UNIVERSITY OF PERPETUAL HELP SYSTEM LAGUNA COLLEGE OF ENGINEERING, ARCHITECTURE AND AVIATION STANDARD TEST METHOD FOR TEMPERATURE OF FRESHLY MIXED HYDRAULIC CEMENT CONCRETE ASTM C1064 LABORATORY REPORT NO. 5 MENDOZA, TRISHA NICOLE B. DATE PREPARED: 04-13-23 E2X DATE SUBMITTED: 04-14-23 ENGR. SHIEMKA P. JUSON, CE, RMP INSTRUCTOR Objective: To determine the temperature of freshly mixed hydraulic cement concrete Apparatus and Materials: Thermometer Setup of Apparatus Procedure: 1. Position the thermometer such that it is submerged into the concrete by a minimum of three inches. Ensure also that the thermometer is surrounded by at least three inches of concrete at all sides. Close up the void left by the placement of the thermometer by gently pressing the concrete around the thermometer at the surface of the concrete to prevent ambient air temperature from affecting the reading. 2. Leave the thermometer on the concrete for at least 2 minutes but not more than 5 minutes. Do not remove the thermometer when reading the temperature. 3. Record the temperatures you have observed for 3 trials. Results and Discussion: A3 B3 C3 Initial Temperature 0°C 0°C 0°C Final Temperature 17°C 19°C 31°C Conclusion I have learned a lot and had many new experiences as a result of conducting the experiment of creating real concrete and curing it. Our group was able to create cylinder concretes in accordance with ASTM C31, which establishes uniform guidelines for producing, curing, preserving, and transporting concrete test specimens under field conditions Then, to create concrete molds, we mixed ingredients in a 1:2:4 ratio, using 1 part cement, 2 parts sand or fine aggregates, and 4 parts gravels or coarse aggregates. After constructing it, we attempted to reach the three concrete molds' respective temperatures of 17°C, 19°C, and 31°C after allowing them to rest for five (5) minutes. We then began to wait for the concrete cylinders to harden before beginning the process of curing it by soaking them in a bucket of water. This is done to ensure that we can keep the concrete at a suitable temperature and moisture level for a long enough period of time to allow for hydration to provide the necessary concrete qualities. Only when concrete is adequately cured will its full strength and durability potential manifest. Recommendation It is crucial to follow established standards such as ASTM or ACI when making and curing concrete test specimens in the field. These standards provide guidelines for the correct procedures and ensure that results are accurate and reliable. Use proper equipment: Using proper equipment such as a concrete mixer, molds, and curing boxes is essential for ensuring the quality of the test specimens. The equipment should be regularly maintained and calibrated to ensure accurate results. Proper mixing and casting: The mixing and casting of the concrete should be done carefully and consistently to ensure uniformity of the test specimens. The molds should be filled in layers and vibrated to remove any air pockets. The curing conditions for the test specimens should be carefully controlled to ensure that the specimens achieve the required strength. The curing conditions should follow established standards and ensure that the specimens are not exposed to conditions that could affect their strength and durability. Proper handling and testing: The test specimens should be handled carefully during transportation and testing. The testing should be done using calibrated equipment and following established procedures to ensure accurate results. By following these recommendations, the quality of the concrete used in construction projects can be assessed accurately, ensuring that the structures built are safe and durable.