journal of aggregate concrete
Effect of the Aggregate Size on Strength Properties of ... - Hindawi
2.2. Mixture Proportion and Experiment Specimen. As shown in Table 2, the water to cement ratios of 0.47 and 0.53 are determined depending on the mixture proportions of control concrete.Mixture proportion of recycled aggregate concrete is obtained by using recycled coarse aggregate as the same weight to replace the natural aggregate of the control …
aggregate Topic - American Concrete Institute
Aggregate. Definition: granular material, such as sand, gravel, crushed stone, crushed hydraulic-cement concrete, or iron blast-furnace slag, used with a cementing medium to produce either concrete or mortar.-. ACI Concrete Terminology. Aggregates are the major constituent (ingredient) in concrete, making up 60% to 70% of the volume of concrete.
Special Issue "Advances in Lightweight Aggregate …
Special Issue Information. Lightweight aggregate concrete (LWAC), usually characterized by densities less than 2000 kg/m 3 and thermal conductivity coefficients up to 1.0 W/m °C, is a lighter and more energy …
Aggregate in Concrete - Concrete Network
Aggregates are generally thought of as inert filler within a concrete mix. But a closer look reveals the major role and influence aggregate plays in the properties of both fresh and hardened concrete. Changes in gradation, maximum size, …
Special Issue "Aggregate Concrete Materials in Constructions"
Aggregate concrete plays a very important role in both underground engineering support and ground building structures. Aggregate concrete is one of the most important civil engineering materials. It is made up of cementitious materials, aggregates, water, and admixtures in a certain proportion. Aggregate concrete has the characteristics of high ...
Critical Review of Recycled Aggregate Concrete Properties, Improvements ...
Journal of Materials in Civil Engineering / Volume 32 Issue 11 - November 2020. Critical Review of Recycled Aggregate Concrete Properties, Improvements, and Numerical Models ... Although the properties of recycled aggregate concrete are widely considered to be inferior to those of natural aggregate concrete, research in the field still is of ...
Recycling of Brick Aggregate Concrete as Coarse Aggregate | Journal …
Based on this investigation, it is revealed that recycled brick aggregate can be used as coarse aggregate for making concrete of strength 20.7 to 31.0 MPa. For the same mix design, the recycled aggregate concrete produces almost similar strength compared with the first class brick aggregate concrete commonly used in Bangladesh.
Aggregates for Concrete
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
Special Issue "Aggregate Concrete Materials in Constructions"
Aggregate concrete is one of the most important civil engineering materials. It is made up of cementitious materials, aggregates, water, and admixtures in a certain proportion. Aggregate concrete has the characteristics of high compressive strength, good durability, and wide range of strength grades.
Impact Properties of Recycled Aggregate Concrete with ... - Hindawi
The optimal soaking time and nanosilica concentration were chosen by the physical properties of the nanosilica-modified recycled aggregate. Recycled aggregate concrete (RAC) and nanosilica recycled aggregate concrete (SRAC) were fabricated by using ordinary recycled aggregate and nanosilica-modified recycled aggregate. Based on the comparative …
Cement Concrete and Aggregates - ResearchGate
The concrete microbars are 40 by 40 by 160 mm. The aggregate is graded to pass a 12.5 mm sieve and be retained on a 4.75 mm sieve. The water to cement ratio is 0.33. The length of the test is 30 ...
Engineering Properties of Geopolymer Aggregate Concrete | Journal …
The GPA concrete demonstrates low water and air permeability indicating that the material is a high-quality concrete with a dense pore structure. Overall, GPA investigated in this research shows potential as a lightweight coarse aggregate in portland cement concrete, with the significant additional benefit of addressing and reducing the ...
Recycled Concrete Aggregates: A Review | International …
International Journal of Concrete Structures and Materials 7, 61–69 ( 2013) Cite this article 40k Accesses 221 Citations 8 Altmetric Metrics Abstract This paper discusses the properties of RCA, the effects of RCA use on concrete material properties, and the large scale impact of RCA on structural members.
Use of fine recycled concrete aggregates in concrete: A critical …
Journal of Building Engineering. Volume 38, June 2021, 102196. ... It is desirable to use recycled concrete aggregates in concrete production as long as it is cheaper than natural aggregate and does not increase the demand for expensive constituents of concrete, particularly cement.
A STUDY ON RECYCLED CONCRETE AGGREGATES
the recycled aggregate concrete is almost 85% and 80% of natural aggregate concrete. Amn on.et.al (2002), concrete having a 28 -day compressive strength of 28 MPa was crushed at ages 1, 3 and 28 days to serve as a source of aggregate for new concrete, simulating the situation prevailing in precast concrete plants. The properties of the
Durable Performance of Recycled Aggregate Concrete in …
Recycled aggregate concrete is an eco-friendly material that is increasingly being used in new constructions. Nowadays, this application is mainly limited by user's lack of confidence, as coarse recycled aggregate (CRA) is usually more porous, i.e., it has a higher water absorption, than coarse natural aggregate.
Effect of Aggregate on the Fire Resistance of Concrete
A variety of aggregates is used for concrete production. This article provides the analysis of the most frequent types of concrete aggregates, which are: gravel, dolomite, granite, and expanded clay. ... O. Arioz, Effects of elevated temperatures on properties of concrete, Fire Safety Journal, Vol. 42, pp. 516-522, 2007.
Utilization of Recycled Aggregate Concrete for Marine
This research aimed to create value of construction and demolition waste to be able used as a recycled coarse aggregate (RCA) in durable concrete, based on 7-year field investigation in marine site. Fly ash was used to substitute Portland cement type I in RCA concrete varied from 0 to 50% by weight of binder with three W/B ratios and comparing to …
Strength and durability of concrete containing recycled …
Journal of Building Engineering. Volume 19, September 2018, Pages 349-365. ... Recycled concrete aggregates can be used as a sustainable alternative to natural coarse aggregates in concrete and up to 25% of the natural coarse aggregates can be replaced with RCA. For higher values of replacement ratio, modification in the concrete mix design ...
Strength and Durability Evaluation of Recycled Aggregate Concrete ...
Recycled aggregate concrete: A sustainable built environment. Paper presented at the ICSBE: International conference on sustainable built environment. Ryou, J. S., & Lee, Y. S. (2014). Characterization of recycled coarse aggregate (RCA) via a surface coating method. International Journal of Concrete Structures and Materials, 8(2), 165–172.
Experimental Study on Properties of Lightweight Sandwich Concrete ...
Substituting partially M sand and coarse aggregate by inserting EPS Sheet, to achieve decent compressive strength and water absorption result. This project focus on investigating the characteristics of M25 grade concrete. The EPS Sandwich Concrete Block is a new creation block, in which Expanded Polystyrene (Thermocol) material is used.
Lightweight Aggregate Concrete Market Size Is Grow 4.5 Billion …
The Low Density Concrete Segment Of Lightweight Aggregate Concrete Accounted For The Most Significant Market Share In 2018. It Is Projected To Maintain Its Lead With A Significant CAGR During The ...
Partial Replacement of Fine Aggregate in Concrete by Tyre …
Malek K. Batayneh et al, (2008).A research was carried out to find a positive method for disposing non-decaying materials, such as reuse in concrete mixes. Crumb rubber was used in the concrete mix to partially substitute for fine aggregate (sand) in various percentages of 20%, 40%, 60%, 80%, . For each mix, cubes of 100x100x100 mm ...
An Investigation on Aggregate Distribution in Concrete | Dilbas ...
As a result, the falling behavior of the aggregates in concrete is found in relation with Pi as similar as falling needles. Pi is calculated as "3.139534884…" with a very small error while Pi is "3.141592654…". In addition, it is found that mould edges cause a wall effect decreasing aggregate concentration near the edges.
Effect of Aggregate Roughness on Strength and Permeation ... - Hindawi
This paper aims to examine the effect of surface roughness of lightweight aggregate particles (LWA) on the strength and permeation characteristics of lightweight aggregate concrete (LWAC). Changing the smooth surface texture of LWA particles was achieved by applying surface polishing to make rough texture of the aggregate particle …
Strength and durability of concrete containing recycled concrete aggregates
Journal of Building Engineering. Volume 19, September 2018, Pages 349-365. ... Recycled concrete aggregates can be used as a sustainable alternative to natural coarse aggregates in concrete and up to 25% of the natural coarse aggregates can be replaced with RCA. For higher values of replacement ratio, modification in the concrete mix design ...
Cement Concrete and Aggregates - ResearchGate
The aggregate is graded to pass a 12.5 mm sieve and be retained on a 4.75 mm sieve. The water to cement ratio is 0.33. The length of the test is 30 days in 1 M sodium hydroxide (NaOH) at 80°. The...
Materials | Special Issue : Recycled Aggregate Concrete …
Materials, an international, peer-reviewed Open Access journal. Journals Topics. ... For full incorporation of coarse recycled concrete aggregates and the design of elements without shear reinforcement, the calibrated partial factor reduces the design value of shear resistance by 10% (design with EN1992) or 15% (design with prEN1992) in ...
Aggregate - Wiley Online Library
Aggregate aims to publish on a wide variety of topics that focus on the processes of aggregation of atoms, ions, molecules, oligomers, polymers, clusters, particles, gels, hybrids, composites, cells, pathogens, etc. in a broad range of areas such as chemistry, physics, materials, engineering, biology, life science and so forth.
Cement, Concrete and Aggregates 1979-2004 Backfile - ASTM …
About this journal. Cement, Concrete & Aggregates 1979-2004 Backfile deals with the properties of concrete and its constituent materials (e.g., mechanical properties, durability, and cement). New developments in control testing, evaluation, and standardization of such properties. NOTE: This journal ceased publication in 2004.
Application of Preplaced Aggregate Concrete to …
Preplaced Aggregate Concrete (PAC) is referred to a kind of concrete making by first placing coarse aggregate in the formwork and then injecting a sand-cement mortar to fill the voids imprisoned between the coarse aggregate …
Influence of Lightweight Aggregates on Various Properties of Concrete
The outcomes showed that with 20% OPS and 80% granite a grade 35 OPS lightweight geopolymer concrete has 14% lighter than normal weight concrete. Alqahtani et. al. [9] have conducted an analysis with constructed plastic aggregate as a replacemnt of volcanic lightweight aggregate and Lytag aggregate.
Studies on Hemp and Recycled Aggregate Concrete
This paper reports on the first phase of a multi-phase research program conducted at the American University of Beirut (AUB) on "Hemp and Recycled Aggregates Concrete" (HRAC). HRAC is a new sustainable concrete material where hemp fibers are incorporated in the mix, the coarse aggregate content is reduced by 20% of the concrete volume, and 50% of …