Investigation Of Adhered Mortar Content On Recycled

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Investigation of Adhered Mortar Content on Recycled ...

The obtained data indicated that IAM is an accurate and efficient method to measure the proportion of adhered mortar or other phases; the highest content of adhered mortar was found in recycled aggregate with a size of 10.0–16.0 mm, up to 39.39%; the percentage of the recycled aggregates with a particle size between 16.0 and 20.0 mm should be increased in the mix proportion, which has less ...

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Investigation of Adhered Mortar Content on Recycled ...

The adhered mortar attached on the surface of recycled aggregate is the primary difference between recycled aggregate and natural aggregate, and is the major reason for reducing its mechanical properties. To measure the percentage of adhered mortar, an

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Investigation of Adhered Mortar Content on Recycled ...

AbstractThe adhered mortar attached on the surface of recycled aggregate is the primary difference between recycled aggregate and natural aggregate, and is the major reason for reducing its mechani...

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Investigation of Adhered Mortar Content on Recycled ...

28/06/2021  Then, the effect of recycled aggregate size on the percentage of adhered mortar, and the characteristic of recycled aggregate was explored by IAM. In addition, the type and optimal size of recycled aggregate were also investigated. The obtained data indicated that IAM is an accurate and efficient method to measure the proportion of adhered mortar or other phases; the highest content of adhered ...

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Effects of Adhered Mortar Content on Quality of Recycled ...

Experimental Investigation Properties on Resistance of Slag Cement Concrete to Sulfate Attack p.1049. Research on Mechanical ... In conclusion, the upper limit of adhered mortar content of recycled coarse aggregate is considered to be 15%, in order to keep up the quality of coarse aggregate and properties equal to natural coarse aggregate. Access through your institution. Add to Cart. Info ...

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Microstructural investigation of recycled aggregate ...

01/04/2020  One of the major reasons may be due to presence of two interfacial transition zones (ITZs): old ITZ (region between old mortar and virgin aggregate) and new ITZ (region between new mortar and recycled aggregate/virgin aggregate). The old ITZ has lots of pores and cracks which negatively affects the mechanical properties of RAC.

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Quantification of the residual mortar content in recycled ...

01/07/2009  In order to validate the results obtained by that laboratory test procedure, image analysis was used to quantify the residual mortar content in the different size fractions of the recycled concrete aggregates tested.

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Effects of Adhered Mortar Content on Quality of Recycled ...

Experimental Investigation Properties on Resistance of Slag Cement Concrete to Sulfate Attack p.1049. Research on Mechanical ... In conclusion, the upper limit of adhered mortar content of recycled coarse aggregate is considered to be 15%, in order to keep up the quality of coarse aggregate and properties equal to natural coarse aggregate. Access through your institution. Add to Cart. Info ...

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Microstructural investigation of recycled aggregate ...

01/04/2020  In this mix design method, the residual mortar contain which is adhered to the recycled concrete aggregate is the part of total mortar required for the mix design and this allows 61.01% of substitution of RCA for getting better performance of NVRAC. Microstructural investigation through BSE image and WDS analysis is done to justify the reason of improvement of properties of concrete of

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Optimal Allowable Residual Mortar Content in Recycled ...

Optimal Allowable Residual Mortar Content in Recycled Aggregates Crushed from Parent Concrete Implementing Different Waste Materials. American Journal of Earth and Environmental Sciences. Vol. 1, No. 1, 2018, pp. 26-33. Received: January 17, 2018; Accepted: February 7, 2018; Published: March 2, 2018 Abstract: The reuse of certain industrial and construction waste materials as a substitute to ...

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Mix Design Method for Self-Compacting Recycled Aggregate ...

03/03/2020  This article is on the development of a mix design method for self-compacting recycled aggregate concrete (SCRAC) by considering the adhered mortar content (AMC) on the surface of the aggregate. In this method of mix design, the acceptable percentage of recycled concrete aggregate (RCA) depends on the AMC value. Five different batches of design mixes were prepared, including

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Quantification of the residual mortar content in recycled ...

The carbonation behavior of RAC was determined by the properties and content of the new mortar rather than the adhered old mortar of the recycled aggregate [117]. Thus, the

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Enhancement of recycled aggregates and concrete by ...

29/03/2021  The adhered mortar of RCA was selected as an AOI in each type of RAC and the porosity values are shown in Fig. 8. The porosity of the adhered mortar of RAC was higher than that of C-RAC and WW-C-RAC. And the porosity of the adhered mortar of WW-C-RAC was lower than that of C-RAC. Because RAC only contained the raw RCA, whose porosity of 11.8% ...

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Experimental Study of the Heating Potential of Mortar ...

07/07/2021  Microwave heating is a novel and promising method to remove mortar that adheres to aggregates in recycled concrete. A systematic experiment was carried out to evaluate the heating results of mortar-aggregate composite materials after microwave heating with different power and irradiation times. It was revealed that the surface temperature and heating rates of the mortar and aggregate

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Investigation of Strength and Durability of Steam Curing ...

adhered mortar on RA are not cost effective and of low efficiency to enlarge its practical application in concrete production. Recently, related specification (JIS A5022) on the coarse aggregate has been modified in which L-grade or the lowest grade RA can be used mixing with natural coarse aggregate for recycled aggregate concrete (RAC).

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Sustainable production of recycled concrete aggregates by ...

25/01/2021  In this investigation, when MRCA was immersed in lime (quicklime) solution, the heat generated due to an exothermic reaction between quicklime and water puffed up the MRCA resulting in the removal of a portion of adhered mortar. The higher the concentration of lime solution was, more was the removal of old mortar. As a result, the compressive strength of LMRC was improved. Eventually, it ...

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Investigation of thermal performance of concrete ...

08/02/2021  It can be seen that the adhered mortar results in the inferior properties of RCA than NCA . Download : ... RCA were first pre-conditioned for a week at 25 °C and relative humidity of 50% to achieve the 40–70% moisture content of RCA , . Afterward, RCA were carbonated with 100% CO 2 concentration in a carbonation chamber of 100-liter capacity at a bar pressure of + 0.8 for one day . As a ...

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Effects of Adhered Mortar Content on Quality of Recycled ...

Experimental Investigation Properties on Resistance of Slag Cement Concrete to Sulfate Attack p.1049. Research on Mechanical ... In conclusion, the upper limit of adhered mortar content of recycled coarse aggregate is considered to be 15%, in order to keep up the quality of coarse aggregate and properties equal to natural coarse aggregate. Access through your institution. Add to Cart. Info ...

Get Price

Microstructural investigation of recycled aggregate ...

01/04/2020  In this mix design method, the residual mortar contain which is adhered to the recycled concrete aggregate is the part of total mortar required for the mix design and this allows 61.01% of substitution of RCA for getting better performance of NVRAC. Microstructural investigation through BSE image and WDS analysis is done to justify the reason of improvement of properties of concrete of

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Removal of Adhered Mortar from Recycled Aggregates Yadav ...

Adhered mortar present on recycled aggregates has been observed to adversely affect the performance of aggregates in concrete, thus its removal without affecting the properties of aggregate is essential. In this work a comparative study of various methods for removal of adhered mortar content is carried out and an effective removal method feasible for use on field is proposed. Keywords ...

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Methods for Determination of Residual Mortar Content ...

To study the methods for determination of residual mortar content adhered to recycled aggregate, this paper aims at three methods which are apparent density method, quench hot method and sulfate solution freezing-thawing method. These methods were compared by experiments and their basic principles were also respectively stated. The principles of the latter two methods are similar, which are to ...

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Optimal Allowable Residual Mortar Content in Recycled ...

Optimal Allowable Residual Mortar Content in Recycled Aggregates Crushed from Parent Concrete Implementing Different Waste Materials. American Journal of Earth and Environmental Sciences. Vol. 1, No. 1, 2018, pp. 26-33. Received: January 17, 2018; Accepted: February 7, 2018; Published: March 2, 2018 Abstract: The reuse of certain industrial and construction waste materials as a substitute to ...

Get Price

Quantification of the residual mortar content in recycled ...

The carbonation behavior of RAC was determined by the properties and content of the new mortar rather than the adhered old mortar of the recycled aggregate [117]. Thus, the

Get Price

Enhancement of recycled aggregates and concrete by ...

29/03/2021  The adhered mortar of RCA was selected as an AOI in each type of RAC and the porosity values are shown in Fig. 8. The porosity of the adhered mortar of RAC was higher than that of C-RAC and WW-C-RAC. And the porosity of the adhered mortar of WW-C-RAC was lower than that of C-RAC. Because RAC only contained the raw RCA, whose porosity of 11.8% ...

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Behaviour of confined recycled aggregate concrete under ...

01/11/2020  The brittle character of old mortar adhered to the surface of recycled aggregates leads to a lower modulus of elasticity in RAC as compared to NAC. It may be noted that the concrete quality is good because the UPV values are lies between 3.8 and 4.04 km/sec. The variation of strain with axial stress in both axial and lateral direction for NAC and RAC is evaluated using cylindrical concrete ...

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Investigation of Strength and Durability of Steam Curing ...

adhered mortar on RA are not cost effective and of low efficiency to enlarge its practical application in concrete production. Recently, related specification (JIS A5022) on the coarse aggregate has been modified in which L-grade or the lowest grade RA can be used mixing with natural coarse aggregate for recycled aggregate concrete (RAC).

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Proposed Method for Determining the Residual Mortar ...

27/12/2007  Proposed Method for Determining the Residual Mortar Content of Recycled Concrete Aggregates (Received 2 March 2007; accepted 27 November 2007) Published Online: 27 December 2007. CODEN: JAIOAD : Format: Pages: Price : PDF (592K) 12 $ 25: ADD TO CART: Cite this document Email Citation export citation print citation. X Add email address send. X .RIS For RefWorks, EndNote,

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