Concrete Air Test Procedure

It s good for sieve aggregate.

Concrete air test procedure. It covers the reasons you are performing this test the equipment needed and the procedure of astm c231. When the field test results arrived soon after concrete placement on a recent project we were told the mix had low air content. An air content test is required for checking air entrained concrete. This test method cannot be used for testing lightweight concrete because the aggregate in lightweight is too porous.

This guide will teach you how to test air content of concrete with a type b pressure meter. Go to the online aci course. 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. The method of testing is given in bs en 12350 7 which replaces bs 1881.

Compact the concrete by rodding 25 times. The slump plate should be clean firm level and non absorbent. Overview of astm c231 standard test method for air content of freshly mixed concrete by the pressure method. Collect a sample of concrete to perform the slum test.

Astm c173 concrete air meter test volumetric method. By then the truck was empty and the crew had completed the work. Dampen with water and place on the slump plate. Air entrained concrete is typically specified in areas of the country where frost related damage can occur.

Two types of air. This method of testing can be used on any type of concrete lightweight regular weight or heavy weight. Pkf construction on turnpike i 95 concrete technician. Stand firmly on the footpieces and fill 1 3 the volume of the cone with the sample.

It has quizzes and two practice tests to prepare you for the test. 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. It is intended to be a supplement to reading the astm as well as a study tool for the aci exam. 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.

Procedure of slump test for concrete. Method a outlines the principle of the test. This is a test required to pass the american c. 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.