Multi-factor Effects on the Durability of Recycle Aggregate Concrete

Construction waste has been increasing due to fast development of construction industries. These wastes usually end up on landfill or to be left nearby construction site. This paper focuses on the potential use of recycled waste aggregate in a development of reinforced concrete rectangular container, RACC, as a solid waste storage. The filled container is intended to be used as a retaining structure at riverbanks to control erosion. The experimental programme include cube and cylindrical specimens tested to determine characteristic properties of recycle aggregate concrete (Pc, Pt, E). The characteristic properties obtained were used in designing the RACC to function as storage container and also as a retaining wall as referred to BS 8110 and BS 8007. Results showed that recycle aggregate concrete has relatively high compressive strength, tensile strength and modulus of elasticity. RACC size of 1.0 m x 1.0 m x 1.0 m with 150 mm thickness is found to be suitable and safe to be used both as container and retaining wall. This is proven by the maximum deflection and crack widths achieved which are lower than the allowable limit values.

Download Full-text

Effects of Steel Fibers (SF) and Ground Granulated Blast Furnace Slag (GBBS) on Recycle Aggregate Concrete

10.21203/rs.3.rs-835983/v1 ◽

2021 ◽

Author(s):

Jawad Ahmad ◽

Fahad Aslam

Keyword(s):

Blast Furnace ◽

Blast Furnace Slag ◽

Mechanical Performance ◽

Reinforce Concrete ◽

Recycle Aggregate ◽

Aggregate Concrete ◽

Recycle Aggregate Concrete ◽

Granulated Blast Furnace Slag ◽

Concrete Production ◽

Furnace Slag

Abstract Recycle aggregate is one of the good options to use in concrete as coarse aggregate which results environmental benefits as well as sustainable development. However, recycle aggregate cause reduction in concrete performance. One the other hand, the removal of industrial waste would be considerably decreased if it could be incorporated in cement concrete production. One of these possibilities is the substitution of the cement by slag, which enhance concrete poor properties of recycle aggregate concrete as well as provides to the decrease of cement consumption, reducing carbon dioxide productions, while resolving a waste management challenge. Furthermore, steel fiber was also added to hance the tensile capacity of recycle aggregate concrete. The main goal of this study is to investigate the characteristics of concrete using Ground granulated blast-furnace slag (GGBS) as binding material on recycle aggregate fibers reinforce concrete (RAFRC). Mechanical performance was assessed through compressive strength and split tensile strength, while durability aspects was study through water absorption, acid resistance and dry shrinkage. The results detected from the different experiments depict that replacement of Ground granulated blast-furnace slag (GGBS) enhance mechanical performance as well as durability aspects of the recycle aggregate fibers reinforce concrete (RAFRC).

Download Full-text

Effect of Silica Fume on Mechanical and Durability Properties of Recycled Coarse Aggregate Concrete

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.d1017.1284s291 ◽

2019 ◽

Vol 8 (4S2) ◽

pp. 68-72

Keyword(s):

Silica Fume ◽

Coarse Aggregate ◽

Mineral Admixture ◽

Mix Design ◽

Recycle Aggregate ◽

Aggregate Concrete ◽

Durability Properties ◽

Natural Aggregate ◽

Water Sorptivity ◽

Sorptivity Test

Reusing concrete is the best choice to diminish the eagerness on mind blowing standard assets and to oblige the total of waste which is engineered in landfills. Reused concrete has been regularly used as an unbound material as a touch of dams, bases, and sub-bases. RAC has in like way been utilized as a piece of the improvement of asphalts and wastes yet in less case as the examination in this field is not the most outrageous utmost of RAC has not yet been investigated. In this investigation the reused total was utilized as supplanting with 20%, 40%, 60% and 80% by substitution of typical aggregate. Standard Ordinary Portland cement was supplanted with 10% of mineral admixture silica fume. Tests were coordinated to choose the mechanical properties and durability properties such us rapid chloride penetrability test and water sorptivity test. The results show that increasing the recycle aggregate percentage above 40% with natural aggregate, small modifications to the mix design may be adopted to secure that comparable property to natural aggregate concrete is attained

Download Full-text

A Review of the Durability of Recycle Aggregate Concrete

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.744-746.1357 ◽

2015 ◽

Vol 744-746 ◽

pp. 1357-1360 ◽

Cited By ~ 1

Author(s):

Hong Bo Liu ◽

Jing Sun ◽

Xiao Hong Cong

Keyword(s):

Drying Shrinkage ◽

Present Situation ◽

Recycled Aggregate Concrete ◽

Recycled Aggregate ◽

Recycle Aggregate ◽

Freezing And Thawing ◽

Chloride Permeability ◽

Technical Problems ◽

Aggregate Concrete ◽

Related Literature

Analyzing the related literature at home and abroad, this paper summarized the results and shared them with reasearchers involved in the field on the recycled aggregate concrete (RAC). In this paper, the durability of RAC will be described from the following several aspects: absorption, chloride permeability, freezing and thawing resistance, carbonation, the sulfate corrosion resistance, drying shrinkage, creep and abrasion resistance. This paper expounded the present situation and progress in the study of the durability of recycled aggregate concrete.Then, some key technical problems needed to be studied were pointed out and many suggestions were put forward.

Download Full-text

Leaching Behaviour of Organic Materials in Reinforced Concrete Artificial Reef with RAC

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.708.76 ◽

2016 ◽

Vol 708 ◽

pp. 76-82

Author(s):

Noridah Mohamad ◽

Abdul Aziz Abdul Samad ◽

Afif Iman ◽

Hazel Monica ◽

Josef Hadipramana ◽

...

Keyword(s):

Compressive Strength ◽

Reinforced Concrete ◽

Water Sample ◽

Total Phosphorus ◽

Compression Strength ◽

Fish Habitat ◽

Artificial Reef ◽

Recycle Aggregate ◽

Aggregate Concrete ◽

Leaching Behaviour

This paper reports the leaching behaviour of pineapple skins incorporated in the artificial reef fabricated from recycle aggregate concrete. Pineapple skin was mixed with the concrete as added material which produce nutrients to attract fish habitat. Material test was conducted on the concrete reef specimens to determine its compressive strength. The nutrients dispersed were measured by using total phosphorus and nitrate test of the water sample collected from each of the artificial reef within the six days duration. Results showed the compression strength of the reef decreased with the increase of percentage pineapple skin used. However, it was found that the total phosphorus and nitrate leached from the reef increased gradually with time as the percentage of pineapple skin used increased.

Download Full-text