KEREN BANGET NIH !!!!! TUTORIAL PEMBUATAN BETON , PROGRAM STUDI TENIK SIPIL UNIVERSITAS KADIRI 😊🤩

Summary

This tutorial demonstrates the process of concrete production, focusing on aggregate testing, mix design, and concrete preparation, as part of the Civil Engineering program at the University of Kadiri. It covers various methods for testing the quality of coarse and fine aggregates, detailed mix design calculations based on SNI standards, and practical steps for mixing and testing concrete. The tutorial also includes workability and compressive strength tests, ensuring concrete meets required standards for construction. The thorough explanation is designed to help students and professionals understand concrete production from start to finish.

Takeaways

• 😀 Coarse aggregate testing is essential for ensuring the quality and mechanical strength of the aggregates used in concrete.
• 😀 The abrasion test helps assess the durability of coarse aggregates by simulating wear and tear.
• 😀 Fine aggregate testing ensures quality control and influences the water-to-cement ratio in the concrete mix.
• 😀 A comprehensive mix design involves determining target compressive strength, water-cement ratio, and aggregate percentages.
• 😀 The water-to-cement ratio is calculated based on the target strength, using charts to guide the process.
• 😀 Cement quantity and water requirements are calculated based on the type of environment and exposure conditions.
• 😀 Concrete mix design includes the proper selection of sand, gravel, and cement quantities based on aggregate properties.
• 😀 The aggregate's water content, specifically for fine aggregates, is calculated to ensure the desired concrete consistency.
• 😀 A series of tests (e.g., Abrams cone, flow test) measures the workability and consistency of the fresh concrete.
• 😀 Specimens are created from the fresh concrete to test its compressive strength after curing for 28 days.
• 😀 The final compressive strength of the concrete is tested and recorded using a hydraulic press, ensuring it meets the required standards.

Q & A

What is the purpose of the coarse aggregate testing in the concrete production tutorial?

The coarse aggregate testing ensures the quality of the coarse aggregates, measures their mechanical strength, and adjusts the concrete mixture accordingly.

What is the first step in preparing the coarse aggregate for testing?

The first step is to prepare the materials by using 1 kg of coarse aggregate that passes through a number 3/4 sieve, ensuring it is in a dry condition.

How is the abrasion of the coarse aggregate tested?

The abrasion of the coarse aggregate is tested by placing the aggregate into a Los Angeles machine with 11 steel balls, rotating the machine for 500 revolutions, and then separating and weighing the aggregate to observe any loss.

Why is the fine aggregate testing important in concrete production?

The fine aggregate testing ensures the quality of the fine aggregates, controls the water demand, and helps in adjusting the mixture based on the results of various tests like silt content and gradation.

What is the procedure for testing the silt content in fine aggregates?

The procedure involves placing 0.5 kg of sand in a glass, adding water and vinegar, and then observing the sedimentation of silt after 24 hours.

What is the significance of the mix design process in concrete production?

The mix design process determines the appropriate proportions of materials such as cement, water, and aggregates based on the required concrete strength, workability, and durability, ensuring the concrete meets the specified performance standards.

How is the water-cement ratio determined in the mix design?

The water-cement ratio is determined using a graph that correlates the desired compressive strength to the water-cement ratio, yielding a value of 0.44 for this particular mix design.

What factors are considered when determining the amount of cement needed in the mix design?

The amount of cement is calculated based on factors like the desired strength, water-cement ratio, and the conditions in which the concrete will be used, such as exposure to weather and humidity.

How is the percentage of fine and coarse aggregates calculated in the mix design?

The percentage of fine and coarse aggregates is determined by the gradation of the aggregates and their corresponding proportions from the mix design graph, with the fine aggregates making up 40.5% and the coarse aggregates 59.5%.

What tests are used to assess the workability of fresh concrete?

Workability is assessed using tests like the Abrams cone for flow and the V-funnel test to measure the ease with which the concrete flows through obstacles during the casting process.