scholarly article on concrete aggregate

Properties of Concrete with Recycled Concrete Aggregate

The research presented in this article focuses on the technological conditions of using metallurgical waste in its original form and as a component of recycled concrete aggregate RCA The use of metallurgical sludge waste or crushed or round RCA to produce concrete deteriorates the consistency and does not significantly affect the air content...

Bond Behavior of Steel

Apr 16 2021 0183 32 Using recycled aggregate concrete RAC in steel-reinforced concrete structure is an effective way to eliminate the adverse effects of recycled aggregate which has an excellent application prospect Fire has a great destructiveness to steel-reinforced recycled aggregate concrete SRRAC structure hence the bond performance of SRRAC after high temperature as the prerequisite for the...

ASTM International

Cement Concrete and Aggregates 1979-2004 Backfile The Cement Concrete Aggregates 1979-2004 Backfile contains all issues of the journal from January 1979 through December 2004 Cement Concrete Aggregates deals with the properties of concrete and its constituent materials eg mechanical properties durability and cement It includes new developments in control testing...

Effects of Aggregate Type Size and Content on Concrete

The concrete mixtures incorporate either basalt or crushed limestone aggregate sizes of 12 mm h in or 19 mm Y in and coarse aggregate contents with aggregate volume factors ACI 2111-91 of075 and 067 Water-to-cementitious material ratios range from 024 to 050...

The Utilization of Recycled Materials for Concrete and

Pedro D de Brito J and Evangelista L 2017 Structural concrete with simultaneous incorporation of fine and coarse recycled concrete aggregates Mechanical durability and long-term properties Constr Build Mater 154 294-309 Nov Crossref Google Scholar...

What is a Concrete Aggregate with pictures

Feb 24 2021 0183 32 Using aggregate makes concrete much stronger with the aggregate acting as a type of reinforcement The aggregate increases the lifetime of the concrete and makes it more durable Contractors can choose from fine aggregates made from small particles of material and coarse aggregates which are made with large chunks...

Seismic Behavior of Recycled Aggregate Concrete Filled

Nov 07 2016 0183 32 This paper presents the results of seismic tests on the recycled aggregate concrete filled steel tube RCFS and recycled aggregate concrete filled glass fiber reinforced plastic GFRP tube RCFF columns The objective of this study is to evaluate the seismic behavior of steel/ GFRP tube in-filled recycled aggregate concrete RAC columns...

PETROGRAPHIC EXAMINATION OF CONCRETE AGGREGATES

Petrographic examination of concrete aggregates proposed for use on projects of the Bureau of Reclamation has assumed great importance as a supplement to standard empirical acceptance tests which are almost universally applied by large and progressive engineering organizations...

Geopolymer Recycled Aggregate Concrete From Experiments

Ordinary cement concrete is a popular material with numerous advantages when compared to other construction materials however ordinary concrete is also criticized from the public point of view due to the CO 2 emission during the cement manufacture and the consumption of natural resources for the aggregates In the context of sustainable development and circular economy the recycling of...

Durability Assessment of Recycled Concrete Aggregates for

Mar 18 2016 0183 32 This Phase II investigation into the durability of new concrete incorporating recycled concrete aggregates RCA focused on several goals 1 Provide corroboration of results obtained in Phase I for a multi-laboratory study related to assessing alkali-silica reactivity ASR of RCA in accelerated laboratory tests 2 Investigate the efficacy of mitigation methods to control ASR in concrete...

Effect of Aggregate Mineralogy and Concrete Microstructure

applied sciences Article Effect of Aggregate Mineralogy and Concrete Microstructure on Thermal Expansion and Strength Properties of Concrete Jinwoo An 1 S Sonny Kim 2 Boo Hyun Nam 1 and Stephan A Durham 2 1 Department of Civil Environmental and Construction Engineering University of Central Florida Orlando FL 32816 USA jinwooan knightsucfedu...

PDF Use of recycled concrete aggregate in concrete A review

Dec 24 2013 0183 32 The use of recycled concrete aggregate RCA in concrete as partial and full replacements of natural coarse aggregate is growing interest in the construction industry as it reduces the demand for...

Sustainable Recycling of High

Apr 12 2021 0183 32 The application of recycled coarse aggregates RCA in high-performance concrete HPC was analyzed in the article In the paper the behavior of HPC with coarse recycled aggregate and natural coarse aggregate NCA was compared Short-term experiments were conducted including concrete deformation deflection load bearing capacity and cracking of beams...

Mechanical properties of high strength semi

Oct 19 2016 0183 32 In this study in a high strength normal weight concrete normal coarse aggregate and fine aggregate were partially substituted with OPBC and fly ash respectively Test results showed that by using of these waste materials in concrete a semi-lightweight concrete with 28-day compressive strength of 68MPa could be produced...

PDF Recycled Aggregate Concrete as Structural Material

The main objective of this study is to determine the effect of using crushed concrete masonry units CMU with different contents 0 20 40 and 60 as coarse aggregate on the structural...

PDF Structural Concrete Using Oil Palm Shell OPS as

This paper presents part of the experimental results of an on-going research project to produce structural lightweight concrete using solid waste oil palm shell OPS as a coarse aggregate Reported in the paper are the compressive strength bond strength modulus of elasticity and flexural behaviour of OPS concrete It was found that although OPS concrete has a low modulus of elasticity...

Durability Assessment of Recycled Concrete Aggregates for

The primary goal of this research project was to investigate the long-term durability of concrete incorporating recycled concrete aggregate RCA through accelerated laboratory testing Overall it was found that modifications to standard aggregate testing and characterization standards were necessary for testing RCA This included modifications to standard tests including ASTM C 128 C 305 and...

PDF Mechanical and Durability Properties of Concrete

The presence of attached mortar is the main reason for lower quality of recycled concrete aggregate RCA compared to that of natural aggregate Hence its use is limited up to 30 replacement of natural aggregate at present The attached mortar of the RCA can be removed by mechanical treatment acid treatment thermal treatment 500 to 750 176 C 932 to 1382 176 F and microwave treatment...

Microstructural Characterization of Concrete Prepared with

The shape of the curves obtained for concrete with aggregate substitution is comparable to that of natural aggregate concrete As expected Domone Reference Domone and Illston 1998 there is a continuous distribution of pore sizes ranging from 0006 to 350 μm in the studied mortars with two maxima at both ends...

Microstructural Characterization of Concrete Prepared with

The used raw materials were natural aggregate recycled aggregate obtained from a standard concrete and Portland cement The substitution extent was 0 10 50 and 100 vol hydration was stopped at 9 24 and 96 h and 28 days...

STUDY OF THE ANTI

May 30 2018 0183 32 deep penetration experiments were performed on five types of concrete with different coarse aggregate content the projectile diameter was 299 mm the initial velocity was 647 m/s and the volume fraction of the coarse aggregate was between 0 and 590 the damage laws and damage mechanism of the target were analyzed the pure mortar target had the smallest radial crack origin...

The durability of concrete containing recycled tyres as a

Yong-chang G Jian-hong Z Guang-ming C and Zhi-hong X 2014 Compressive behavior of concrete structures incorporating recycled concrete aggregates rubber crumb and reinforced with steel fiber subjected to elevated temperatures J Clean Prod 72 193-203 Crossref Google Scholar...

Cement and Concrete Research

The aim of Cement and Concrete Research is to publish the best research on the materials science and engineering of cement cement composites mortars concrete and other allied materials that incorporate cement or other mineral binders In doing so the journal will focus on reporting major results of research on the properties and performance of cementitious materials novel experimental...

Aggregates

Crushed aggregate is produced by crushing quarry rock boulders cobbles or large-size gravel Recycled concrete is a viable source of aggregate and has been satisfactorily used in granular subbases soil-cement and in new concrete After harvesting aggregate is processed crushed screened and washed to obtain proper cleanliness and gradation...

Advances in coral aggregate concrete and its combination

2020 c Strength and chloride ion distribution brought by aggregate of basalt fiber reinforced coral aggregate concrete Construction and Building Materials 234 117390 Google Scholar Crossref...

How Concrete is Made

Aggregates comprise 60 to 75 percent of the total volume of concrete The type and size of aggregate used depends on the thickness and purpose of the final concrete product Relatively thin building sections call for small coarse aggregate though aggregates up to six inches in diameter have been used in large dams...

Manufacturing of sintered lightweight aggregate using high

Jan 20 2016 0183 32 Lightweight aggregate concrete LWAC is an important and versatile building material in all areas of construction worldwide The application of synthetic lightweight aggregate is becoming as important as the use of normal weight aggregate NWA because the resources of natural normal weight aggregate are diminishing...

Manufacturing Light Concrete with PET Aggregate

The manufacture of concrete using a polymer instead of a stony coarse aggregate known as gravel is presented Polyethylene terephthalate PET is the polymer used recycling soft drink containers with sufficient tenacity PET is a material commonly used by engineers as a structural element not as an aggregate The research work revealed that PET aggregate produces good quality mixtures with...

Aggregates for Concrete

Sieve sizes commonly used for concrete aggregates are detailed in Table 1 and various physical properties of normalweight aggregates with typical range values are shown in Table 2 Coarse and fine aggregates are generally sieved separately That portion of an aggregate passing the 475 mm No 4...

PDF Properties of concrete made with crushed concrete as

Oct 18 2020 0183 32 Effects of using recycled concrete of different qualities as coarse aggregate upon the strength and deformation of concrete are reported Tests on the aggregates showed that the recycled concrete...

Concrete Aggregates Industry to Thrive 5 Stocks in

Mar 08 2021 0183 32 5 Concrete Aggregates Stocks to Keep a Close Eye On US Concrete Inc Based in Euless TX this company produces and sells ready-mixed concrete aggregates and concrete...

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