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Concrete repairation and protection method and concrete repairation and protection structure based on asphalt materials

A technology of asphalt concrete and asphalt materials, which is applied to cohesive pavement paved on site, buildings, roads, etc., which can solve the problems of unsuitable high-speed railway protective layer concrete repair and protection, insufficient cohesive force of base concrete, and weak deformation ability due to temperature difference. problems, to achieve the effect of ensuring the overall leveling and aesthetic effect, reducing labor input and low construction cost

Active Publication Date: 2018-11-23
JIANGSU SOBUTE NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, each of the above materials has a single function and poor comprehensive performance, so it is not suitable for the repair and protection of high-speed railway protective layer concrete alone.
For example, emulsified asphalt is convenient for construction, and the asphalt film formed by demulsification has a certain deformation ability and waterproof ability, but the anti-aging performance is average; asphalt mortar is easy to apply and has a certain waterproof ability, but the adhesion to the base concrete is insufficient. And the temperature difference deformation ability is weak; the temperature difference deformation ability of asphalt mixture is good, but the bonding force with the base concrete is also insufficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) Preparation of modified emulsified asphalt emulsion in permeation and curing waterproof layer on concrete surface:

[0060] Weigh 2 parts of high-osmotic emulsifier, add water to 36 parts, add a pH adjustment aid (hydrochloric acid) to about pH=2, and finally add water to 39 parts to obtain a soap solution. Heat the above 39 parts of soap liquid to 60°C, then transport the soap liquid into the colloid mill for circulation, take 50 parts of No. 70 petroleum pitch and heat it to 140°C, then input the 50 parts of hot petroleum pitch into the colloid mill, The colloid mill uniformly disperses and grinds for 2 minutes to obtain the permeable emulsified asphalt (60% solid content). The permeable emulsified asphalt is output to the colloid mill and cooled to room temperature. Referring to GB / T19077.1-2008 "Particle Size Analysis Laser Diffraction Method Part 1: General Rules", a laser particle size analyzer was used to measure the particle size distribution of the permeabl...

Embodiment 2

[0086]According to the materials and methods described in Example 1, the protective repair test was carried out on the C30 concrete surface, and the test pieces were prepared.

[0087] Taking the top surface of the test piece as the water-facing surface, apply a hydrostatic pressure of 0.3 MPa, remove the water pressure after 120 minutes, and then split the test piece. It is measured that the water has not penetrated into the concrete surface, so it can be judged that the repaired protective layer is not good. Water permeable, excellent waterproof performance.

[0088] Referring to GB / T 50082-2009 "Standard for Test Methods of Long-term Performance and Durability of Ordinary Concrete", the freeze-thaw cycle test was carried out on the above-mentioned specimens. After 250 freeze-thaw cycles, the dynamic elastic modulus of C30 concrete was 92% of the initial value. The mass loss is less than 1%. The winter temperature in Northeast my country is below the freezing point for a lo...

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Abstract

The invention provides a concrete repairation and protection method and a concrete repairation and protection structure based on asphalt materials. The method includes the following steps of (1) polishing damaged or pulverized portions of concrete surface until undamaged concrete is exposed; (2) evenly spraying or smearing modified emulsified asphalt emulsions onto the concrete surface according to the consumption of 0.2-0.6kg / m<2> to form a concrete surface permeation and solidification waterproof layer; (3) evenly smearing emulsified asphalt mortar with the initial extension reaching 260mm onto the concrete surface permeation and solidification waterproof layer, and controlling the thickness at 2-5mm to form an emulsified asphalt mortar protection waterproof leveling layer; (4) forming an asphalt concrete heat-insulating protection layer 2-6m in thickness on the surface of the non-solidified emulsified asphalt mortar protection waterproof leveling layer; (5) evenly spraying asphalt cement onto the surface of the asphalt concrete heat-insulating protection layer according to the consumption of 0.2-0.6kg / m<2> to form an asphalt cement waterproof anti-aging layer.

Description

technical field [0001] The invention relates to a concrete repair and protection method and structure based on asphalt materials, in particular to a repair and protection method and structure for high-speed railway bridge or roadbed protective layer concrete, and belongs to the field of high-speed railway engineering materials. Background technique [0002] On September 10, 2016, the Zhengzhou-Xuzhou high-speed railway in Mainland China opened for operation. So far, the operating mileage of China's high-speed railway has exceeded 20,000 kilometers, accounting for more than 60% of the world's total operating mileage of high-speed railways, ranking first in the world. Under the guidance of my country's medium and long-term railway network planning, the construction of high-speed railways is steadily advancing, and the scale will reach 30,000 kilometers by 2020. [0003] From the opening of the Qinhuangdao-Shenyang high-speed railway at the end of 2002 to the operation of the T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26E01C7/32C04B111/72
CPCC04B26/26C04B2111/72E01C7/32C04B14/06C04B14/04C04B16/06C04B14/14C04B20/0076C04B24/2611
Inventor 洪锦祥朱晓斌程金梁熊子佳张立华黄冲魏唐中邓成
Owner JIANGSU SOBUTE NEW MATERIALS
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