Recycled Aggregate Selfcuring Highstrength Concrete

Mined sand requires washing and grading before it is added to aggregate, cement and water to make concrete. "We have found that substituting sand with ground recycled glass makes the polymer concrete stronger and is a sustainable use of one of the major types of recyclables in the domestic waste stream.

6.2—Definition of lightweight-aggregate concrete 6.3—Low-density concretes and associated aggregates 6.3.1—Structural lightweight concrete and associated aggregates 6.3.2—Moderate-strength lightweight concrete and associated aggregates 6.3.3—Properties Chapter 7—Recycled aggregates, p. E1-23 7.1—Introduction to recycled aggregates

to make high-strength concrete, it is easier to do so with coarse aggregates below 12.5 mm (Y, in.) (ACI 363-95). There has not been much research on the effects of coarse aggregate content

Apr 12,  · Natural coarse aggregate and recycled aggregate were added to the concrete in the following way: 33% mass of coarse aggregate—2.0–4.0 mm fraction size; 67% mass of coarse aggregate—4.0–8.0 mm fraction size. Waste aggregate was classified as RCAC II (aggregate from concrete rubble), according to the RILEM classification [7].

This paper presents the experimental results of a study on comparing the difference in properties of recycled aggregates (RAs) with varying amounts of old adhered mortar obtained from different sources and evaluating the influence of the different RAs on the mechanical and durability properties of recycled aggregate concrete (RAC).

Self-cured concrete is a type of concrete with a special ability to reduce autogenous shrinkage responsible for early-stage cracking. It is useful generally for the construction of high rise buildings and bridges. The application and use of this technique of curing concrete, however, depends on the level of awareness among stakeholders regarding the application of the technique and its

Industrial wastes are often used as aggregate in concrete production to promote a more sustainable construction and to reduce production costs. This article presents the results of an experimental campaign on the influence of replacing natural aggregate with several construction and demolition wastes (C&DW) as recycled aggregate, as well as the use of fly ash and slag, wastes produced in

High Strength Concretes (HSC) with extremely low water to binder (w/b) ratios are characterized by high cracking sensitivity which is a consequence of increased autogenous shrinkage. The major reason for autogenous shrinkage—self-desiccation—cannot be eliminated by traditional curing methods. The application of the concept of internal curing by means of saturated lightweight aggregate was

The recycled aggregates are designed to be used from 0% to 100% in the specimens. Spiral reinforcement is varied up to 1.75% and 1,430 MPa for the steel ratio and yield strength of spiral, respectively. Furthermore, cover concrete and longitudinal reinforcement are neglected to estimate the pure capacity of recycled aggregate concrete confined

Use of Recycled Aggregates in High Strength Fibrous Concrete for Sustainable Development more. by Kodukula Jagannadha Rao. The depleting sources of natural aggregate and disposal problem of demolished waste have prompted the researchers to take up studies on the use of Recycled Concrete Aggregate (RCA) in structural concrete.

Behavior of recycled aggregate concrete-filled basalt and carbon FRP tubes.

The results of 30 pullout tests carried out on 8-mm and 10-mm dia. deformed steel bars concentrically embedded in high-strength recycled aggregate concrete with coarse recycled concrete aggregate (RCA) replacement levels of 25%, 50%, 75% and 100% are reported.

The use of recycled aggregates in concrete production presents a great environmental benefit through savings from the extraction of natural aggregates and the reduction of dumped material. The advantages associated to the use of both concrete with recycled aggregates and self-compacting concrete have boosted an increase in research and a

2% and PVA of dosage of 1% was optimum by giving strength on par with conventional concrete. The results indicate that self-curing concrete performs similar to the conventional concrete in all aspects of durability. IndexTerms - recycled aggregate, concrete properties,Poly ethylene glycol (PEG-600), Poly vinyl alcohol (PVA),

Recycled aggregate is a valuable resource in Korea in lack of natural aggregate. Government recognizes the importance and suggests various policies enhancing its use for higher value-added application. Most of recycled aggregate produced currently in Korea, however, is applied for low value-added uses such as embankment, reclamation, etc.

Concrete is made by mixing an aggregate such as gravel with water and cement. Once the mixture has cured, the cement hardens, and binds with the aggregate to form a solid block of material.