Recycling of waste ceramic foams as fine aggregates in pervious concrete

Jiang, Congcong; Cheng, Xin

doi:10.1039/c9ra09070c

Cited by 6 publications

(2 citation statements)

References 25 publications

(27 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…VIPs are a new and efficient thermal insulation material based on the principle of vacuum thermal insulation [ 36 ]. They have been developed and studied in recent years, and they achieve thermal insulation and heat conduction by maximizing the vacuum in the board and filling it with core materials, which results in ideal thermal insulation effects for energy-saving purposes [ 37 ].…”

Section: Overview Of Thermal Insulation Materialsmentioning

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

Section: Overview Of Thermal Insulation Materialsmentioning

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

show abstract

“…When the content is less than 20%, the strength does not decrease obviously; However, when the content exceeds 30%, the strength decreases by about 20.2%. Jiang [8] used plate test to test the early crack resistance of recycled micro powder concrete products. The test conclusion is that when recycled micro powder is added to the concrete sample, the initial cracking time is effectively delayed, and the maximum crack width and length are also significantly shortened, which proves that recycled micro powder can significantly reduce the probability of early cracking of concrete.…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of recycled fine powder foam concrete

Feng¹

2021

MATEC Web Conf.

View full text Add to dashboard Cite

With the rapid development of the construction industry brought by the accelerated process of urbanization, the problem of random stacking and landfill of waste concrete can be seen everywhere, which seriously affects the environmental health. The secondary utilization of waste concrete as recycled aggregate has become a research hotspot. This paper mainly studies the influence of the cementing material system of recycled fine powder foam concrete on the water absorption performance of recycled fine powder foam concrete, and explores the feasibility of using recycled fine powder to prepare foam concrete. The experiment also used recycled fine powder instead of some cement to prepare foam concrete. The effects of the amount of recycled fine powder, the amount of hydrogen peroxide and the ratio of water to binder on the compressive strength, water absorption, thermal conductivity and microstructure of the foam concrete were studied. The results showed that the water absorption rate of recycled fine powder foam concrete increased with the increase of red brick powder content, but the water absorption rate gradually increased. When the content of hydrogen peroxide is 6%, the ratio of water to binder has a greater influence on the thermal conductivity of foam concrete. When the amount of hydrogen peroxide is higher, the influence of water binder ratio on thermal conductivity decreases.

show abstract