The windsor hp probe system rapidly and accurately determines the concrete compressive strength of a structure by driving a probe into the concrete with a known amount of force. The system consists of a powderactuated gun, which drives. Probe penetration resistance is affected by concrete strength as well as the nature of the coarse aggregate. Such a relationship must be established for a given test apparatus see also 9. Malhotra, evaluatio n o f t he windsor probe test for estimating compr essive strength of concrete, rilem materials and structures, vol. The probe is driven into concrete by firing a powder charge that develops energy of 575 lbs ft. Evaluation of the windsor probe test for estimating compressive. In march and april 1968, a test program was conducted in the laboratory of the bureau of public roads now federal highway administration, the prime purpose of. The windsor probe test does damage the concrete, leaving a hole of about 0.
A series of concrete specimens prepared from aggregates having a variety of mohs hardness values and also specimens using an aggregate with a consistent class of mohs hardness were prepared. The windsor probe test has been approved by federal, state and municipal. Home concrete strength testing windsor probe windsor probe. Penetration resistance test astm c 803 engineersdaily. The objective of this study is to evaluate the use of the windsor probe test astm c 803 to nondestructively determine the in situ compressive strength of normal and highstrength concrete. The standard windsor probe system includes a depth gauge and strength chart for determining the concrete strength.
Also, two standard power settings facilitate testing fresh concrete as well as mature mixes. Wpa1 silver probes are used for penetration tests in normalweight concrete with strengths from 3,000 to 17,000psi 20. Windsor probe test is a test system designed to evaluate the compressive strength of concrete in place. However, windsor probe test is based on both hardness of the surface hardness and hardness of concrete components. The windsor probe test system for concrete compressive strength has been certified for european safety via safenet limited. Penetration tests on concrete windsor probe system non.
Owners, maintenance managers of such existing concrete structures normally prefer nondestructive and nonintrusive methods to avoid further damage to an already struggling structure. The nondestructive system is used on both fresh and mature concrete, either horizontally or vertically. It conforms to the following tests, specifications and practices. This test is done to assess the penetration resistance of concrete.
Penetration resistance test is conducted on concrete structures using windsor probe test machine. Other parameters that affect test results include the type, size, and distribution of coarse aggregate, and the location of embedded reinforcing steel. Wisdot structures inspection manual part 5 chapter 19. C803c803m97c1, standard test method for penetration resistance of hardened. A series of specimens fabricated by aggregates having. The effect of the aggregate hardness is taken care of by using. The tests were carried out on slabs of normal weight and lightweight concrete, having a strength of 570 nsq. Experimental research was carried out to investigate the influence of aggregate hardness on windsor probe test results. Astm c803 standard test method for penetration resistance of hardened concrete. While rebound hammer, capopullout, windsor probe and ultrasonic pulse velocity tests give indirect evidence of concrete.
Steel pins are smaller in size than probes and are driven by a lowenergy, springactuated driver. The windsor hp probe system is used to evaluate the compressive strength of inplace concrete. Nondestructive evaluation methods for quality acceptance of installed building materials james r. Both are used exclusively with windsor probe test systems to determine penetration resistance of concrete to estimate inplace strength. Oct 02, 2017 penetration test windsor probe test on hardened concrete. Windsor hp probe astm c803 for inplace testing of normal and highperformance concrete windsor hp probe measures the compressive strength of concrete accurately and effectively, on site in the field. The system features an electronic measuring device for accuracy and efficiency. Windsor probe test system featured in history channels. The windsor probe system has been modified to conform to the updated astm c803 safety and specification requirements. Estimation of concrete strength combining rebound hammer. High accurate results will be obtainedwith the combined method. This nondestructive test can be used on fresh or mature concrete with equal effectiveness. Ndt tests were performed on concrete walls, slabs, and cylinders constructed under. Evaluation of the windsor probe test for estimating.
The system performs equally well on standard and high performance concrete. Non destructive test system for concrete compressive strength in the field. The windsor probe test is considered a surface test. Standard test method for penetration resistance of hardened. Rebound hammer and windsor probe tests are among the most widely. With the chuck on both the micrometer and the pin driver, flat surfaces can be easily and accurately. An extractor is supplied to facilitate probe removal after the test. Pdf experimental research was carried out to investigate the influence of aggregate hardness on windsor probe test results. The windsor probe penetration resistance is based on measuring the penetration of probes driven into the concrete using a gunpowder actuated charge. The driver can only be discharged by pushing firmly against the actuating template during a test. Windsor probe test for nondestructive evaluation of normal. The windsor probe test has been approved by federal, state and municipal agencies as well as a number of foreign countries in asia and europe.
This paper describes an investigation to evaluate the windsor probe test for estimating compressive strength of concrete. Consult james instrumentss entire windsor probe test system. Technical the windsor hp probe system is designed to evaluate the compressive strength of concrete in place. Windsor probe test system ndt and inspection product and. It is non destructive and can be used with equal effectiveness on fresh and mature concrete. Windsor probe test is also used for assessment of surface zone strength of concrete. The course is part of nrmcas seminar, training and education programs steps, and it is required for the concrete technology career track. The windsor probe test system is a non destructive test system for concrete compressive strength in the field. Windsor probe test system, less destructive to the concrete surface, and capable of providing a much greater nuinber of tests in a given area. Laboratories should be proficient in acceptance testing is the process of testing representative samples of concrete furnished to a project. Each certified probe kit includes 3 probes and 3 matched, nickelplated power loads. Tests were performed on 11 mixes with strength varying between 2240 and 18,820 psi 15 and mpa. It is nondestructive and can be used with equal effectiveness on fresh and mature concrete.
Pins are intended to penetrate the mortar fraction only. For every test three probes come fixtures and the result of the test is constituted from the average of the three measures carried out. In this paper, rebound hammer and windsor probe test results were combined to determine the compressive strength of concrete using respond surface method. Nondestructive evaluation methods for quality acceptance of. Windsor probe for testing concrete compressive strength. Equally accurate results are obtained on horizontal or vertical surfaces provided that the probe is perpendicular or at right angles to the test surface.
If the length is reduced sufficiently and the pin goes through the gauge, the pins should be replaced. Penetration resistance test the windsor probe test. Windsor probe system 3 the specimes a total of 6 concrete specimens 600x600x200mm was designed and fabricated at the laboratory of the faculty of. The penetration test, typically utilizing the windsor probe test system, consists of a device that drives a probe into the concrete using a constant amount of energy. Pdf strength assessment of insitu concrete for the. Windsor probe test system certified for european safety.
Jul 29, 2009 experimental research was carried out to investigate the influence of aggregate hardness on windsor probe test results. We offer complete sales, service and calibrations from our locations throughout canada including electronic, electrical, hydraulic to 10,000 psi and mechanical onsite calibrations to c. The penetration is inversely proportional to the strength of concrete. Concrete cores are used for testing of actual properties of concrete in existing structures such as strength, permeability, chemical analysis, carbonation etc. Penetration resistance or windsor probe test, used to measure the surface hardness and hence the strength of the surface and near surface layers of the. In this test method, a steel probe is fired on the concrete surface by a sudden explosion. The method of testing is that a steel probe which is hardened steel alloy with 6. Pdf estimation of concrete strength combining rebound hammer.
Estimation of concrete strength combining rebound hammer and. The models once prepared were subjected to penetration tests. If the quality of grouted masonry is questionable there are other means availbale to test besides the windsor probe, include cutting out prisms and breaking them, or using a flatjack. Break off test is used for assessment of compressive strength or flexural strength of concrete. This is an economical alternative for many concrete test environments. The windsor probe equipment consist of cartridge, depth gauge for measuring penetration of probes and other related equipment. Windsor probe system nondestructive concrete testing equipment. Actuating load the driver with a power load and probe suited for the type of concrete being examined. Windsor probe for grout correlation henri2 materials 7 apr 06 16. The windsor probe test has been approved by federal, state and municipal agencies as well as a number of foreign countries. It utilizes a special handgun to drive the probes into the concrete. Pdf windsor probe strength tables leo messi academia. Therefore, deleterious effects such as carbonation affecting surface hardness can result in inaccurately high test values. Civil engineering animated videos, civil engineering videos.
Safe, quick, and simple to use it is the most effective method of concrete compressive strength testing on site. Pdf estimation of concrete strength combining rebound. Briefly, the probe test is performed by firing a 3. Upon completion of the short course training, attendees may test for one of. Windsor probe the windsor hp probe system rapidly and accurately determines the compressive strength of concrete in place by driving a probe into the concrete with a known amount of force. Windsor probe test results were combined to determine the compressive strength of. Rebound hammer test schmidts hammer a non destructive test on concrete surface hardness test duration. Windsor hp probe astm c803 for inplace testing of normal and highperformance concrete. For penetration resistance test applied to highstrength concrete an alternative firing apparatus to the standard apparatus, windsor probe test system, is used. Used to evaluate the compressive strength of inplace concrete.
Windsor probe non destructive testing concrete forney lp. May 27, 2018 this video animation, animated video explains the concept of penetration tests on concrete nondestructive testing methods ndt. Standard measuring gauge non destructive testing systems 3727 north kedzie avenue, email. This video animation, animated video explains the concept of penetration tests on concrete nondestructive testing methods ndt. Windsor probe for grout correlation structural engineering. Guidebook on nondestructive testing of concrete structures. The windsor hp probe system the windsor hp probe system. Sampling of concrete cores and testing its strength is described.
The windsor probe system determines the compressive strength of inplace concrete. Three individual tests can be automatically averaged and displayed on the lcd. Nondestructive evaluation methods for quality acceptance. Onsite evaluation of concrete strength is a main challenge in the condition assessment of existing infrastructure, or the quality control of new construction. Penetration test windsor probe test nondestructive test of concrete duration. Laboratories performing acceptance tests should conform to the requirements of astm c 1077. This test is covered in american society for testing and materials astm. Windsor probe for grout correlation dmoler geotechnical op 27 mar 06 12. Penetration resistance an overview sciencedirect topics. Windsor probe system nondestructive concrete testing.
Penetration tests on concrete windsor probe system. Penetration resistance test on hardened concrete purpose. Windsor probe in use we know that receiving ce certification for the windsor probe test system has brought the time proven test method into the new millenium, says michael hoag president of james instruments inc. Thewindsor hpprobesystem features andbenefits new electronic measuring system enhances accuracy and efficiency. However, both those methods are obviously destructive, can be expensive and. The exposed probe length is recorded and is related to the compressive strength of concrete.
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