Multifunctional quick repair material for cement concrete pavements and preparation method thereof

A technology of cement concrete and repair materials, which is applied in the field of road repair, and can solve problems such as easy extrusion, shrinkage cracking, and low bond strength

Active Publication Date: 2013-06-12
SHANGHAI JIANWEI CULTURAL HERITAGE CONSERVATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These materials can only achieve the function of sealing the cracks, and cannot support the two walls of the cracks so that they cannot be jointly stressed with the road panels on both sides as a whole. Therefore, when the vehicle puts pressure on the two walls of the cracks, the cracks will spread and expand; in addition, due to these The shrinkage and expansion of the material and the cement concrete material are quite different, which makes it easy to be extruded in summer, and the extruded material falls off from the original place under the action of the wheel. In winter, when the concrete panel shrinks, a large gap is formed in the crack to fill The joint material fails; and, due to the large color contrast between the flexible repair material and the cement concrete pavement, black lines are formed on the pavement after pouring, which seriously affects the performance of the pavement
[0004] For the surface damage of cement concrete pavement, the traditional method of road maintenance department is to use asphalt mixture to repair it locally or cover it as a whole. Although the construction is relatively simple, because the rigidity of the two materials is inconsistent, the shear force between the interface Existence can easily l

Method used

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  • Multifunctional quick repair material for cement concrete pavements and preparation method thereof

Examples

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Effect test

example 1

[0043] Cement concrete pavement multifunctional rapid repair material is prepared from the following materials in weight ratio: 26% magnesium oxide, 22% diammonium hydrogen phosphate, 12% boric acid, 10-20% aluminate cement, 5-10 % fly ash, 3-10% rubber powder, 1.5% polypropylene fiber, 1% redispersible latex powder, water-binder ratio is 0.25, silica sol replaces water consumption by 40%. The setting time of the fast repair material obtained by this formula can meet the needs of fast repair, and has good fluidity, and is suitable for grouting for fractures such as cracks and for grouting for vertical displacements such as voids at the bottom of the slab.

[0044] The construction method is as follows: clean up the dust, mud and oil stains in the diseased area that may affect the bond strength of the interface between the repair material and the diseased area to be repaired; remove loose and broken concrete blocks, and remove the narrow width Widen or deepen the cracks or surf...

example 2

[0046] Cement concrete pavement multifunctional rapid repair material is prepared from the following materials by weight: 30% magnesium oxide, 26% diammonium hydrogen phosphate, 14% boric acid, 15% aluminate cement, 8% pulverized coal Ash, 5% rubber powder, 1.5% polypropylene fiber, 1.5% redispersible latex powder, water-binder ratio is 0.28, silica sol replaces water consumption by 20%. The forming time of the rapid repair material obtained by this formula can meet the demand for rapid repair, and has good fluidity, which is suitable for grouting for fracture defects such as cracks and grouting for vertical displacement defects such as voids at the bottom of the slab. Refer to Example 1 for the construction method.

example 3

[0048] Cement concrete pavement multifunctional rapid repair material is prepared from the following materials by weight: 33% machine-made sand or natural fine sand, 20% magnesium oxide, 17% diammonium hydrogen phosphate, 10% boric acid, 10% aluminum Salt cement, 5% fly ash, 3% rubber powder, 1% polypropylene fiber, 1% redispersible latex powder, the water-cement ratio is subject to better fluidity, and the amount of silica sol is water 40% of the amount. The rapid repair material obtained by this formula can meet the needs of rapid repair in setting time, has good fluidity, and is suitable for filling height difference for vertical displacement diseases such as staggered platforms and repairing surface layer diseases such as potholes. Refer to Example 1 for the construction method.

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Abstract

The invention relates to pavement repair, particularly a multifunctional quick repair material for cement concrete pavements, which is prepared by mixing the following raw materials in percentage by weight: 20-30% of magnesium oxide, 14-26% of ammonium monoacid phosphate, 9-14% of boric acid, 5-20% of aluminate cement, 2-10% of fly ash, 2-10% of rubber powder, 0.5-1.5% of polypropylene fiber, 0.5-1.5% of redispersible latex powder, silica sol and water; the silica sol accounts for 20-60% of the water. The preparation method of the multifunctional quick repair material for cement concrete pavements is implemented by proportionally mixing the raw materials. The material is convenient for construction, has enduring effect after curing, and has quick and enduring repair capacities for most damage forms of cement concrete pavements.

Description

technical field [0001] The invention relates to road surface repair, in particular to a material for road surface repair. Background technique [0002] Road maintenance is one of the important issues facing the field of road engineering today. According to statistics, in recent years, my country has spent more than 30 billion yuan on road maintenance and repairs every year. With the gradual improvement of my country's road traffic network, road maintenance has received more and more attention. Due to the characteristics of high strength, strong bearing capacity, wide application range, rich raw materials, and good durability, cement concrete pavement has always occupied an important position in my country's road network construction and is a very important pavement structure form. However, under the current situation, the service life of cement concrete pavement often does not reach the expected value. Many physical projects have only been open to traffic for a few years, a...

Claims

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Application Information

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IPC IPC(8): C04B28/34C04B111/72C04B111/70
Inventor 曹勇郭伟民薛柏清潘鹏
Owner SHANGHAI JIANWEI CULTURAL HERITAGE CONSERVATION TECH CO LTD
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