Method for preparing unsaturated carboxylate solution modified concrete compound material

A composite material and carboxylate technology, which is applied in the field of building materials, can solve the problems of increased cost and reduced durability of concrete, and achieve the effects of reduced blocking, short construction time, and short coagulation time

Inactive Publication Date: 2016-07-27
CHENGDU JUANCHENG CIVIL ENG INVESTIGATION & DESIGN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The application of polymer-modified concrete materials as bridge expansion joints has not been published in many public documents, and because there are many types of polymers, their composition and properties are different, and the performance is also quite different. Will increase the cost and may reduce the durability of the concrete

Method used

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  • Method for preparing unsaturated carboxylate solution modified concrete compound material
  • Method for preparing unsaturated carboxylate solution modified concrete compound material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] For the repair of existing highway bridges with rapid construction as the main purpose, in order to shorten the traffic closure time, reduce the impact on vehicle traffic, and meet the requirements of expansion joints, cold processing can be used in the actual construction process, as shown in Table 1. The weight ratios shown.

[0029] Table 1

[0030] Element

Weight ratio

cement

100 copies

water

30 copies

fly ash

30 copies

Silica fume

10 copies

30%~40% magnesium acrylate solution

100 copies

sodium persulfate

0.1 part

Sericite powder

10 copies

Silica

10 copies

Polypropylene fibers

10 copies

aggregate

350 copies

[0031] The preparation process is:

[0032] After mixing and stirring water and magnesium acrylate solution for 2 minutes, add sodium persulfate and polypropylene fiber in turn and stir until uniformly dispersed to form mixed so...

Embodiment 2

[0035] The main purpose is to meet the durability and elastic-plastic requirements for the construction of new road bridge expansion joints. In order to meet the durability requirements of engineering structure expansion joints and the purpose of driving comfort, cold processing is used in the actual construction process, as shown in Table 2. The weight ratio shown.

[0036] Table 2

[0037]

[0038]

[0039] The preparation process is:

[0040] After mixing and stirring water and magnesium acrylate solution for 2 minutes, add sodium persulfate and polypropylene fiber in turn and stir until uniformly dispersed to form mixed solution A; aggregate, cement, fly ash, silica fume, sericite powder and white carbon Mix black and stir until evenly dispersed, add 1 / 2 of mixed solution A and stir for 2 minutes, then add the remaining 1 / 2 of mixed solution A, stir until evenly dispersed.

[0041] The strength of the elastic-plastic material obtained in this example increases rapidl...

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Abstract

The invention discloses a method for preparing an unsaturated carboxylate solution modified concrete compound material. The method comprises the following steps of: mixing and stirring 20-60 parts of water and 100-150 parts of a magnesium acrylate solution for 2 minutes; respectively and sequentially adding 0.1-0.15 part of sodium persulfate and 5-12 parts of polypropylene fibers until the materials are uniformly dispersed to prepare a mixed solution A; mixing and stirring 300-400 parts of aggregates, 100 parts of cement, 0-40 parts of pulverized fuel ash, 0-10 parts of silica fume, 5-50 parts of sericite powder and 0-50 parts of white carbon black until the materials are uniformly dispersed, adding half mixed solution A, stirring for 2 minutes, adding the rest half mixed solution A, and stirring until the materials are uniformly dispersed. Compared with the prior art, the material has the advantages of convenience in construction, controllable curing time, good elastoplasticity, short construction time and the like and has a wide application prospect in the fields of expansion joints of highway, roads, bridges and other construction structures.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a method for preparing a concrete composite material modified by an unsaturated carboxylate solution. Background technique [0002] With the development of highways and urban roads in our country, the traffic volume and heavy vehicles have increased, and various types of bridge expansion devices generally have joint material aging and falling off, and rivets and anchors of steel tooth plates are cut or pulled apart. The reasonable selection of bridge expansion joints and the quality of construction and installation are very important to ensure the safety, speed and comfort of road transportation, and directly affect the service life and economy of the road. [0003] TST bridge expansion joint, also called seamless expansion joint adhesive, is a kind of asphalt-filled bridge expansion joint. This mixture of high-elastic special asphalt and stone can absorb the displace...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B28/04C04B28/06C04B24/04
CPCC04B28/00C04B28/006C04B28/04C04B28/06C04B18/08C04B18/146C04B24/04C04B22/142C04B14/20C04B14/06C04B16/0633
Inventor 杨平李福海周双张强
Owner CHENGDU JUANCHENG CIVIL ENG INVESTIGATION & DESIGN CO LTD
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