An experimental study on the relation between input variables and output quality of a new concrete recycling process

Lotfi, Somayeh; Rem, Peter; Deja, Jan; Mróz, Radosław

doi:10.1016/j.conbuildmat.2017.01.085

Cited by 26 publications

(6 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, how the higher strength of parent concrete would also produce higher quality of RA leading to better performance of RAC was not explained in-depth in most relevant existing studies [105,106]. Despite that, it could be indicated from Lotfi et al [107] that the quality of the parent concrete would affect the RAs' microstructure, which further impact RAs' engineering properties (e.g., water absorption, roughness, and abrasion resistance, etc). Jin et al [104] compared two different types of RAs (i.e., RAs from demolished concrete and from recycled red bricks) in terms of their effects on concrete properties.…”

Section: The Effect Of Ra Sources On Properties Of Recycled Productsmentioning

confidence: 99%

Adopting recycled aggregates as sustainable construction materials: A review of the scientific literature

Chen

Jin

et al. 2019

Construction and Building Materials

135

View full text Add to dashboard Cite

Adopting a holistic three-step literature review workflow, a total of 1,639 journal articles were used in this study as the literature sample related to recycled aggregate (RA). This study summarized the existing research topics focusing on RA, gaps of current research, suggestions for promoting RA usage, and research directions for future work. A research framework was also proposed linking the existing research themes into trends in RA research. This review work serves as a foundation work to bridge the gap between scientific research and industry practice, as well as to guide the directions in RA-related academic work using an interdisciplinary approach.

show abstract

Section: The Effect Of Ra Sources On Properties Of Recycled Productsmentioning

confidence: 99%

Adopting recycled aggregates as sustainable construction materials: A review of the scientific literature

Chen

Jin

et al. 2019

Construction and Building Materials

135

View full text Add to dashboard Cite

show abstract

“…There is a common opinion that using recycled aggregates from construction and demolition waste can preserve natural aggregate resources, reduce demand of landfill, and contribute to sustainable built environment. There is a significant number of reports on the problem of construction and demolition wastes, their re-use as recycled concrete aggregate after crushing, milling, classification and separation of contaminants [4][5][6][7][8][9][10][11]. Some of the stateof-the art papers appeared recently [12][13][14].…”

Section: The Use Of Recycled Aggregate In Concrete -General Aspectsmentioning

confidence: 99%

“…Some of the stateof-the art papers appeared recently [12][13][14]. The effect of parent concrete properties on the quality of concrete aggregate was studied in many research centers [9]. As it has been found for many years studies and practical trials, the recycled aggregate can be successfully used in the production of ready mix and precast concrete, as a partial or whole substitute of natural aggregate, particularly since the amount of construction and demolition wastes continuously grows.…”

Section: The Use Of Recycled Aggregate In Concrete -General Aspectsmentioning

confidence: 99%

Use of Prefabrication, Construction and Demolition Wastes as an Aggregate in Vibropressed Precast Concrete Blocks Production

Łój¹,

Nocuń-Wczelik²

2022

J. Civ. Eng. Constr.

View full text Add to dashboard Cite

The aim of current study was to determine the recycled concrete aggregate (RCA) applicability in the production of concrete mixture for vibropressed concrete blocks. The experiments were focused especially on the crushed waste material from the same concrete elements producing plant. For this type of precast elements only some finer fractions can be implemented and the “earth-moist” consistency of fresh mixture is required. The series of samples was prepared in which the mixture of natural aggregates was partially or totally substituted by recycled concrete aggregate. The 0/4 RCA fraction, which is usually rejected in ready mix concrete technology, plays a role of 0/2 sand. The substitution of sand fraction was from 20% to 100% respectively. The substitution of the coarser aggregate fractions by 4/16 RCA was also done. The standard properties of vibropressed elements, such as the degree of densification, the density of material, the compressive and splitting tensile strength and the water absorption capacity according to the relevant standards were determined. The parameters of materials with the natural aggregate substitution by RCA are affected by the ratio of recycled concrete aggregate. In most cases the results do not decline specially from those for reference samples, when only the natural sand (0/2) fraction is substituted by the 0/4 recycled aggregate. As one could expect, as lower the substitution, as better the test results. The partial substitution of natural aggregate by coarser fractions requires experimental verification; over 20% substitution of natural aggregate by 4/8, 8/16 or 0/16 RCA should be excluded.

show abstract

“…Input variables and output variables [25] are two of basic elements in mathematical modeling and statistical analysis. Prediction model predicts the values of output variables based on the values of input variables by involving the influence of input variables have on the output variables.…”

Section: Statistical Analysis and Modelingmentioning

confidence: 99%

Development of droplet characteristics prediction models for air induction nozzles based on wind tunnel tests

Liao

Hewitt

Wang

et al. 2019

International Journal of Agricultural and Biological Engineering

View full text Add to dashboard Cite

Nozzle flowrate and spray pressure are two of the most important factors influencing on droplet characteristics. With the aim to develop prediction models for air-induction nozzles (AINs), a series of Billericay Farm Services (BFS) AINs with different orifice diameters in combination with tap water were tested. 0.2 MPa, 0.3 MPa, 0.4 MPa, 0.5 MPa, 0.6 MPa and 0.7 MPa of spray pressures and 2 m/s, 3 m/s, 4 m/s and 5 m/s of air speeds were setup. Based on the wind tunnel tests data, prediction models with input variables of nozzle flowrate and spray pressure and output variables of D v0.1 , D v0.5 , D v0.9 , %<150 µm (proportion of spray volume contained in droplets with diameter below 150 µm), relative span (RS) and coefficient of variation (CV) of D v0.5 were developed. The developed models were validated based on wind tunnel experimental data. Results showed that: for D v0.1 , D v0.5 , D v0.9 and %<150 µm, R 2 were equal to 0.768, 0.823, 0.868 and 0.811, indicating that the predictive ability for these four parameters is strong. For RS and CV, R 2 were equal to 0.100 and 0.113, respectively, indicating that the predictive ability for these two parameters is poor. The models developed in the present study are helpful for facilitating the use of AIN in agricultural spray application. et al. Development of droplet characteristics prediction models for air induction nozzles based on wind tunnel tests. Int J Agric & Biol Eng, 2019; 12(6): 1-6.

show abstract

An experimental study on the relation between input variables and output quality of a new concrete recycling process

Cited by 26 publications

References 16 publications

Adopting recycled aggregates as sustainable construction materials: A review of the scientific literature

Adopting recycled aggregates as sustainable construction materials: A review of the scientific literature

Use of Prefabrication, Construction and Demolition Wastes as an Aggregate in Vibropressed Precast Concrete Blocks Production

Development of droplet characteristics prediction models for air induction nozzles based on wind tunnel tests

Contact Info

Product

Resources

About