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Pre-activated clay-fluoroaluminate cement-based grouting material and preparation method thereof

A technology of fluoroaluminate and grouting materials, which is applied in the fields of grouting materials and preparation, preactivated clay-fluoroaluminate cement-based grouting materials and preparation, and can solve poor stability, long setting time, and water separation rate Advanced problems, to achieve the effect of enhanced expansibility, short setting time, and rapid strength growth

Active Publication Date: 2022-05-06
HARBIN INST OF TECH +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the grouting materials for concrete cracks are mainly chemical, cement and cement-clay grouts. Among them, the chemical grouting grouting effect is better, but the cost is high and has certain toxic side effects, while the cement is mostly prepared on the basis of ordinary Portland cement. The slurry material has long setting time, poor stability and high water separation rate, which is not conducive to the actual grouting application. The clay activity in the cement-clay slurry is low. During the cement hydration process, the clay particles are mainly cation exchange reactions, which contribute to the strength of the stone body. Small, resulting in cement-clay materials with long setting times and low strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] A preparation method of preactivated clay-fluoroaluminate cement-based grouting material, comprising the following steps:

[0016] Step 1: Weigh 197-199 parts of silty clay and 1-3 parts of strong alkali according to parts by mass, mix and soak the silty clay and water, take out after soaking and stir until uniform, soak for 1 day and stir for 10 minutes It is advisable to add strong alkali for pre-activation to obtain component A. The pre-activation time is 1-3 days, and the water-soil ratio is 0.6-1.2;

[0017] Step 2: Weigh 30 to 60 parts of cement, 15 to 30 parts of fly ash, 10 to 20 parts of mineral admixture, 8 parts of thixotropic agent and 4 to 10 parts of water-resistant dispersant according to parts by mass, and stir with a mixer After 10 minutes of mixing evenly, add water while stirring to prepare component B, and the water-cement ratio is 0.6-1;

[0018] Step 3: Pour component B into component A which is being stirred, and control the mass ratio of compone...

Embodiment 1

[0021] Preparation of component A: Accurately weigh 199 parts of silty clay, 1 part of strong alkali, and 200 parts of water, mix and soak the silty clay and water, soak for 1 day, take out and stir for 10 minutes until uniform, then add strong alkali for pre-activation, pre-activate After 1 day of activation, component A was prepared for use;

[0022] Preparation of component B: Accurately weigh and weigh 40 parts of cement, 20 parts of fly ash, 18 parts of mineral admixture, 8 parts of xanthan gum, 4 parts of water-resistant dispersant, and 100 parts of water. Put it into the blender and stir for 10 minutes until it is uniform, take it out, then put the water into the stirring pot, add the above-mentioned raw materials that are uniformly mixed while stirring, and then prepare the component B after stirring and mixing evenly;

[0023] Pour component B into component A which is being stirred, control the mass ratio of component A and component B to 0.7:1, and stir evenly to ob...

Embodiment 2

[0026] Preparation of component A: Accurately weigh 198.5 parts of silty clay, 1.5 parts of strong alkali, and 200 parts of water, mix and soak the silty clay and water, soak for 1 day, take it out and stir for 10 minutes until uniform, then add strong alkali for pre-activation. After 1 day of activation, component A was prepared for use;

[0027] Preparation of component B: Accurately weigh and weigh 60 parts of cement, 15 parts of fly ash, 10 parts of mineral admixture, 8 parts of xanthan gum, 7 parts of water-resistant dispersant, and 100 parts of water. Put it into the blender and stir for 10 minutes until it is uniform, take it out, then put the water into the stirring pot, add the above-mentioned raw materials that are uniformly mixed while stirring, and then prepare the component B after stirring and mixing evenly;

[0028] Pour component B into component A which is being stirred, control the mass ratio of component A to component B to 0.6:1, and stir evenly to obtain t...

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Abstract

The invention discloses a pre-activated clay-fluoroaluminate cement-based grouting material and a preparation method thereof, and relates to a grouting material and a preparation method thereof. The mass ratio of the component A to the component B is (0.4-0.7): 1, the component A is prepared from the following raw materials in parts by mass: 197-199 parts of silty clay and 1-3 parts of strong base, and the component B is prepared from the following raw materials in parts by mass: 30-60 parts of cement, 15-30 parts of fly ash, 10-20 parts of mineral admixture, 8 parts of thixotropic agent and 4-10 parts of water-resistant dispersant. The strength of a stone body can be improved, the setting time is short, the strength is rapidly increased, the stability is high, the bleeding rate is extremely low, and the performance requirement of reservoir dam crack plugging grouting is met.

Description

technical field [0001] The invention relates to a grouting material and a preparation method, in particular to a preactivated clay-fluoroaluminate cement-based grouting material and a preparation method, and belongs to the technical field of concrete crack repair and reinforcement. Background technique [0002] Large-scale reservoirs and dams are in operation for a long time, and generally do not allow interruption of operation due to repair and reinforcement projects. Only online repair and reinforcement can be carried out, and online repair and reinforcement are often carried out in wet or water environments. The diseases of large-scale reservoirs are mainly damage to concrete panels and lattice beams, crack damage and landslides in slopes, etc., and various cracks are the most prominent of these diseases. Crack failure may lead to gradual deformation or yield of the dam seat to the arch thrust during the operation period. In the case of severe abutment yielding or instabi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B111/70
CPCC04B28/06C04B2201/50C04B2111/70C04B7/02C04B14/10C04B22/062C04B24/38C04B18/08C04B22/064C04B22/00C04B22/0093C04B22/143C04B22/142C04B14/303C04B14/06C04B18/146C04B24/383Y02W30/91
Inventor 凌贤长郭小雨丛晟亦唐亮马朋辉马金骥王名远陈小玉
Owner HARBIN INST OF TECH
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