Method for testing workability rheological parameter range of concrete

Abstract

The invention discloses a method for testing a workability rheological parameter range of concrete. The method comprises the following steps of: changing the mix proportion design of the concrete to change the yield stress and the viscosity coefficient of the concrete by virtue of a concrete rheometer; testing workability of each concrete sample and performing quantitative analysis on liquidity, water-retaining property and viscosity of each concrete sample; and determining the workability rheological parameter range of the concrete. The method provides a rheological basis for the workability determination and the mix proportion design of the concrete; and moreover, concrete rheological parameters are directly measured in the concrete workability test and are compared with the concrete workability rheological parameter range, so that the good or poor workability can be directly, conveniently, accurately and comprehensively determined.

Description

technical field [0001] The invention relates to a method for testing the flow characteristics of materials, in particular to a method for testing the range of rheological parameters of concrete workability. Background technique [0002] With the rapid development of the production and construction industry, concrete, as an important building material, is widely used in bridges, railways, buildings, roads and other fields. There are various types of fresh concrete, including self-compacting concrete, high-performance concrete, superfluid concrete, etc. The quality of concrete directly affects the construction quality of commercial concrete. At present, the quality requirements for fresh concrete before construction are mainly concentrated in three Three aspects: fluidity, water retention and cohesion, these three aspects are unified into the workability of concrete. [0003] Fresh concrete is a solid-liquid mixed phase, and it is generally considered that fresh concrete is a...

AI Technical Summary

Problems solved by technology

These test methods distinguish the workability of concrete by height or flow time. Usually, the same test results can be obtained for several types of concrete with different properties, which shows that these methods are not highly recognizable and cannot accurately determine the workability of concrete.

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