Accurate matching and efficient splitting experimental device for early strength of activated fly ash-doped cement test piece

Abstract

The invention discloses an accurate matching and efficient splitting experimental device for early strength of an activated fly ash-doped cement test piece. The matching precision of the fly ash and the micro-nano material is an important factor influencing the early strength of a micro-nano material activated fly ash-doped cement test piece, and weighing for manufacturing a standard test piece is carried out manually and gradually; due to multiple sensitive factors of the early strength, the standard test piece is mostly taken out from a matching cylindrical pipe and is disassembled from the bottom or the top end by means of external force, and the test result is influenced, so that the accurate matching and efficient splitting experimental device for early strength of the test piece is needed. Different components such as micro-nano materials, coal ash and water are distributed to the middle-layer vibration platform through 4-6 sets of precise metering filling pipes arranged on the upper-layer platform, are uniformly stirred through a stirring system and then are lowered to the lower-layer early strength matching cylindrical pipe on the basis of full vibration of the vibration platform; by means of layered stirring and compaction of an intelligent stirring system and full vibration of a lower-layer vibration platform, after 6-8 hours, the early strength matching cylindrical pipe is placed in a strength testing device to be laterally split, and then accurate early strength matching and efficient splitting can be completed.

Description

technical field [0001] The invention relates to a tool for early strength matching and splitting of a standard test piece [0002] technical background [0003] At present, cement sealing materials are widely used in downhole drilling and drainage, but cement-based materials have shortcomings such as long setting time, poor early strength, easy segregation, and poor stability, which make it difficult to meet the increasing requirements for downhole construction. By-products and admixtures can improve the performance of cement-based materials. A large number of studies have shown that the addition of fly ash can not only save cement and reduce engineering costs, but also achieve the groutability and durability required for mine goaf grouting projects. Due to its nano-effect, nano-materials are mixed into fly ash cement in a small amount, and the synergistic optimization of the activity effect, filling effect and crystal nucleus effect of nano-materials and fly ash is expected ...

AI Technical Summary

Problems solved by technology

[0007] Compared with the prior art, the beneficial effect of the present invention is that it can effectively solve the inaccuracy of manual measurement results, the damage and error of the test piece during the disassembly process, and the uneven central stress of the test piece due to uneven density when the vibration is mixed. The problem is to realize the precise ratio of the early strength of the activated fly ash mixed with the cement specimen, reduce the error of disassembly from the top and bottom after the specimen is formed, and accurately measure the early strength through the mixing, agitation and vibration of the upper, middle and lower platforms provide a strong guarantee

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