Mechanical Properties of Recycled Concrete with Crushed Brick Coarse Aggregate

This paper reports an evaluation of the properties of medium-quality concrete incorporating recycled coarse aggregate (RCA). Concrete specimens were prepared with various percentages of the RCA (25%, 50%, 75%, and 100%). The workability, mechanical properties, and durability in terms of abrasion of cured concrete were examined at different ages. The results reveal insignificant differences between the recycled concrete (RC) and reference concrete in terms of the mechanical and durability-related measurements. Meanwhile, the workability of the RC reduced vastly since the replacement of the RCA reached 75% and 100%. The ultrasound pulse velocity (UPV) results greatly depend on the porosity of concrete and the RC exhibited higher porosity than that of the reference concrete, particularly at the transition zone between the RCA and the new paste. Therefore, the sound transmission in the RC required longer times than that in the reference concrete. Moreover, a predictive equation relating the compressive strength to the UPV was developed.

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Analysis and optimization of mechanical properties of recycled concrete based on aggregate characteristics

Science and Engineering of Composite Materials ◽

10.1515/secm-2021-0050 ◽

2021 ◽

Vol 28 (1) ◽

pp. 516-527

Author(s):

Jiangwei Bian ◽

Wenbing Zhang ◽

Zhenzhong Shen ◽

Song Li ◽

Zhanglan Chen

Keyword(s):

Mechanical Properties ◽

Elastic Modulus ◽

Coarse Aggregate ◽

Aggregate Size ◽

Peak Stress ◽

Recycled Concrete ◽

Maximum Aggregate Size ◽

Coarse Aggregates ◽

Aggregate Content ◽

Aggregate Shape

Abstract The most significant difference between recycled and natural concretes lies in aggregates. The performance of recycled coarse aggregates directly affects the characteristics of recycled concrete. Therefore, an in-depth study of aggregate characteristics is of great significance for improving the quality of recycled concrete. Based on the coarse aggregate content, maximum aggregate size, and aggregate shape, this study uses experiments, theoretical analysis, and numerical simulation to reveal the impact of aggregate characteristics on the mechanical properties of recycled concrete. In this study, we selected the coarse aggregate content, maximum aggregate size, and the aggregate shape as design variables to establish the regression equations of the peak stress and elastic modulus of recycled concrete using the response surface methodology. The results showed that the peak stress and elastic modulus of recycled concrete reach the best when the coarse aggregate content is 45%, the maximum coarse aggregate size is 16 mm, and the regular round coarse aggregates occupy 75%. Such results provide a theoretical basis for the resource utilization and engineering design of recycled aggregates.

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Mechanical properties of concrete containing recycled concrete aggregate (RCA) and ceramic waste as coarse aggregate replacement

10.1063/1.5005412 ◽

2017 ◽

Cited By ~ 6

Author(s):

Faisal Sheikh Khalid ◽

Nurul Bazilah Azmi ◽

Khairul Azwa Syafiq Mohd Sumandi ◽

Puteri Natasya Mazenan

Keyword(s):

Mechanical Properties ◽

Coarse Aggregate ◽

Recycled Concrete ◽

Concrete Aggregate ◽

Recycled Concrete Aggregate ◽

Ceramic Waste

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Effect of Recycled Coarse Aggregate on Recycled Concrete Properties and Study of Optimum Mixture Ratio

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.487.84 ◽

2014 ◽

Vol 487 ◽

pp. 84-89

Author(s):

Hai Long Ning ◽

Wen Feng Zhao ◽

Jian Liu ◽

Shao Peng Jiao ◽

Yi Xin Wang

Keyword(s):

Mechanical Properties ◽

Coarse Aggregate ◽

Concrete Strength ◽

Recycled Concrete ◽

Replacement Rate ◽

Conventional Concrete ◽

Mixture Ratio ◽

Cement Ratio ◽

Water Cement Ratio ◽

Recycled Coarse Aggregate

To study the effect of recycled coarse aggregate, water-cement ratio and mixture ratio on the physico-mechanical properties of recycled concrete, determine the finial optimum mixture ratio and physico-mechanical properties of recycled concrete with the optimum mixture ratio, physico-mechanical tests are done on recycled concrete and conventional concrete. Results show that with the replacement rate increasing of recycled coarse aggregate, the compressive strength and splitting tensile strength of recycled concrete increase and then decrease. It is feasible to develop the concrete with 100% replacement rate of recycled coarse aggregate. With an increase of recycled coarse aggregate replacement rate, dry shrinkage ratio of concrete increases gradually, but the increasing range has little effect on the concrete. The concrete strength of 28 days is linear with water-cement ratio with the correlation coefficient is 0.98763. Taking appropriate mix design, the physico-mechanical properties of recycled concrete will surpass or be equivalent to those of conventional concrete. Recycled concrete of the optimum mixing rate is the high strength with lower brittleness.

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Influence of Granite Cutting Waste and Recycled Concrete on Properties of Self Compacting Concrete

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.d6493.118419 ◽

2019 ◽

Vol 8 (4) ◽

pp. 205-208

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Coarse Aggregate ◽

Strength Test ◽

Recycled Concrete ◽

Fine Aggregate ◽

Self Compacting Concrete ◽

Slump Flow ◽

Hardened Properties ◽

Passing Ability

This paper explains the combined effect of granite cutting waste and recycled concrete on the workability and mechanical properties of self compacting concrete. Experimental plan is divided in such a way that granite cutting waste is replaced with fine aggregate at 0, 20,40,60,80 and 100% proportions. Recycled concrete is replaced with the coarse aggregate starting from 20 to 100%. Total 36 mixes were designed to check the fresh and hardened properties. Slump flow and T500, v-funnel and L-box test are conducted to know the flow ability and passing ability of concrete. To study the hardened properties compressive strength, flexural strength test values are to be collected.

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Mechanical properties of recycled concrete made with different types of coarse aggregate

Construction and Building Materials ◽

10.1016/j.conbuildmat.2016.12.163 ◽

2017 ◽

Vol 134 ◽

pp. 497-506 ◽

Cited By ~ 58

Author(s):

Chunheng Zhou ◽

Zongping Chen

Keyword(s):

Mechanical Properties ◽

Coarse Aggregate ◽

Recycled Concrete ◽

Different Types

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Mechanical Properties of Normal Strength Concrete Containing Different Types of Waste Material as Coarse Aggregate Replacement

Sulaimani Journal for Engineering Sciences ◽

10.17656/sjes.10141 ◽

2020 ◽

Vol 7 (3) ◽

pp. 208-227

Author(s):

Parween Aziz ◽

◽

Mohamed Abdulkadir ◽

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Coarse Aggregate ◽

Waste Material ◽

Normal Strength Concrete ◽

Maximum Loss ◽

Concrete Mix ◽

Different Types ◽

Crushed Brick ◽

Normal Strength

In this study, the effect of different types of waste materials on the mechanical properties of normal strength concrete was investigated. Three types of waste material crumbed rubber, granular plastic, and crushed brick with different percentage up to 15% ( by weight of coarse aggregate) were used. The effect of waste material on the compressive strength, splitting tensile strength, and static elastic modulus of hardened concrete for 28 days of curing with constant w/c= 0.45 were studied. The maximum loss in concrete compressive strength was recorded to be 54.95%, 50.31%, and 20.41% for concrete mix with 15% crumbed rubber and plastic aggregate and 5% crushed brick particles. Maximum reduction in splitting tensile strength noticed to be 65%, 43.15%, and 13.59% for 15% replacement of crumbed rubber, granular plastic, and crushed brick respectively. The maximum loss in static elastic modulus was found to be 48.29%, 27.14, and 11.23% for concrete mix with 15% crumbed rubber, granular plastic, and 5% crushed brick. From test results it is concluded that up to 15% waste material can be safely used to produce this type of recycled concrete.

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Frost resistance of concrete with crushed brick as aggregate

Facta universitatis - series Architecture and Civil Engineering ◽

10.2298/fuace1002155j ◽

2010 ◽

Vol 8 (2) ◽

pp. 155-162 ◽

Cited By ~ 7

Author(s):

Ksenija Jankovic ◽

Dragan Bojovic ◽

Dragan Nikolic ◽

Ljiljana Loncar ◽

Zoran Romakov

Keyword(s):

Mechanical Properties ◽

Grain Size ◽

Compressive Strength ◽

Experimental Research ◽

Experimental Work ◽

Frost Resistance ◽

Cement Content ◽

Recycled Concrete ◽

Concrete Compressive Strength ◽

Crushed Brick

The investigation included concrete made by using recycled brick as aggregate. Experimental work included several types of concrete made with the same cement content (385 kg/m3), and same consistency (slump about 1 cm). Recycled brick and combination of natural river aggregate and recycled brick were used as aggregates. The influence of percentage and grain size of crushed brick aggregate on concrete compressive strength, water absorption and frost resistance were observed. On the basis of the results obtained during experimental research, a general conclusion can be drawn that the application of recycled concrete as aggregate can lead to new composites with satisfactory physical-mechanical properties.

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Research on Mechanical Properties of Fiber Recycled Concrete

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.94-96.909 ◽

2011 ◽

Vol 94-96 ◽

pp. 909-912 ◽

Cited By ~ 1

Author(s):

Xian Hong Meng ◽

Chao He ◽

Xue Feng Feng

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Theoretical Basis ◽

Coarse Aggregate ◽

Steel Fiber ◽

Polypropylene Fiber ◽

Recycled Concrete ◽

Concrete Aggregate ◽

Recycled Concrete Aggregate ◽

Practical Engineering

Test is mixed with a certain amount of fibers and recycled concrete aggregate made from fiber recycled concrete. Fiber is respectively used steel fiber or polypropylene fiber. Each fiber incorporation are five, recycled coarse aggregate replacement percentage is 50%.Contrast different fiber content made from fiber recycled concrete to normal recycled concrete and analyzes the compressive strength variation. To determine the rational content of fiber, provide a theoretical basis for practical engineering.

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Study of the Properties of Full Component Recycled Dry-Mixed Masonry Mortar and Concrete Prepared from Construction Solid Waste

Sustainability ◽

10.3390/su13158385 ◽

2021 ◽

Vol 13 (15) ◽

pp. 8385

Author(s):

Zhenwen Hu ◽

Zhe Kong ◽

Guisheng Cai ◽

Qiuyi Li ◽

Yuanxin Guo ◽

...

Keyword(s):

Mechanical Properties ◽

Solid Waste ◽

Coarse Aggregate ◽

Recycled Concrete ◽

Fine Aggregate ◽

Replacement Rate ◽

Substitution Rates ◽

Natural Aggregate ◽

Mixed Mortar ◽

Masonry Mortar

Solutions are needed to solve the problem of a large amount of construction solid waste and a shortage of natural aggregate (coarse and fine aggregates). In this paper, simple-crushed coarse aggregate (SCRCA) and simple-crushed fine aggregate (SCRFA) were obtained by simple-crushing of construction solid waste. On this basis, SCRCA and SCRFA were treated with particle-shaping to obtain particle-shaping coarse aggregate (PSRCA) and particle-shaping fine aggregate (PSRFA), and the recycled powder (RP) produced in the process of particle-shaping was collected. Under the condition of a 1:4 cement-sand ratio, RP was used to replace cement with four substitution rates of 0, 10%, 20%, and 30%, and dry-mixed masonry mortar was prepared with 100% SCRFA, PSRFA, and river sand (RS). The basic and mechanical properties and microstructure of hydration products of dry-mixed mortar were analyzed, and the maximum substitution rate of RP was determined. Under the condition that the amount of cementitious material is 400 kg/m3 and the RP is at the maximum replacement rate, three different aggregate combinations to prepare concrete are the 100% use of SCRCA and SCRFA, PSRCA and PSRFA, and RS and natural aggregate (NCA); the workability, mechanical properties, and aggregate interface transition zone of the prepared concrete were analyzed. The results show that when the replacement rate of RP is less than 20%, it has little effect on the properties of products. The performance of PSRCA and PSRFA after treatment is better than that of SCRCA and SCRFA. Under different RP substitution rates, the performance of dry-mixed mortar prepared with PSRFA is very close to that prepared with RS. The performance of recycled concrete prepared with PSRCA and PSRFA is also very close to that of products prepared with NCA and RS. The failure morphology of PSRCA and RSRFA concrete is also similar to that of NCA and RS concrete.

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