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Geopolymer-fiber road pavement mending material and preparation method thereof

A technology for road pavement and repair materials, which is applied in the field of geopolymer-fiber road pavement repair materials and its preparation, can solve the problems of low flexural strength and tensile strength, poor work performance, and easy fiber agglomeration, etc., to achieve Improved flexural and tensile strength, good working performance, and short setting time

Active Publication Date: 2016-06-29
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although fly ash-based polymers have the advantages of rapid hardening and early strength, a significant defect is that they are relatively brittle.
Although the compressive strength is high, the flexural strength and tensile strength are low, and the toughness is not good
Adding fibers is a way to improve the toughness of materials, but in previous studies, although the toughness has been improved after adding fibers, the fluidity is often significantly reduced, the work performance is not good, and the fibers are easy to agglomerate

Method used

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  • Geopolymer-fiber road pavement mending material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: a kind of geopolymer-fiber road pavement repairing material, by fly ash 17.43kg, mineral powder 11.62kg, alkali activator solution (the water glass of alkali activator and analytically pure modulus are 1.8) 15.00kg , 0.75kg of water, and 0.125kg of fiber are mixed and prepared. The fiber diameter is 12 μm.

[0029] Such as figure 1 Shown, the preparation steps of above-mentioned geopolymer-fiber road pavement repair material:

[0030] 1) Weigh the fly ash and mineral powder according to the proportioning ratio and preliminarily mix them uniformly to obtain a composite powder of fly ash and mineral powder, which is placed on one side for later use;

[0031] 2) Take water glass and analytical pure (NaOH) according to the proportioning ratio, quickly add the analytical pure to water and stir to cool. High, during the cooling process of the solution, it should be continuously stirred to normal temperature to prepare the alkali activator solution of the requ...

Embodiment 2

[0036] Embodiment 2: a kind of geopolymer-fiber road pavement repairing material, by fly ash 18.06kg, mineral powder 12.04kg, alkali activator solution (the water glass of alkali activator and analytically pure modulus are 1.2) 11.34kg , 3.359kg of water, and 0.125kg of fiber are mixed and prepared.

[0037] The preparation steps of the above-mentioned geopolymer-fiber road pavement repair material are the same as those in Example 1.

[0038] The test performance results are as follows:

[0039] Fluidity: 235mm Initial setting time: 137min Final setting time: 182min

[0040] Pilot projects

Embodiment 3

[0041] Embodiment 3: a kind of geopolymer-fiber road pavement repairing material, by fly ash 18.06kg, mineral powder 12.04kg, alkali activator solution (the water glass of alkali activator and analytically pure modulus are 1.2) 11.34kg , 3.359kg of water, and 0.25kg of fiber are mixed and prepared.

[0042] The preparation steps of the above-mentioned geopolymer-fiber road pavement repair material are the same as those in Example 1.

[0043] The test performance results are as follows:

[0044] Fluidity: 235mm Initial setting time: 137min Final setting time: 182min

[0045] Pilot projects

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Abstract

The invention discloses a geopolymer-fiber road pavement mending material and a preparation method thereof. The mending material comprises the following components according to parts by weight: 38-52 parts of pulverized coal ash, 12-27 parts of mineral powder, 25-34 parts of an alkali activator, 0.27-0.55 part of fiber, and 1.6-6 parts of water. The alkali activator is made by mixing water glass and analytical pure according to a modulus of 1.2-1.8. The preparation method comprises the steps: weighing the pulverized coal ash and the mineral powder proportionally, and mixing well preliminarily to obtain pulverized coal ash and mineral powder composite powder; weighing the water glass and analytical pure according to the ratio, adding the analytical pure quickly into water, and stirring and cooling to obtain alkali activator solution of required modulus; weighing water and fiber according to the ratio, mixing well the water and the alkali activator solution, adding into the fiber, preliminarily stirring, adding the composite powder, and stirring well to obtain the mending material. The geopolymer-fiber road pavement mending material is good in mobility, high in compressive strength and breaking strength tensile strength, has high hardening speed and early strength, is high in toughness and is applicable to road emergency mending and reinforcing.

Description

technical field [0001] The invention belongs to the technical field of inorganic composite materials, in particular to a geopolymer-fiber road pavement repair material for road repair and reinforcement and a preparation method thereof. Background technique [0002] Under the influence of modern traffic and natural factors, there are inevitable deterioration problems in the use of cement concrete pavement, such as broken boards, subsidence, wrong platform, fragmentation, arching, exposed, pitted, polished, spliced, etc. Seam material damage, hollow pits and other problems, while existing repair materials have some unsatisfactory problems. [0003] At present, there are three main types of repair materials for concrete components: cement mortar, resin mortar, and polymer mortar. The bonding strength between cement mortar and old concrete is low, easy to shrink, and the repair effect is not good, and the main problem of this type of repair material in road repair is that it ta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B16/06
CPCC04B28/006C04B2111/0075C04B2111/72C04B2201/05C04B18/08C04B18/141C04B22/08C04B16/0641Y02P40/10
Inventor 徐方邓新陈建平彭超倪明亮黄晟朱新平陈倩王定鹏訚伟袁宗征刘苗王双超
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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