Effect of microstructure of ITZ on compressive strength of concrete prepared with recycled aggregates

Using recycled aggregate in concrete is one of the best ways to reduce construction pollution and prevent the exploitation of natural resources to provide the needed aggregate. However, recycled aggregates affect the mechanical properties of concrete, but the existing information on the subject is less than what the industry needs. Compressive strength, on the other hand, is the most important mechanical property of concrete. Therefore, having predictive models to provide the required information can be helpful to convince the industry to increase the use of recycled aggregate in concrete. In this research, three different optimization algorithms including genetic algorithm (GA), salp swarm algorithm (SSA), and grasshopper optimization algorithm (GOA) are employed to be hybridized with artificial neural network (ANN) separately to predict the compressive strength of concrete containing recycled aggregate, and a M5P tree model is used to test the efficiency of the ANNs. The results of this study show the superior efficiency of the modified ANN with SSA when compared to other models. However, the statistical indicators of the hybrid ANNs with SSA, GA, and GOA are so close to each other.

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The Aggregate’s Influences on Properties of Porous Pervious Concrete Made of Recycled Aggregates

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.584-586.1271 ◽

2014 ◽

Vol 584-586 ◽

pp. 1271-1275

Author(s):

Ping Gong ◽

Wen Liang Zhang

Keyword(s):

Particle Size ◽

Compressive Strength ◽

Single Particle ◽

Permeability Coefficient ◽

Pervious Concrete ◽

Recycled Aggregates ◽

Particle Mixing ◽

Compressive Strength Of Concrete

In this study,different particle size’s aggregates ,different aggregate correction coefficients and different sand ratio were selected to study the aggregate’s influences on properties of porous pervious concrete made of recycled aggregates.The results shows that the 28-day compressive strength of concrete with single particle size is lower than those with two kinds of particle mixing ,as for the permeability coefficient, the former is much higher than the latter .With the aggregate correction coefficient’s increase,the 28-day compressive strengths of concrete increases first and then decreases, the permeability coefficient increases . The 28-day compressive strengths of concrete increases with the increase of the sand ratio. the permeability coefficient increases first ,decreases then.

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Influence of Parent Concrete Properties on Compressive Strength and Chloride Diffusion Coefficient of Concrete with Strengthened Recycled Aggregates

Materials ◽

10.3390/ma13204631 ◽

2020 ◽

Vol 13 (20) ◽

pp. 4631 ◽

Cited By ~ 1

Author(s):

Jingwei Ying ◽

Zewen Han ◽

Luming Shen ◽

Wengui Li

Keyword(s):

Compressive Strength ◽

Diffusion Coefficient ◽

Water Absorption ◽

Recycled Aggregates ◽

Chloride Diffusion ◽

Chloride Diffusion Coefficient ◽

Wide Range ◽

Different Types ◽

Compressive Strength Of Concrete ◽

Silica Slurry

Parent concrete coming from a wide range of sources can result in considerable differences in the properties of recycled coarse aggregate (RCA). In this study, the RCAs were obtained by crushing the parent concrete with water-to-cement ratios (W/Cparent) of 0.4, 0.5 and 0.6, respectively, and were strengthened by carbonation and nano-silica slurry wrapping methods. It was found that when W/Cparen was 0.3, 0.4 and 0.5, respectively, compared with the mortar in the untreated RCA, the capillary porosity of the mortar in the carbonated RCA decreased by 19%, 16% and 30%, respectively; the compressive strength of concrete containing the carbonated RCA increased by 13%, 11% and 13%, respectively; the chloride diffusion coefficient of RAC (DRAC) containing the nano-SiO2 slurry-treated RCA decreased by 17%, 16% and 11%; and that of RAC containing the carbonated RCA decreased by 21%, 25% and 26%, respectively. Regardless of being strengthened or not, both DRAC and porosity of old mortar in RCAs increased with increasing W/Cparent. For different types of RCAs, DRAC increased obviously with increasing water absorption of RCA. Finally, a theoretical model of DRAC considering the water absorption of RCA was established and verified by experiments, which can be used to predict the DRAC under the influence of different factors, especially the water absorption of RCA.

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Study of the Compressive Strength of Concrete Using Marble, Granite and Recycled Aggregates with Polypropylene Fiber

SMART MOVES JOURNAL IJOSCIENCE ◽

10.24113/ijoscience.v5i6.242 ◽

2019 ◽

Vol 5 (12) ◽

pp. 7-11

Author(s):

Rajiv Sonwane ◽

Pushpendra Kumar Kushwaha ◽

Jiji M Thomas

Keyword(s):

Compressive Strength ◽

Polypropylene Fiber ◽

Environmental Problems ◽

Recycled Aggregate ◽

Recycled Aggregates ◽

Experimental Investigations ◽

Recycle Aggregate ◽

Coarse Aggregates ◽

Open Land ◽

Compressive Strength Of Concrete

Marble Industry produces large amount of waste during mining and processing stages. This waste is dumped on to open land which creates a lot of environmental problems We get recycle aggregate from the old dumped structures and buildings. The main objective of this study was utilization of marble, granite and recycled aggregate waste with polypropylene fiber as a replacement for conventional natural coarse aggregates in concrete. Experimental investigations were carried out to examine the feasibility of use of marble, granite and recycled aggregates waste as coarse aggregates in concrete. Conventional natural coarse aggregates was fully replacement by marble in different percentages 0-60% , granite 0-30% and recycle aggregates 0-40% with polypropylene fiber less than 1% by weight. The concrete formulations were prepared with a constant water.

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Study of the Compressive Strength of Concrete Using Marble, Granite and Recycled Aggregates with Polypropylene Fiber

SMART MOVES JOURNAL IJOSCIENCE ◽

10.24113/ijoscience.v5i12.242 ◽

2019 ◽

Vol 5 (12) ◽

pp. 7-11

Author(s):

Rajiv Sonwane ◽

Pushpendra Kumar Kushwaha ◽

Jiji M Thomas

Keyword(s):

Compressive Strength ◽

Polypropylene Fiber ◽

Environmental Problems ◽

Recycled Aggregate ◽

Recycled Aggregates ◽

Experimental Investigations ◽

Recycle Aggregate ◽

Coarse Aggregates ◽

Open Land ◽

Compressive Strength Of Concrete

Marble Industry produces large amount of waste during mining and processing stages. This waste is dumped on to open land which creates a lot of environmental problems We get recycle aggregate from the old dumped structures and buildings. The main objective of this study was utilization of marble, granite and recycled aggregate waste with polypropylene fiber as a replacement for conventional natural coarse aggregates in concrete. Experimental investigations were carried out to examine the feasibility of use of marble, granite and recycled aggregates waste as coarse aggregates in concrete. Conventional natural coarse aggregates was fully replacement by marble in different percentages 0-60% , granite 0-30% and recycle aggregates 0-40% with polypropylene fiber less than 1% by weight. The concrete formulations were prepared with a constant water.

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Study of the Compressive Strength of Concrete Using Marble, Granite and Recycled Aggregates with Polypropylene Fiber

SMART MOVES JOURNAL IJOSCIENCE ◽

10.24113/ijo-science.v5i6.242 ◽

2019 ◽

Vol 5 (6) ◽

pp. 6

Author(s):

Rajiv Sonwane ◽

Pushpendra Kumar Kushwaha ◽

Jiji M Thomas

Keyword(s):

Compressive Strength ◽

Polypropylene Fiber ◽

Environmental Problems ◽

Recycled Aggregate ◽

Recycled Aggregates ◽

Experimental Investigations ◽

Recycle Aggregate ◽

Coarse Aggregates ◽

Open Land ◽

Compressive Strength Of Concrete

Marble Industry produces large amount of waste during mining and processing stages. This waste is dumped on to open land which creates a lot of environmental problems We get recycle aggregate from the old dumped structures and buildings. The main objective of this study was utilization of marble, granite and recycled aggregate waste with polypropylene fiber as a replacement for conventional natural coarse aggregates in concrete. Experimental investigations were carried out to examine the feasibility of use of marble, granite and recycled aggregates waste as coarse aggregates in concrete. Conventional natural coarse aggregates was fully replacement by marble in different percentages 0-60% , granite 0-30% and recycle aggregates 0-40% with polypropylene fiber less than 1% by weight. The concrete formulations were prepared with a constant water.

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