Concrete Air Test Procedure

An air content test is required for checking air entrained concrete.

Concrete air test procedure.

This test method cannot be used for testing lightweight concrete because the aggregate in lightweight is too porous. By then the truck was empty and the crew had completed the work. See astm c173 air content by volumetric method. This is a test required to pass the american c.

The slump plate should be clean firm level and non absorbent. It covers the reasons you are performing this test the equipment needed and the procedure of astm c231. The method of testing is given in bs en 12350 7 which replaces bs 1881. Method a outlines the principle of the test.

Stand firmly on the footpieces and fill 1 3 the volume of the cone with the sample. The pressure procedure of this test method gives substantially the same air contents as the other two test methods for concretes made with dense aggregates. Compact the concrete by rodding 25 times. Two types of air.

3 2 this test method and test method c138 c138m and c173 c173m provide pressure gravimetric and volumetric procedures respectively for determining the air content of freshly mixed concrete. When the field test results arrived soon after concrete placement on a recent project we were told the mix had low air content. Dampen with water and place on the slump plate. The owner wanted us to remove and replace the concrete.

It has quizzes and two practice tests to prepare you for the test. Pkf construction on turnpike i 95 concrete technician. Overview of astm c231 standard test method for air content of freshly mixed concrete by the pressure method. The measurement of air content in fresh concrete of normal density is typically performed using the pressure method another useful test is astm c 173 however the pressure method is frequently preferred because it is relatively fast.

This method of testing can be used on any type of concrete lightweight regular weight or heavy weight. Collect a sample of concrete to perform the slum test. It s good for sieve aggregate. Air entrained concrete is typically specified in areas of the country where frost related damage can occur.

Astm c173 concrete air meter test volumetric method. A sample of concrete is placed in the cylinder of an air meter in three layers each being fully compacted by hand or by vibration. Go to the online aci course. Entrapped naturally occurring in the mix entrained intentionally added to the mix.