VALIDATION OF ULTRASONIC PULSE TO QUALITY CONTROL OF RECYCLED AGGREGATE SELF-COMPACTING CONCRETE

Víctor Revilla-Cuesta, Amaia Santamaría, Ana B. Espinosa, José A. Chica, Juan M. Manso, Vanesa Ortega-López

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

One of the main operations in any civil work is to verify that the concrete supplied and placed on site reaches the required minimum compressive strength. This verification is usually performed statistically through the preparation and testing of a large number of specimens. However, its indirect control is also useful due to its simplicity, ease of execution, and low cost. One of the most common methods to perform this operation is the measurement of the Ultrasonic Pulse Velocity (UPV) of the cast concrete, checking that its value corresponds to the necessary concrete’s strength class. This study aims to analyze whether this indirect measurement, widely used in vibrated concrete produced with natural aggregate, is also valid when large quantities of Recycled Concrete Aggregate (RCA) are added to Self-Compacting Concrete (SCC). For this purpose, six SCC mixes were produced with 100% coarse RCA and variable fine RCA contents (0%, 50%, and 100%). In addition, two different types of powder were used: Limestone filler <0.063 mm and limestone fines 0/0.5 mm. The determination of the compressive strength and the UPV at 7 and 28 days in all mixes allowed demonstrating the existence of a close relationship between these two magnitudes in this type of concrete. It was even possible to develop highly accurate simple-regression models to interrelate both variables. These findings show that the use of SCC with RCA in engineering works would still allow the control of compressive strength using one of the most common traditional techniques, the ultrasonic pulse.

Original languageEnglish
Title of host publicationREHABEND 2022 - Construction Pathology, Rehabilitation Technology and Heritage Management
EditorsHaydee Blanco, Yosbel Boffill, Ignacio Lombillo
PublisherUniversity of Cantabria - Building Technology R&D Group
Pages761-769
Number of pages9
ISBN (Print)9788409422524
Publication statusPublished - 2022
Event9th Euro-American Congress on Construction Pathology, Rehabilitation Technology and Heritage Management, REHABEND 2022 - Granada, Spain
Duration: 13 Sept 202216 Sept 2022

Publication series

NameREHABEND
ISSN (Print)2386-8198

Conference

Conference9th Euro-American Congress on Construction Pathology, Rehabilitation Technology and Heritage Management, REHABEND 2022
Country/TerritorySpain
CityGranada
Period13/09/2216/09/22

Keywords

  • Compressive strength
  • On-site quality control
  • Recycled concrete aggregate
  • Self-compacting concrete
  • Ultrasonic pulse velocity

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