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Shrinkage compensating type high-performance mortar for grooving method closure grouting

A technology that compensates for shrinkage and high performance. It is used in the field of high-performance hydraulic engineering repair mortar. It can solve the problems of leakage, flow, and running on the surface. Effect

Inactive Publication Date: 2016-06-29
WATER CONSERVANCY & HYDROPOWER SCI RES INST OF LIAONING PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction operation is not easy, and there are often problems such as poor bonding and easy flow
The repaired surface treated with grooves is often filled and leveled with repairing mortar, but due to the self-shrinkage of the mortar after curing, new cracks are easily generated between the mortar surface and the concrete base surface, and the combination is not strict, and when the grouting pressure increases The surface is prone to problems such as leakage and running of pulp
In addition, ordinary mortar often has problems such as poor adhesion to the concrete base surface and poor bonding effect due to low construction bonding performance when performing vertical surface and top surface construction operations.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take 75% aggregate, 12.5% ​​cement, 1.5% polymer rubber powder, 0.8% silica fume, 1.25% ultrafine powder expansion agent, and 0.10% high-performance water reducing agent to make up the total mass of the mortar. The fine sand materials in the cement and aggregate enter the drying room through the conveyor belt for rapid drying and standby; the dried cement and fine sand are transported to the conical disperser for 30 minutes of dispersion and pre-mixing; then sequentially add Polymer rubber powder, silica fume, ultra-fine powder expansion agent and high-performance water reducer are used for secondary dispersion; after that, the polypropylene fiber in the aggregate is loaded into the fiber injector and sprayed to the top of the disperser at a speed of 3m / s At the first material inlet, slowly add steel-plastic fibers in the aggregate to the second material inlet at the top to keep the two synchronized; after adding the fibers, continue to disperse for 20 minutes, and then ...

Embodiment 2

[0026] Take 69% aggregate, 12.5% ​​cement, 3% polymer rubber powder, 1.2% silica fume, 2.5% ultrafine powder expansion agent, and 0.14% high-performance water reducer to make up the total mass of the mortar. The fine sand materials in the cement and aggregate enter the drying room through the conveyor belt for rapid drying and standby; the dried cement and fine sand are transported to the conical disperser for 30 minutes of dispersion and pre-mixing; then sequentially add Polymer rubber powder, silica fume, ultra-fine powder expansion agent and high-performance water reducer are used for secondary dispersion; after that, the polypropylene fiber in the aggregate is loaded into the fiber injector and sprayed to the top of the disperser at a speed of 3m / s At the first material inlet, slowly add steel-plastic fibers in the aggregate to the second material inlet at the top to keep the two synchronized; after adding the fibers, continue to disperse for 20 minutes, and then vacuumize ...

Embodiment 3

[0028] Take 74% aggregate, 12.5% ​​cement, 2.5% polymer powder, 1% silica fume, 2.3% superfine powder expansion agent, and 0.12% high-performance water reducer, which make up 74% of the total mass of the mortar. The fine sand materials in the cement and aggregate enter the drying room through the conveyor belt for rapid drying and standby; the dried cement and fine sand are transported to the conical disperser for 30 minutes of dispersion and pre-mixing; then sequentially add Polymer rubber powder, silica fume, ultra-fine powder expansion agent and high-performance water reducer are used for secondary dispersion; after that, the polypropylene fiber in the aggregate is loaded into the fiber injector and sprayed to the top of the disperser at a speed of 3m / s At the first material inlet, slowly add steel-plastic fibers in the aggregate to the second material inlet at the top to keep the two synchronized; after adding the fibers, continue to disperse for 20 minutes, and then vacuum...

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Abstract

The invention provides shrinkage compensating type high-performance mortar for grooving method closure grouting. The shrinkage compensating type high-performance mortar is characterized by being formed by compounding polymer gelatine powder, silica powder, a superfine micro-powder expanding agent, a high-performance water reducing agent, aggregate and a binding material through the processes of powder drying, dispersion machine pre-dispersion, fiber pre-mixing and vacuum sealing; the mortar is prepared from, by mass, 1.5-3% of polymer gelatine powder, 0.8-1.2% of silica powder, 1.25-2.5% of superfine micro-powder expanding agent, 0.10-0.14% of high-performance water reducing agent, 69-75% of aggregate and 12.5% of binding material (containing cement). The mortar has the advantages of good micro-expansibility, water retaining performance, waterproofness, easy binding and the like, and is suitable for grooving method chemical grouting construction on cracks and expansion joints, the surface of a dug dovetail-shaped groove is effectively closed, grout leakage and runout can be avoided, and grouting quality is improved.

Description

technical field [0001] The invention relates to high-performance hydraulic engineering repair mortar, in particular to a shrinkage-compensating high-performance mortar used for closed grouting by slotting method. Background technique [0002] For the chemical grouting treatment of cracks and expansion joints in water conservancy projects (tunnels, inverted siphons, culverts), the surface is generally sealed by slotting method. The performance of the plugging mortar has a great influence on the grouting effect. The plugging mortar with excellent performance It not only has good sealing performance, but also has good construction performance, which brings convenience to construction. [0003] Usually ordinary repair mortar only has high compressive strength, tensile strength and good flexural performance. The construction operation is not easy, and there are often problems such as poor bonding and easy flow. The repaired surface treated with grooves is often filled and level...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B111/70
CPCC04B28/00C04B2111/70C04B14/02C04B16/0633C04B20/0048C04B24/2623C04B24/2611C04B24/383C04B22/02C04B2103/0068C04B2103/302
Inventor 汪魁峰张永先夏海江宋立元刘波李括张瑞宫旭唐树新李远姜涛王烈韩东海姜伟民郭强
Owner WATER CONSERVANCY & HYDROPOWER SCI RES INST OF LIAONING PROVINCE
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