After the pore water pressure generated by the application of confining pressure is dissipated, the deviator stress. The slump test is carried out on fresh concrete to determine its workability, which is the. In the laboratory, the standard triaxial apparatus can. Need and scope of the experiment iitk indian institute. Tensioncompression testing machines verification and calibration of the forcemeasuring system this paper discusses the effect of calibration uncertainties on test data produced by materials testing machines. Example long laboratory report mechanical properties. How we measure reads a read is counted each time someone views a publication summary such as the title, abstract, and list.
The unconfined test is used for cohesive, saturated soils. The samples were then placed between the compression anvils to commence uniaxial compression testing fig. Actual composite testing is not feasible in developing programs of fibers, because the limited number of sample fibers are produced in laboratories. Sensitivity q u for undisturbed sample q u for remoulded sample general remarks. Undrained triaxial compression tests laboratory experiment. The upper head moveable while the lower head is stationary. The test is conducted on a compressiontesting machine. Clamping simulation clamp testing configuration and forces test sample weight. It has a maximum load of 5 kn and a variable pulling rate. Meeting a 90 minute group exercise to conduct tests note.
Grade of cement average compression strength for a month 1. Crosshead speeds can be changed by changing the speed of the motor fig. Compression test lab report strength of materials youngs. In fact, because the unconfined compression test does not provide confinement for the soil, and because of the effects of sampling disturbance, strengths measured in the unconfined compression test are usually a lower bound of the actual strength. Test matrix of u10mo compression tests showing the strain rate, temperature, and number of samples tested at each condition. Pdf experiment unconfined compression mohammad faizal. Examples of how operators, materials, testing methods, and testing machine limitations, contribute to the. Table 2 shows the matrix used for the 32 tests summarized in this report, which includes testing at 6 temperatures and 3 different strain rates. Strength and testing of materials engr211204 uploaded by. The test may be carried out in the laboratory or at the field. Compression testing is essential, insofar as the compressive strength of an frp may be very different from its tensile strength.
Uniaxial tension and compression testing of materials. Compression device, load and deformation dial gauges, sample trimming equipment, balance, moisture can. By this single test one judge that whether concreting has been done properly or not. For structural applications of materials such as bridges, pressure vessels, ships. Where l and d are the length and diameter of soil specimen, respectively. Appendix a contains a detailed list of all tested samples. Aluminum, steel or composite materials can be used as the specimen material mostly. Materials testing machines investigation of error sources and. This report contains the results of a compression testing lab. For the compression test, two concrete cylinders were placed vertically in the universal loading machine with sulphur caps placed at each end of the cylinder to distribute the load coming from the machine and a compressometer to measure the strain. Compression test lab report free download as word doc. The object of this experiment is to measure the tensile properties of two polymeric materials, steel and aluminum at a constant strain rate on the tension testing machine.
T peshawar the list of experiments can be seen in table of contents under the supervision of sir engr. Nov 18, 2009 a compression test can be performed on utm by keeping the test piece on base block see in fig. It assumes a basic knowledge of soil mechanics for those readers unfamiliar with some terms in this paper, it. To conduct compression test on a specimen using a universal testing machine utm to determine ultimate compressive strength. A deaired, coarse porous disc or stone is placed on the top of the pedestal in the triaxial test apparatus. Compression lab report strength of materials youngs modulus. Compression lab report strength of materials youngs. For the compression test, two concrete cylinders were placed. The data produced in a compression test can be used in many ways including. Specimen is machined in the desired orientation and according to the standarts. This test is inappropriate for dry sand or crumbly clays. This paper provides an introduction to the triaxial test, explaining why the test is performed, the stress state of a tested soil, required test system components, and the general procedure for running a triaxial test. The compressive strength of the concrete cylinder is one of the most common performance measures performed by the engineers in the structural design.
Uniaxial tension and compression testing of materials mit. An example of that machine, shown with a test cylinder in place, is illustrated in figure 3. Testing of wood the goal of this lab is to help provide better understanding of the properties of wood. Dec 19, 2015 whereas for hardened concrete, they are cube compression test and flexibility compression beam test. Cut a soil specimen so that the ratio ld is approximately between 2 and 2. A major difficulty is that the use of flat, straightsided coupons, while convenient from a practical point of view, may require a reduced gage length if buckling is to be avoided in uniaxial compression, depending on the nature of the specimen. The equipment you will use to perform the compression test is a compressiontesting machine, having a capacity of 250,000 pounds. This report summarizes the results of a series of compression tests of u10mo alloy conducted at the pacific northwest national laboratory. Procedure overview this procedure is to be used for determining the compressive strength of concrete cylinders and cores. This is essentially a special case of the triaxial compression test where the minor principal stress is zero.
Compression testing of concrete cylinders a nd cores rev. The setup of the experiment could be changed to accommodate different types of mechanical testing, according to the astm standard e. In this test, the saturated soil specimen is first consolidated by an allaround chamber fluid pressure. Whereas for hardened concrete, they are cube compression test and flexibility compression beam test. Compression testing of composites in itself is not straight forward because of the sample. Astm c14 it is important to grasp the complexity of building.
Once a soil sample is in place, and the test conditions selected, the system will run the entire test from start to finish. Compression testing an overview sciencedirect topics. The objective of this lab is for students to conduct compressive strength testing of masonry. The following tests was performed by the students of civil engineering department u.
The equipment you will use to perform the compression test is a compression testing machine, having a capacity of 250,000 pounds. T111022 bh depth of sample description of sample index properties triaxial compression no m liquid limit % plastic limit %. This test is a destructive method, in which a specimen of a standard shape and dimensions prepared according to astm d 638tandard test method for tensile properties of. The topic of this lab is confined to the tensile property of polymers. The procedures for conducting the compression test are as. The unconfined compression test allows you to quickly measure the compressive strength for cohesive soils and is a core offering for most laboratories.
Mmultistage ffunctional rremoulded lvlaboratory vane test results of triaxial compression tests contract. Compression testing provides data on the integrity and safety of materials, components and products, helping manufacturers ensure that their finished products are fitforpurpose and manufactured to the highest quality. Two measurements of the initial gage dimensions of the specimens were taken and averaged to obtain the dimensions that appear in table 2. The departmentlaboratory is not responsible for the sampling, originality and on site conditions mix proportion, wc ratio, compaction, curing and quality of ingredients. Compression lab report strength and testing of materials studocu. Civ e 353 geotechnical engineering i shear strength of. Minimum three samples should be tested, correlation can be made between unconfined strength and field spt value n. Calculations for the mix design can be seen in appendix a of this report. The consolidated isotropic undrained triaxial test is the most common type of triaxial test. The tensile tester used in this lab is manufactured by shimadzu corporations model ajs j 1. Unconfined compression test purpose, procedure, lab report. Lab manual perform compression test on utm engineering. This report summarizes the results of a series of compression tests of u10mo alloy conducted at the pacific northwest.
It is, therefore, incorrect to assume the grade of cement from the test report or from the average monthly strength or from the grade printed on the cement bag but by using the formula given below. Compressive strength of concrete cube test pdf, procedure, results the compressive strength of the concrete cube test provides an idea about all the characteristics of concrete. We will have a demonstration of steel quenching at the end of this lab reading. It can also be performed on a compression testing machine. The uniaxial monotonic compression test is the first type of test within this program. How we measure reads a read is counted each time someone views a publication summary such as. A compression test can be performed on utm by keeping the testpiece on base block see in fig.
From the test result we get the maximum unconfined compression strength q u is determined, using q u. An axial load is rapidly applied to the specimen to cause failure. Compressive strength of concrete cube test pdf, procedure. Some materials such as the mild steel used in this lab will have a well defined yield point that can be easily identified on the stress strain curve. After preparing the ends, a compressive axial load will be applied to the samples at a continuous rate until failure occurs. The procedures for conducting the compression test are as follows. In general, concrete would have acquired 70 % strength on the 7th day. Materials testing machines investigation of error sources. Technical report pdf available october 20 with 20,565 reads. The test results are recommended to be interpreted in the light of above factors by the engineer. The advantage of doing unconfined compression test is without any calculation the confining pressure. According to wikipedia, compressive strength of concrete is defined as the characteristic strength of 150mm size concrete cubes tested at 28 days. In this experiment we will to discuss the compression test and the materials behavior under constant compression load. Secondly, the tension setup described in this report was developed.
Here, the compressive strength of concrete cylinders is determined by applying continuous load over the cylinder until failure occurs. Nov 22, 2010 compression testing provides data on the integrity and safety of materials, components and products, helping manufacturers ensure that their finished products are fitforpurpose and manufactured to the highest quality. Example long laboratory report mechanical properties of 1018. Read this handout carefully skim astm d2435 on the consolidation test. Experiment 4 testing of materials in tension object. The unconfined compression test is a type of unconsolidated undrained test that is commonly used for clay specimens. Compression test of steel columns mech 237 103 strength. The material was tested at ambient temperature that remained constant. The data used for this lab report was not gathered from the student run experiments, but rather from standardized testing performed by the laboratory professor, to ensure accurate and consistent results. For me lab i, you will usually report your values as mean. Hardened concrete test is usually carried out when concrete is at age 3, 7, 14, 21, and 28. By definition, the compressive strength of a material is that value of uniaxial.