Grout state and strength determining device and use method thereof

Abstract

The invention relates to a grout state and strength determining device. The grout state and strength determining device comprises a base 1 and a support 5 which are fixedly connected, wherein a base plate 2 is arranged on the base 1, a glass plate 3 is arranged on the base plate 2, a container 4 is arranged on the glass plate 3, an upper slide bushing 6 and a lower slide bushing 7 which are coaxial are vertically arranged on the support 5, a fastening screw 8 is arranged on the lower slide bushing 7, three pressure measuring bars 9 penetrate the upper slide bushing 6 and the lower slide bushing 7 in a sleeving manner, the bottom of each pressure measuring bar is a plane, the pressure measuring bars 9 are in slide connection with the upper slide bushing and the lower slide bushing, a pointer 11 is arranged on the pressure measuring bar 9 between the two slide bushings through a fixing ring 12, and an indication plate 10 is further arranged on one sides of the upper slide bushing and the lower slide bushing and is a pressure scale plate. By means of the grout state and strength determining device, unknown new property of grout is determined after physical and mechanical properties of grout with different functions are tested.

Description

technical field [0001] The invention relates to the technical field of slurry measuring instruments for civil engineering and mining engineering, in particular to a device for measuring the state and strength of cement grouting slurry in rock mass reinforcement engineering and a method for using the same. Background technique [0002] At present, in water conservancy and hydropower, highways, railways, mining, bridges, tunnels, and rock and soil foundation reinforcement projects, anti-seepage, consolidation and filling cement grouting, and mortar plastering anti-seepage are frequently used measures to strengthen rock masses. However, both measures have the disadvantages of excessive shrinkage of the slurry and too long final setting time. The former disadvantage requires multiple grouting to become effective grouting; the latter disadvantage is that the setting time is too long, which makes the grouting work efficiency very low and directly affects the construction period. ...

AI Technical Summary

Problems solved by technology

The slurry state of the zero-shrinkage cement grouting slurry is different from the two states of ordinary slurry (plastic slurry-initial setting, initial setting-final setting), anti-seepage, plugging and reinforcement projects, generally need to borrow grouting The equipment can only be completed by applying pressure. The zero-shrinkage cement grouting slurry added with chemical slurry is in a solution state at the initial stage, and the injectability is good. As long as the small cracks or pores that can be injected with water, the chemical slurry can generally be injected. Therefore, in order to adapt to the pressure When grouting, add appropriate amount of different admixtures to control the five states of the slurry (liquid slurry, soft plastic early slurry, soft plastic late slurry, hard plastic slurry and final set slurry), especially It is a liquid slurry. However, when preparing cement grouting slurry with different functions, there is no instrument and equipment that can accurately identify the state of this type of slurry (liquid slurry, soft plastic early slurry, soft plastic late slurry, hard plastic slurry, etc.) Plastic slurry and final solidified slurry), slurry strength equipment, can not find the state of the slurry - the change law of pressure, and then can not formulate a grouting plan

Images