1 / 29

QUALITY CONTROL OF CONSTRUCTION MATERIALS (Concrete)

QUALITY CONTROL OF CONSTRUCTION MATERIALS (Concrete). by. K. RAMESH. Research Officer, Engineering Materials Laboratory, A.P. Engineering Research Laboratories, Himayatsagar, HYDERABAD-500030. Tests on cement concrete (Strength Tests). Compressive strength Flexure strength

yank
Download Presentation

QUALITY CONTROL OF CONSTRUCTION MATERIALS (Concrete)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. QUALITY CONTROL OF CONSTRUCTION MATERIALS (Concrete) by K. RAMESH Research Officer, Engineering Materials Laboratory, A.P. Engineering Research Laboratories, Himayatsagar, HYDERABAD-500030.

  2. Tests on cement concrete(Strength Tests) • Compressive strength • Flexure strength • Modulus of elasticity

  3. Compressive strength • Size of the cube = 15 Cm. • No. cubes = 3 • No. of layers in a cube = 3

  4. Name of the Test: Compressive Strength of Cement Concrete. • [ IS : 516 - 1959, IS:1199 - 1959] • Weight of Cement concrete = 60 Kg for 6 No.s of 15 Cm cubes. • Mix proportion by weight = • Water Cement ratio = • Weight of Coarse aggregate in Kg = • Weight of Fine aggregate in Kg = • Weight of Cement in Kg = • Weight of Water in Kg = • Slump in mm = • Type of slump = True/Shear/Collapse • Unit weight: • Volume of cylinder in l (V) = • Empty weight of cylinder in Kg (A) = • Weight of cylinder + Compacted concrete in Kg (B) = • B - A • Unit weight in Kg/m3 = ----------- x 1000 = • V • =

  5. Compressive strength: • Cross sectional area of the 15 Cm cube (A) = 225 Cm2 • Observations: (Note: For each age of testing minimum 3 cubes shall be tested.)

  6. Flexure strength • Size of the specimens = 15 x 15 x 70 for MSA ≤ 40mm = 10 x 10 x 50 for MSA ≤ 20mm

  7. Modulus of elasticity • Size of the specimen = 15 Cm dia. & 30 Cm. height

  8. Tests on cement concrete(Workability & Other Tests) • Slump • Compaction factor • Vee-bee • Analysis of freshly mixed concrete • Density • Yield • Air content • Cement content of hardened concrete • Drying shrinkage • Moisture movement

  9. Workability • Workability is defined as that property of freshly mixed concrete or mortar which determines the ease & homogenity with which it can be mixed, placed, compacted and finished.

  10. Workability tests • Slump test • Compaction factor test • Vee-bee test • Flow test

  11. Slump test • Slump test indicates the behaviour of compacted concrete cone under the action of gravitational force

  12. Compaction factor test • Compaction factor test indicates the behaviour of fresh concrete cone under the action of external force

  13. Vee-bee test • Vee-bee test indicates the behaviour of fresh concrete cone under vibration.

  14. Suggested ranges of workability as per IS:456-2000

  15. Flow test

  16. THE END

More Related