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Rapid-hardening self-leveling mortar material

A mortar material and self-leveling technology, applied in the field of materials in the field of construction engineering technology, achieves the effects of excellent filling, reducing environmental pollution and good fluidity

Inactive Publication Date: 2008-04-09
RAILWAY CONSTR INST RAILWAY SCI INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After searching, there is no relevant patent on materials for rapid-hardening self-leveling mortar for bridge supports in China at present.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0034] Early strength cement 35

[0035] Quartz sand 60

[0036] Retarder 0.5

[0037] Accelerator 0.05

[0038] Water reducer 0.4

[0039] Microsilica 2.0

[0040] Anti-crack agent 2.0

[0041] Defoamer 0.05

[0042] The quick-hardening self-leveling mortar dry powder material prepared by the above-mentioned components according to the aforementioned process, the dry powder material and water are stirred evenly according to the ratio of 1:0.14 (weight ratio), and the measured properties are as follows:

[0043] Fluidity: 330mm (initial), 280mm (30min) bleeding rate: 0;

[0044] Compressive strength: 32MPa(2h), 65MPa(24h), 78MPa(28d), 83MPa(56d), 92MPa(90d)

[0045] Flexural strength: 6.2MPa(2h), 10.8MPa(24h), 11.4MPa(28d), 11.4MPa(56d);

[0046] Elastic modulus: 37.2GPa (28d); free expansion rate under standard curing conditions: 0.03% (28d).

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Abstract

The invention relates to quick hardening smooth automatic flowing mortar grouting that is utilized in the installation of a trough type rubber support and a column surface steel support of a high-speed railroad and a railway transportation special line bridge. The formula can also be applied after the adjustment in the large-scale equipment installation and the structure patching reinforcement. The invention has various components and weight proportions that: rapid hardening cement is 20-50 percent, quartz sand is 40-60percent, retarder is 0.6-1.5percent, hardening preparation is 0.01-0.05 percent, water reducing agent is 0.4-1.2 percent, micro silica flour is 0.8-2.0 percent, Anti-crack medicinal preparation is 0.1-2.0 percent and defoamer is 0.01-0.05percent. The invention has the advantages of using conventional construction material, having widespread sources of raw materials and low cost; packed bags with on-spot mixing, the reduction of environmental pollution, easy operation, good fluidity of mortar, gravity grouting and labor cost reduction. The hydromass packing is fine, the micro inflation packing performance is well embodied in the plastic stage, and the hardening is without shrinkage; the hardened mortar has high hour intensity and the extra-long age has no phenomenon of reverse shrinking; after the full agitation and settlement of the mortar, the undesirable phenomena like weeping, lamination and settlement do not happen, and the color and the luster of the mortar at each side remain uniform with good equality; the mortar can be adaptive to the engineering under sundry circumstances (including low negative temperature and high temperature).

Description

technical field [0001] The present invention relates to a material in the technical field of construction engineering, in particular to a fast-hardening self-leveling mortar material for the installation of basin-type rubber bearings and cylindrical steel bearings of railway bridges. After the formula is improved, It can be used for large-scale equipment installation and fixing and building structure repair and reinforcement. Background technique [0002] High-speed railways and railway passenger dedicated lines put forward higher requirements on the stability of bridges and the safe service life of structures, and fully consider the comfort of passengers during train operation in the design. In order to meet the above requirements, the traditional The box girder erection support anchoring construction technology adopts fast-hardening self-leveling mortar for support anchoring. When erecting the bridge, place the box girder on the pre-leveled jack to ensure that the differe...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B14/06
Inventor 张勇杨富民
Owner RAILWAY CONSTR INST RAILWAY SCI INST
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