衰退测试, 混凝土

衰退测试

The concrete slump test is a very simple procedure to measure the workability of fresh concrete. Because it involves low-cost tools and can be quickly done in situ, it is used extensively on most construction sites. By measuring the consistency of fresh concrete before it sets, this test can indicate improperly mixed material.

The concrete slump value determined in this test is used to find the water-cement ratio in mixes. By measuring the difference between the mold height and the height of the specimen, researchers are able to evaluate the concrete consistency. The test is carried out from batch to batch to ensure uniformity of different loads. For more information on concrete slump testing, please read our 混凝土坍落度试验 blog.

In most cases, the test is conducted according to the ASTM C143 规范. The slump test equipment required includes:

标准坍落度锥 – Cone shaped mold that can be made of 钢 or 塑料 and should measure 8" (203mm) dia. at base, 4" (102mm) dia. at top and 12" (305mm) high.

坍落度底板 – The slump cone will sit on the base during the test and it should include bolt-on clamps to hold the cone steady during testing. A base plate with a handle will make it easier to remove and can also be used as a guide to measure the slump.

刻度夯实杆 – 使用d to both tamp the concrete mixture and measure the amount of slump.

Additional accessories that are not required, but can increase efficiency are:

独家新闻 – A round nose scoop with bowl dimensions 8.25“(210毫米)长度x 5.25" (133mm) width x 3" (76mm) depth.

漏斗 – An aluminum funnel will assist in filling.

刷 – 使用d to clean the concrete off of testing equipment after the test is complete.

泥刀 – A forged 钢 trowel will assist in filling.

洪堡的 混凝土坍落度图 provides a range of slump values and their applications. For instructional information, please read our blog on 混凝土坍落度试验.

If you have questions or need help selecting equipment, please call us at 1.800.544.7220或使用我们的 问洪堡 form.