Concrete Air Test Steps

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.

Concrete air test steps. Important steps in the volumetric test. Air entrained concrete is typically specified in areas of the country where frost related damage can occur. It covers the reasons you are performing this test the equipment needed and the procedure of astm c231. It s good for sieve aggregate that would be retained on a 1 1 2 sieve over a 1 sieve.

The sample should be representative of the concrete supplied. It is intended to be a supplement to reading the astm as well as a study tool for the aci exam. Here is the other test that would determine the durability of concrete. This guide will teach you how to test air content of concrete with a type b pressure meter.

See astm c173 air content by volumetric method. The three cube sample shall be taken from the delivered fresh concrete and kept it in the curing tank for 28 days or after 24 hours the concrete sample would be demoulded and it will be sent directly to the approved third party laboratory to ensure its curing. The owner wanted us to remove and replace the concrete. When the field test results arrived soon after concrete placement on a recent project we were told the mix had low air content.

For purposes of accepting or rejecting the load. Sampling after 0 2 m3 of the load has been poured. Kelly maunder of ground engineering conducting a standard concrete air test. This method of testing can be used on any type of concrete lightweight regular weight or heavy weight.

Sampling the first step is to take a test sample from the large batch of concrete. The sample is taken in one of two ways. 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. Entrapped naturally occurring in the mix entrained intentionally added to the mix.

This test method cannot be used for testing lightweight concrete because the aggregate in lightweight is too porous. 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 should be done as soon as discharge of the concrete commences.