2023年9月12日 · This guide explains how to test the air content of concrete with a type B pressure meter. It is a supplemental ASTM reading, plus a study tool for the ACI exam.

The SAM uses an extended test procedure to determine air content and characterize the size and distribution of air bubbles in the concrete mix. The SAM and test method are important steps forward to increase freeze/thaw durability prediction in exposed concrete.

2023年10月8日 · A guide to testing the air content of concrete with a roller meter. Covers reasons to perform the test, equipment needed, and ASTM C173 procedure. Intended as a supplement to reading the ASTM and as a study tool for the ACI exam.

Fresh concrete test data such as slump and air content can help indicate possible causes and guide the troubleshooting investigation. Was excess water added? Was the air content too high or too low? Need your concrete tested? Find concrete contractors near me.

2024年6月13日 · Follow a step-by-step guide to perform an accurate concrete air test. Understand volumetric & gravimetric methods for testing air content in concrete mixes. Identify factors that affect results & troubleshoot common issues. Use essential accessories & equipment for testing. Maintain/calibrate your meter regularly.

2010年12月31日 · This test method covers the determination of the air content of freshly mixed concrete. The test determines the air content of freshly mixed concrete exclusive of any air that may exist inside voids within aggregate particles.

This video shows you how to do the fresh concrete air test prodecure by pressure method. You'll learn about entrained air and how to use the air meter.

The ASTM test method for pressure air measurement specifies two meters to measure the air content. Type A meter helps in the direct measurement of the change in volume in the concrete. This is carried out by means of a column of water over the known volume of concrete.

Since the percentage of air specified is critical to how the mix performs, accurate tests for concrete air content are essential. Fortunately, they are easy to achieve. The standard test methods ASTM C231 and AASHTO T 152 explain how to test concrete in pressure-type concrete air meters, and describes concrete air meter calibration in detail.

2024年8月7日 · There are three main methods to test the air content in fresh concrete: the pressure method, the volumetric method, and the gravimetric method.