Basic civil engineering Part 19

Question-1: What is the FM(Fineness Modulus)?
Answer: FM( Fineness Modulus is an empirical figure obtained by summing up the cumulative percentage of materials retained on each of the sieve excluding 0.075 mm sieve and dividing the sum by 100.

Question-2: What is the FM value for Sand and Stone?
Answer: For sand the FM value varies from 2.5-4.0 and for stone FM value varies between 6.5-8.0.

Question-3: What is LAA?
Answer: LAA means Los Angeles Abrasion Test which represents the strength of stone to withstand with the abrasion that occurs during the life cycle of the stone.

Question-4: If the W/C cement ration is less what will be the strength of concrete?
Answer: If W/C ratio decreases concrete strength will rise up.

Question-5: What is Compaction?
Answer: Compaction is a process by which the volume of the soil decreases by using any mechanical devices and by pulling out the available air in the soil.

Question-6: What is Consolidation?
Answer : Consolidation is a natural process by which the soil volume reduces and it becomes in compacted form by pulling out the water and decreasing the pore spaces between the particles    

Question-7: Say name of the compaction test methods?
Answer : 1. Standard Proctor Test
2. Modified Proctor Test

Question-8: How can you measure workability of the concrete on field?
Answer: Workability can be measured by slump test.

Question 9: What is the normal slump value for concrete?
Answer: Normally slump vale varies between 50 mm-100 mm for normal concrete.

Question 10: What is the dimensions of Slump Mold?

Answer: Height=12 inch, Top width=4 inch and bottom width= 8 inch