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Low-temperature quick repair mortar for pavement and preparation method for low-temperature quick repair mortar

A repair mortar, low temperature technology, applied in the field of building materials, can solve the problems of high epoxy resin price, drying shrinkage cracking, poor aging resistance, etc. Effect

Inactive Publication Date: 2014-05-21
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although asphalt concrete repair is simple and convenient, it has a large difference in rigidity from cement concrete pavement, and the color is not coordinated, so it can only be used as a temporary emergency treatment measure; special cement sets and hardens quickly, and has high early strength, which is comparable to the elastic modulus and the old concrete pavement. The coefficient of thermal expansion is similar, but problems such as strength shrinkage and drying shrinkage and cracking will occur; epoxy resin has the problems of expensive price and poor aging resistance
Moreover, the above-mentioned several pavement repair materials are mainly used in pavement repair projects at normal temperature, which are difficult to meet

Method used

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  • Low-temperature quick repair mortar for pavement and preparation method for low-temperature quick repair mortar
  • Low-temperature quick repair mortar for pavement and preparation method for low-temperature quick repair mortar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: The components and proportions (percentage by weight) of the road surface low-temperature rapid repair mortar are: Portland cement: 25, aluminate cement: 8.5, anhydrite: 5, quartz sand: 50, steel slag sand: 10 , EVA latex powder: 1.0, hydroxyethyl methylcellulose: 0.2, lithium carbonate: 0.2, silicone defoamer: 0.1. Its total parts by weight is 100 parts. Add 22 parts of tap water to 100 parts of mortar.

[0020] The performance results obtained by the detection test are shown in Table 1.

[0021] Table 1 Example 1 Pavement Low Temperature Rapid Repair Mortar Performance Test Results

[0022]

Embodiment 2

[0023] Example 2: The components and proportions (percentage by weight) of the low-temperature quick-repair mortar for pavement are: Portland cement: 31.8, aluminate cement: 6, anhydrite: 3.5, quartz sand: 45, steel slag sand: 12 , EVA latex powder: 1.2, hydroxyethyl methylcellulose: 0.15, lithium carbonate: 0.3, silicone defoamer: 0.05. Its total parts by weight is 100 parts. Add 20 parts of tap water to 100 parts of mortar.

[0024] The performance results obtained by the detection test are shown in Table 2.

[0025] Table 2 Performance test results of the road surface low-temperature rapid repair mortar in Example 2

[0026]

[0027] It can be seen from the above examples that the low-temperature quick-repair mortar for pavement according to the present invention can prepare quick-repair mortars used in low-temperature environments with different strength levels. All performance indicators meet or exceed the relevant standards and actual engineering requirements, and ...

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Abstract

The invention belongs to the technical field of building materials and particularly relates to the fields of low-temperature quick repair mortar for pavement and preparation methods for the low-temperature quick repair mortar. The low-temperature quick repair mortar comprises the following components in parts by weight: 25-35 parts of portland cement, 5-10 parts of aluminate cement, 3-6 parts of anhydrite, 30-60 parts of quartz sand, 8-15 parts of steel slag sand, 0.8-1.5 parts of emulsion powder, 0.1-0.3 part of cellulose ether, 0.2-0.4 part of lithium carbonate and 0.05-0.1 part of defoaming agent. The low-temperature quick repair mortar for the pavement disclosed by the invention has the advantages of excellent physical and mechanical performances, higher strength development at low temperature, higher strength, high bonding strength with an old pavement substrate and favorable wear resistance and durability; the low-temperature quick repair mortar is applied to road repair; particularly when the low-temperature quick repair mortar is applied to road repair in a low-temperature environment, the construction period can be greatly shortened, higher mechanical strength in a short period and a low temperature environment can be ensured, the construction efficiency is increased, the quality of projects is ensured and the cost of road maintenance projects is reduced.

Description

technical field [0001] The invention belongs to the field of building materials, and specifically relates to a compound made of Portland cement, aluminate cement, anhydrite, quartz sand, steel slag sand, EVA latex powder, hydroxyethyl methylcellulose, lithium carbonate and organic silicon defoamer A pavement low-temperature rapid repair mortar compounded with equal and precise proportions and a preparation method thereof. Background technique [0002] With the rapid development of my country's national economy, the construction of various roads, bridges, and municipal projects is rapid. Among them, the proportion of cement concrete pavement increased significantly. Under the repeated action of loads and the continuous influence of factors such as freeze-thaw cycle, salt freezing, carbonization, etc., as well as the combined effects of many factors such as design, construction, and maintenance, the cement concrete pavement will inevitably deteriorate during use. Various dam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B111/72
Inventor 张国防王培铭徐玲琳朱东坡
Owner TONGJI UNIV