Centrifugal concrete slump testing method

Abstract

The invention discloses a centrifugal concrete slump testing method which comprises the following steps: adding a concrete sample to be tested into a concrete slump inner cylinder of a centrifugal suspended slump cylinder, and recording the height h1 of the concrete sample; a to-be-tested concrete sample in the concrete slump inner cylinder begins to slump under the action of centrifugal force, and the height h2 of the concrete sample is recorded; when the centrifugal force exceeds the snap spring pre-tightening force of a spring bayonet lock for locking the connecting rod mechanism, the connecting rod mechanism is loosened and drives a sliding rail connected with the periphery of the concrete slump inner cylinder to be separated from the concrete slump outer cylinder, the concrete sample is thrown into the concrete slump bottom cylinder and the concrete slump outer cylinder from the concrete slump inner cylinder, and the height h3 of the concrete sample is recorded; and synchronously comparing h1, h2 and h3 of each group of concrete samples so as to realize qualitative slump analysis of different concrete samples. Metering and comparing the slump heights of different concrete slump stages; therefore, qualitative slump analysis of different concrete samples is realized.

Description

technical field [0001] The invention relates to a concrete slump test method, belonging to the technical field of concrete test test, in particular to a centrifugal concrete slump test method. Background technique [0002] Concrete slump mainly refers to the plasticizing performance and pumpability of concrete. The factors affecting concrete slump mainly include gradation changes, water content, weighing deviation of weighing instruments, and the amount of admixtures, which are easily overlooked. temperature of cement, etc. Slump refers to the workability of concrete, specifically to ensure the normal progress of construction, including the water retention, fluidity and cohesion of concrete. [0003] With the development of new material technology, the application of adding new materials to concrete to obtain the properties of modified concrete is becoming more and more common; Insufficient strength and other problems affect its safety and use function. In practice, adhesi...

AI Technical Summary

Problems solved by technology

The slump test in the concrete modification test is very important to analyze the modification performance of concrete, but for special concrete, such as concrete samples with good bonding performance, general ductility and elastic deformation, the conventional concrete slump test When the test effect is often poor

[0004] Chinese patent 202122203246.7 discloses high flexural strength polymer modified recycled concrete slump test equipment, which mainly improves the prior art when testing the concrete slump, which is usually caused by manual pulling up of the slump cylinder. The situation that the direction is inclined and scratches the concrete pile, thereby aggravating the collapse of the concrete pile and affecting the measurement results, including the equipment shell and the movable door installed on the side of the equipment shell, the interior of the equipment shell is fixed A slump plate is installed, a slump cylinder is arranged above the slump plate, and a lifting mechanism is installed inside the equipment housing

[0006] In summary, it can be clearly seen that there are few technical tests (slump) on cohesive concrete at present, mainly due to the characteristics of cohesive concrete: 1. The traditional slump test cannot be normal due to the cohesive performance characteristics of cohesive concrete 2. The viscous concrete requires additional driving force for effective separation to meet the requirements of the slump test; 3. The bonding relationship between the viscous concrete and the wall also needs to be considered

Images