Recycling of C&D waste involving materials (e.g. plasterboard, wood, metal, concrete, etc.) can occur on or off-site. This will reduce GHG emissions and raw material extraction (Kabirifar et al. 2020).
Recycled concrete, burnt clay bricks, recycled aggregates, palm kernel shell, and broken tiles have been identified as potential alternatives, either as partial or full replacements for …
Ahmadu Bello University, Zaria, Nigeria ... recycled aggregate replacing natural aggregate increased from 0% to , the compressive strength decreased from 30.85 Mpa to 17.58 Mpa which is a 43% decrease as compared to natural aggregate concrete. A 10% addition of …
PROPERTIES OF RECYCLED AGGREGATE IN CONCRETE Table 7: Mix proportions used in the testing program of concrete Material Quantity of Materials by Weight W/C (water to Cement Ratio) 0.65 0.58 0.5 Cement Content (Kg/m³) 290 290 290 - water necessary for the mix (L) 188 168 145 - water quantity for absorption (L) 12 12 15 200 180 160 1,100 1,135 ...
Nigeria generates over 88% of its plastic waste that is not recycled. Nigeria's waste recycling sector is grossly underdeveloped and has a negative economic impact on the country. Waste pollution complicates environmental pollution, resulting in 32 million tonnes of waste being produced each year. The states of Borno, Aba, and Osun are ...
Reclaimed Asphalt Pavement (RAP) as recycled aggregates is a relatively new construction process of rigid pavements due to the scarcity and degradation of natural aggregates. This study aims at the sequential characterization of RAP aggregate to obtain optimized proportions for strength. For this purpose, RAP aggregates were used for the …
Recycled Aggregate Concrete (RAC) with coarse recycled aggregates and natural sand In their works, Limbachiya et al. (2004), the compressive strength test on standard 100mm cubes up to one year after initial curing in water at 20 °C and in air at 20°C/ 55% RH showed that up to 30% recycled coarse aggregates has no effect on the strength of ...
However, the sample with recycled aggregate was still better than that with marble waste in this regard. ARTICLE HISTORY Received 20 April 2020 Accepted 05 April 2021 KEYWORDS Recycled aggregate; self- ... Nigeria. About 235 cases have been reported between 2007 and 2020 (The conversation). The construction
Basic concrete properties like compressive strength, flexural strength, workability etc are discussed with respect to different combination of recycled aggregate with natural aggregate. Codal guidelines of recycled aggregate in various countries are discussed together with present status of recycled aggregate in Nigeria.
Department of Civil Engineering, University of Nigeria, Nsukka, Nigeria E-mail: [email protected] Received: 7 August 2010 / Accepted: 20 December 2010 / Published: 24 December 2010 Abstract Recycled asphalt pavement (RAP) is the reclaimed and reprocessed pavement material containing asphalt and aggregate. Most RAP is recycled back into
construction aggregate and recycled concrete materials. [2015 c 142 § 2.] Recodified as RCW 70A.205.700 pursuant to 2020 c 20 § 2011. 70.95.807 Report to the legislature. [2020 c 20 § 1203; 2015 c 142 § 3.] Recodified as RCW 70A.205.705 pursuant to 2020 c 20 § …
The Textile Recycling industry in Nigeria and across Africa is a critical pillar in the ongoing battle against textile waste and its adverse effects on our environment. The urgent need for sustainable practices cannot be overstated in a world where the textile industry continues to expand exponentially, making textile recycling a beacon of hope. Statistical […]
Recycled and secondary aggregates are making an increasingly important contribution to the UK's needs.. ... However continued effort is required to instil confidence with the recycled aggregate across the full range of private and local authority customers. Prior to the introduction of the Quality Protocol, the lack of adequate technical ...
7. Classification & properties of recycle aggregate concrete Material composition is the basis for classification of recycled concrete aggregate in two main types- 1) Crushed concrete 2) Mixed material Each of these types is divided in a class for bound and a class for unbound use Crushin g age Bulk specific gravity Bulk density Absorp tion (%) Crushin g …
If you peer into the gutters of any big Nigerian city, a filthy sight awaits you: Floating cans, nylon water sachets, empty bottles and other waste materials discarded by humans, swept there by ...
Recycled aggregate samples had a much lower permanent strain value and much higher modulus value than natural aggregate subbase material. The M r of RCA was found to be up to 229% higher than that of a natural aggregate subbase material and higher M r values of RCA indicated that residual cementing action is taking place in RCA samples ...
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The strength of the aggregate can be assessed by conducting this test. The aggregate crushing value gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. Size of recycled aggregates taken for conducting test was between 12.5mm and 10mm.
Diversifying Aggregate Sources in Northern Nigeria: A Review of Alternative Materials aUmar, B., ... Kong in 2016, with only 7.7% of it being recycled. The use of WGC as an aggregate in concrete production has gained significant research interest both locally and globally. Five research studies on the application of WGC as
• Recycling and reuse is an appropriate solution. • Use of recycled aggregates prove to be valuable. • There is a need for modifying codes, specification • The subject of use of recycled aggregates in India should be given importance • Use of recycled aggregate as a replacement of natural coarse aggregate provides environmental friendly
Investigative Study of Recycled Aggregate Concrete as a Sustainable Waste Management Strategy in Nigeria Nwadike Ethelbert Chukwunonye1, Anyadiegwu Chibueze Pius 2, Nwosu Ifeanyi Chiwike3 Uboh Joshua Richard4, Onyewuchi Chibueze Marcel 5 1.2.3,4,5Department of Civil Engineering, Federal Polytechnic Nekede, Imo, Nigeria Abstract
In this study, locally produced Metakaolin (MK) was used as an admixture in recycled aggregate concrete of grades M 25 and M 30. The content of MK varied from 0-15% at 5% intervals. The physical and mechanical properties (bulk density, specific gravity, water absorption, aggregate crushing value and aggregate impact value) of aggregates were …
This study provides a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, recycling, reuse and manufacture …
The strength of RCA is also related to the old mortar that is bonded with the aggregates . Crushing and Los Angeles (LA) tests are conducted to check aggregates' …
E. A. Olanipekun, K. O. Olusola O. Ata Nigeria [39] Coarse Aggregates: Two nominal mix were used: 1:1:2 and 1:2:4 0%, 25%, 50%, 75%, : ... Absorption of water of recycled aggregate increases from 1.5% to 4.6% causing more water demand but some artificial plasticizers can be used for this purpose. The reduction in workability of mixed ...
recycled aggregate in nigeria - Crusher, recycled aggregate concrete journals in Jalandhar, Behavior of Steel Fibre Reinforced recycled aggregate concrete, Accepted for Publication in NEXT: quarry in Lagos ... Go to Product Center
This paper focuses on the particle crushing mechanism of construction solid waste recycled aggregate (CWRA), particularly recycled concrete (RC) and recycled bricks (RB), …
Durability. Recycled aggregate concrete has better resistance to carbonation than natural aggregate concrete (Dhir and Paine 2007) because recycled aggregate concretes have higher cement content to achieve a given strength. Abrasion resistance of recycled aggregate concrete has been assessed using an accelerated abrasion method (Dhir et al 1999).
Construction and demolition waste generated by the construction industry and which posed an environmental challenge can only be minimized by the reuse and recycling of the waste it generates. Therefore, this study seeks to utilize sandcrete blocks
Due to the day-by-day increasing amount of demolished concrete waste, the idea of recycling such waste to produce aggregate for reuse in construction has been increasingly encouraged, thereby promoting the use of a recycled coarse aggregate as a substitute for the natural …
A Nigerian entrepreneur has set up a business that recycles old car tyres and transforms them into high-demand goods. These have helped both the environment and communities in Nigeria. ... Recycling e-waste in Nigeria protects planet and creates safe jobs; As the world's waste mounts, technology is helping communities reduce, reuse and recycle
Utilizing recycled aggregate is certainly one of the most important steps toward sustainable development in the concrete industry and the management of construction waste. …
together with present status of recycled aggregate in Nigeria. ... Recycled aggregate consisted of crushed concrete (CC) or crushed brick (CB) with particles less than 5 mm in diameter. The free ...