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Cement asphalt mortar used for high temperature complicated work condition, and preparation method and construction method thereof

A technology of cement asphalt and complex working conditions, which is applied in the field of cement asphalt mortar and its preparation, can solve the problems of difficult pouring of mortar, large loss of workability of cement asphalt mortar, etc., achieves good work performance, accurate and controllable construction process, and solves The effect of excessive sexual loss

Active Publication Date: 2012-06-20
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The object of the present invention is to provide a kind of cement asphalt mortar and its preparation method used in high temperature complicated working conditions, and construction method, can solve the problem that cement asphalt mortar workability loss is too large under high temperature, and mortar pouring is difficult during construction, described High temperature is 30~40℃

Method used

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  • Cement asphalt mortar used for high temperature complicated work condition, and preparation method and construction method thereof
  • Cement asphalt mortar used for high temperature complicated work condition, and preparation method and construction method thereof
  • Cement asphalt mortar used for high temperature complicated work condition, and preparation method and construction method thereof

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Embodiment 1

[0065] One, a kind of preparation method of the cement asphalt mortar that is used for high-temperature complicated working conditions, it comprises the steps:

[0066] 1) Preparation of emulsified asphalt: See Table 1 for the parts by weight of each component; dissolve the compound emulsifier and pH regulator in water at 50-65°C to prepare a soap solution; heat the base asphalt to 120-140°C to obtain a hot base Asphalt, the soap liquid and the hot base asphalt are added to the colloid mill at the same time, and emulsified asphalt is obtained after high-speed shearing; wherein, the composite emulsifier is obtained by compounding an anionic emulsifier and an auxiliary emulsifier (the weight parts are shown in Table 1 ).

[0067] The base asphalt is petroleum asphalt (Korean SK-70# petroleum asphalt), which is petroleum asphalt that meets the provisional technical conditions for cement-emulsified asphalt mortar of ballastless track of passenger dedicated railway.

[0068] The a...

Embodiment 2

[0111] A preparation method for cement asphalt mortar used in high-temperature complex working conditions, comprising the steps of:

[0112] 1) Preparation of emulsified asphalt (a kind of emulsified asphalt with high cement adaptability): its formula is prepared according to Example 2 in Table 1, wherein the base asphalt is SK-70# petroleum asphalt, and the anionic emulsifier (main emulsifier) ​​is Sodium dodecylbenzene sulfonate, nonionic emulsifier (auxiliary emulsifier) ​​is the fatty alcohol polyoxyethylene ether that EO number is 30, and pH regulator is ammoniacal liquor; Preparation method is with embodiment 1

[0113] The formulation of the existing common emulsified asphalt is shown in Comparative Example 2 in Table 2.

[0114] 2) Preparation of cement asphalt mortar for high temperature and complex working conditions:

[0115] Except emulsified asphalt, other raw materials are identical with embodiment 1. Implementation mix ratio and experimental result are shown i...

Embodiment 3

[0119] A preparation method for cement asphalt mortar used in high-temperature complex working conditions, comprising the steps of:

[0120] 1) Preparation of emulsified asphalt (a kind of emulsified asphalt with high cement adaptability): its formula is prepared according to Example 3 in Table 1, wherein the base asphalt is SK-70# petroleum asphalt, and the anionic emulsifier (main emulsifier) ​​is Sodium dodecylbenzene sulfonate, nonionic emulsifier (auxiliary emulsifier) ​​is the fatty alcohol polyoxyethylene ether that EO number is 60, and pH regulator is ammoniacal liquor; Preparation method is with embodiment 1

[0121] The formulation of the existing common emulsified asphalt is shown in Comparative Example 3 in Table 2.

[0122] 2) Preparation of cement asphalt mortar for high temperature and complex working conditions:

[0123] Except emulsified asphalt, other raw materials are identical with embodiment 1. Implementation mix ratio and experimental result are shown i...

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Abstract

The invention relates to a building material, and a preparation method and a construction method of the building material. A cement asphalt mortar used for high temperature complicated work condition is prepared from raw materials including cement, fine aggregate, expansion admixture, powdered aluminum, emulsified asphalt with high cement adaptability, water, high-efficiency set-retarding type water-reducer and foam suppressor; the weight part of each component is as follows: cement 100 parts, fine aggregate 135-175 parts, expansion admixture 10-15 parts, powdered aluminum 0.002-0.005 parts, emulsified asphalt 40-50 parts, water 20-40 parts, water-reducer 0.8-1.2 parts and foam suppressor 0.03-0.08 part; pre-wetting technology and grouting technology matched with high temperature weather are used; the working property of the mortar is good at high temperature of 30-40 degrees centigrade, the construction process is accurately controlled, the mortar grouting is full, the quality defects such as through hole and large air bubble and cavity are inexistent after de-molding; the size of the surface air bubble area is less than 1%, and the 1-3cm air bubble area is less than 0.05%. The invention solves the problems of too large loss of working property of cement asphalt mortar at high temperature and difficulty of mortar grouting during construction.

Description

technical field [0001] The invention relates to a building material, a preparation method and a construction method thereof, in particular to a cement asphalt mortar (CA mortar) used for high-speed railway slab-type ballastless track filling layer at high temperature, a preparation method thereof, and a construction method thereof. Background technique [0002] Cement asphalt mortar is a key structural material used in the filling layer of high-speed railway slab ballastless track. It is mainly composed of cement, emulsified asphalt, fine aggregate and various admixtures. It is mainly used for elastic vibration reduction, track accuracy adjustment, and support train The role of weight plays an important role in ensuring track smoothness, running comfort and safety. [0003] The working time of cement asphalt mortar is the key index to ensure the smooth progress of mortar construction, and the working performance of cement asphalt mortar is greatly affected by raw materials, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B26/26E01B29/00
Inventor 王发洲刘云鹏胡曙光张运华何永佳李进锐吴文选
Owner WUHAN UNIV OF TECH
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