores. For the purpose, one lightweight concrete mix was made with a total number of 48 concrete cores were taken from a slab having the dimensions of 1 m width, 1.5 m length and 0.15m thickness. Each core has the dimensions of 90 mm in diameter and 150 mm in height. Three different sizes of steel bars (12, 16 and 20 mm) were used in six different locations (25, 45 and 65 mm) from the base of the core and (15 and 30 mm) from the center line of the core. A recycled crashed clay brick (CCB) was used as an alternative to the coarse aggregate. Compare to the density of the normal concrete (2400 kg/m 3 ), the LWC was able to achieve nearly 20% reduction of the total weight by fully replacing of normal aggregate with CCB. It has been found that the presence of the steel increases the compressive strength of the LWC cores. This effect is more noticeable when the location of the steel bar is near to the midheight or the centerline of the concrete core. Also, the influence of the steel bar diameter has increased by increasing the size of the steel bar.

show abstract

Comprehensive tests and quasi-brittle fracture modeling of light-weight foam concrete with expanded clay aggregates

Cited by 34 publications

References 30 publications

Materials for Production of High and Ultra-High Performance Concrete: Review and Perspective of Possible Novel Materials

Materials for Production of High and Ultra-High Performance Concrete: Review and Perspective of Possible Novel Materials

Evolution Law of Structural Form and Heat Transfer Performance of Thermal Insulation System

Evaluation of lightweight Concrete Core Test Including Steel Bars

Contact Info

Product

Resources

About