Effects of fire-damaged concrete waste on the properties of its preparing recycled aggregate, recycled powder and newmade concrete

Ma, Zhiming; Yao, Pengpeng; Yang, Dingyi; Shen, Jiaxin

doi:10.1016/j.jmrt.2021.08.116

Cited by 40 publications

(11 citation statements)

References 55 publications

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“…In this context, the transition to the ‘zero-waste’ pursued by today’s society in the construction sector cannot be achieved without a systematic discussion of the influence of recycled concrete materials of all size fractions generated from C&D waste. As described above, several studies have been conducted on the application of RCA, RFA, and RP as concrete materials, but these studies discuss the properties of concrete using materials obtained from different C&D waste sources or using two recycled concrete materials, mainly RCA and RP [ 29 , 30 , 31 ]. Particularly, little research has been carried out on the properties of concrete incorporating RCA, RFA, and RP obtained from a single source of concrete waste.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Structural Concrete Containing Recycled Aggregates and Powder from Construction and Demolition Waste

2022

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For complete utilization of construction and demolition (C&D) waste, an investigation of all size fractions of C&D waste generated during the recycling process should be conducted. In this work, the effects of three recycled concrete materials with different sizes (recycled coarse aggregate (RCA) with a size of 4.75–25 mm, recycled fine aggregate (RFA) of 0.15–4.75 mm, and recycled powder (RP) smaller than 0.15 mm) produced from concrete waste on the fresh and hardened mechanical properties of concrete were evaluated. The replacement ratios of natural coarse and fine aggregates by RCA and RFA were 30, 60, and 100%, and those of ordinary Portland cement for RP were 10, 20, and 30%. The results showed that the concrete properties deteriorated with increasing replacement ratio regardless of the type of recycled materials. The properties were reduced in the order of the use of RFA, RCA, and the simultaneous use of RCA and RFA. In addition, concrete with 30% RP showed lower mechanical strength than concrete with 100% RCA and 100% RFA. However, all concretes could be applicable for structural purposes under different environmental exposure conditions. In particular, concretes with 10% RP and 20% RP showed better cost-benefits compared to natural aggregate concrete with 100% ordinary Portland cement. These promising findings provide valuable initiatives for the effective and complete recycling of C&D waste.

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Section: Introductionmentioning

confidence: 99%

An Experimental Study on Structural Concrete Containing Recycled Aggregates and Powder from Construction and Demolition Waste

2022

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“…Researchers are seeking new uses for these materials. Most of them, i.e., wood waste [16], bricks [17,18], concrete [19] and steel [20] are being used as an additive for cement composites. Replacing cement allows for a significant reduction in the carbon dioxide released into the atmosphere.…”

Section: Use Of Waste Materials In Compositesmentioning

confidence: 99%

Recycling of Materials from Renovation and Demolition of Building Structures in the Spirit of Sustainable Material Engineering

Czarnecki

Rudner

2023

Buildings

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In the European Union, more than 20% of residential buildings were constructed prior to 1945 and are approaching the end of their projected lifespan. This necessitates renovations or demolitions of these structures. A study was conducted to analyze the quantity of waste generated during the dismantling of a representative building from that era. Construction waste is produced during the building process and its disposal can be costly. Sustainable material engineering offers a solution by promoting the reuse of waste materials. When designing new products, manufacturers should consider using waste materials and ensure they have an extended lifespan, efficient life cycle management, and sustainable consumption. A study has shown that researchers are currently exploring the potential use of waste steel, bricks, wood, and glass in composite materials. Direct reuse of waste in the construction industry has also been observed. However, users’ preferences show that while environmental concerns are important, good quality and price are still the primary factors that drive consumer demand. Therefore, materials made from waste materials must demonstrate excellent parameters to gain consumer acceptance. Education initiatives such as green building certifications and education programs for construction professionals and the general public can help promote sustainable practices. Despite progress made in sustainable development, there is still a need for further education to encourage the adoption of sustainable practices.

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“…The use of aggregates must be by the requirements to achieve better concrete quality because the aggregate composition reaches 65-75% of the total volume of concrete [2]. The role of aggregates in the manufacture and quality of concrete is very influential [3], with the property of having the strength of disintegration and resistance to impact to affect the bond between the cement paste, porosity, and water absorption characteristics [4,5]. It is influenced also by the type or source of aggregates used [6].…”

Section: Introductionmentioning

confidence: 99%

Influence of fine aggregate types for the achievement of concrete quality

Farida,

Rustandi,

Pumamasari

2024

E3S Web Conf.

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Fine aggregates in the form of sand are granulated materials, which generally measure between 0.0625 to 2 millimeters. Sand as a fine aggregate mixed with cement and water becomes a concrete mixture that has a role in the strength of construction. This study aims to determine how much influence the fine aggregates or sand of four different mining sites have on the compressive strength of concrete. The method used is an experiment, based on the results of laboratory tests of compressive strength tests at the age of concrete 7, 14 and 28 days for fc’25 or 25 MPa quality concrete with a mix of designs for fine aggregates from Leles sand, Kuyamut sand, Cikamiri sand, and Cilopang sand, Garut Regency West Java Province Indonesia. The aggregates tested include moisture content, sludge content, organic content, dry saturation, waand ter absorption affects the quality of concrete and improves quality strength with the same treatment for laboratory testing. The results of the analysis with 28 days of concrete compressive strength testing obtained the achievement of the highest concrete strength, namely with Cilopang sand 27 MPa, allowed by Kuyamut sand 26 Mpa, Leles sand 25 MPa and Cikamiri sand 23 MPa. Based on the results of concrete strength testing for up to 28 days, there are three sources of fine aggregates that can reach a minimum of fc’ 25, and there is one sand source that has a compressive strength value of concrete.

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Effects of fire-damaged concrete waste on the properties of its preparing recycled aggregate, recycled powder and newmade concrete

Cited by 40 publications

References 55 publications

An Experimental Study on Structural Concrete Containing Recycled Aggregates and Powder from Construction and Demolition Waste

An Experimental Study on Structural Concrete Containing Recycled Aggregates and Powder from Construction and Demolition Waste

Recycling of Materials from Renovation and Demolition of Building Structures in the Spirit of Sustainable Material Engineering

Influence of fine aggregate types for the achievement of concrete quality

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