scholarly journals Inclined porous concrete surface impact on infiltration using recycled concrete aggregate

2021 ◽  
Vol 930 (1) ◽  
pp. 012100
Author(s):  
E N Cahya ◽  
R Haribowo ◽  
E Arifi
Keyword(s):  
Coarse Aggregate ◽  
Infiltration Rate ◽  
Concrete Surface ◽  
Recycled Concrete ◽  
Concrete Aggregate ◽  
Infiltration Capacity ◽  
Porous Concrete ◽  
Recycled Coarse Aggregate ◽  
The Impact ◽  
Inclined Surface

Abstract Predicting the infiltration rate on inclined surfaces is a pending case, especially when compared to rain intensity. The inclined surface has less ability to generate ponding, leading to higher runoff and higher erosion rates. In the rainy season, on the highway with a very steep slope, erosion usually occurs and becomes very dangerous. By using porous concrete, it is expected to receive higher infiltration and less runoff. This study aimed to determine the impact of the inclined surface of porous concrete on infiltration capacity. The research was conducted using both natural coarse aggregate and recycled coarse aggregate made from concrete waste. The infiltration and permeability test were conducted using porous concrete slabs under 0 to 30% inclined surface. It was shown that the infiltration rate is getting lower as the surface is being steeper. It was also shown that porous concrete made from recycled coarse aggregate has higher performance on permeability and infiltration rate compared to porous concrete made from the natural one.

Experimental Study on Flexural Behaviors of Steel Reinforced Recycled Coarse Aggregate Concrete Beams

2012 ◽  
Vol 166-169 ◽  
pp. 1614-1619 ◽  
Author(s):  
Wen Yue Qin ◽  
Yu Liang Chen ◽  
Zong Ping Chen
Keyword(s):  
Bearing Capacity ◽  
Coarse Aggregate ◽  
Concrete Beams ◽  
Concrete Strength ◽  
Recycled Concrete ◽  
Flexural Behavior ◽  
Aggregate Concrete ◽  
Strength Grade ◽  
Recycled Coarse Aggregate ◽  
The Impact

In order to reveal the flexural behavior of normal section of steel reinforced recycled coarse aggregate concrete beams，6 steel reinforced recycled concrete beams were designed for flexural test，the study mainly considered the impact of coarse aggregate replacement rates and concrete strength grade two changing parameters on the flexural behavior of steel reinforced recycled coarse aggregate concrete beams. Through this test, the whole mechanical process、crack distribution and failure behavior of this kind of specimens were observed, and obtained the stress-strain distribution curves、the ultimate bearing capacity and load-displacement curves parameters. Based on the study measurement data, deeply analyzed the impact of coarse aggregate replacement rates and concrete strength grade on the flexural behavior of steel reinforced recycled coarse aggregate concrete beams. The result shows that: steel reinforced recycled coarse aggregate concrete beams’ failure pattern was similar to normal SRC beams, during loading process the section strain agreed with the plane-section assumption, and the beams have good bearing capacity and deformation performance.

scholarly journals The influence of recycled concrete aggregate on the properties of concrete

2018 ◽  
Vol 162 ◽  
pp. 02020 ◽  
Author(s):  
Nisreen Mohammed ◽  
Kaiss Sarsam ◽  
Mazin Hussien
Keyword(s):  
Compressive Strength ◽  
Coarse Aggregate ◽  
Recycled Concrete ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Modulus Of Rupture ◽  
Concrete Aggregate ◽  
Hardened Concrete ◽  
Recycled Coarse Aggregate ◽  
Natural Aggregates

Use of Recycled Coarse Aggregate (RCA) in concrete can be described in terms of environmental protection and economy. This paper deals with the mechanical properties of concrete compressive strength, splitting tensile strength, modulus of elasticity, and modulus of rupture. Three kinds of concrete mixtures were tested, concrete made with Natural Coarse Aggregate (NCA) as a control concrete and two types of concrete made with recycled coarse aggregate (50% and 100% replacement level of coarse recycled aggregate). These kinds of concrete were made with different targets of compressive strength of concrete f ’c (35MPa) and (70 MPa). Fifty specimens were tested of the fresh and hardened properties of concrete. The waste concrete from laboratory test cubes was crushed to produce the Recycled Coarse Aggregate used in recycled concrete. A comparative between the experimental results of the properties for fresh and hardened concrete is presented in the paper. Recycled aggregate concrete (RCA) had a satisfactory performance despite the replacement ratios. It was found using the size of Recycled Coarse Aggregate (RCA) of (5-14) mm has quite similar in performance with the same size of Natural Coarse Aggregate (NCA), it is necessary to use high quality of recycled concrete (with low levels of impurities). Recycled aggregate as an alternative to natural aggregates -seems quite successful.

Study on Properties of Self-Compacting Concrete Prepared with Coarse Recycled Concrete Aggregate

2014 ◽  
Vol 638-640 ◽  
pp. 1494-1498 ◽  
Author(s):  
Jian Jie Yu ◽  
Jian Gong ◽  
Jie Ming Zou ◽  
Wei Kang Yang
Keyword(s):  
Coarse Aggregate ◽  
Recycled Concrete ◽  
Working Environment ◽  
Recycled Aggregate ◽  
Concrete Aggregate ◽  
Self Compacting Concrete ◽  
Recycled Coarse Aggregate ◽  
Concrete Mixtures ◽  
Crushed Concrete ◽  
Construction Efficiency

Self-compacting concrete is absent of vibration noise during casting, improves the construction efficiency, and provides a healthier working environment compared to the traditional vibrated concrete. The potential coarse recycled aggregate obtained from crushed concrete for making self-compacting concrete was considered to replace the aggregate with the percentage of substitution of recycled coarse aggregate 0%, 50% and 100%. Thus, three types of concrete mixtures were made. Experiments show that, the properties of these concrete only have slight differences and recycled coarse aggregate can be successfully used for the preparation of self-compacting concrete. The method solves the problem of the waste disposal by the demolition of old buildings.

scholarly journals Experimental Research on Strength of Concrete Prepared by using Coarse Aggregate from Concrete Debris

2019 ◽  
Vol 8 (6S3) ◽  
pp. 1533-1537
Keyword(s):  
Coarse Aggregate ◽  
Economic Benefits ◽  
Recycled Concrete ◽  
Recycled Aggregates ◽  
Concrete Aggregate ◽  
Main Role ◽  
Fine Aggregate ◽  
Investment Funds ◽  
Waste Transfer ◽  
The Impact

Cement is the blend of cement, fine aggregate, coarse aggregate with addition of water. In this coarse aggregate plays the main role. But the resources of coarse aggregate get reduces day by day. So we have to found out the alternate way. The complete quantum of waste from development industry is evaluated to be 12 to 14.7 million tons for each annum out of which 7 to 8 million tons are concrete and block squander in India. These days, practically all obliterated cement has been for the most part dumped to landfills. As concrete is a basic, masscreated material in the development business, endeavours have been made to reuse and to monitor it. Solid reusing have as of late turned out to be significant parts of the development business. Solid reusing can be cultivated by reusing solid items, and after that prepared into optional crude materials as filling materials, street bases and sub bases or total for the creation of new concrete. The utilization of reused totals from development and destruction squanders is indicating planned application in development as option in contrast to essential totals. It preserves regular assets and lessens the space required for the landfill transfer. Recycled aggregates are comprised of crushed and graded materials that have been utilized in the development. The point of our research is to decide the characteristic quality of reused totals for application in basic individuals, which can give a superior comprehension on the properties of reused totals as an alternate material to coarse aggregate in structural elements. By using this material the area for damping the concrete debris in the landfills and the emission of CO2 during the mining of the aggregates can be minimized. Reduces the impact on landfills by which the land area can be used for other useful purposes like construction of transmission towers, mobile towers etc., Makes the cost investment funds in the transportation of total, and waste items and in waste transfer. There are both environmental and economic benefits of using recycled concrete aggregate

Research and Application of Different Rage Fly Ashes in Recycled Concrete

2012 ◽  
Vol 510 ◽  
pp. 808-811
Author(s):  
Jin Zhou Zhang
Keyword(s):  
Theoretical Basis ◽  
Coarse Aggregate ◽  
Recycled Concrete ◽  
Fly Ashes ◽  
Recycled Coarse Aggregate ◽  
The Impact

In this paper, it was introduced that the case that under100% replacement of recycled coarse aggregate (RCA), the C30 recycled concrete was prepared by different rage fly ashes 0%, 10%, 20%, 30% replacing cement. The strength of the recycled concrete and mixtures workability were test. Eventually it is concluded that the strength and mixtures workability of recycled concrete were affected by different circumstance under the different rage and amount of fly ashes, and a theoretical basis in the impact of fly ashes in the application of recycled concrete is provided.

scholarly journals Carbonization Durability of Two Generations of Recycled Coarse Aggregate Concrete with Effect of Chloride Ion Corrosion

2020 ◽  
Vol 12 (24) ◽  
pp. 10544
Author(s):  
Chunhong Chen ◽  
Ronggui Liu ◽  
Pinghua Zhu ◽  
Hui Liu ◽  
Xinjie Wang
Keyword(s):  
Compressive Strength ◽  
Coarse Aggregate ◽  
Chloride Ion ◽  
Total Porosity ◽  
Recycled Concrete ◽  
Carbonation Depth ◽  
Aggregate Concrete ◽  
Recycled Coarse Aggregate ◽  
Carbonation Resistance ◽  
Two Generations

Carbonation durability is an important subject for recycled coarse aggregate concrete (RAC) applied to structural concrete. Extensive studies were carried out on the carbonation resistance of RAC under general environmental conditions, but limited researches investigated carbonation resistance when exposed to chloride ion corrosion, which is an essential aspect for reinforced concrete materials to be adopted in real-world applications. This paper presents a study on the carbonation durability of two generations of 100% RAC with the effect of chloride ion corrosion. The quality evolution of recycled concrete coarse aggregate (RCA) with the increasing recycling cycles was analyzed, and carbonation depth, compressive strength and the porosity of RAC were measured before and after chloride ion corrosion. The results show that the effect of chloride ion corrosion negatively affected the carbonation resistance of RAC, and the negative effect was more severe with the increasing recycling cycles of RCA. Chloride ion corrosion led to a decrease in compressive strength, while an increase in carbonation depth and the porosity of RAC. The equation of concrete total porosity and carbonation depth was established, which could effectively judge the deterioration of carbonation resistance of RAC.

Traffic and residue cover effects on infiltration

Soil Research ◽  
2001 ◽  
Vol 39 (2) ◽  
pp. 239 ◽  
Author(s):  
Yuxia Li ◽  
J. N. Tullberg ◽  
D. M. Freebairn
Keyword(s):  
Conservation Tillage ◽  
Infiltration Rate ◽  
Farming System ◽  
Infiltration Capacity ◽  
Plant Available Water ◽  
The Impact ◽  
Reduced Time ◽  
Factor Governing ◽  
Controlled Traffic

Wheel traffic can lead to compaction and degradation of soil physical properties. This study, as part of a study of controlled traffic farming, assessed the impact of compaction from wheel traffic on soil that had not been trafficked for 5 years. A tractor of 40 kN rear axle weight was used to apply traffic at varying wheelslip on a clay soil with varying residue cover to simulate effects of traffic typical of grain production operations in the northern Australian grain belt. A rainfall simulator was used to determine infiltration characteristics. Wheel traffic significantly reduced time to ponding, steady infiltration rate, and total infiltration compared with non-wheeled soil, with or without residue cover. Non-wheeled soil had 4—5 times greater steady infiltration rate than wheeled soil, irrespective of residue cover. Wheelslip greater than 10% further reduced steady infiltration rate and total infiltration compared with that measured for self-propulsion wheeling (3% wheelslip) under residue-protected conditions. Where there was no compaction from wheel traffic, residue cover had a greater effect on infiltration capacity, with steady infiltration rate increasing proportionally with residue cover (R 2 = 0.98). Residue cover, however, had much less effect on inf iltration when wheeling was imposed. These results demonstrated that the infiltration rate for the non-wheeled soil under a controlled traffic zero-till system was similar to that of virgin soil. However, when the soil was wheeled by a medium tractor wheel, infiltration rate was reduced to that of long-term cropped soil. These results suggest that wheel traffic, rather than tillage and cropping, might be the major factor governing infiltration. The exclusion of wheel traffic under a controlled traffic farming system, combined with conservation tillage, provides a way to enhance the sustainability of cropping this soil for improved infiltration, increased plant-available water, and reduced runoff-driven soil erosion.

Sign in / Sign up

Export Citation Format

Share Document