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Early-strength pavement patching material and preparation method thereof

A pavement repair and admixture technology, which is applied in the field of early-strength pavement repair materials and its preparation, can solve the problems of short setting time of alkali-excited materials, difficult to control early performance, difficult construction, etc., to meet the requirements of environmental conditions without harsh, step process Short, good bonding performance

Pending Publication Date: 2019-11-22
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the setting time of high-strength alkali-activated materials is too short. If the proportion is improper, flash setting and false setting will also occur. The early performance is difficult to control and the construction is difficult.

Method used

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  • Early-strength pavement patching material and preparation method thereof
  • Early-strength pavement patching material and preparation method thereof
  • Early-strength pavement patching material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] An early-strength pavement repair material, comprising the following components in parts by weight:

[0048] 30 parts of blast furnace slag, 30 parts of fly ash, 5 parts of silica fume, 5 parts of metakaolin, 35 parts of activator, 8 parts of admixtures, admixtures include powder admixtures and liquid admixtures.

[0049] Wherein, the sum of oxides of calcium, silicon and aluminum in the blast furnace slag is greater than 85wt%, and the content of calcium carbonate in the blast furnace slag is less than or equal to 10wt%. Blast furnace slag is alkaline water quenched blast furnace slag, and the ageing time should be less than 1 year. The sum of oxides of calcium, silicon and aluminum in fly ash is greater than 85 wt%. The content of active silicon oxide in the silica fume is greater than 90%. The sum of oxides of silicon and aluminum in metakaolin is greater than 90 wt%. The carbon content of metakaolin is ≤10wt%. The stimulant is sodium silicate with a modulus of 1.0 to...

Embodiment 2

[0051] An early-strength pavement repair material, comprising the following components in parts by weight:

[0052] 70 parts of blast furnace slag, 70 parts of fly ash, 40 parts of silica fume, 40 parts of metakaolin, 120 parts of activator, 16 parts of admixtures, admixtures including powder external admixtures and liquid admixtures.

[0053] Wherein, the sum of oxides of calcium, silicon and aluminum in the blast furnace slag is greater than 85wt%, and the content of calcium carbonate in the blast furnace slag is less than or equal to 10wt%. Blast furnace slag is alkaline water quenched blast furnace slag, and the ageing time should be less than 1 year. The sum of oxides of calcium, silicon and aluminum in fly ash is greater than 85 wt%. The content of active silicon oxide in the silica fume is greater than 90%. The sum of oxides of silicon and aluminum in metakaolin is greater than 90 wt%. The carbon content of metakaolin is ≤10wt%. The stimulant is sodium silicate with a mo...

Embodiment 3

[0055] An early-strength pavement repair material, comprising the following components in parts by weight:

[0056] 50 parts of blast furnace slag, 40 parts of fly ash, 20 parts of silica fume, 20 parts of metakaolin, 65 parts of activator, 12 parts of admixtures, admixtures include powder admixtures and liquid admixtures.

[0057] Wherein, the sum of oxides of calcium, silicon and aluminum in the blast furnace slag is greater than 85wt%, and the content of calcium carbonate in the blast furnace slag is less than or equal to 10wt%. Blast furnace slag is alkaline water quenched blast furnace slag, and the ageing time should be less than 1 year. The sum of oxides of calcium, silicon and aluminum in fly ash is greater than 85 wt%. The content of active silicon oxide in the silica fume is greater than 90%. The sum of oxides of silicon and aluminum in metakaolin is greater than 90 wt%. The carbon content of metakaolin is ≤10wt%. The stimulant is sodium silicate with a modulus of 1.0...

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Abstract

The embodiment of the invention provides an early-strength pavement patching material and a preparation method thereof. The early-strength pavement patching material comprises the following components: blast furnace slag, fly ash, silica fume, metakaolin, an excitant and an additive; by compounding the several ash body components, a reaction is carried out under an alkaline condition to generate amaterial with high strength; then an additive is added for regulating and controlling the product, so that the problems that the alkali-activated material is too fast in early coagulation, relativelylarge in gas content and relatively large in shrinkage are solved. Different ash bodies are subjected to a composite reaction and an additive is added, so that the setting time, the fluidity, the mechanical strength development and the matrix pore content of the alkali-activated matrix material can be effectively regulated; the prepared pavement repair material has advantages of high regulation degree, good interface adhesion with old concrete, good compatibility, effective road durability improving, effective road service life prolonging, and suitableness for promotion and use. Another embodiment of the invention also provides a preparation method of the early-strength pavement patching material.

Description

Technical field [0001] The invention belongs to the technical field of concrete pavement repair, and specifically relates to an early-strength pavement repair material and a preparation method thereof. Background technique [0002] Cement concrete pavement has the advantages of high strength, good stability, large bearing capacity, long service life and low maintenance cost. Most countries and regions have widely adopted cement concrete pavement as the main structural form of highways, airport runways, station docks, and rural roads. [0003] With the substantial increase in traffic volume and the continuous increase in axle load, in addition, due to insufficient understanding and attention to the durability of urban roads and bridges in the early years, cement concrete pavements exist in the design, construction, management and later maintenance stages. Insufficiency, the cement concrete pavement laid in the early stage has different degrees of damage due to the overwhelming load...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/08C04B111/72
CPCC04B28/08C04B2111/72C04B2201/05C04B2201/50C04B18/08C04B18/146C04B14/106C04B14/06C04B14/00C04B12/04C04B22/10C04B22/0013C04B22/142C04B24/42
Inventor 马玉玮邓丽思罗甜恬杨志辉刘卫森陈炳聪
Owner GUANGZHOU UNIVERSITY
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