Unit Weight Of Concrete Test Procedure

Yield is defined as the volume of concrete produced from a mixture of known quantities of the component materials.

Unit weight of concrete test procedure.

This test method covers determination of the density of freshly mixed concrete and gives formulas for calculating the unit weight yield or relative yield cement content and air content of the concrete. In this video you ll see the procedures for unit weight yie. Method of making and curing concrete test specimens in the field fop for aashto t 23. B when there is a question of calibration.

Calibration of concrete test equipment. Astm c138 standard test method density unit weight. The density unit weight of concrete is measured using a type b pressure meter see photo to verify agreement with the approved project mix design. Subtract the empty container weight from the full container weight 2 1 weight of concrete 3 divide the weight of concrete by the known volume 3 4 density or fresh unit weight there are a few unique procedures listed in the astm c138 to remember.

Aci concrete field testing technician level 1. Warning fresh hydraulic cementitious mixtures are caustic and may cause chemical burns. Scope this procedure covers the method for making initially curing and transporting concrete test specimens in the field in accordance with aashto t 23 17. This video assists those trying to achieve certification as a concrete field testing technician.

The information obtained through this test can also be used to determine yield and relative yield which helps you verify that you are getting the volume of concrete you ordered and paid for. A every 12 months or. Quality control of lightweight concrete to get good normal weight concrete an engineer writes a good specification and sees that concrete quality is assured by proper control procedures at the job. This guide will show you how to do the astm c138 procedure to calculate the unit weight of a sample of concrete as well as other important parameters such as yield gravimetric air content and theoretical density for the whole batch.

With lightweight concrete the engineer specifies a c330 aggregate and the 28 day strength and air dry weight necessary to meet design requirements. Calibrationsa 1 2.