Concrete is a heterogeneous composite construction product obtained by mixing and hardening components such as cement, aggregates and water. The performance of concrete depends on the quality of the components, their proportions, their location and the contact conditions. Cement plays an important role in binding the ingredients together and creating concrete that is hard, strong and cohesive with age. There are several types of cement, in which Portland cement is commonly used in general civil construction . Portland cement is manufactured from the same rocks, ores, and minerals that make up concrete aggregates. Furthermore, no Portland cement component is sufficiently consistent from one cement maker to the next. Therefore, testing concrete is the current practice that includes other mineral admixtures such as fly ash, silica fume, etc. in a rather complex mixture. It is difficult to determine the percentage of cement in hardened concrete due to the lack of a perfect procedure for determining the proportions of concrete. In addition, the use of organic admixtures in concrete as admixtures in concrete has made it more difficult to determine the actual proportions of materials in the concrete in the solid state after bridge construction/collapse. However, the difference in composition (element) between cement and aggregate is one of the correct choices for determining cement in hardened concrete. As a result, chemical examination of hardened concrete can reveal a plethora of information regarding the mix's composition and potential degradation reasons. Documentation on the chemical analysis of hardened concrete is rarely available. California Test 403 is a chemical analytical procedure commonly used to determine the proportions of components in concrete. The ASTM approach involves chemically detecting the amount of dissolved silica and calcium oxide in a sample and then indirectly computing the percentage of cement by assuming or establishing from the original cement's analysis. The initial amounts of silica and calcium oxide in cement were determined. This approach produces reliable findings, especially if initial cement and aggregate samples are available, but it is time intensive and cannot be used on concrete with aggregates that develop considerable amounts of silica and calcium oxide under test circumstances. Hime briefly described several chemical analytical procedures commonly used to evaluate the cement content in hardened concrete . Basically, all chemical analysis procedures are based on the chemical composition of cement. The calcium oxide content, the soluble silica content, the sulfate content, and the chloride content are the less enumerable determinations of cement content. Covault and Poovey employed neutron activation studies to determine cement content. By adding the radioactivity and determining the cement content from the cement content VB count rate curve, the volume of cement in a radioactive concrete trial was determined. This technique, however, necessitates the use of costly irradiation and counting equipment. Furthermore, it cannot be used with calcium-containing aggregates. Iddings and his colleagues studied the feasibility of several analysts for enabling nuclear techniques, stable tracer analysis, measurement of natural radioactivity, and copper dilution. taste in the determination of cement in concrete. Neutron activation analysis was shown to be quick once again, albeit it was impeded by inaccuracies caused by variables typical in concrete structures. It also necessitates an expensive installation. Other techniques are either uneconomical or only practical under ideal conditions. It should also be mentioned that when employing radioisotopes, personnel safety must be assured against any radiation dangers . The analysis will incur an additional cost as a result of this requirement. Kossivas devised a method for calculating the cement content of a concrete sample using its sulphate concentration. This method necessitates the knowledge of the cement's sulphate content as well as the fact that all sulphates are obtained from the cement. The usage of aggregates containing excessive levels of sulphates can lead to serious problems. In addition, the overall characterization of the aggregates in terms of their suitability for use in final construction was determined by petrographic analysis as well as by X-ray diffraction (XRD) . The petrographic analysis confirms the composition of the original aggregate which helps to fill in the gaps to infer the test results. Therefore, petrographic analysis can still be one of the useful methods for the assessment and characterization of concrete. In this study, an attempt was made to find out how much cement is in hardened concrete samples of known proportions, in order to compare the results and find the accuracy. The XRD technique is a flexible, non-destructive method for revealing detailed information on the chemical composition and crystal structure of natural and artificial materials. The chemical test procedure suggested in this article is a simplified version of the California 03 test. Here, the procedure was developed as a result of various practical problems raised during the process. tested according to California 03 test. Concrete with iron content exceeding traceable limits can be easily analyzed with this simplified procedure.