Preparation method for preparing high-strength fracture-resistant concrete from waste materials

Abstract

The invention belongs to the field of concrete preparation, and particularly relates to the field of preparation of high-strength fracture-resistant concrete from waste materials. The invention discloses a preparation method for preparing high-strength fracture-resistant concrete from waste materials. Raw materials comprise coarse aggregate, quick-hardening sulphoaluminate cement, modified waste residues, lime, sand, a water reducing agent, an early strength agent, a thickening agent and modified polypropylene fibers, the coarse aggregate is subjected to primary crushing and fine crushing, is mixed with other materials, and is uniformly distributed through a rotating chute; meanwhile, a spraying assembly is started for spraying water, and a motor is started for stirring. The strength and toughness of the concrete are improved through the modified waste residues and the modified polypropylene fibers, and a concrete mixing drum has the excellent effects that the mixing efficiency is high, raw material preparation and mixing devices are integrated, and the material ratio is dynamically controlled in real time.

Description

technical field [0001] The invention belongs to the field of concrete preparation, in particular to the field of preparing high-strength anti-fracture concrete by using waste materials. Background technique [0002] With the rapid development of social infrastructure, reinforced concrete, as the "skeleton" of infrastructure, is in increasing demand. With the rise of raw material prices, it is urgent to find a cheap concrete raw material replacement material. In the existing concrete preparation methods, the waste slag is usually ground and mixed directly in the form of raw materials, without considering the problem that the waste slag has a low viscosity and affects the strength of the concrete; with the continuous acceleration of urban construction in our country, a large amount of waste slag such as construction waste bricks The accumulation has already caused troubles to urban management. How to effectively utilize construction waste at low cost is a very practical probl...

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Problems solved by technology

It also specifically discloses that the top of the mixing mixer is provided with a nozzle for spraying the rosin thermopolymer solution, and the nozzle communicates with the rosin thermopolymer liquid preparation tank arranged outside the mixing mixer through a pump, and the mixing mixer The top of the mixer is provided with a nozzle for spraying rosin thermal polymer solution, and the nozzle is connected with the rosin thermal polymer liquid preparation tank arranged outside the mixing mixer through a pump, and the top of the mixing mixer is provided with a nozzle for spraying rosin thermal polymer solution. The nozzle of the polymer solution, the nozzle communicates with the rosin thermal polymer liquid mixing tank arranged outside the mixing mixer through a pump, but it does not consider the internal wear resistance of the mixer, the falling off of residual concrete and the dead zone at the bottom , the way to control the ratio of the mixture is only a simple flow meter, and it cannot realize dynamic control

[0007] Chinese patent application number: CN201420171984.5 discloses a foam concrete mixer, including a machine base, a drive motor, a mixing tank and a control system. Universal wheels are installed on the bottom of the machine base, and a drive motor and a drive motor are installed on the machine base. A stirring tank, the drive motor is connected to the stirring main shaft 7 on the mixing tank through a transmission belt, and the stirring main shaft controls the movement of the double-helix stirring paddle and the fan blade stirring paddle, and the mixing tank is provided with a cement inlet, a water inlet, an engine Foaming agent feed port and discharge port, the cement feed port has a built-in vibrating screen, and a layer of filter screen is placed horizontally in the middle of the mixing tank, which solves the problem of mixing uniformity, but ignores the dynamic control of raw material ratio, Issues such as improving the effect of waste recycling are also not considered

[0008] Aiming at the low strength of the block obtained by using construction waste in concrete in the prior art, even if the tensile strength of the concrete block is improved by doping certain fibers, the compressive strength is not obvious and other shortcomings, which are not found in the prior art Modification of construction waste residue, coal gangue, and diatomite tailings, and modification of polypropylene fibers at the same time to achieve an organic combination of the two. This application uses the modified raw materials to improve the strength and toughness of concrete

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