In this study, the researchers introduce an innovative method to enhance the utilization of recycled coarse aggregates (RCA) derived from construction and demolition waste (C&D) in sustainable ...
This study investigates the effects of variations in the coarse-to-fine aggregate ratio and water/binder (w/b) ratio on the fresh, hardened, and durability properties of SCC. ... Self-compacting concrete with recycled coarse aggregates from concrete construction and demolition waste–Current state-of-the art and perspectives. Constr. Build ...
Self-compacting concrete with recycled coarse aggregates from concrete construction and demolition waste – Current state-of-the art and perspectives. Author links open overlay panel Seweryn ... Finally, the parametric evaluation conducted revealed that CS and STS are inversely proportional to water-cement ratio and aggregate-cement ratio ...
One of the promising solutions to both of these problems could be bulk utilization of industrial waste aggregates in civil and construction industries. In order to check the utilization prospects of any industrial waste aggregate, its crushing characteristics is one of the important parameters that needs to be evaluated.
What Is Concrete Mix Ratio? The Concrete Mix Ratio is the ratio of concrete ingredients like cement, fine aggregate (sand), coarse aggregate (gravel), and water. These mixing ratios are decided on the basis of the type of construction and the mixed designs of the materials.. There are several different types of concrete mix ratios, each of which is designed to meet specific needs …
Interests: recycled aggregate concrete; sustainable construction; construction waste management ... in strengthening mechanical properties of the concrete with coarse aggregates partially replaced with recycled brick aggregates (B-waste), an experimental framework was conducted. ... Under the condition of a 1:4 cement-sand ratio, RP was used to ...
Parametric study: effect of type and replacement ratios of waste materials. Cementitious: Cement: Recycled: Concrete,mosaic-tiles, and clay-brick waste aggregates: Immersion under water and water spraying (2 times a day)-Compressive strength-Water absorption (Botha et al., 2023) Parametric study: effect of replacement ratios of waste …
Recycled aggregates (RA) from construction and demolition waste (CDW) instead of natural aggregates (NA) were analysed in the manufacture of new eco-friendly concrete. Fine (FRA) and coarse (CRA) recycled aggregates were used in different percentages as substitutes of natural sand and gravel, respectively. The results revealed that the use of RA in percentages …
The annual amount of construction and demolition waste (CDW) ... 50%, 75% and ) were tested keeping the coarse/fine aggregate ratio constant. Superplasticizer content of 0% and 1.3% was used with variable water content to obtain concrete having a …
Construction and demolition waste (CDW) negatively affect costs, energy, productivity, the environment, and society. Planning and storing building trash may reduce these harmful consequences.
Using recycled aggregates from construction and demolition waste can preserve natural aggregate resources, reduce demand of landfill, and contribute to sustainable built environment. This study provides a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, recycling, reuse and manufacture …
At 21 MPa, an increase in the recycled aggregate mixing ratio resulted in a 3–4% lower freeze-thaw resistance compared to regular concrete, while at 24 and 27 MPa, the freeze …
Geopolymers are in many applications a perfect alternative to standard cements, especially regarding the sustainable development of green building materials. This experimental study therefore deals with the investigation of different factors, such as the water content and the binder to aggregate ratio, and their influence on the workability of fresh mortar and its …
recycled aggregate to stabilize the supply and demand of aggregate. As of 2019, the total amount of domestic construction waste was 221,102 tons/day, and noncombustible waste rep-resented the highest proportion at 87.8% (193,977 tons/day). Waste construction material accounted for 99.4% (192,812
Accordingly, the researchers conclude that concrete, produced by replacing coarse aggregate with plastic waste of up to 15%, can be used in the construction of sidewalks, stairs, interior walls, short walls, storage tanks, non-structural slabs, coating works, etc. Saikia and De Brito (2012) conducted an extensive review of some research related ...
These data relate to the binder, the type of aggregate, the proportions of water and binder, the binder/aggregate ratio, the air content, the bulk and absolute densities of the binder and the …
This paper summarizes several aspects related to coarse recycled aggregates, specifically addressing: (i) the typical composition of construction and demolition waste; (ii) the influence of …
Mechanical properties of concrete containing recycled aggregate from construction waste. Author links open overlay panel Indrajit ... The ratio of water to cement in this concrete is 0.56, and the percentage of recycled large aggregates to natural and fresh large aggregate ranges from 0 to 60, with 20 and 30 being the least recycled and 60 ...
In this study, the strength and fracture parameters of slag-based geopolymer mortar (SGPM) using different molarities of sodium hydroxide and different percentages of recycled …
Mortars produced with recycled aggregates from construction and demolition waste – Analysis and construction site application. Author links open overlay panel Ana Antunes a, Hugo ... considering the combination of binders and the respective water-binder and binder-aggregates ratios; and (ii) the different RA and respective proportions ...
An Experimental Study on Structural Concrete Containing Recycled Aggregates and Powder from Construction and Demolition Waste. Jeonghyun Kim, 1, * Anna M. Grabiec, 2 and Andrzej Ubysz 1 Frank ... The replacement ratios of natural coarse and fine aggregates by RCA and RFA were 30, 60, and , and those of ordinary Portland cement for RP were ...
In this work, the strength of EPS waste aggregate was increased by coating the surface of EPS with epoxy resin, and the strengthened EPS aggregate was further used in concrete. The density, flow rate and strength of …
To analyze the applicability of recycled construction-solid-waste aggregate containing brick slag aggregate in the subgrade layer, the effect of brick aggregate content on the CBR (California bearing ratio) and crushing value of mixed recycled aggregates was evaluated based on laboratory tests, and the field compaction quality of the recycled ...
• The sand-to-aggregate ratio will be the sam e as for natural ... One solution to address the growing construction waste challenge is adopting large-scale recycling of concrete waste into ...
The application of construction waste as an aggregate in subgrade backfilling is an important recycling option. This study analyzed a subgrade backfill material consisting of lime-fly ash ...
Impact of sand to aggregate ratio on mechanical properties and micro-structures of waste crumb rubber concrete. Author links open overlay panel Jinxu Mo a, Fengming Ren a b, ... Concrete being the most commonly utilized construction material, natural aggregates usually make up over 60% of the total concrete volume ...
The coarse NA employed was crushed stone obtained from a factory in Hangzhou, and the coarse RA was sourced from a construction waste recycling plant in Hangzhou, with the crushed waste concrete derived from nearby demolished buildings. ... thereby reducing the effective water-to-binder ratio around the aggregates and further diminishing ...
ratio of cemented filling material using construction waste as recycled coarse aggregate was carried out. A ternary quadratic regression model was created using the Box-Behnken design (BBD) based ...
The acid dissolution of 3 kg of C&D waste resulted in an effective separation of materials and yielded 0.745 kg of binder material, which can be repurposed as SCM, and 2.201 kg of aggregates suitable for use as fine aggregate in the construction industry.
Recycled fine aggregate from C&D waste was obtained from a construction waste disposal plant in Beijing, China (Fig. 1). The most prominent feature of C&D waste from Beijing is the large amount of red brick, as compared with those from other areas such as Hong Kong, the United States and Turkey [5], [24], [25]. It also contains much mortar and ...
RCA is engendered from the construction and demolition waste (CDW). The use of RCA in concrete has revealed to be a sustainable and economical alternative to natural …
However, the sample containing the recycled aggregate of stone factory wastes has a higher compressive strength than the sample containing recycled aggregate of construction wastes. On the other hand, the most optimal percentage of recycled aggregate replacement is 30%. 2.4.3. Tensile Strength Test
The global demand for construction quality aggregates is expected to be more than 51 billion metric tons by 2019 [1].The mining, processing, and transport operations for such a large quantity of aggregates consume a huge amount of energy and adversely affect the ecology of the areas and riverbeds [2].Ever increasing demand for quality aggregates has resulted in a faster …
To achieve this, 15 different ratios of mortar samples, sized 5 × 5 × 5 cm, were produced using a 1:3 cement-to-aggregate ratio and a 0.5 water-to-cement ratio. GP was used to substitute cement ...
Reinstating of fine aggregates in a concrete is studied with five incremental ratios such as 20, 40, 60, 80, and . Since debris are coated with fine cementitious particles, the water absorption potential will be high. ... S. P., Puneeth, H. C., & Rohith, M. (2017) Characterization of construction and demolition waste aggregates for rigid ...
Phase 2: The mortar cubes and concrete cubes were casted as per IS 2250 [] and IS 10262 (2019) respectively.The mortar cubes were designed for MM 7.5 grade, concrete cubes made of Natural aggregates were designed for M25 grade and concrete cubes made of recycled aggregates were designed for M25 by varying water-cement ratio.