Concrete Air Test Procedure

This guide will teach you how to test air content of concrete with a type b pressure meter.

Concrete air test procedure.

Overview of astm c231 standard test method for air content of freshly mixed concrete by the pressure method. This test method cannot be used for testing lightweight concrete because the aggregate in lightweight is too porous. Collect a sample of concrete to perform the slum test. The slump plate should be clean firm level and non absorbent.

Method a outlines the principle of the test. The owner wanted us to remove and replace the concrete. Entrapped naturally occurring in the mix entrained intentionally added to the mix. See astm c173 air content by volumetric method.

It s good for sieve aggregate. This is a test required to pass the american c. The method of testing is given in bs en 12350 7 which replaces bs 1881. 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.

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. It is intended to be a supplement to reading the astm as well as a study tool for the aci exam. Stand firmly on the footpieces and fill 1 3 the volume of the cone with the sample. Air entrained concrete is typically specified in areas of the country where frost related damage can occur.

It has quizzes and two practice tests to prepare you for the test. By then the truck was empty and the crew had completed the work. It covers the reasons you are performing this test the equipment needed and the procedure of astm c231. Procedure of slump test for concrete.

Two types of air. Go to the online aci course. This method of testing can be used on any type of concrete lightweight regular weight or heavy weight. 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. Dampen with water and place on the slump plate. 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.