The mold for the test is in the form of the frustum of a cone having height 30 cm, bottom diameter 20 cm and top diameter 10 cm. References 1 alexander mg, ballim y, mackechnie jm, concrete durability index testing manual research monograph no. One of the major problems that you had faced in your field work is concrete compaction during mixing. This paper presents the results of compressive tests and finite element analysis of foamed concrete cubes. More specifically, it measures concrete consistency between batches. Partial destructive test by drilling cores and testing them in compression. Acceptance testing and criteria for ready mixed concrete in. May 18, 2018 procedure for compressive strength of concrete or cube test. How to do concrete cube test at construction site youtube. Concrete cube testing to determine the strength of concrete can be done in both destructive and nondestructive methods of testing. After mix design, you may have doubt, is this design will be ok. Making, curing and testing cubes should be carried out in the correct manner. Sep 02, 2017 a concrete cube is a sample cube having each dimension of 150 mm.
If the largest nominal size of the aggregate does not exceed 2 cm, 10 cm cubes may be used as an alternative. A set of 3 cubes specimen average strength will be a sample. Jan 07, 2012 cube tests are considered as one of the prime and basic gauge to measure the strength of concrete after the pour. The average of any 6 successive test results for the same class of concrete is not less than 90% of the final trial mix strength for that class. Slump test of concretecone test procedure workability of.
The final test include the load testing on structure. Finally, the influence of cube size on the compressive strength of concrete was determined. Keep the test specimens submerged underwater for stipulated time. Procedure for compressive strength of concrete or cube test. Test procedure for uniformity of concrete txdot designation. Chapter 4 concrete tex424a, obtaining and testing drilled cores of concrete manual of testing procedures 5 0899 0500 test specimens continued moisture conditioning submerge the test specimens in lime saturated water at 23. Site testing slump test always do your slump test before making your cubes to ensure the concrete is usable. The test results show that the compressive strengths of 100 mm cube samples was higher than that of 150mm cube samples. Report on compressive strength of concrete cubes customer contractor consultant froject name location.
The cube test controller enables the fully automatic control of a hydraulic press for the testing of concrete cubes. Nov 06, 2016 concrete cube testing to determine the strength of concrete. For uniform and comparable results, follow a standard and consistent procedure in making all of the test specimens whether they are used either for standard or for control tests. Load at the failure divided by area of specimen gives the compressive strength of concrete. The procedure for compressive strength test of concrete cubes.
In the case of concrete containing aggregate of maximum size more than 38 mm, the concrete shall be wetsieved through one and half inch screen to exclude aggregate particles bigger than 38 mm. No single cube result is less than 75% of the final trial mix strength for that class of concrete. Measurement the hydraulic pressure in the test piston is proportional to the force exerted by the piston on the test sample. Quality control of construction testing of concrete cubes. Following are the procedure for compressive strength test of concrete cubes. Development of test methods 21 surface absorption test 21. If the slump test fails to meet the range limit as dictated by the british standard shown in the table below then the load should be rejected. Though there are several methods and tests to ensure that the mix poured meets all required parameters, the strength of the concrete is judged primarily by cube test only. The compression test measures concrete strength in the hardened state. Failure to do this can result in the need to spend even more money.
The concrete slump test is used for the measurement of a property of fresh concrete. Specimen preparation and comparison tests preparation of test specimens selection and application of penetrating sealers 15 comparison testing 16 nchrp 244 series ii testing 16 aashto t259 testing 17 4. The tamping rod is of steel 16 mm diameter and 60cm long and rounded at one end. The compression test shows the best possible strength concrete can achieve in perfect conditions.
Place the prepared concrete mix in the steel cube mould for casting. Compressive strength of concrete is an important element in designing r. Compressive strength of concrete cube test, procedure, results. In civil engineering jobs, civil engineering construction practice cube test is one of the vital test which is performed to determine the strength of concrete which has been already used in the construction. Acceptance testing and criteria are give in section 8. For most of the works cubical moulds of size 15cm x 15cm x 15cm are commonly used. It should be filled in 50 mm layers and compacted, with a steel tamping bar, with a minimum of 25 or 35 tamps per layer for a 100 or 150 mm mould respectively. It can be used for all types and sizes of projects but should be supplemented with additional inspection requirements when the complexity of the project. Field concrete samples are prepared, cured and tested according to astm standard procedures. Cube testing is a destructive testing method of concrete testing, as the cubes are crushed in compression testing machine.
The standard rebound hammer provides a simple, easy and inexpensive method to estimate concrete strength properties. Any one test result is not less than 85% of the final trial mix strength for that class of concrete. Durability index testing procedure manual january 2007 rev. Twentyfour hours after casting, place the cylinders in water at a temperature of 15 to 25 c 60 to 80f for a period of 12 to 14 days. View test prep cube test report 1 from civil 20402 at tun hussein onn university of malaysia. According to wikipedia, compressive strength of concrete is defined as the characteristic strength of 150mm size concrete cubes tested at 28 days. The 6 cube moulds are filled with concrete used in works. Once it sets, after 24 hours remove the concrete cube from the mould. Method statement for concrete sampling and testing method. A pressure transducer is connected to the pressure line, and provides an. The test is an empirical test that measures the workability of fresh concrete. Structures compressive strength of concrete consequently quality of concrete manufactured is often measured by.
Request for compression test on concrete cube form nocows041issue 2 rev. Compressive strength of concrete cube test, procedure. The test is popular due to the simplicity of apparatus used and simple procedure. Effect of cube size on the compressive strength of concrete. Cylindrical test specimens shall have a length equal to twice the diameter. Six concrete properties are determined from each of two samples, compared to each other, and the property differences are determined. Compressive strength test of concrete cubes for cube test two types of specimens either cubes of 15cm x 15cm x 15cm or 10cm x 10cm x 10cm depending upon the size of aggregate are used. Hi as per is 456 code, freqvency of sampling minimum samples of cube per m3 concrete quantity for 15 m3 concrete 1sample 3cubes for 615 m3 concrete. It does not measure or predict in any unique way the strength of the concrete in the structure. Also is it is usually a minimum requirement from the client to provide evidence of cube test results to ensure. Concrete cubes are made on site to check that the strength of the concrete is above the minimum strength which has been specified. The concrete cube test determines the compressive strength of a concrete cube made from fresh concrete in a mold.
This test measures the uniaxial compressive strength of concrete cubes which are made, cured and tested to very specific requirements. Slump test procedure is to determine the workability of concrete. Compression test of concrete cube laboratory work 2 author name class. Procedure for concrete compression test concrete sample. Tex424a, obtaining and testing drilled cores of concrete. However, the results of the test on concrete are affected by various factors such as smoothness of the surface, geometric properties. Cube test report 1 compression test of concrete cube. Aug 06, 2014 cube test is conducted for determining the ultimate compressive strength of concrete cube strength. Quality control testing is done by the producer to assure that the material meets certain standards, whereas the owner does acceptance or verification testing. After tamping each layer, the mould should be lifted slightly and dropped or the sides tapped, to close the top surface of each layer.